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#!/usr/bin/env python
"""\
Just some work for generating a changeset.
"""
import bzrlib, bzrlib.errors
import common
from bzrlib.inventory import ROOT_ID
from bzrlib.errors import BzrCommandError
try:
set
except NameError:
from sets import Set as set
def _get_trees(branch, revisions):
"""Get the old and new trees based on revision.
"""
from bzrlib.tree import EmptyTree
if revisions[0] is None:
if hasattr(branch, 'get_root_id'): # Watch out for trees with labeled ROOT ids
old_tree = EmptyTree(branch.get_root_id)
else:
old_tree = EmptyTree()
else:
old_tree = branch.revision_tree(revisions[0])
if revisions[1] is None:
raise BzrCommandError('Cannot form a bzr changeset with no committed revisions')
else:
new_tree = branch.revision_tree(revisions[1])
return old_tree, new_tree
def _fake_working_revision(branch):
"""Fake a Revision object for the working tree.
This is for the future, to support changesets against the working tree.
"""
from bzrlib.revision import Revision
import time
from bzrlib.osutils import local_time_offset, \
username
precursor = branch.last_patch()
precursor_sha1 = branch.get_revision_sha1(precursor)
return Revision(timestamp=time.time(),
timezone=local_time_offset(),
committer=username(),
precursor=precursor,
precursor_sha1=precursor_sha1)
class MetaInfoHeader(object):
"""Maintain all of the header information about this
changeset.
"""
def __init__(self, branch, revisions, delta,
full_remove=True, full_rename=False,
new_tree=None, old_tree=None,
old_label = '', new_label = ''):
"""
:param full_remove: Include the full-text for a delete
:param full_rename: Include an add+delete patch for a rename
"""
self.branch = branch
self.delta = delta
self.full_remove=full_remove
self.full_rename=full_rename
self.old_label = old_label
self.new_label = new_label
self.old_tree = old_tree
self.new_tree = new_tree
self.to_file = None
#self.revno = None
#self.parent_revno = None
# These are entries in the header.
# They will be repeated in the footer,
# only if they have changed
self.date = None
self.committer = None
self.message = None
self._get_revision_list(revisions)
def _get_revision_list(self, revisions):
"""This generates the list of all revisions from->to.
This is for having a rollup changeset.
"""
old_revno = None
new_revno = None
rh = self.branch.revision_history()
for revno, rev in enumerate(rh):
if rev == revisions[0]:
old_revno = revno
if rev == revisions[1]:
new_revno = revno
self.revision_list = []
if old_revno is None:
self.base_revision = None # Effectively the EmptyTree()
old_revno = -1
else:
self.base_revision = self.branch.get_revision(rh[old_revno])
if new_revno is None:
# For the future, when we support working tree changesets.
for rev_id in rh[old_revno+1:]:
self.revision_list.append(self.branch.get_revision(rev_id))
self.revision_list.append(_fake_working_revision(self.branch))
else:
for rev_id in rh[old_revno+1:new_revno+1]:
self.revision_list.append(self.branch.get_revision(rev_id))
#self.parent_revno = old_revno+1
#self.revno = new_revno+1
def _write(self, txt, key=None):
if key:
self.to_file.write('# %s: %s\n' % (key, txt))
else:
self.to_file.write('# %s\n' % (txt,))
def write_meta_info(self, to_file):
"""Write out the meta-info portion to the supplied file.
:param to_file: Write out the meta information to the supplied
file
"""
self.to_file = to_file
self._write_header()
self._write_diffs()
self._write_footer()
def _write_header(self):
"""Write the stuff that comes before the patches."""
from bzrlib.osutils import username
from common import format_highres_date
write = self._write
for line in common.get_header():
write(line)
# Print out the basic information about the 'target' revision
rev = self.revision_list[-1]
write(rev.committer, key='committer')
self.committer = rev.committer
self.date = format_highres_date(rev.timestamp, offset=rev.timezone)
write(self.date, key='date')
if rev.message:
self.to_file.write('# message:\n')
for line in rev.message.split('\n'):
self.to_file.write('# %s\n' % line)
self.message = rev.message
write('')
self.to_file.write('\n')
def _write_footer(self):
"""Write the stuff that comes after the patches.
This is meant to be more meta-information, which people probably don't want
to read, but which is required for proper bzr operation.
"""
write = self._write
# What should we print out for an Empty base revision?
if len(self.revision_list[0].parents) == 0:
assumed_base = None
else:
assumed_base = self.revision_list[0].parents[0].revision_id
if (self.base_revision is not None
and self.base_revision.revision_id != assumed_base):
base = self.base_revision.revision_id
write(base, key='base')
write(self.branch.get_revision_sha1(base), key='base sha1')
self._write_revisions()
#self._write_ids()
self._write_text_ids()
def _write_revisions(self):
"""Not used. Used for writing multiple revisions."""
from common import format_highres_date
for rev in self.revision_list:
rev_id = rev.revision_id
self.to_file.write('# revision: %s\n' % rev_id)
self.to_file.write('# sha1: %s\n' %
self.branch.get_revision_sha1(rev_id))
if rev.committer != self.committer:
self.to_file.write('# committer: %s\n' % rev.committer)
date = format_highres_date(rev.timestamp, rev.timezone)
if date != self.date:
self.to_file.write('# date: %s\n' % date)
if rev.inventory_id != rev_id:
self.to_file.write('# inventory id: %s\n' % rev.inventory_id)
self.to_file.write('# inventory sha1: %s\n' % rev.inventory_sha1)
if len(rev.parents) > 0:
self.to_file.write('# parents:\n')
for parent in rev.parents:
self.to_file.write('# %s\t%s\n' % (
parent.revision_id,
parent.revision_sha1))
if rev.message and rev.message != self.message:
self.to_file.write('# message:\n')
for line in rev.message.split('\n'):
self.to_file.write('# %s\n' % line)
def _write_ids(self):
if hasattr(self.branch, 'get_root_id'):
root_id = self.branch.get_root_id()
else:
root_id = ROOT_ID
old_ids = set()
new_ids = set()
for path, file_id, kind in self.delta.removed:
old_ids.add(file_id)
for path, file_id, kind in self.delta.added:
new_ids.add(file_id)
for old_path, new_path, file_id, kind, text_modified in self.delta.renamed:
old_ids.add(file_id)
new_ids.add(file_id)
for path, file_id, kind in self.delta.modified:
new_ids.add(file_id)
self._write(root_id, key='tree root id')
def write_ids(tree, id_set, name):
if len(id_set) > 0:
self.to_file.write('# %s ids:\n' % name)
seen_ids = set([root_id])
while len(id_set) > 0:
file_id = id_set.pop()
if file_id in seen_ids:
continue
seen_ids.add(file_id)
ie = tree.inventory[file_id]
if ie.parent_id not in seen_ids:
id_set.add(ie.parent_id)
path = tree.inventory.id2path(file_id)
self.to_file.write('# %s\t%s\t%s\n'
% (path, file_id,
ie.parent_id))
write_ids(self.new_tree, new_ids, 'file')
write_ids(self.old_tree, old_ids, 'old file')
def _write_text_ids(self):
pass
def _write_diffs(self):
"""Write out the specific diffs"""
from bzrlib.diff import internal_diff, external_diff
from common import encode
DEVNULL = '/dev/null'
diff_file = internal_diff
# Get the target tree so that we can check for
# Appropriate text ids.
rev_id = self.revision_list[-1].revision_id
tree = self.branch.revision_tree(rev_id)
def get_text_id_str(file_id, modified=True):
"""This returns an empty string if guess_text_id == real_text_id.
Otherwise it returns a string suitable for printing, indicating
the file's id.
"""
guess_id = common.guess_text_id(tree, file_id, rev_id,
modified=modified)
real_id = tree.inventory[file_id].text_id
if guess_id != real_id:
return '\ttext-id:' + encode(real_id)
else:
return ''
for path, file_id, kind in self.delta.removed:
# We don't care about text ids for removed files
print >>self.to_file, '*** removed %s %s' % (kind,
encode(path))
if kind == 'file' and self.full_remove:
diff_file(self.old_label + path,
self.old_tree.get_file(file_id).readlines(),
DEVNULL,
[],
self.to_file)
for path, file_id, kind in self.delta.added:
print >>self.to_file, '*** added %s %s\tfile-id:%s%s' % (kind,
encode(path),
encode(file_id),
get_text_id_str(file_id))
if kind == 'file':
diff_file(DEVNULL,
[],
self.new_label + path,
self.new_tree.get_file(file_id).readlines(),
self.to_file)
for old_path, new_path, file_id, kind, text_modified in self.delta.renamed:
print >>self.to_file, '*** renamed %s %s\t=> %s%s' % (kind,
encode(old_path), encode(new_path),
get_text_id_str(file_id, text_modified))
if self.full_rename and kind == 'file':
diff_file(self.old_label + old_path,
self.old_tree.get_file(file_id).readlines(),
DEVNULL,
[],
self.to_file)
diff_file(DEVNULL,
[],
self.new_label + new_path,
self.new_tree.get_file(file_id).readlines(),
self.to_file)
elif text_modified:
diff_file(self.old_label + old_path,
self.old_tree.get_file(file_id).readlines(),
self.new_label + new_path,
self.new_tree.get_file(file_id).readlines(),
self.to_file)
for path, file_id, kind in self.delta.modified:
print >>self.to_file, '*** modified %s %s%s' % (kind,
encode(path), get_text_id_str(file_id))
if kind == 'file':
diff_file(self.old_label + path,
self.old_tree.get_file(file_id).readlines(),
self.new_label + path,
self.new_tree.get_file(file_id).readlines(),
self.to_file)
def show_changeset(branch, revisions=None, to_file=None, include_full_diff=False):
from bzrlib.diff import compare_trees
if to_file is None:
import sys
to_file = sys.stdout
revisions = common.canonicalize_revision(branch, revisions)
old_tree, new_tree = _get_trees(branch, revisions)
delta = compare_trees(old_tree, new_tree, want_unchanged=False)
meta = MetaInfoHeader(branch, revisions, delta,
old_tree=old_tree, new_tree=new_tree)
meta.write_meta_info(to_file)
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