/usr/lib/python2.7/dist-packages/xxdiff/scripts/cvsrevcmp.py is in xxdiff-scripts 1:4.0.1+hg487+dfsg-1.
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#
# Note: this has originally been distributed by Michalis Giannakidis, under the
# name cvsxxdiff.py. This script was integrated in april 2006 in the xxdiff
# scripts.
"""xx-cvs-revcmp [<options>] [FILE ...]
Display file differences with the current or a previous CVS version. Use one or
two of the version selection options to select which filesets to compare.
Here is the original submission email description:
What, here in our company, find useful about cvsxxdiff is:
- cvsxxdiff is one file. No python module directory or initialization is
required.
- Do a 'cvs up; cvsxxdiff' before commit to see all the local changes we have
made.
- Do 'cvs up; cvsxxdiff -b 1 file.c' to see the last chages that were made on
a file by a colleague.
- We often need to track bugs in our code. This means going back to previous
revisions, thus doing ex: 'cvsxxdiff -b 1 -b 2 file.c' to compare the
previous with the 2nd previous revision. (similar with cvsxxdiff -r 1.1 -r
1.2 file.c)
- The utility prints in the standard output the logs between revisions i
and j ( ex: cvsxxdif -b i -b j file.c)
One script to do it all.
"""
__author__ = ('Michalis Giannakidis <mgiannakidis@gmail.com>',
'Martin Blais <blais@furius.ca>')
# stdlib imports.
import sys, os, re, tempfile
from subprocess import Popen, PIPE, call
from os.path import *
# xxdiff imports.
import xxdiff.scripts
import xxdiff.invoke
from xxdiff.scripts import tmpprefix
def find_in_trunk(search_directories, fn):
"""
Recursively search for paths of all files whose basename matches 'fn' under
the directories from 'search_directories' and return a list of them.
"""
# Make sure that fn is always just a basename.
assert os.pathsep not in fn
# Run the search.
files = []
for d in search_directories:
for root, dirs, files_in_dir in os.walk(d):
if 'CVS' in dirs:
dirs.remove('CVS') # don't visit CVS directories
if fn in files_in_dir:
files.append(join(root, fn))
return files
match_status = re.compile('File:\s*([^\s]+)\s*Status: (.*)')
def collect_unupdated_files(diff_directories, resolve_conflicts):
"""
Collect all files that are not updated (compared to the repository).
"""
assert diff_directories
p = Popen(['cvs', 'status'] + diff_directories, stdout=PIPE)
stdout, stderr = p.communicate()
lines = stdout.splitlines()
collected_files = []
for l in lines:
m = match_status.search(l)
if not m:
continue
if resolve_conflicts:
if m.group(2) != 'File had conflicts on merge':
continue
else:
if m.group(2) == 'Up-to-date':
continue
fn = m.group(1)
# Run the search from the CWD if there are no diff dirs.
files = find_in_trunk(diff_directories, fn)
if files:
if len(files) > 1:
print '%s more than once' % fn
# FIXME: if we find a file more than once,
# keep the unupdated.
collected_files.extend(files)
else:
print '%s: No such file' % fn
return collected_files
def get_local_trunk_version(filename):
"""
For filename, get the current revision number (of the local version).
"""
dn, bn = split(filename)
lines = open(join(dn, 'CVS', 'Entries')).readlines()
match_unupdated = re.compile('/%s/([0-9\.]*)' % bn)
for l in lines:
m = match_unupdated.search(l)
if m:
return m.group(1)
return '1.1'
match_repository_rev = re.compile('Repository revision:\s([0-9\.]*)')
def get_repository_revision(filename):
"""
Get the Repository revision of a file.
"""
p = Popen(['cvs', 'status', filename], stdout=PIPE)
stdout, stderr = p.communicate()
for l in stdout.splitlines():
m = match_repository_rev.search(l)
if m:
return m.group(1)
return '1.1'
def get_previous_revision(filename, back):
"""
For filename, get its previous revision number (compared to the local
version).
"""
r = get_local_trunk_version(filename).split('.')
r[-1] = str(int(r[-1]) - back)
r = '.'.join(r)
return r
def get_revisions_between(r1, r2):
"""
Return a list with the CVS version strings between to releases.
"""
rev = []
l_r1 = r1.split('.')
l_r2 = r2.split('.')
try:
beg = int(l_r1[-1])
end = int(l_r2[-1])
except ValueError:
return rev
if end <= beg:
rg = xrange(beg, end-1, -1)
else:
rg = xrange(beg, end+1)
for r in rg:
l_r1[-1] = str(r)
rev.append('.'.join(l_r1))
return rev
match_log_start = re.compile('^----------------------------')
def get_revision_log(filename, rev):
"""
Get the CVS log of a filename given a revision.
"""
log = []
# Note: watch out for the 'cvs log' command, the value of the -r option must
# not contain spaces before the value, it must be lumped together with the
# option. This is a CVS options parsing bug.
p = Popen(['cvs', 'log', '-r%s' % rev, filename], stdout=PIPE, stderr=PIPE)
stdout, stderr = p.communicate()
# Note: we're simply throwing away stderr here.
start_log = False
for l in stdout.splitlines():
if start_log == 0:
if match_log_start.search(l):
start_log = True
continue
if start_log:
log.append(l)
return log
def mkheader(filename):
"""
Build a header for display.
"""
return ('>%s<' % filename).center(80).replace(' ', '_')
def cvsxxdiff_bi_bj(diff_files, prevcounts):
"""
Compare two relative revision numbers.
"""
for fn in diff_files:
print mkheader(fn)
# Get revision numbers.
v1, v2 = [get_previous_revision(fn, prevcounts[x]) for x in 0, 1]
# Get the files from the server.
tmpfiles = []
for v in v1, v2:
f = tempfile.NamedTemporaryFile('w+', prefix=tmpprefix)
tmpfiles.append(f)
call(['cvs', 'update', '-r', v, '-p', fn], stdout=f)
# Print the revisions.
revs = get_revisions_between(v1, v2)
for r in revs:
print '\n'.join(get_revision_log(fn, r))
# Launch xxdiff.
xxdiff.invoke.xxdiff_display(
opts,
'--title1', "%s ( %s )" % (fn, v1),
'--title2', "%s ( %s )" % (fn, v2),
*[x.name for x in tmpfiles])
def cvsxxdiff_bi(diff_files, prevcount):
"""
Compare to one relative revision number.
"""
for fn in diff_files:
print mkheader(fn)
# Get revision numbers.
v = get_previous_revision(fn, prevcount)
vl = get_local_trunk_version(fn)
# Print the revisions.
revs = get_revisions_between(v, vl)
for r in revs:
print '\n'.join(get_revision_log(fn, r))
# Get the other file from the server.
p = Popen(['cvs', 'update', '-r', v, '-p', fn], stdout=PIPE)
# Launch xxdiff.
xxdiff.invoke.xxdiff_display(
opts,
'--title1', ('%s ( %s ) File as %d versions ago' %
(fn, v, prevcount)),
'--title2', ('%s ( %s ) local version' %
(fn, vl)),
'-', fn, stdin=p.stdout)
def cvsxxdiff_ri(diff_files, action):
"""
Compare to one absolute revision number.
"""
for fn in diff_files:
print mkheader(fn)
# Print the revisions.
if action[0] == 'r':
print '\n'.join(get_revision_log(fn, action[1]))
# Launch xxdiff.
p = Popen(['cvs', 'update', '-%s' % action[0], action[1], '-p', fn],
stdout=PIPE)
xxdiff.invoke.xxdiff_display(
opts,
'--title1', '%s ( %s )' % (fn, action[1]),
'--title2', ('%s ( %s ) local version' %
(fn, get_local_trunk_version(fn))),
'-', fn, stdin=p.stdout)
def cvsxxdiff_ri_rj(diff_files, actions):
"""
Compare to two absolute revision numbers.
"""
revisions = [x[1] for x in actions]
for fn in diff_files:
print mkheader(fn)
# Fetch the temporary files.
tmpfiles = []
for code, rev in actions:
f = tempfile.NamedTemporaryFile('w+', prefix=tmpprefix)
tmpfiles.append(f)
call(['cvs', 'update', '-%s' % code, rev, '-p', fn], stdout=f)
# Print revisions.
if actions[0][0] == 'r' and actions[1][0] == 'r':
revs = get_revisions_between(revisions[0], revisions[1])
for r in revs:
print '\n'.join(get_revision_log(fn, r))
# Launch xxdiff.
xxdiff.invoke.xxdiff_display(
opts,
'--title1', "%s ( %s )" % (fn, revisions[0]),
'--title2', "%s ( %s )" % (fn, revisions[1]),
*[x.name for x in tmpfiles])
def cvsxxdiff_rep(diff_files):
"""
Compare checkout to repository.
"""
for fn in diff_files:
print mkheader(fn)
# Get the revisions.
vr = get_repository_revision(fn)
vl = get_local_trunk_version(fn)
# Print the revisions.
revs = get_revisions_between(vr, vl)
for r in revs:
print '\n'.join(get_revision_log(fn, r))
# Launch xxdiff.
p = Popen(['cvs', 'update', '-p', fn], stdout=PIPE)
xxdiff.invoke.xxdiff_display(
opts,
'--title1', '%s ( %s ) cvs version' % (fn, vr),
'--title2', '%s ( %s ) local version' % (fn, vl),
'-', fn, stdin=p.stdout)
def cvsxxdiff_c(diff_files):
"""
Resolve conflicts.
"""
for fn in diff_files:
print mkheader(fn)
# Get revision numbers.
vl = get_local_trunk_version(fn)
print '\n'.join(get_revision_log(fn, vl))
# Launch xxdiff.
xxdiff.invoke.xxdiff_display(
opts,
'--resource', 'Show.PaneMergedView: True',
'--unmerge',
fn)
def parse_options():
"""
Parse the options.
"""
import optparse
parser = optparse.OptionParser(__doc__.strip())
group = optparse.OptionGroup(parser, "Options for selecting the revisions",
"These options allow you to specify the "
"revisions to compare. You can specify zero, "
"one or two of the following options. The "
"default is otherwise HEAD (latest).")
group.add_option('-r', '--revision-tag', '--tag', action='append',
metavar='TAG', dest='revisions', default=[],
help="A tag like CVS. See cvs(1).")
group.add_option('-D', '--date-spec', action='append',
dest='dates', default=[],
help="A date spec like CVS. See cvs(1).")
group.add_option('-b', '--nb-revisions-before', action='append', type='int',
metavar='NBREVS', dest='before', default=[],
help="The number of previous CVS revisions from BASE.")
parser.add_option_group(group)
parser.add_option('-c', '--resolve-conflicts', action='store_true',
help="Resolve conflicts in merged files.")
xxdiff.invoke.options_graft(parser)
xxdiff.scripts.install_autocomplete(parser)
opts, args = parser.parse_args()
xxdiff.invoke.options_validate(opts, parser)
# Figure out the two actions from the options that were passed in. There
# can be at most two actions. Each action is specified as a pair of
# (action-code, spec).
actions = []
for code, optlist in (('b', opts.before),
('r', opts.revisions),
('D', opts.dates)):
actions.extend((code, x) for x in optlist)
if len(actions) > 2:
parser.error("You cannot specify more than two revision selection "
"options.")
return opts, actions, args
def revcomp_main():
"""
Command-line interface (looks at sys.argv to decide what to do).
"""
global opts
opts, actions, filenames = parse_options()
# Separate files and directories in arguments.
diff_files, diff_directories = [], []
for fn in filenames:
if isfile(fn):
diff_files.append(fn)
elif isdir(fn):
diff_directories.append(fn)
# Collect files.
#
# If no files were given on the command line or command was invoked on
# specific directories, search for unupdated files recursively in
# o) in the specified directories or
# o) the current dir
if len(diff_files) == 0 or len(diff_directories) :
collected_files = collect_unupdated_files(diff_directories or ['.'],
opts.resolve_conflicts)
diff_files.extend(collected_files)
if len(diff_files) > 1 :
# Print a message to the user about the list of files to diff.
# Print it in a single line. This allows to copy paste the output to
# ex. a 'cvs commit' command.
print '%d files to diff:' % len(diff_files)
print '=' * 80
print ' '.join(diff_files)
print '=' * 80
# Dispatch to the appropriate method.
if opts.resolve_conflicts:
# ex: -c
if actions:
raise SystemExit("You cannot specify revision selectors when "
"resolving conflicts.")
cvsxxdiff_c(diff_files)
# With a single revision selector.
elif len(actions) == 1:
code, count = actions[0]
if code == 'b':
# ex: -b1
cvsxxdiff_bi(diff_files, count)
elif code in ('r', 'D'):
# ex: -r1.2 # or with date_spec
cvsxxdiff_ri(diff_files, actions[0])
else:
raise SystemExit("Unsupported revision combination.")
# With two revision selectors.
elif len(actions) == 2:
codes = tuple([x[0] for x in actions])
revs = tuple([x[1] for x in actions])
if codes == ('b', 'b'):
# ex: -b1 -b2
cvsxxdiff_bi_bj(diff_files, revs)
if codes[0] in ('r', 'D') and codes[1] in ('r', 'D'):
# ex: -r1.2 -r1.3
cvsxxdiff_ri_rj(diff_files, actions)
else:
raise SystemExit("Unsupported revision combination.")
elif not actions:
# ex: cvsxxdiff
cvsxxdiff_rep(diff_files)
def main():
xxdiff.scripts.interruptible_main(revcomp_main)
if __name__ == '__main__':
main()
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