13
13
# You should have received a copy of the GNU General Public License
14
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17
from __future__ import absolute_import
17
19
# \subsection{\emph{rio} - simple text metaformat}
19
21
# \emph{r} stands for `restricted', `reproducible', or `rfc822-like'.
21
23
# The stored data consists of a series of \emph{stanzas}, each of which contains
22
24
# \emph{fields} identified by an ascii name, with Unicode or string contents.
23
# The field tag is constrained to alphanumeric characters.
25
# The field tag is constrained to alphanumeric characters.
24
26
# There may be more than one field in a stanza with the same name.
26
28
# The format itself does not deal with character encoding issues, though
27
29
# the result will normally be written in Unicode.
29
31
# The format is intended to be simple enough that there is exactly one character
30
32
# stream representation of an object and vice versa, and that this relation
31
33
# will continue to hold for future versions of bzr.
37
from bzrlib import osutils
35
38
from bzrlib.iterablefile import IterableFile
37
40
# XXX: some redundancy is allowing to write stanzas in isolation as well as
38
# through a writer object.
41
# through a writer object.
40
43
class RioWriter(object):
41
44
def __init__(self, to_file):
195
202
for tag, value in self.items:
197
result.append(tag + ': \n')
204
result.append(tag + u': \n')
199
206
# don't want splitlines behaviour on empty lines
200
val_lines = value.split('\n')
201
result.append(tag + ': ' + val_lines[0] + '\n')
207
val_lines = value.split(u'\n')
208
result.append(tag + u': ' + val_lines[0] + u'\n')
202
209
for line in val_lines[1:]:
203
result.append('\t' + line + '\n')
210
result.append(u'\t' + line + u'\n')
205
result.append(tag + ': ' + value + '\n')
212
result.append(tag + u': ' + value + u'\n')
206
213
return u''.join(result)
208
215
def write(self, to_file):
237
244
for tag, value in self.items:
242
_tag_re = re.compile(r'^[-a-zA-Z0-9_]+$')
243
249
def valid_tag(tag):
244
return bool(_tag_re.match(tag))
250
return _valid_tag(tag)
247
253
def read_stanza(line_iter):
248
254
"""Return new Stanza read from list of lines or a file
250
256
Returns one Stanza that was read, or returns None at end of file. If a
251
257
blank line follows the stanza, it is consumed. It's not an error for
252
258
there to be no blank at end of file. If there is a blank file at the
253
start of the input this is really an empty stanza and that is returned.
259
start of the input this is really an empty stanza and that is returned.
255
261
Only the stanza lines and the trailing blank (if any) are consumed
256
262
from the line_iter.
258
264
The raw lines must be in utf-8 encoding.
260
unicode_iter = (line.decode('utf-8') for line in line_iter)
261
return read_stanza_unicode(unicode_iter)
266
return _read_stanza_utf8(line_iter)
264
269
def read_stanza_unicode(unicode_iter):
278
283
:return: A Stanza object if there are any lines in the file.
285
# TODO: jam 20060922 This code should raise real errors rather than
286
# using 'assert' to process user input, or raising ValueError
287
# rather than a more specific error.
289
for line in unicode_iter:
290
if line is None or line == '':
293
break # end of stanza
294
assert line.endswith('\n')
296
if line[0] == '\t': # continues previous value
298
raise ValueError('invalid continuation line %r' % real_l)
299
accum_value += '\n' + line[1:-1]
300
else: # new tag:value line
302
stanza.add(tag, accum_value)
304
colon_index = line.index(': ')
306
raise ValueError('tag/value separator not found in line %r'
308
tag = str(line[:colon_index])
309
assert valid_tag(tag), \
310
"invalid rio tag %r" % tag
311
accum_value = line[colon_index+2:-1]
313
if tag is not None: # add last tag-value
314
stanza.add(tag, accum_value)
316
else: # didn't see any content
286
return _read_stanza_unicode(unicode_iter)
289
def to_patch_lines(stanza, max_width=72):
290
"""Convert a stanza into RIO-Patch format lines.
292
RIO-Patch is a RIO variant designed to be e-mailed as part of a patch.
293
It resists common forms of damage such as newline conversion or the removal
294
of trailing whitespace, yet is also reasonably easy to read.
296
:param max_width: The maximum number of characters per physical line.
297
:return: a list of lines
300
raise ValueError(max_width)
301
max_rio_width = max_width - 4
303
for pline in stanza.to_lines():
304
for line in pline.split('\n')[:-1]:
305
line = re.sub('\\\\', '\\\\\\\\', line)
307
partline = line[:max_rio_width]
308
line = line[max_rio_width:]
309
if len(line) > 0 and line[0] != [' ']:
311
break_index = partline.rfind(' ', -20)
313
break_index = partline.rfind('-', -20)
316
break_index = partline.rfind('/', -20)
318
line = partline[break_index:] + line
319
partline = partline[:break_index]
322
partline = re.sub('\r', '\\\\r', partline)
326
elif re.search(' $', partline):
329
lines.append('# ' + partline + '\n')
335
def _patch_stanza_iter(line_iter):
340
return map[match.group(0)]
343
for line in line_iter:
344
if line.startswith('# '):
346
elif line.startswith('#'):
349
raise ValueError("bad line %r" % (line,))
350
if last_line is not None and len(line) > 2:
352
line = re.sub('\r', '', line)
353
line = re.sub('\\\\(.|\n)', mapget, line)
354
if last_line is None:
358
if last_line[-1] == '\n':
361
if last_line is not None:
365
def read_patch_stanza(line_iter):
366
"""Convert an iterable of RIO-Patch format lines into a Stanza.
368
RIO-Patch is a RIO variant designed to be e-mailed as part of a patch.
369
It resists common forms of damage such as newline conversion or the removal
370
of trailing whitespace, yet is also reasonably easy to read.
374
return read_stanza(_patch_stanza_iter(line_iter))
378
from bzrlib._rio_pyx import (
380
_read_stanza_unicode,
383
except ImportError, e:
384
osutils.failed_to_load_extension(e)
385
from bzrlib._rio_py import (
387
_read_stanza_unicode,