~bzr-pqm/bzr/bzr.dev

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
# Copyright (C) 2004 Aaron Bentley
# <aaron.bentley@utoronto.ca>
#
#    This program is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program; if not, write to the Free Software
#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import sys
import arch
import arch.util
import arch.arch
import abacmds
import cmdutil
import shutil
import os
import options
import paths 
import time
import cmd
import readline
import re
import string
import arch_core
from errors import *
import errors
import terminal
import ancillary
import misc
import email
import smtplib

__docformat__ = "restructuredtext"
__doc__ = "Implementation of user (sub) commands"
commands = {}

def find_command(cmd):
    """
    Return an instance of a command type.  Return None if the type isn't
    registered.

    :param cmd: the name of the command to look for
    :type cmd: the type of the command
    """
    if commands.has_key(cmd):
        return commands[cmd]()
    else:
        return None

class BaseCommand:
    def __call__(self, cmdline):
        try:
            self.do_command(cmdline.split())
        except cmdutil.GetHelp, e:
            self.help()
        except Exception, e:
            print e

    def get_completer(index):
        return None

    def complete(self, args, text):
        """
        Returns a list of possible completions for the given text.

        :param args: The complete list of arguments
        :type args: List of str
        :param text: text to complete (may be shorter than args[-1])
        :type text: str
        :rtype: list of str
        """
        matches = []
        candidates = None

        if len(args) > 0: 
            realtext = args[-1]
        else:
            realtext = ""

        try:
            parser=self.get_parser()
            if realtext.startswith('-'):
                candidates = parser.iter_options()
            else:
                (options, parsed_args) = parser.parse_args(args)

                if len (parsed_args) > 0:
                    candidates = self.get_completer(parsed_args[-1], len(parsed_args) -1)
                else:
                    candidates = self.get_completer("", 0)
        except:
            pass
        if candidates is None:
            return
        for candidate in candidates:
            candidate = str(candidate)
            if candidate.startswith(realtext):
                matches.append(candidate[len(realtext)- len(text):])
        return matches


class Help(BaseCommand):
    """
    Lists commands, prints help messages.
    """
    def __init__(self):
        self.description="Prints help mesages"
        self.parser = None

    def do_command(self, cmdargs):
        """
        Prints a help message.
        """
        options, args = self.get_parser().parse_args(cmdargs)
        if len(args) > 1:
            raise cmdutil.GetHelp

        if options.native or options.suggestions or options.external:
            native = options.native
            suggestions = options.suggestions
            external = options.external
        else:
            native = True
            suggestions = False
            external = True
        
        if len(args) == 0:
            self.list_commands(native, suggestions, external)
            return
        elif len(args) == 1:
            command_help(args[0])
            return

    def help(self):
        self.get_parser().print_help()
        print """
If no command is specified, commands are listed.  If a command is
specified, help for that command is listed.
        """

    def get_parser(self):
        """
        Returns the options parser to use for the "revision" command.

        :rtype: cmdutil.CmdOptionParser
        """
        if self.parser is not None:
            return self.parser
        parser=cmdutil.CmdOptionParser("fai help [command]")
        parser.add_option("-n", "--native", action="store_true", 
                         dest="native", help="Show native commands")
        parser.add_option("-e", "--external", action="store_true", 
                         dest="external", help="Show external commands")
        parser.add_option("-s", "--suggest", action="store_true", 
                         dest="suggestions", help="Show suggestions")
        self.parser = parser
        return parser 
      
    def list_commands(self, native=True, suggest=False, external=True):
        """
        Lists supported commands.

        :param native: list native, python-based commands
        :type native: bool
        :param external: list external aba-style commands
        :type external: bool
        """
        if native:
            print "Native Fai commands"
            keys=commands.keys()
            keys.sort()
            for k in keys:
                space=""
                for i in range(28-len(k)):
                    space+=" "
                print space+k+" : "+commands[k]().description
            print
        if suggest:
            print "Unavailable commands and suggested alternatives"
            key_list = suggestions.keys()
            key_list.sort()
            for key in key_list:
                print "%28s : %s" % (key, suggestions[key])
            print
        if external:
            fake_aba = abacmds.AbaCmds()
            if (fake_aba.abadir == ""):
                return
            print "External commands"
            fake_aba.list_commands()
            print
        if not suggest:
            print "Use help --suggest to list alternatives to tla and aba"\
                " commands."
        if options.tla_fallthrough and (native or external):
            print "Fai also supports tla commands."

def command_help(cmd):
    """
    Prints help for a command.

    :param cmd: The name of the command to print help for
    :type cmd: str
    """
    fake_aba = abacmds.AbaCmds()
    cmdobj = find_command(cmd)
    if cmdobj != None:
        cmdobj.help()
    elif suggestions.has_key(cmd):
        print "Not available\n" + suggestions[cmd]
    else:
        abacmd = fake_aba.is_command(cmd)
        if abacmd:
            abacmd.help()
        else:
            print "No help is available for \""+cmd+"\". Maybe try \"tla "+cmd+" -H\"?"



class Changes(BaseCommand):
    """
    the "changes" command: lists differences between trees/revisions:
    """
    
    def __init__(self):
        self.description="Lists what files have changed in the project tree"

    def get_completer(self, arg, index):
        if index > 1:
            return None
        try:
            tree = arch.tree_root()
        except:
            tree = None
        return cmdutil.iter_revision_completions(arg, tree)
    
    def parse_commandline(self, cmdline):
        """
        Parse commandline arguments.  Raises cmdutil.GetHelp if help is needed.
        
        :param cmdline: A list of arguments to parse
        :rtype: (options, Revision, Revision/WorkingTree)
        """
        parser=self.get_parser()
        (options, args) = parser.parse_args(cmdline)
        if len(args) > 2:
            raise cmdutil.GetHelp

        tree=arch.tree_root()
        if len(args) == 0:
            a_spec = cmdutil.comp_revision(tree)
        else:
            a_spec = cmdutil.determine_revision_tree(tree, args[0])
        cmdutil.ensure_archive_registered(a_spec.archive)
        if len(args) == 2:
            b_spec = cmdutil.determine_revision_tree(tree, args[1])
            cmdutil.ensure_archive_registered(b_spec.archive)
        else:
            b_spec=tree
        return options, a_spec, b_spec

    def do_command(self, cmdargs):
        """
        Master function that perfoms the "changes" command.
        """
        try:
            options, a_spec, b_spec = self.parse_commandline(cmdargs);
        except cmdutil.CantDetermineRevision, e:
            print e
            return
        except arch.errors.TreeRootError, e:
            print e
            return
        if options.changeset:
            changeset=options.changeset
            tmpdir = None
        else:
            tmpdir=cmdutil.tmpdir()
            changeset=tmpdir+"/changeset"
        try:
            delta=arch.iter_delta(a_spec, b_spec, changeset)
            try:
                for line in delta:
                    if cmdutil.chattermatch(line, "changeset:"):
                        pass
                    else:
                        cmdutil.colorize(line, options.suppress_chatter)
            except arch.util.ExecProblem, e:
                if e.proc.error and e.proc.error.startswith(
                    "missing explicit id for file"):
                    raise MissingID(e)
                else:
                    raise
            status=delta.status
            if status > 1:
                return
            if (options.perform_diff):
                chan = cmdutil.ChangesetMunger(changeset)
                chan.read_indices()
                if isinstance(b_spec, arch.Revision):
                    b_dir = b_spec.library_find()
                else:
                    b_dir = b_spec
                a_dir = a_spec.library_find()
                if options.diffopts is not None:
                    diffopts = options.diffopts.split()
                    cmdutil.show_custom_diffs(chan, diffopts, a_dir, b_dir)
                else:
                    cmdutil.show_diffs(delta.changeset)
        finally:
            if tmpdir and (os.access(tmpdir, os.X_OK)):
                shutil.rmtree(tmpdir)

    def get_parser(self):
        """
        Returns the options parser to use for the "changes" command.

        :rtype: cmdutil.CmdOptionParser
        """
        parser=cmdutil.CmdOptionParser("fai changes [options] [revision]"
                                       " [revision]")
        parser.add_option("-d", "--diff", action="store_true", 
                          dest="perform_diff", default=False, 
                          help="Show diffs in summary")
        parser.add_option("-c", "--changeset", dest="changeset", 
                          help="Store a changeset in the given directory", 
                          metavar="DIRECTORY")
        parser.add_option("-s", "--silent", action="store_true", 
                          dest="suppress_chatter", default=False, 
                          help="Suppress chatter messages")
        parser.add_option("--diffopts", dest="diffopts", 
                          help="Use the specified diff options", 
                          metavar="OPTIONS")

        return parser

    def help(self, parser=None):
        """
        Prints a help message.

        :param parser: If supplied, the parser to use for generating help.  If \
        not supplied, it is retrieved.
        :type parser: cmdutil.CmdOptionParser
        """
        if parser is None:
            parser=self.get_parser()
        parser.print_help()
        print """
Performs source-tree comparisons

If no revision is specified, the current project tree is compared to the
last-committed revision.  If one revision is specified, the current project
tree is compared to that revision.  If two revisions are specified, they are
compared to each other.
        """
        help_tree_spec() 
        return


class ApplyChanges(BaseCommand):
    """
    Apply differences between two revisions to a tree
    """
    
    def __init__(self):
        self.description="Applies changes to a project tree"
    
    def get_completer(self, arg, index):
        if index > 1:
            return None
        try:
            tree = arch.tree_root()
        except:
            tree = None
        return cmdutil.iter_revision_completions(arg, tree)

    def parse_commandline(self, cmdline, tree):
        """
        Parse commandline arguments.  Raises cmdutil.GetHelp if help is needed.
        
        :param cmdline: A list of arguments to parse
        :rtype: (options, Revision, Revision/WorkingTree)
        """
        parser=self.get_parser()
        (options, args) = parser.parse_args(cmdline)
        if len(args) != 2:
            raise cmdutil.GetHelp

        a_spec = cmdutil.determine_revision_tree(tree, args[0])
        cmdutil.ensure_archive_registered(a_spec.archive)
        b_spec = cmdutil.determine_revision_tree(tree, args[1])
        cmdutil.ensure_archive_registered(b_spec.archive)
        return options, a_spec, b_spec

    def do_command(self, cmdargs):
        """
        Master function that performs "apply-changes".
        """
        try:
            tree = arch.tree_root()
            options, a_spec, b_spec = self.parse_commandline(cmdargs, tree);
        except cmdutil.CantDetermineRevision, e:
            print e
            return
        except arch.errors.TreeRootError, e:
            print e
            return
        delta=cmdutil.apply_delta(a_spec, b_spec, tree)
        for line in cmdutil.iter_apply_delta_filter(delta):
            cmdutil.colorize(line, options.suppress_chatter)

    def get_parser(self):
        """
        Returns the options parser to use for the "apply-changes" command.

        :rtype: cmdutil.CmdOptionParser
        """
        parser=cmdutil.CmdOptionParser("fai apply-changes [options] revision"
                                       " revision")
        parser.add_option("-d", "--diff", action="store_true", 
                          dest="perform_diff", default=False, 
                          help="Show diffs in summary")
        parser.add_option("-c", "--changeset", dest="changeset", 
                          help="Store a changeset in the given directory", 
                          metavar="DIRECTORY")
        parser.add_option("-s", "--silent", action="store_true", 
                          dest="suppress_chatter", default=False, 
                          help="Suppress chatter messages")
        return parser

    def help(self, parser=None):
        """
        Prints a help message.

        :param parser: If supplied, the parser to use for generating help.  If \
        not supplied, it is retrieved.
        :type parser: cmdutil.CmdOptionParser
        """
        if parser is None:
            parser=self.get_parser()
        parser.print_help()
        print """
Applies changes to a project tree

Compares two revisions and applies the difference between them to the current
tree.
        """
        help_tree_spec() 
        return

class Update(BaseCommand):
    """
    Updates a project tree to a given revision, preserving un-committed hanges. 
    """
    
    def __init__(self):
        self.description="Apply the latest changes to the current directory"

    def get_completer(self, arg, index):
        if index > 0:
            return None
        try:
            tree = arch.tree_root()
        except:
            tree = None
        return cmdutil.iter_revision_completions(arg, tree)
    
    def parse_commandline(self, cmdline, tree):
        """
        Parse commandline arguments.  Raises cmdutil.GetHelp if help is needed.
        
        :param cmdline: A list of arguments to parse
        :rtype: (options, Revision, Revision/WorkingTree)
        """
        parser=self.get_parser()
        (options, args) = parser.parse_args(cmdline)
        if len(args) > 2:
            raise cmdutil.GetHelp

        spec=None
        if len(args)>0:
            spec=args[0]
        revision=cmdutil.determine_revision_arch(tree, spec)
        cmdutil.ensure_archive_registered(revision.archive)

        mirror_source = cmdutil.get_mirror_source(revision.archive)
        if mirror_source != None:
            if cmdutil.prompt("Mirror update"):
                cmd=cmdutil.mirror_archive(mirror_source, 
                    revision.archive, arch.NameParser(revision).get_package_version())
                for line in arch.chatter_classifier(cmd):
                    cmdutil.colorize(line, options.suppress_chatter)

                revision=cmdutil.determine_revision_arch(tree, spec)

        return options, revision 

    def do_command(self, cmdargs):
        """
        Master function that perfoms the "update" command.
        """
        tree=arch.tree_root()
        try:
            options, to_revision = self.parse_commandline(cmdargs, tree);
        except cmdutil.CantDetermineRevision, e:
            print e
            return
        except arch.errors.TreeRootError, e:
            print e
            return
        from_revision=cmdutil.tree_latest(tree)
        if from_revision==to_revision:
            print "Tree is already up to date with:\n"+str(to_revision)+"."
            return
        cmdutil.ensure_archive_registered(from_revision.archive)
        cmd=cmdutil.apply_delta(from_revision, to_revision, tree,
            options.patch_forward)
        for line in cmdutil.iter_apply_delta_filter(cmd):
            cmdutil.colorize(line)
        if to_revision.version != tree.tree_version:
            if cmdutil.prompt("Update version"):
                tree.tree_version = to_revision.version

    def get_parser(self):
        """
        Returns the options parser to use for the "update" command.

        :rtype: cmdutil.CmdOptionParser
        """
        parser=cmdutil.CmdOptionParser("fai update [options]"
                                       " [revision/version]")
        parser.add_option("-f", "--forward", action="store_true", 
                          dest="patch_forward", default=False, 
                          help="pass the --forward option to 'patch'")
        parser.add_option("-s", "--silent", action="store_true", 
                          dest="suppress_chatter", default=False, 
                          help="Suppress chatter messages")
        return parser

    def help(self, parser=None):
        """
        Prints a help message.

        :param parser: If supplied, the parser to use for generating help.  If \
        not supplied, it is retrieved.
        :type parser: cmdutil.CmdOptionParser
        """
        if parser is None:
            parser=self.get_parser()
        parser.print_help()
        print """
Updates a working tree to the current archive revision

If a revision or version is specified, that is used instead 
        """
        help_tree_spec() 
        return


class Commit(BaseCommand):
    """
    Create a revision based on the changes in the current tree.
    """
    
    def __init__(self):
        self.description="Write local changes to the archive"

    def get_completer(self, arg, index):
        if arg is None:
            arg = ""
        return iter_modified_file_completions(arch.tree_root(), arg)
#        return iter_source_file_completions(arch.tree_root(), arg)
    
    def parse_commandline(self, cmdline, tree):
        """
        Parse commandline arguments.  Raise cmtutil.GetHelp if help is needed.
        
        :param cmdline: A list of arguments to parse
        :rtype: (options, Revision, Revision/WorkingTree)
        """
        parser=self.get_parser()
        (options, args) = parser.parse_args(cmdline)

        if len(args) == 0:
            args = None
        revision=cmdutil.determine_revision_arch(tree, options.version)
        return options, revision.get_version(), args

    def do_command(self, cmdargs):
        """
        Master function that perfoms the "commit" command.
        """
        tree=arch.tree_root()
        options, version, files = self.parse_commandline(cmdargs, tree)
        if options.__dict__.has_key("base") and options.base:
            base = cmdutil.determine_revision_tree(tree, options.base)
        else:
            base = cmdutil.submit_revision(tree)
        
        writeversion=version
        archive=version.archive
        source=cmdutil.get_mirror_source(archive)
        allow_old=False
        writethrough="implicit"

        if source!=None:
            if writethrough=="explicit" and \
                cmdutil.prompt("Writethrough"):
                writeversion=arch.Version(str(source)+"/"+str(version.get_nonarch()))
            elif writethrough=="none":
                raise CommitToMirror(archive)

        elif archive.is_mirror:
            raise CommitToMirror(archive)

        try:
            last_revision=tree.iter_logs(version, True).next().revision
        except StopIteration, e:
            if cmdutil.prompt("Import from commit"):
                return do_import(version)
            else:
                raise NoVersionLogs(version)
        if last_revision!=version.iter_revisions(True).next():
            if not cmdutil.prompt("Out of date"):
                raise OutOfDate
            else:
                allow_old=True

        try:
            if not cmdutil.has_changed(version):
                if not cmdutil.prompt("Empty commit"):
                    raise EmptyCommit
        except arch.util.ExecProblem, e:
            if e.proc.error and e.proc.error.startswith(
                "missing explicit id for file"):
                raise MissingID(e)
            else:
                raise
        log = tree.log_message(create=False)
        if log is None:
            try:
                if cmdutil.prompt("Create log"):
                    edit_log(tree)

            except cmdutil.NoEditorSpecified, e:
                raise CommandFailed(e)
            log = tree.log_message(create=False)
        if log is None: 
            raise NoLogMessage
        if log["Summary"] is None or len(log["Summary"].strip()) == 0:
            if not cmdutil.prompt("Omit log summary"):
                raise errors.NoLogSummary
        try:
            for line in tree.iter_commit(version, seal=options.seal_version,
                base=base, out_of_date_ok=allow_old, file_list=files):
                cmdutil.colorize(line, options.suppress_chatter)

        except arch.util.ExecProblem, e:
            if e.proc.error and e.proc.error.startswith(
                "These files violate naming conventions:"):
                raise LintFailure(e.proc.error)
            else:
                raise

    def get_parser(self):
        """
        Returns the options parser to use for the "commit" command.

        :rtype: cmdutil.CmdOptionParser
        """

        parser=cmdutil.CmdOptionParser("fai commit [options] [file1]"
                                       " [file2...]")
        parser.add_option("--seal", action="store_true", 
                          dest="seal_version", default=False, 
                          help="seal this version")
        parser.add_option("-v", "--version", dest="version", 
                          help="Use the specified version", 
                          metavar="VERSION")
        parser.add_option("-s", "--silent", action="store_true", 
                          dest="suppress_chatter", default=False, 
                          help="Suppress chatter messages")
        if cmdutil.supports_switch("commit", "--base"):
            parser.add_option("--base", dest="base", help="", 
                              metavar="REVISION")
        return parser

    def help(self, parser=None):
        """
        Prints a help message.

        :param parser: If supplied, the parser to use for generating help.  If \
        not supplied, it is retrieved.
        :type parser: cmdutil.CmdOptionParser
        """
        if parser is None:
            parser=self.get_parser()
        parser.print_help()
        print """
Updates a working tree to the current archive revision

If a version is specified, that is used instead 
        """
#        help_tree_spec() 
        return



class CatLog(BaseCommand):
    """
    Print the log of a given file (from current tree)
    """
    def __init__(self):
        self.description="Prints the patch log for a revision"

    def get_completer(self, arg, index):
        if index > 0:
            return None
        try:
            tree = arch.tree_root()
        except:
            tree = None
        return cmdutil.iter_revision_completions(arg, tree)

    def do_command(self, cmdargs):
        """
        Master function that perfoms the "cat-log" command.
        """
        parser=self.get_parser()
        (options, args) = parser.parse_args(cmdargs)
        try:
            tree = arch.tree_root()
        except arch.errors.TreeRootError, e:
            tree = None
        spec=None
        if len(args) > 0:
            spec=args[0]
        if len(args) > 1:
            raise cmdutil.GetHelp()
        try:
            if tree:
                revision = cmdutil.determine_revision_tree(tree, spec)
            else:
                revision = cmdutil.determine_revision_arch(tree, spec)
        except cmdutil.CantDetermineRevision, e:
            raise CommandFailedWrapper(e)
        log = None
        
        use_tree = (options.source == "tree" or \
            (options.source == "any" and tree))
        use_arch = (options.source == "archive" or options.source == "any")
        
        log = None
        if use_tree:
            for log in tree.iter_logs(revision.get_version()):
                if log.revision == revision:
                    break
                else:
                    log = None
        if log is None and use_arch:
            cmdutil.ensure_revision_exists(revision)
            log = arch.Patchlog(revision)
        if log is not None:
            for item in log.items():
                print "%s: %s" % item
            print log.description

    def get_parser(self):
        """
        Returns the options parser to use for the "cat-log" command.

        :rtype: cmdutil.CmdOptionParser
        """
        parser=cmdutil.CmdOptionParser("fai cat-log [revision]")
        parser.add_option("--archive", action="store_const", dest="source",
                          const="archive", default="any",
                          help="Always get the log from the archive")
        parser.add_option("--tree", action="store_const", dest="source",
                          const="tree", help="Always get the log from the tree")
        return parser 

    def help(self, parser=None):
        """
        Prints a help message.

        :param parser: If supplied, the parser to use for generating help.  If \
        not supplied, it is retrieved.
        :type parser: cmdutil.CmdOptionParser
        """
        if parser==None:
            parser=self.get_parser()
        parser.print_help()
        print """
Prints the log for the specified revision
        """
        help_tree_spec()
        return

class Revert(BaseCommand):
    """ Reverts a tree (or aspects of it) to a revision
    """
    def __init__(self):
        self.description="Reverts a tree (or aspects of it) to a revision "

    def get_completer(self, arg, index):
        if index > 0:
            return None
        try:
            tree = arch.tree_root()
        except:
            tree = None
        return iter_modified_file_completions(tree, arg)

    def do_command(self, cmdargs):
        """
        Master function that perfoms the "revert" command.
        """
        parser=self.get_parser()
        (options, args) = parser.parse_args(cmdargs)
        try:
            tree = arch.tree_root()
        except arch.errors.TreeRootError, e:
            raise CommandFailed(e)
        spec=None
        if options.revision is not None:
            spec=options.revision
        try:
            if spec is not None:
                revision = cmdutil.determine_revision_tree(tree, spec)
            else:
                revision = cmdutil.comp_revision(tree)
        except cmdutil.CantDetermineRevision, e:
            raise CommandFailedWrapper(e)
        munger = None

        if options.file_contents or options.file_perms or options.deletions\
            or options.additions or options.renames or options.hunk_prompt:
            munger = cmdutil.MungeOpts()
            munger.hunk_prompt = options.hunk_prompt

        if len(args) > 0 or options.logs or options.pattern_files or \
            options.control:
            if munger is None:
                munger = cmdutil.MungeOpts(True)
                munger.all_types(True)
        if len(args) > 0:
            t_cwd = cmdutil.tree_cwd(tree)
            for name in args:
                if len(t_cwd) > 0:
                    t_cwd += "/"
                name = "./" + t_cwd + name
                munger.add_keep_file(name);

        if options.file_perms:
            munger.file_perms = True
        if options.file_contents:
            munger.file_contents = True
        if options.deletions:
            munger.deletions = True
        if options.additions:
            munger.additions = True
        if options.renames:
            munger.renames = True
        if options.logs:
            munger.add_keep_pattern('^\./\{arch\}/[^=].*')
        if options.control:
            munger.add_keep_pattern("/\.arch-ids|^\./\{arch\}|"\
                                    "/\.arch-inventory$")
        if options.pattern_files:
            munger.add_keep_pattern(options.pattern_files)
                
        for line in cmdutil.revert(tree, revision, munger, 
                                   not options.no_output):
            cmdutil.colorize(line)


    def get_parser(self):
        """
        Returns the options parser to use for the "cat-log" command.

        :rtype: cmdutil.CmdOptionParser
        """
        parser=cmdutil.CmdOptionParser("fai revert [options] [FILE...]")
        parser.add_option("", "--contents", action="store_true", 
                          dest="file_contents", 
                          help="Revert file content changes")
        parser.add_option("", "--permissions", action="store_true", 
                          dest="file_perms", 
                          help="Revert file permissions changes")
        parser.add_option("", "--deletions", action="store_true", 
                          dest="deletions", 
                          help="Restore deleted files")
        parser.add_option("", "--additions", action="store_true", 
                          dest="additions", 
                          help="Remove added files")
        parser.add_option("", "--renames", action="store_true", 
                          dest="renames", 
                          help="Revert file names")
        parser.add_option("--hunks", action="store_true", 
                          dest="hunk_prompt", default=False,
                          help="Prompt which hunks to revert")
        parser.add_option("--pattern-files", dest="pattern_files", 
                          help="Revert files that match this pattern", 
                          metavar="REGEX")
        parser.add_option("--logs", action="store_true", 
                          dest="logs", default=False,
                          help="Revert only logs")
        parser.add_option("--control-files", action="store_true", 
                          dest="control", default=False,
                          help="Revert logs and other control files")
        parser.add_option("-n", "--no-output", action="store_true", 
                          dest="no_output", 
                          help="Don't keep an undo changeset")
        parser.add_option("--revision", dest="revision", 
                          help="Revert to the specified revision", 
                          metavar="REVISION")
        return parser 

    def help(self, parser=None):
        """
        Prints a help message.

        :param parser: If supplied, the parser to use for generating help.  If \
        not supplied, it is retrieved.
        :type parser: cmdutil.CmdOptionParser
        """
        if parser==None:
            parser=self.get_parser()
        parser.print_help()
        print """
Reverts changes in the current working tree.  If no flags are specified, all
types of changes are reverted.  Otherwise, only selected types of changes are
reverted.  

If a revision is specified on the commandline, differences between the current
tree and that revision are reverted.  If a version is specified, the current
tree is used to determine the revision.

If files are specified, only those files listed will have any changes applied.
To specify a renamed file, you can use either the old or new name. (or both!)

Unless "-n" is specified, reversions can be undone with "redo".
        """
        return

class Revision(BaseCommand):
    """
    Print a revision name based on a revision specifier
    """
    def __init__(self):
        self.description="Prints the name of a revision"

    def get_completer(self, arg, index):
        if index > 0:
            return None
        try:
            tree = arch.tree_root()
        except:
            tree = None
        return cmdutil.iter_revision_completions(arg, tree)

    def do_command(self, cmdargs):
        """
        Master function that perfoms the "revision" command.
        """
        parser=self.get_parser()
        (options, args) = parser.parse_args(cmdargs)

        try:
            tree = arch.tree_root()
        except arch.errors.TreeRootError:
            tree = None

        spec=None
        if len(args) > 0:
            spec=args[0]
        if len(args) > 1:
            raise cmdutil.GetHelp
        try:
            if tree:
                revision = cmdutil.determine_revision_tree(tree, spec)
            else:
                revision = cmdutil.determine_revision_arch(tree, spec)
        except cmdutil.CantDetermineRevision, e:
            print str(e)
            return
        print options.display(revision)

    def get_parser(self):
        """
        Returns the options parser to use for the "revision" command.

        :rtype: cmdutil.CmdOptionParser
        """
        parser=cmdutil.CmdOptionParser("fai revision [revision]")
        parser.add_option("", "--location", action="store_const", 
                         const=paths.determine_path, dest="display", 
                         help="Show location instead of name", default=str)
        parser.add_option("--import", action="store_const", 
                         const=paths.determine_import_path, dest="display",  
                         help="Show location of import file")
        parser.add_option("--log", action="store_const", 
                         const=paths.determine_log_path, dest="display", 
                         help="Show location of log file")
        parser.add_option("--patch", action="store_const", 
                         dest="display", const=paths.determine_patch_path,
                         help="Show location of patchfile")
        parser.add_option("--continuation", action="store_const", 
                         const=paths.determine_continuation_path, 
                         dest="display",
                         help="Show location of continuation file")
        parser.add_option("--cacherev", action="store_const", 
                         const=paths.determine_cacherev_path, dest="display",
                         help="Show location of cacherev file")
        return parser 

    def help(self, parser=None):
        """
        Prints a help message.

        :param parser: If supplied, the parser to use for generating help.  If \
        not supplied, it is retrieved.
        :type parser: cmdutil.CmdOptionParser
        """
        if parser==None:
            parser=self.get_parser()
        parser.print_help()
        print """
Expands aliases and prints the name of the specified revision.  Instead of
the name, several options can be used to print locations.  If more than one is
specified, the last one is used.
        """
        help_tree_spec()
        return

def require_version_exists(version, spec):
    if not version.exists():
        raise cmdutil.CantDetermineVersion(spec, 
                                           "The version %s does not exist." \
                                           % version)

class Revisions(BaseCommand):
    """
    Print a revision name based on a revision specifier
    """
    def __init__(self):
        self.description="Lists revisions"
    
    def do_command(self, cmdargs):
        """
        Master function that perfoms the "revision" command.
        """
        (options, args) = self.get_parser().parse_args(cmdargs)
        if len(args) > 1:
            raise cmdutil.GetHelp
        try:
            self.tree = arch.tree_root()
        except arch.errors.TreeRootError:
            self.tree = None
        try:
            iter = self.get_iterator(options.type, args, options.reverse, 
                                     options.modified)
        except cmdutil.CantDetermineRevision, e:
            raise CommandFailedWrapper(e)

        if options.skip is not None:
            iter = cmdutil.iter_skip(iter, int(options.skip))

        for revision in iter:
            log = None
            if isinstance(revision, arch.Patchlog):
                log = revision
                revision=revision.revision
            print options.display(revision)
            if log is None and (options.summary or options.creator or 
                                options.date or options.merges):
                log = revision.patchlog
            if options.creator:
                print "    %s" % log.creator
            if options.date:
                print "    %s" % time.strftime('%Y-%m-%d %H:%M:%S %Z', log.date)
            if options.summary:
                print "    %s" % log.summary
            if options.merges:
                showed_title = False
                for revision in log.merged_patches:
                    if not showed_title:
                        print "    Merged:"
                        showed_title = True
                    print "    %s" % revision

    def get_iterator(self, type, args, reverse, modified):
        if len(args) > 0:
            spec = args[0]
        else:
            spec = None
        if modified is not None:
            iter = cmdutil.modified_iter(modified, self.tree)
            if reverse:
                return iter
            else:
                return cmdutil.iter_reverse(iter)
        elif type == "archive":
            if spec is None:
                if self.tree is None:
                    raise cmdutil.CantDetermineRevision("", 
                                                        "Not in a project tree")
                version = cmdutil.determine_version_tree(spec, self.tree)
            else:
                version = cmdutil.determine_version_arch(spec, self.tree)
                cmdutil.ensure_archive_registered(version.archive)
                require_version_exists(version, spec)
            return version.iter_revisions(reverse)
        elif type == "cacherevs":
            if spec is None:
                if self.tree is None:
                    raise cmdutil.CantDetermineRevision("", 
                                                        "Not in a project tree")
                version = cmdutil.determine_version_tree(spec, self.tree)
            else:
                version = cmdutil.determine_version_arch(spec, self.tree)
                cmdutil.ensure_archive_registered(version.archive)
                require_version_exists(version, spec)
            return cmdutil.iter_cacherevs(version, reverse)
        elif type == "library":
            if spec is None:
                if self.tree is None:
                    raise cmdutil.CantDetermineRevision("", 
                                                        "Not in a project tree")
                version = cmdutil.determine_version_tree(spec, self.tree)
            else:
                version = cmdutil.determine_version_arch(spec, self.tree)
            return version.iter_library_revisions(reverse)
        elif type == "logs":
            if self.tree is None:
                raise cmdutil.CantDetermineRevision("", "Not in a project tree")
            return self.tree.iter_logs(cmdutil.determine_version_tree(spec, \
                                  self.tree), reverse)
        elif type == "missing" or type == "skip-present":
            if self.tree is None:
                raise cmdutil.CantDetermineRevision("", "Not in a project tree")
            skip = (type == "skip-present")
            version = cmdutil.determine_version_tree(spec, self.tree)
            cmdutil.ensure_archive_registered(version.archive)
            require_version_exists(version, spec)
            return cmdutil.iter_missing(self.tree, version, reverse,
                                        skip_present=skip)

        elif type == "present":
            if self.tree is None:
                raise cmdutil.CantDetermineRevision("", "Not in a project tree")
            version = cmdutil.determine_version_tree(spec, self.tree)
            cmdutil.ensure_archive_registered(version.archive)
            require_version_exists(version, spec)
            return cmdutil.iter_present(self.tree, version, reverse)

        elif type == "new-merges" or type == "direct-merges":
            if self.tree is None:
                raise cmdutil.CantDetermineRevision("", "Not in a project tree")
            version = cmdutil.determine_version_tree(spec, self.tree)
            cmdutil.ensure_archive_registered(version.archive)
            require_version_exists(version, spec)
            iter = cmdutil.iter_new_merges(self.tree, version, reverse)
            if type == "new-merges":
                return iter
            elif type == "direct-merges":
                return cmdutil.direct_merges(iter)

        elif type == "missing-from":
            if self.tree is None:
                raise cmdutil.CantDetermineRevision("", "Not in a project tree")
            revision = cmdutil.determine_revision_tree(self.tree, spec)
            libtree = cmdutil.find_or_make_local_revision(revision)
            return cmdutil.iter_missing(libtree, self.tree.tree_version,
                                        reverse)

        elif type == "partner-missing":
            return cmdutil.iter_partner_missing(self.tree, reverse)

        elif type == "ancestry":
            revision = cmdutil.determine_revision_tree(self.tree, spec)
            iter = cmdutil._iter_ancestry(self.tree, revision)
            if reverse:
                return iter
            else:
                return cmdutil.iter_reverse(iter)

        elif type == "dependencies" or type == "non-dependencies":
            nondeps = (type == "non-dependencies")
            revision = cmdutil.determine_revision_tree(self.tree, spec)
            anc_iter = cmdutil._iter_ancestry(self.tree, revision)
            iter_depends = cmdutil.iter_depends(anc_iter, nondeps)
            if reverse:
                return iter_depends
            else:
                return cmdutil.iter_reverse(iter_depends)
        elif type == "micro":
            return cmdutil.iter_micro(self.tree)

    
    def get_parser(self):
        """
        Returns the options parser to use for the "revision" command.

        :rtype: cmdutil.CmdOptionParser
        """
        parser=cmdutil.CmdOptionParser("fai revisions [revision]")
        select = cmdutil.OptionGroup(parser, "Selection options",
                          "Control which revisions are listed.  These options"
                          " are mutually exclusive.  If more than one is"
                          " specified, the last is used.")
        select.add_option("", "--archive", action="store_const", 
                          const="archive", dest="type", default="archive",
                          help="List all revisions in the archive")
        select.add_option("", "--cacherevs", action="store_const", 
                          const="cacherevs", dest="type",
                          help="List all revisions stored in the archive as "
                          "complete copies")
        select.add_option("", "--logs", action="store_const", 
                          const="logs", dest="type",
                          help="List revisions that have a patchlog in the "
                          "tree")
        select.add_option("", "--missing", action="store_const", 
                          const="missing", dest="type",
                          help="List revisions from the specified version that"
                          " have no patchlog in the tree")
        select.add_option("", "--skip-present", action="store_const", 
                          const="skip-present", dest="type",
                          help="List revisions from the specified version that"
                          " have no patchlogs at all in the tree")
        select.add_option("", "--present", action="store_const", 
                          const="present", dest="type",
                          help="List revisions from the specified version that"
                          " have no patchlog in the tree, but can't be merged")
        select.add_option("", "--missing-from", action="store_const", 
                          const="missing-from", dest="type",
                          help="List revisions from the specified revision "
                          "that have no patchlog for the tree version")
        select.add_option("", "--partner-missing", action="store_const", 
                          const="partner-missing", dest="type",
                          help="List revisions in partner versions that are"
                          " missing")
        select.add_option("", "--new-merges", action="store_const", 
                          const="new-merges", dest="type",
                          help="List revisions that have had patchlogs added"
                          " to the tree since the last commit")
        select.add_option("", "--direct-merges", action="store_const", 
                          const="direct-merges", dest="type",
                          help="List revisions that have been directly added"
                          " to tree since the last commit ")
        select.add_option("", "--library", action="store_const", 
                          const="library", dest="type",
                          help="List revisions in the revision library")
        select.add_option("", "--ancestry", action="store_const", 
                          const="ancestry", dest="type",
                          help="List revisions that are ancestors of the "
                          "current tree version")

        select.add_option("", "--dependencies", action="store_const", 
                          const="dependencies", dest="type",
                          help="List revisions that the given revision "
                          "depends on")

        select.add_option("", "--non-dependencies", action="store_const", 
                          const="non-dependencies", dest="type",
                          help="List revisions that the given revision "
                          "does not depend on")

        select.add_option("--micro", action="store_const", 
                          const="micro", dest="type",
                          help="List partner revisions aimed for this "
                          "micro-branch")

        select.add_option("", "--modified", dest="modified", 
                          help="List tree ancestor revisions that modified a "
                          "given file", metavar="FILE[:LINE]")

        parser.add_option("", "--skip", dest="skip", 
                          help="Skip revisions.  Positive numbers skip from "
                          "beginning, negative skip from end.",
                          metavar="NUMBER")

        parser.add_option_group(select)

        format = cmdutil.OptionGroup(parser, "Revision format options",
                          "These control the appearance of listed revisions")
        format.add_option("", "--location", action="store_const", 
                         const=paths.determine_path, dest="display", 
                         help="Show location instead of name", default=str)
        format.add_option("--import", action="store_const", 
                         const=paths.determine_import_path, dest="display",  
                         help="Show location of import file")
        format.add_option("--log", action="store_const", 
                         const=paths.determine_log_path, dest="display", 
                         help="Show location of log file")
        format.add_option("--patch", action="store_const", 
                         dest="display", const=paths.determine_patch_path,
                         help="Show location of patchfile")
        format.add_option("--continuation", action="store_const", 
                         const=paths.determine_continuation_path, 
                         dest="display",
                         help="Show location of continuation file")
        format.add_option("--cacherev", action="store_const", 
                         const=paths.determine_cacherev_path, dest="display",
                         help="Show location of cacherev file")
        parser.add_option_group(format)
        display = cmdutil.OptionGroup(parser, "Display format options",
                          "These control the display of data")
        display.add_option("-r", "--reverse", action="store_true", 
                          dest="reverse", help="Sort from newest to oldest")
        display.add_option("-s", "--summary", action="store_true", 
                          dest="summary", help="Show patchlog summary")
        display.add_option("-D", "--date", action="store_true", 
                          dest="date", help="Show patchlog date")
        display.add_option("-c", "--creator", action="store_true", 
                          dest="creator", help="Show the id that committed the"
                          " revision")
        display.add_option("-m", "--merges", action="store_true", 
                          dest="merges", help="Show the revisions that were"
                          " merged")
        parser.add_option_group(display)
        return parser 
    def help(self, parser=None):
        """Attempt to explain the revisions command
        
        :param parser: If supplied, used to determine options
        """
        if parser==None:
            parser=self.get_parser()
        parser.print_help()
        print """List revisions.
        """
        help_tree_spec()


class Get(BaseCommand):
    """
    Retrieve a revision from the archive
    """
    def __init__(self):
        self.description="Retrieve a revision from the archive"
        self.parser=self.get_parser()


    def get_completer(self, arg, index):
        if index > 0:
            return None
        try:
            tree = arch.tree_root()
        except:
            tree = None
        return cmdutil.iter_revision_completions(arg, tree)


    def do_command(self, cmdargs):
        """
        Master function that perfoms the "get" command.
        """
        (options, args) = self.parser.parse_args(cmdargs)
        if len(args) < 1:
            return self.help()            
        try:
            tree = arch.tree_root()
        except arch.errors.TreeRootError:
            tree = None
        
        arch_loc = None
        try:
            revision, arch_loc = paths.full_path_decode(args[0])
        except Exception, e:
            revision = cmdutil.determine_revision_arch(tree, args[0], 
                check_existence=False, allow_package=True)
        if len(args) > 1:
            directory = args[1]
        else:
            directory = str(revision.nonarch)
        if os.path.exists(directory):
            raise DirectoryExists(directory)
        cmdutil.ensure_archive_registered(revision.archive, arch_loc)
        try:
            cmdutil.ensure_revision_exists(revision)
        except cmdutil.NoSuchRevision, e:
            raise CommandFailedWrapper(e)

        link = cmdutil.prompt ("get link")
        for line in cmdutil.iter_get(revision, directory, link,
                                     options.no_pristine,
                                     options.no_greedy_add):
            cmdutil.colorize(line)

    def get_parser(self):
        """
        Returns the options parser to use for the "get" command.

        :rtype: cmdutil.CmdOptionParser
        """
        parser=cmdutil.CmdOptionParser("fai get revision [dir]")
        parser.add_option("--no-pristine", action="store_true", 
                         dest="no_pristine", 
                         help="Do not make pristine copy for reference")
        parser.add_option("--no-greedy-add", action="store_true", 
                         dest="no_greedy_add", 
                         help="Never add to greedy libraries")

        return parser 

    def help(self, parser=None):
        """
        Prints a help message.

        :param parser: If supplied, the parser to use for generating help.  If \
        not supplied, it is retrieved.
        :type parser: cmdutil.CmdOptionParser
        """
        if parser==None:
            parser=self.get_parser()
        parser.print_help()
        print """
Expands aliases and constructs a project tree for a revision.  If the optional
"dir" argument is provided, the project tree will be stored in this directory.
        """
        help_tree_spec()
        return

class PromptCmd(cmd.Cmd):
    def __init__(self):
        cmd.Cmd.__init__(self)
        self.prompt = "Fai> "
        try:
            self.tree = arch.tree_root()
        except:
            self.tree = None
        self.set_title()
        self.set_prompt()
        self.fake_aba = abacmds.AbaCmds()
        self.identchars += '-'
        self.history_file = os.path.expanduser("~/.fai-history")
        readline.set_completer_delims(string.whitespace)
        if os.access(self.history_file, os.R_OK) and \
            os.path.isfile(self.history_file):
            readline.read_history_file(self.history_file)

    def write_history(self):
        readline.write_history_file(self.history_file)

    def do_quit(self, args):
        self.write_history()
        sys.exit(0)

    def do_exit(self, args):
        self.do_quit(args)

    def do_EOF(self, args):
        print
        self.do_quit(args)

    def postcmd(self, line, bar):
        self.set_title()
        self.set_prompt()

    def set_prompt(self):
        if self.tree is not None:
            try:
                version = " "+self.tree.tree_version.nonarch
            except:
                version = ""
        else:
            version = ""
        self.prompt = "Fai%s> " % version

    def set_title(self, command=None):
        try:
            version = self.tree.tree_version.nonarch
        except:
            version = "[no version]"
        if command is None:
            command = ""
        sys.stdout.write(terminal.term_title("Fai %s %s" % (command, version)))

    def do_cd(self, line):
        if line == "":
            line = "~"
        try:
            os.chdir(os.path.expanduser(line))
        except Exception, e:
            print e
        try:
            self.tree = arch.tree_root()
        except:
            self.tree = None

    def do_help(self, line):
        Help()(line)

    def default(self, line):
        args = line.split()
        if find_command(args[0]):
            try:
                find_command(args[0]).do_command(args[1:])
            except cmdutil.BadCommandOption, e:
                print e
            except cmdutil.GetHelp, e:
                find_command(args[0]).help()
            except CommandFailed, e:
                print e
            except arch.errors.ArchiveNotRegistered, e:
                print e
            except KeyboardInterrupt, e:
                print "Interrupted"
            except arch.util.ExecProblem, e:
                print e.proc.error.rstrip('\n')
            except cmdutil.CantDetermineVersion, e:
                print e
            except cmdutil.CantDetermineRevision, e:
                print e
            except Exception, e:
                print "Unhandled error:\n%s" % cmdutil.exception_str(e)

        elif suggestions.has_key(args[0]):
            print suggestions[args[0]]

        elif self.fake_aba.is_command(args[0]):
            tree = None
            try:
                tree = arch.tree_root()
            except arch.errors.TreeRootError:
                pass
            cmd = self.fake_aba.is_command(args[0])
            try:
                cmd.run(cmdutil.expand_prefix_alias(args[1:], tree))
            except KeyboardInterrupt, e:
                print "Interrupted"

        elif options.tla_fallthrough and args[0] != "rm" and \
            cmdutil.is_tla_command(args[0]):
            try:
                tree = None
                try:
                    tree = arch.tree_root()
                except arch.errors.TreeRootError:
                    pass
                args = cmdutil.expand_prefix_alias(args, tree)
                arch.util.exec_safe('tla', args, stderr=sys.stderr,
                expected=(0, 1))
            except arch.util.ExecProblem, e:
                pass
            except KeyboardInterrupt, e:
                print "Interrupted"
        else:
            try:
                try:
                    tree = arch.tree_root()
                except arch.errors.TreeRootError:
                    tree = None
                args=line.split()
                os.system(" ".join(cmdutil.expand_prefix_alias(args, tree)))
            except KeyboardInterrupt, e:
                print "Interrupted"

    def completenames(self, text, line, begidx, endidx):
        completions = []
        iter = iter_command_names(self.fake_aba)
        try:
            if len(line) > 0:
                arg = line.split()[-1]
            else:
                arg = ""
            iter = iter_munged_completions(iter, arg, text)
        except Exception, e:
            print e
        return list(iter)

    def completedefault(self, text, line, begidx, endidx):
        """Perform completion for native commands.
        
        :param text: The text to complete
        :type text: str
        :param line: The entire line to complete
        :type line: str
        :param begidx: The start of the text in the line
        :type begidx: int
        :param endidx: The end of the text in the line
        :type endidx: int
        """
        try:
            (cmd, args, foo) = self.parseline(line)
            command_obj=find_command(cmd)
            if command_obj is not None:
                return command_obj.complete(args.split(), text)
            elif not self.fake_aba.is_command(cmd) and \
                cmdutil.is_tla_command(cmd):
                iter = cmdutil.iter_supported_switches(cmd)
                if len(args) > 0:
                    arg = args.split()[-1]
                else:
                    arg = ""
                if arg.startswith("-"):
                    return list(iter_munged_completions(iter, arg, text))
                else:
                    return list(iter_munged_completions(
                        iter_file_completions(arg), arg, text))


            elif cmd == "cd":
                if len(args) > 0:
                    arg = args.split()[-1]
                else:
                    arg = ""
                iter = iter_dir_completions(arg)
                iter = iter_munged_completions(iter, arg, text)
                return list(iter)
            elif len(args)>0:
                arg = args.split()[-1]
                return list(iter_munged_completions(iter_file_completions(arg),
                                                    arg, text))
            else:
                return self.completenames(text, line, begidx, endidx)
        except Exception, e:
            print e


def iter_command_names(fake_aba):
    for entry in cmdutil.iter_combine([commands.iterkeys(), 
                                     fake_aba.get_commands(), 
                                     cmdutil.iter_tla_commands(False)]):
        if not suggestions.has_key(str(entry)):
            yield entry


def iter_file_completions(arg, only_dirs = False):
    """Generate an iterator that iterates through filename completions.

    :param arg: The filename fragment to match
    :type arg: str
    :param only_dirs: If true, match only directories
    :type only_dirs: bool
    """
    cwd = os.getcwd()
    if cwd != "/":
        extras = [".", ".."]
    else:
        extras = []
    (dir, file) = os.path.split(arg)
    if dir != "":
        listingdir = os.path.expanduser(dir)
    else:
        listingdir = cwd
    for file in cmdutil.iter_combine([os.listdir(listingdir), extras]):
        if dir != "":
            userfile = dir+'/'+file
        else:
            userfile = file
        if userfile.startswith(arg):
            if os.path.isdir(listingdir+'/'+file):
                userfile+='/'
                yield userfile
            elif not only_dirs:
                yield userfile

def iter_munged_completions(iter, arg, text):
    for completion in iter:
        completion = str(completion)
        if completion.startswith(arg):
            yield completion[len(arg)-len(text):]

def iter_source_file_completions(tree, arg):
    treepath = cmdutil.tree_cwd(tree)
    if len(treepath) > 0:
        dirs = [treepath]
    else:
        dirs = None
    for file in tree.iter_inventory(dirs, source=True, both=True):
        file = file_completion_match(file, treepath, arg)
        if file is not None:
            yield file


def iter_untagged(tree, dirs):
    for file in arch_core.iter_inventory_filter(tree, dirs, tagged=False, 
                                                categories=arch_core.non_root,
                                                control_files=True):
        yield file.name 


def iter_untagged_completions(tree, arg):
    """Generate an iterator for all visible untagged files that match arg.

    :param tree: The tree to look for untagged files in
    :type tree: `arch.WorkingTree`
    :param arg: The argument to match
    :type arg: str
    :return: An iterator of all matching untagged files
    :rtype: iterator of str
    """
    treepath = cmdutil.tree_cwd(tree)
    if len(treepath) > 0:
        dirs = [treepath]
    else:
        dirs = None

    for file in iter_untagged(tree, dirs):
        file = file_completion_match(file, treepath, arg)
        if file is not None:
            yield file


def file_completion_match(file, treepath, arg):
    """Determines whether a file within an arch tree matches the argument.

    :param file: The rooted filename
    :type file: str
    :param treepath: The path to the cwd within the tree
    :type treepath: str
    :param arg: The prefix to match
    :return: The completion name, or None if not a match
    :rtype: str
    """
    if not file.startswith(treepath):
        return None
    if treepath != "":
        file = file[len(treepath)+1:]

    if not file.startswith(arg):
        return None 
    if os.path.isdir(file):
        file += '/'
    return file

def iter_modified_file_completions(tree, arg):
    """Returns a list of modified files that match the specified prefix.

    :param tree: The current tree
    :type tree: `arch.WorkingTree`
    :param arg: The prefix to match
    :type arg: str
    """
    treepath = cmdutil.tree_cwd(tree)
    tmpdir = cmdutil.tmpdir()
    changeset = tmpdir+"/changeset"
    completions = []
    revision = cmdutil.determine_revision_tree(tree)
    for line in arch.iter_delta(revision, tree, changeset):
        if isinstance(line, arch.FileModification):
            file = file_completion_match(line.name[1:], treepath, arg)
            if file is not None:
                completions.append(file)
    shutil.rmtree(tmpdir)
    return completions

def iter_dir_completions(arg):
    """Generate an iterator that iterates through directory name completions.

    :param arg: The directory name fragment to match
    :type arg: str
    """
    return iter_file_completions(arg, True)

class Shell(BaseCommand):
    def __init__(self):
        self.description = "Runs Fai as a shell"

    def do_command(self, cmdargs):
        if len(cmdargs)!=0:
            raise cmdutil.GetHelp
        prompt = PromptCmd()
        try:
            prompt.cmdloop()
        finally:
            prompt.write_history()

class AddID(BaseCommand):
    """
    Adds an inventory id for the given file
    """
    def __init__(self):
        self.description="Add an inventory id for a given file"

    def get_completer(self, arg, index):
        tree = arch.tree_root()
        return iter_untagged_completions(tree, arg)

    def do_command(self, cmdargs):
        """
        Master function that perfoms the "revision" command.
        """
        parser=self.get_parser()
        (options, args) = parser.parse_args(cmdargs)

        tree = arch.tree_root()

        if (len(args) == 0) == (options.untagged == False):
            raise cmdutil.GetHelp

       #if options.id and len(args) != 1:
       #    print "If --id is specified, only one file can be named."
       #    return
        
        method = tree.tagging_method
        
        if options.id_type == "tagline":
            if method != "tagline":
                if not cmdutil.prompt("Tagline in other tree"):
                    if method == "explicit":
                        options.id_type == explicit
                    else:
                        print "add-id not supported for \"%s\" tagging method"\
                            % method 
                        return
        
        elif options.id_type == "explicit":
            if method != "tagline" and method != explicit:
                if not prompt("Explicit in other tree"):
                    print "add-id not supported for \"%s\" tagging method" % \
                        method
                    return
        
        if options.id_type == "auto":
            if method != "tagline" and method != "explicit":
                print "add-id not supported for \"%s\" tagging method" % method
                return
            else:
                options.id_type = method
        if options.untagged:
            args = None
        self.add_ids(tree, options.id_type, args)

    def add_ids(self, tree, id_type, files=()):
        """Add inventory ids to files.
        
        :param tree: the tree the files are in
        :type tree: `arch.WorkingTree`
        :param id_type: the type of id to add: "explicit" or "tagline"
        :type id_type: str
        :param files: The list of files to add.  If None do all untagged.
        :type files: tuple of str
        """

        untagged = (files is None)
        if untagged:
            files = list(iter_untagged(tree, None))
        previous_files = []
        while len(files) > 0:
            previous_files.extend(files)
            if id_type == "explicit":
                cmdutil.add_id(files)
            elif id_type == "tagline":
                for file in files:
                    try:
                        cmdutil.add_tagline_or_explicit_id(file)
                    except cmdutil.AlreadyTagged:
                        print "\"%s\" already has a tagline." % file
                    except cmdutil.NoCommentSyntax:
                        pass
            #do inventory after tagging until no untagged files are encountered
            if untagged:
                files = []
                for file in iter_untagged(tree, None):
                    if not file in previous_files:
                        files.append(file)

            else:
                break

    def get_parser(self):
        """
        Returns the options parser to use for the "revision" command.

        :rtype: cmdutil.CmdOptionParser
        """
        parser=cmdutil.CmdOptionParser("fai add-id file1 [file2] [file3]...")
# ddaa suggests removing this to promote GUIDs.  Let's see who squalks.
#        parser.add_option("-i", "--id", dest="id", 
#                         help="Specify id for a single file", default=None)
        parser.add_option("--tltl", action="store_true", 
                         dest="lord_style",  help="Use Tom Lord's style of id.")
        parser.add_option("--explicit", action="store_const", 
                         const="explicit", dest="id_type", 
                         help="Use an explicit id", default="auto")
        parser.add_option("--tagline", action="store_const", 
                         const="tagline", dest="id_type", 
                         help="Use a tagline id")
        parser.add_option("--untagged", action="store_true", 
                         dest="untagged", default=False, 
                         help="tag all untagged files")
        return parser 

    def help(self, parser=None):
        """
        Prints a help message.

        :param parser: If supplied, the parser to use for generating help.  If \
        not supplied, it is retrieved.
        :type parser: cmdutil.CmdOptionParser
        """
        if parser==None:
            parser=self.get_parser()
        parser.print_help()
        print """
Adds an inventory to the specified file(s) and directories.  If --untagged is
specified, adds inventory to all untagged files and directories.
        """
        return


class Merge(BaseCommand):
    """
    Merges changes from other versions into the current tree
    """
    def __init__(self):
        self.description="Merges changes from other versions"
        try:
            self.tree = arch.tree_root()
        except:
            self.tree = None


    def get_completer(self, arg, index):
        if self.tree is None:
            raise arch.errors.TreeRootError
        completions = list(ancillary.iter_partners(self.tree, 
                                                   self.tree.tree_version))
        if len(completions) == 0:
            completions = list(self.tree.iter_log_versions())

        aliases = []
        try:
            for completion in completions:
                alias = ancillary.compact_alias(str(completion), self.tree)
                if alias:
                    aliases.extend(alias)

            for completion in completions:
                if completion.archive == self.tree.tree_version.archive:
                    aliases.append(completion.nonarch)

        except Exception, e:
            print e
            
        completions.extend(aliases)
        return completions

    def do_command(self, cmdargs):
        """
        Master function that perfoms the "merge" command.
        """
        parser=self.get_parser()
        (options, args) = parser.parse_args(cmdargs)
        if options.diff3:
            action="star-merge"
        else:
            action = options.action
        
        if self.tree is None:
            raise arch.errors.TreeRootError(os.getcwd())
        if cmdutil.has_changed(self.tree.tree_version):
            raise UncommittedChanges(self.tree)

        if len(args) > 0:
            revisions = []
            for arg in args:
                revisions.append(cmdutil.determine_revision_arch(self.tree, 
                                                                 arg))
            source = "from commandline"
        else:
            revisions = ancillary.iter_partner_revisions(self.tree, 
                                                         self.tree.tree_version)
            source = "from partner version"
        revisions = misc.rewind_iterator(revisions)
        try:
            revisions.next()
            revisions.rewind()
        except StopIteration, e:
            revision = cmdutil.tag_cur(self.tree)
            if revision is None:
                raise CantDetermineRevision("", "No version specified, no "
                                            "partner-versions, and no tag"
                                            " source")
            revisions = [revision]
            source = "from tag source"
        for revision in revisions:
            cmdutil.ensure_archive_registered(revision.archive)
            cmdutil.colorize(arch.Chatter("* Merging %s [%s]" % 
                             (revision, source)))
            if action=="native-merge" or action=="update":
                if self.native_merge(revision, action) == 0:
                    continue
            elif action=="star-merge":
                try: 
                    self.star_merge(revision, options.diff3)
                except errors.MergeProblem, e:
                    break
            if cmdutil.has_changed(self.tree.tree_version):
                break

    def star_merge(self, revision, diff3):
        """Perform a star-merge on the current tree.
        
        :param revision: The revision to use for the merge
        :type revision: `arch.Revision`
        :param diff3: If true, do a diff3 merge
        :type diff3: bool
        """
        try:
            for line in self.tree.iter_star_merge(revision, diff3=diff3):
                cmdutil.colorize(line)
        except arch.util.ExecProblem, e:
            if e.proc.status is not None and e.proc.status == 1:
                if e.proc.error:
                    print e.proc.error
                raise MergeProblem
            else:
                raise

    def native_merge(self, other_revision, action):
        """Perform a native-merge on the current tree.
        
        :param other_revision: The revision to use for the merge
        :type other_revision: `arch.Revision`
        :return: 0 if the merge was skipped, 1 if it was applied
        """
        other_tree = cmdutil.find_or_make_local_revision(other_revision)
        try:
            if action == "native-merge":
                ancestor = cmdutil.merge_ancestor2(self.tree, other_tree, 
                                                   other_revision)
            elif action == "update":
                ancestor = cmdutil.tree_latest(self.tree, 
                                               other_revision.version)
        except CantDetermineRevision, e:
            raise CommandFailedWrapper(e)
        cmdutil.colorize(arch.Chatter("* Found common ancestor %s" % ancestor))
        if (ancestor == other_revision):
            cmdutil.colorize(arch.Chatter("* Skipping redundant merge" 
                                          % ancestor))
            return 0
        delta = cmdutil.apply_delta(ancestor, other_tree, self.tree)    
        for line in cmdutil.iter_apply_delta_filter(delta):
            cmdutil.colorize(line)
        return 1



    def get_parser(self):
        """
        Returns the options parser to use for the "merge" command.

        :rtype: cmdutil.CmdOptionParser
        """
        parser=cmdutil.CmdOptionParser("fai merge [VERSION]")
        parser.add_option("-s", "--star-merge", action="store_const",
                          dest="action", help="Use star-merge",
                          const="star-merge", default="native-merge")
        parser.add_option("--update", action="store_const",
                          dest="action", help="Use update picker",
                          const="update")
        parser.add_option("--diff3", action="store_true", 
                         dest="diff3",  
                         help="Use diff3 for merge (implies star-merge)")
        return parser 

    def help(self, parser=None):
        """
        Prints a help message.

        :param parser: If supplied, the parser to use for generating help.  If \
        not supplied, it is retrieved.
        :type parser: cmdutil.CmdOptionParser
        """
        if parser==None:
            parser=self.get_parser()
        parser.print_help()
        print """
Performs a merge operation using the specified version.
        """
        return

class ELog(BaseCommand):
    """
    Produces a raw patchlog and invokes the user's editor
    """
    def __init__(self):
        self.description="Edit a patchlog to commit"
        try:
            self.tree = arch.tree_root()
        except:
            self.tree = None


    def do_command(self, cmdargs):
        """
        Master function that perfoms the "elog" command.
        """
        parser=self.get_parser()
        (options, args) = parser.parse_args(cmdargs)
        if self.tree is None:
            raise arch.errors.TreeRootError

        edit_log(self.tree)

    def get_parser(self):
        """
        Returns the options parser to use for the "merge" command.

        :rtype: cmdutil.CmdOptionParser
        """
        parser=cmdutil.CmdOptionParser("fai elog")
        return parser 


    def help(self, parser=None):
        """
        Invokes $EDITOR to produce a log for committing.

        :param parser: If supplied, the parser to use for generating help.  If \
        not supplied, it is retrieved.
        :type parser: cmdutil.CmdOptionParser
        """
        if parser==None:
            parser=self.get_parser()
        parser.print_help()
        print """
Invokes $EDITOR to produce a log for committing.
        """
        return

def edit_log(tree):
    """Makes and edits the log for a tree.  Does all kinds of fancy things
    like log templates and merge summaries and log-for-merge
    
    :param tree: The tree to edit the log for
    :type tree: `arch.WorkingTree`
    """
    #ensure we have an editor before preparing the log
    cmdutil.find_editor()
    log = tree.log_message(create=False)
    log_is_new = False
    if log is None or cmdutil.prompt("Overwrite log"):
        if log is not None:
           os.remove(log.name)
        log = tree.log_message(create=True)
        log_is_new = True
        tmplog = log.name
        template = tree+"/{arch}/=log-template"
        if not os.path.exists(template):
            template = os.path.expanduser("~/.arch-params/=log-template")
            if not os.path.exists(template):
                template = None
        if template:
            shutil.copyfile(template, tmplog)
        
        new_merges = list(cmdutil.iter_new_merges(tree, 
                                                  tree.tree_version))
        log["Summary"] = merge_summary(new_merges, tree.tree_version)
        if len(new_merges) > 0:   
            if cmdutil.prompt("Log for merge"):
                mergestuff = cmdutil.log_for_merge(tree)
                log.description += mergestuff
        log.save()
    try:
        cmdutil.invoke_editor(log.name)
    except:
        if log_is_new:
            os.remove(log.name)
        raise

def merge_summary(new_merges, tree_version):
    if len(new_merges) == 0:
        return ""
    if len(new_merges) == 1:
        summary = new_merges[0].summary
    else:
        summary = "Merge"

    credits = []
    for merge in new_merges:
        if arch.my_id() != merge.creator:
            name = re.sub("<.*>", "", merge.creator).rstrip(" ");
            if not name in credits:
                credits.append(name)
        else:
            version = merge.revision.version
            if version.archive == tree_version.archive:
                if not version.nonarch in credits:
                    credits.append(version.nonarch)
            elif not str(version) in credits:
                credits.append(str(version))

    return ("%s (%s)") % (summary, ", ".join(credits))

class MirrorArchive(BaseCommand):
    """
    Updates a mirror from an archive
    """
    def __init__(self):
        self.description="Update a mirror from an archive"

    def do_command(self, cmdargs):
        """
        Master function that perfoms the "revision" command.
        """

        parser=self.get_parser()
        (options, args) = parser.parse_args(cmdargs)
        if len(args) > 1:
            raise GetHelp
        try:
            tree = arch.tree_root()
        except:
            tree = None

        if len(args) == 0:
            if tree is not None:
                name = tree.tree_version()
        else:
            name = cmdutil.expand_alias(args[0], tree)
            name = arch.NameParser(name)

        to_arch = name.get_archive()
        from_arch = cmdutil.get_mirror_source(arch.Archive(to_arch))
        limit = name.get_nonarch()

        iter = arch_core.mirror_archive(from_arch,to_arch, limit)
        for line in arch.chatter_classifier(iter):
            cmdutil.colorize(line)

    def get_parser(self):
        """
        Returns the options parser to use for the "revision" command.

        :rtype: cmdutil.CmdOptionParser
        """
        parser=cmdutil.CmdOptionParser("fai mirror-archive ARCHIVE")
        return parser 

    def help(self, parser=None):
        """
        Prints a help message.

        :param parser: If supplied, the parser to use for generating help.  If \
        not supplied, it is retrieved.
        :type parser: cmdutil.CmdOptionParser
        """
        if parser==None:
            parser=self.get_parser()
        parser.print_help()
        print """
Updates a mirror from an archive.  If a branch, package, or version is
supplied, only changes under it are mirrored.
        """
        return

def help_tree_spec():
    print """Specifying revisions (default: tree)
Revisions may be specified by alias, revision, version or patchlevel.
Revisions or versions may be fully qualified.  Unqualified revisions, versions, 
or patchlevels use the archive of the current project tree.  Versions will
use the latest patchlevel in the tree.  Patchlevels will use the current tree-
version.

Use "alias" to list available (user and automatic) aliases."""

def help_aliases(tree):
    print """Auto-generated aliases
 acur : The latest revision in the archive of the tree-version.  You can specfy
        a different version like so: acur:foo--bar--0 (aliases can be used)
 tcur : (tree current) The latest revision in the tree of the tree-version.
        You can specify a different version like so: tcur:foo--bar--0 (aliases
        can be used).
tprev : (tree previous) The previous revision in the tree of the tree-version.
        To specify an older revision, use a number, e.g. "tprev:4"
 tanc : (tree ancestor) The ancestor revision of the tree
        To specify an older revision, use a number, e.g. "tanc:4"
tdate : (tree date) The latest revision from a given date (e.g. "tdate:July 6")
 tmod : (tree modified) The latest revision to modify a given file 
        (e.g. "tmod:engine.cpp" or "tmod:engine.cpp:16")
 ttag : (tree tag) The revision that was tagged into the current tree revision,
        according to the tree.
tagcur: (tag current) The latest revision of the version that the current tree
        was tagged from.
mergeanc : The common ancestor of the current tree and the specified revision.
        Defaults to the first partner-version's latest revision or to tagcur.
   """
    print "User aliases"
    for parts in ancillary.iter_all_alias(tree):
        print parts[0].rjust(10)+" : "+parts[1]


class Inventory(BaseCommand):
    """List the status of files in the tree"""
    def __init__(self):
        self.description=self.__doc__

    def do_command(self, cmdargs):
        """
        Master function that perfoms the "revision" command.
        """

        parser=self.get_parser()
        (options, args) = parser.parse_args(cmdargs)
        tree = arch.tree_root()
        categories = []

        if (options.source):
            categories.append(arch_core.SourceFile)
        if (options.precious):
            categories.append(arch_core.PreciousFile)
        if (options.backup):
            categories.append(arch_core.BackupFile)
        if (options.junk):
            categories.append(arch_core.JunkFile)

        if len(categories) == 1:
            show_leading = False
        else:
            show_leading = True

        if len(categories) == 0:
            categories = None

        if options.untagged:
            categories = arch_core.non_root
            show_leading = False
            tagged = False
        else:
            tagged = None
        
        for file in arch_core.iter_inventory_filter(tree, None, 
            control_files=options.control_files, 
            categories = categories, tagged=tagged):
            print arch_core.file_line(file, 
                                      category = show_leading, 
                                      untagged = show_leading,
                                      id = options.ids)

    def get_parser(self):
        """
        Returns the options parser to use for the "revision" command.

        :rtype: cmdutil.CmdOptionParser
        """
        parser=cmdutil.CmdOptionParser("fai inventory [options]")
        parser.add_option("--ids", action="store_true", dest="ids", 
                          help="Show file ids")
        parser.add_option("--control", action="store_true", 
                          dest="control_files", help="include control files")
        parser.add_option("--source", action="store_true", dest="source",
                          help="List source files")
        parser.add_option("--backup", action="store_true", dest="backup",
                          help="List backup files")
        parser.add_option("--precious", action="store_true", dest="precious",
                          help="List precious files")
        parser.add_option("--junk", action="store_true", dest="junk",
                          help="List junk files")
        parser.add_option("--unrecognized", action="store_true", 
                          dest="unrecognized", help="List unrecognized files")
        parser.add_option("--untagged", action="store_true", 
                          dest="untagged", help="List only untagged files")
        return parser 

    def help(self, parser=None):
        """
        Prints a help message.

        :param parser: If supplied, the parser to use for generating help.  If \
        not supplied, it is retrieved.
        :type parser: cmdutil.CmdOptionParser
        """
        if parser==None:
            parser=self.get_parser()
        parser.print_help()
        print """
Lists the status of files in the archive:
S source
P precious
B backup
J junk
U unrecognized
T tree root
? untagged-source
Leading letter are not displayed if only one kind of file is shown
        """
        return


class Alias(BaseCommand):
    """List or adjust aliases"""
    def __init__(self):
        self.description=self.__doc__

    def get_completer(self, arg, index):
        if index > 2:
            return ()
        try:
            self.tree = arch.tree_root()
        except:
            self.tree = None

        if index == 0:
            return [part[0]+" " for part in ancillary.iter_all_alias(self.tree)]
        elif index == 1:
            return cmdutil.iter_revision_completions(arg, self.tree)


    def do_command(self, cmdargs):
        """
        Master function that perfoms the "revision" command.
        """

        parser=self.get_parser()
        (options, args) = parser.parse_args(cmdargs)
        try:
            self.tree =  arch.tree_root()
        except:
            self.tree = None


        try:
            options.action(args, options)
        except cmdutil.ForbiddenAliasSyntax, e:
            raise CommandFailedWrapper(e)

    def arg_dispatch(self, args, options):
        """Add, modify, or list aliases, depending on number of arguments

        :param args: The list of commandline arguments
        :type args: list of str
        :param options: The commandline options
        """
        if len(args) == 0:
            help_aliases(self.tree)
            return
        elif len(args) == 1:
            self.print_alias(args[0])
        elif (len(args)) == 2:
            self.add(args[0], args[1], options)
        else:
            raise cmdutil.GetHelp

    def print_alias(self, alias):
        answer = None
        for pair in ancillary.iter_all_alias(self.tree):
            if pair[0] == alias:
                answer = pair[1]
        if answer is not None:
            print answer
        else:
            print "The alias %s is not assigned." % alias

    def add(self, alias, expansion, options):
        """Add or modify aliases

        :param alias: The alias name to create/modify
        :type alias: str
        :param expansion: The expansion to assign to the alias name
        :type expansion: str
        :param options: The commandline options
        """
        newlist = ""
        written = False
        new_line = "%s=%s\n" % (alias, cmdutil.expand_alias(expansion, 
            self.tree))
        ancillary.check_alias(new_line.rstrip("\n"), [alias, expansion])

        for pair in self.get_iterator(options):
            if pair[0] != alias:
                newlist+="%s=%s\n" % (pair[0], pair[1])
            elif not written:
                newlist+=new_line
                written = True
        if not written:
            newlist+=new_line
        self.write_aliases(newlist, options)
            
    def delete(self, args, options):
        """Delete the specified alias

        :param args: The list of arguments
        :type args: list of str
        :param options: The commandline options
        """
        deleted = False
        if len(args) != 1:
            raise cmdutil.GetHelp
        newlist = ""
        for pair in self.get_iterator(options):
            if pair[0] != args[0]:
                newlist+="%s=%s\n" % (pair[0], pair[1])
            else:
                deleted = True
        if not deleted:
            raise errors.NoSuchAlias(args[0])
        self.write_aliases(newlist, options)

    def get_alias_file(self, options):
        """Return the name of the alias file to use

        :param options: The commandline options
        """
        if options.tree:
            if self.tree is None:
                self.tree == arch.tree_root()
            return str(self.tree)+"/{arch}/+aliases"
        else:
            return "~/.aba/aliases"

    def get_iterator(self, options):
        """Return the alias iterator to use

        :param options: The commandline options
        """
        return ancillary.iter_alias(self.get_alias_file(options))

    def write_aliases(self, newlist, options):
        """Safely rewrite the alias file
        :param newlist: The new list of aliases
        :type newlist: str
        :param options: The commandline options
        """
        filename = os.path.expanduser(self.get_alias_file(options))
        file = cmdutil.NewFileVersion(filename)
        file.write(newlist)
        file.commit()


    def get_parser(self):
        """
        Returns the options parser to use for the "alias" command.

        :rtype: cmdutil.CmdOptionParser
        """
        parser=cmdutil.CmdOptionParser("fai alias [ALIAS] [NAME]")
        parser.add_option("-d", "--delete", action="store_const", dest="action",
                          const=self.delete, default=self.arg_dispatch, 
                          help="Delete an alias")
        parser.add_option("--tree", action="store_true", dest="tree", 
                          help="Create a per-tree alias", default=False)
        return parser 

    def help(self, parser=None):
        """
        Prints a help message.

        :param parser: If supplied, the parser to use for generating help.  If \
        not supplied, it is retrieved.
        :type parser: cmdutil.CmdOptionParser
        """
        if parser==None:
            parser=self.get_parser()
        parser.print_help()
        print """
Lists current aliases or modifies the list of aliases.

If no arguments are supplied, aliases will be listed.  If two arguments are
supplied, the specified alias will be created or modified.  If -d or --delete
is supplied, the specified alias will be deleted.

You can create aliases that refer to any fully-qualified part of the
Arch namespace, e.g. 
archive, 
archive/category, 
archive/category--branch, 
archive/category--branch--version (my favourite)
archive/category--branch--version--patchlevel

Aliases can be used automatically by native commands.  To use them
with external or tla commands, prefix them with ^ (you can do this
with native commands, too).
"""


class RequestMerge(BaseCommand):
    """Submit a merge request to Bug Goo"""
    def __init__(self):
        self.description=self.__doc__

    def do_command(self, cmdargs):
        """Submit a merge request

        :param cmdargs: The commandline arguments
        :type cmdargs: list of str
        """
        cmdutil.find_editor()
        parser = self.get_parser()
        (options, args) = parser.parse_args(cmdargs)
        try:
            self.tree=arch.tree_root()
        except:
            self.tree=None
        base, revisions = self.revision_specs(args)
        message = self.make_headers(base, revisions)
        message += self.make_summary(revisions)
        path = self.edit_message(message)
        message = self.tidy_message(path)
        if cmdutil.prompt("Send merge"):
            self.send_message(message)
            print "Merge request sent"

    def make_headers(self, base, revisions):
        """Produce email and Bug Goo header strings

        :param base: The base revision to apply merges to
        :type base: `arch.Revision`
        :param revisions: The revisions to replay into the base
        :type revisions: list of `arch.Patchlog`
        :return: The headers
        :rtype: str
        """
        headers = "To: gnu-arch-users@gnu.org\n"
        headers += "From: %s\n" % options.fromaddr
        if len(revisions) == 1:
            headers += "Subject: [MERGE REQUEST] %s\n" % revisions[0].summary
        else:
            headers += "Subject: [MERGE REQUEST]\n"
        headers += "\n"
        headers += "Base-Revision: %s\n" % base
        for revision in revisions:
            headers += "Revision: %s\n" % revision.revision
        headers += "Bug: \n\n"
        return headers

    def make_summary(self, logs):
        """Generate a summary of merges

        :param logs: the patchlogs that were directly added by the merges
        :type logs: list of `arch.Patchlog`
        :return: the summary
        :rtype: str
        """ 
        summary = ""
        for log in logs:
            summary+=str(log.revision)+"\n"
            summary+=log.summary+"\n"
            if log.description.strip():
                summary+=log.description.strip('\n')+"\n\n"
        return summary

    def revision_specs(self, args):
        """Determine the base and merge revisions from tree and arguments.

        :param args: The parsed arguments
        :type args: list of str
        :return: The base revision and merge revisions 
        :rtype: `arch.Revision`, list of `arch.Patchlog`
        """
        if len(args) > 0:
            target_revision = cmdutil.determine_revision_arch(self.tree, 
                                                              args[0])
        else:
            target_revision = cmdutil.tree_latest(self.tree)
        if len(args) > 1:
            merges = [ arch.Patchlog(cmdutil.determine_revision_arch(
                       self.tree, f)) for f in args[1:] ]
        else:
            if self.tree is None:
                raise CantDetermineRevision("", "Not in a project tree")
            merge_iter = cmdutil.iter_new_merges(self.tree, 
                                                 target_revision.version, 
                                                 False)
            merges = [f for f in cmdutil.direct_merges(merge_iter)]
        return (target_revision, merges)

    def edit_message(self, message):
        """Edit an email message in the user's standard editor

        :param message: The message to edit
        :type message: str
        :return: the path of the edited message
        :rtype: str
        """
        if self.tree is None:
            path = os.get_cwd()
        else:
            path = self.tree
        path += "/,merge-request"
        file = open(path, 'w')
        file.write(message)
        file.flush()
        cmdutil.invoke_editor(path)
        return path

    def tidy_message(self, path):
        """Validate and clean up message.

        :param path: The path to the message to clean up
        :type path: str
        :return: The parsed message
        :rtype: `email.Message`
        """
        mail = email.message_from_file(open(path))
        if mail["Subject"].strip() == "[MERGE REQUEST]":
            raise BlandSubject
        
        request = email.message_from_string(mail.get_payload())
        if request.has_key("Bug"):
            if request["Bug"].strip()=="":
                del request["Bug"]
        mail.set_payload(request.as_string())
        return mail

    def send_message(self, message):
        """Send a message, using its headers to address it.

        :param message: The message to send
        :type message: `email.Message`"""
        server = smtplib.SMTP()
        server.sendmail(message['From'], message['To'], message.as_string())
        server.quit()

    def help(self, parser=None):
        """Print a usage message

        :param parser: The options parser to use
        :type parser: `cmdutil.CmdOptionParser`
        """
        if parser is None:
            parser = self.get_parser()
        parser.print_help()
        print """
Sends a merge request formatted for Bug Goo.  Intended use: get the tree
you'd like to merge into.  Apply the merges you want.  Invoke request-merge.
The merge request will open in your $EDITOR.

When no TARGET is specified, it uses the current tree revision.  When
no MERGE is specified, it uses the direct merges (as in "revisions
--direct-merges").  But you can specify just the TARGET, or all the MERGE
revisions.
"""

    def get_parser(self):
        """Produce a commandline parser for this command.

        :rtype: `cmdutil.CmdOptionParser`
        """
        parser=cmdutil.CmdOptionParser("request-merge [TARGET] [MERGE1...]")
        return parser

commands = { 
'changes' : Changes,
'help' : Help,
'update': Update,
'apply-changes':ApplyChanges,
'cat-log': CatLog,
'commit': Commit,
'revision': Revision,
'revisions': Revisions,
'get': Get,
'revert': Revert,
'shell': Shell,
'add-id': AddID,
'merge': Merge,
'elog': ELog,
'mirror-archive': MirrorArchive,
'ninventory': Inventory,
'alias' : Alias,
'request-merge': RequestMerge,
}
suggestions = {
'apply-delta' : "Try \"apply-changes\".",
'delta' : "To compare two revisions, use \"changes\".",
'diff-rev' : "To compare two revisions, use \"changes\".",
'undo' : "To undo local changes, use \"revert\".",
'undelete' : "To undo only deletions, use \"revert --deletions\"",
'missing-from' : "Try \"revisions --missing-from\".",
'missing' : "Try \"revisions --missing\".",
'missing-merge' : "Try \"revisions --partner-missing\".",
'new-merges' : "Try \"revisions --new-merges\".",
'cachedrevs' : "Try \"revisions --cacherevs\". (no 'd')",
'logs' : "Try \"revisions --logs\"",
'tree-source' : "Use the \"^ttag\" alias (\"revision ^ttag\")",
'latest-revision' : "Use the \"^acur\" alias (\"revision ^acur\")",
'change-version' : "Try \"update REVISION\"",
'tree-revision' : "Use the \"^tcur\" alias (\"revision ^tcur\")",
'rev-depends' : "Use revisions --dependencies",
'auto-get' : "Plain get will do archive lookups",
'tagline' : "Use add-id.  It uses taglines in tagline trees",
'emlog' : "Use elog.  It automatically adds log-for-merge text, if any",
'library-revisions' : "Use revisions --library",
'file-revert' : "Use revert FILE"
}
# arch-tag: 19d5739d-3708-486c-93ba-deecc3027fc7