ref: a3b95d3e567c0ef60f9f1ead26124fb706dec20d
dir: /sys/src/cmd/hg/hgext/convert/cvsps.py/
#
# Mercurial built-in replacement for cvsps.
#
# Copyright 2008, Frank Kingswood <frank@kingswood-consulting.co.uk>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2, incorporated herein by reference.
import os
import re
import cPickle as pickle
from mercurial import util
from mercurial.i18n import _
class logentry(object):
'''Class logentry has the following attributes:
.author - author name as CVS knows it
.branch - name of branch this revision is on
.branches - revision tuple of branches starting at this revision
.comment - commit message
.date - the commit date as a (time, tz) tuple
.dead - true if file revision is dead
.file - Name of file
.lines - a tuple (+lines, -lines) or None
.parent - Previous revision of this entry
.rcs - name of file as returned from CVS
.revision - revision number as tuple
.tags - list of tags on the file
.synthetic - is this a synthetic "file ... added on ..." revision?
.mergepoint- the branch that has been merged from
(if present in rlog output)
.branchpoints- the branches that start at the current entry
'''
def __init__(self, **entries):
self.__dict__.update(entries)
def __repr__(self):
return "<%s at 0x%x: %s %s>" % (self.__class__.__name__,
id(self),
self.file,
".".join(map(str, self.revision)))
class logerror(Exception):
pass
def getrepopath(cvspath):
"""Return the repository path from a CVS path.
>>> getrepopath('/foo/bar')
'/foo/bar'
>>> getrepopath('c:/foo/bar')
'c:/foo/bar'
>>> getrepopath(':pserver:10/foo/bar')
'/foo/bar'
>>> getrepopath(':pserver:10c:/foo/bar')
'/foo/bar'
>>> getrepopath(':pserver:/foo/bar')
'/foo/bar'
>>> getrepopath(':pserver:c:/foo/bar')
'c:/foo/bar'
>>> getrepopath(':pserver:truc@foo.bar:/foo/bar')
'/foo/bar'
>>> getrepopath(':pserver:truc@foo.bar:c:/foo/bar')
'c:/foo/bar'
"""
# According to CVS manual, CVS paths are expressed like:
# [:method:][[user][:password]@]hostname[:[port]]/path/to/repository
#
# Unfortunately, Windows absolute paths start with a drive letter
# like 'c:' making it harder to parse. Here we assume that drive
# letters are only one character long and any CVS component before
# the repository path is at least 2 characters long, and use this
# to disambiguate.
parts = cvspath.split(':')
if len(parts) == 1:
return parts[0]
# Here there is an ambiguous case if we have a port number
# immediately followed by a Windows driver letter. We assume this
# never happens and decide it must be CVS path component,
# therefore ignoring it.
if len(parts[-2]) > 1:
return parts[-1].lstrip('0123456789')
return parts[-2] + ':' + parts[-1]
def createlog(ui, directory=None, root="", rlog=True, cache=None):
'''Collect the CVS rlog'''
# Because we store many duplicate commit log messages, reusing strings
# saves a lot of memory and pickle storage space.
_scache = {}
def scache(s):
"return a shared version of a string"
return _scache.setdefault(s, s)
ui.status(_('collecting CVS rlog\n'))
log = [] # list of logentry objects containing the CVS state
# patterns to match in CVS (r)log output, by state of use
re_00 = re.compile('RCS file: (.+)$')
re_01 = re.compile('cvs \\[r?log aborted\\]: (.+)$')
re_02 = re.compile('cvs (r?log|server): (.+)\n$')
re_03 = re.compile("(Cannot access.+CVSROOT)|"
"(can't create temporary directory.+)$")
re_10 = re.compile('Working file: (.+)$')
re_20 = re.compile('symbolic names:')
re_30 = re.compile('\t(.+): ([\\d.]+)$')
re_31 = re.compile('----------------------------$')
re_32 = re.compile('======================================='
'======================================$')
re_50 = re.compile('revision ([\\d.]+)(\s+locked by:\s+.+;)?$')
re_60 = re.compile(r'date:\s+(.+);\s+author:\s+(.+);\s+state:\s+(.+?);'
r'(\s+lines:\s+(\+\d+)?\s+(-\d+)?;)?'
r'(.*mergepoint:\s+([^;]+);)?')
re_70 = re.compile('branches: (.+);$')
file_added_re = re.compile(r'file [^/]+ was (initially )?added on branch')
prefix = '' # leading path to strip of what we get from CVS
if directory is None:
# Current working directory
# Get the real directory in the repository
try:
prefix = open(os.path.join('CVS','Repository')).read().strip()
if prefix == ".":
prefix = ""
directory = prefix
except IOError:
raise logerror('Not a CVS sandbox')
if prefix and not prefix.endswith(os.sep):
prefix += os.sep
# Use the Root file in the sandbox, if it exists
try:
root = open(os.path.join('CVS','Root')).read().strip()
except IOError:
pass
if not root:
root = os.environ.get('CVSROOT', '')
# read log cache if one exists
oldlog = []
date = None
if cache:
cachedir = os.path.expanduser('~/.hg.cvsps')
if not os.path.exists(cachedir):
os.mkdir(cachedir)
# The cvsps cache pickle needs a uniquified name, based on the
# repository location. The address may have all sort of nasties
# in it, slashes, colons and such. So here we take just the
# alphanumerics, concatenated in a way that does not mix up the
# various components, so that
# :pserver:user@server:/path
# and
# /pserver/user/server/path
# are mapped to different cache file names.
cachefile = root.split(":") + [directory, "cache"]
cachefile = ['-'.join(re.findall(r'\w+', s)) for s in cachefile if s]
cachefile = os.path.join(cachedir,
'.'.join([s for s in cachefile if s]))
if cache == 'update':
try:
ui.note(_('reading cvs log cache %s\n') % cachefile)
oldlog = pickle.load(open(cachefile))
ui.note(_('cache has %d log entries\n') % len(oldlog))
except Exception, e:
ui.note(_('error reading cache: %r\n') % e)
if oldlog:
date = oldlog[-1].date # last commit date as a (time,tz) tuple
date = util.datestr(date, '%Y/%m/%d %H:%M:%S %1%2')
# build the CVS commandline
cmd = ['cvs', '-q']
if root:
cmd.append('-d%s' % root)
p = util.normpath(getrepopath(root))
if not p.endswith('/'):
p += '/'
prefix = p + util.normpath(prefix)
cmd.append(['log', 'rlog'][rlog])
if date:
# no space between option and date string
cmd.append('-d>%s' % date)
cmd.append(directory)
# state machine begins here
tags = {} # dictionary of revisions on current file with their tags
branchmap = {} # mapping between branch names and revision numbers
state = 0
store = False # set when a new record can be appended
cmd = [util.shellquote(arg) for arg in cmd]
ui.note(_("running %s\n") % (' '.join(cmd)))
ui.debug(_("prefix=%r directory=%r root=%r\n") % (prefix, directory, root))
pfp = util.popen(' '.join(cmd))
peek = pfp.readline()
while True:
line = peek
if line == '':
break
peek = pfp.readline()
if line.endswith('\n'):
line = line[:-1]
#ui.debug('state=%d line=%r\n' % (state, line))
if state == 0:
# initial state, consume input until we see 'RCS file'
match = re_00.match(line)
if match:
rcs = match.group(1)
tags = {}
if rlog:
filename = util.normpath(rcs[:-2])
if filename.startswith(prefix):
filename = filename[len(prefix):]
if filename.startswith('/'):
filename = filename[1:]
if filename.startswith('Attic/'):
filename = filename[6:]
else:
filename = filename.replace('/Attic/', '/')
state = 2
continue
state = 1
continue
match = re_01.match(line)
if match:
raise Exception(match.group(1))
match = re_02.match(line)
if match:
raise Exception(match.group(2))
if re_03.match(line):
raise Exception(line)
elif state == 1:
# expect 'Working file' (only when using log instead of rlog)
match = re_10.match(line)
assert match, _('RCS file must be followed by working file')
filename = util.normpath(match.group(1))
state = 2
elif state == 2:
# expect 'symbolic names'
if re_20.match(line):
branchmap = {}
state = 3
elif state == 3:
# read the symbolic names and store as tags
match = re_30.match(line)
if match:
rev = [int(x) for x in match.group(2).split('.')]
# Convert magic branch number to an odd-numbered one
revn = len(rev)
if revn > 3 and (revn % 2) == 0 and rev[-2] == 0:
rev = rev[:-2] + rev[-1:]
rev = tuple(rev)
if rev not in tags:
tags[rev] = []
tags[rev].append(match.group(1))
branchmap[match.group(1)] = match.group(2)
elif re_31.match(line):
state = 5
elif re_32.match(line):
state = 0
elif state == 4:
# expecting '------' separator before first revision
if re_31.match(line):
state = 5
else:
assert not re_32.match(line), _('must have at least '
'some revisions')
elif state == 5:
# expecting revision number and possibly (ignored) lock indication
# we create the logentry here from values stored in states 0 to 4,
# as this state is re-entered for subsequent revisions of a file.
match = re_50.match(line)
assert match, _('expected revision number')
e = logentry(rcs=scache(rcs), file=scache(filename),
revision=tuple([int(x) for x in match.group(1).split('.')]),
branches=[], parent=None,
synthetic=False)
state = 6
elif state == 6:
# expecting date, author, state, lines changed
match = re_60.match(line)
assert match, _('revision must be followed by date line')
d = match.group(1)
if d[2] == '/':
# Y2K
d = '19' + d
if len(d.split()) != 3:
# cvs log dates always in GMT
d = d + ' UTC'
e.date = util.parsedate(d, ['%y/%m/%d %H:%M:%S',
'%Y/%m/%d %H:%M:%S',
'%Y-%m-%d %H:%M:%S'])
e.author = scache(match.group(2))
e.dead = match.group(3).lower() == 'dead'
if match.group(5):
if match.group(6):
e.lines = (int(match.group(5)), int(match.group(6)))
else:
e.lines = (int(match.group(5)), 0)
elif match.group(6):
e.lines = (0, int(match.group(6)))
else:
e.lines = None
if match.group(7): # cvsnt mergepoint
myrev = match.group(8).split('.')
if len(myrev) == 2: # head
e.mergepoint = 'HEAD'
else:
myrev = '.'.join(myrev[:-2] + ['0', myrev[-2]])
branches = [b for b in branchmap if branchmap[b] == myrev]
assert len(branches) == 1, 'unknown branch: %s' % e.mergepoint
e.mergepoint = branches[0]
else:
e.mergepoint = None
e.comment = []
state = 7
elif state == 7:
# read the revision numbers of branches that start at this revision
# or store the commit log message otherwise
m = re_70.match(line)
if m:
e.branches = [tuple([int(y) for y in x.strip().split('.')])
for x in m.group(1).split(';')]
state = 8
elif re_31.match(line) and re_50.match(peek):
state = 5
store = True
elif re_32.match(line):
state = 0
store = True
else:
e.comment.append(line)
elif state == 8:
# store commit log message
if re_31.match(line):
state = 5
store = True
elif re_32.match(line):
state = 0
store = True
else:
e.comment.append(line)
# When a file is added on a branch B1, CVS creates a synthetic
# dead trunk revision 1.1 so that the branch has a root.
# Likewise, if you merge such a file to a later branch B2 (one
# that already existed when the file was added on B1), CVS
# creates a synthetic dead revision 1.1.x.1 on B2. Don't drop
# these revisions now, but mark them synthetic so
# createchangeset() can take care of them.
if (store and
e.dead and
e.revision[-1] == 1 and # 1.1 or 1.1.x.1
len(e.comment) == 1 and
file_added_re.match(e.comment[0])):
ui.debug(_('found synthetic revision in %s: %r\n')
% (e.rcs, e.comment[0]))
e.synthetic = True
if store:
# clean up the results and save in the log.
store = False
e.tags = sorted([scache(x) for x in tags.get(e.revision, [])])
e.comment = scache('\n'.join(e.comment))
revn = len(e.revision)
if revn > 3 and (revn % 2) == 0:
e.branch = tags.get(e.revision[:-1], [None])[0]
else:
e.branch = None
# find the branches starting from this revision
branchpoints = set()
for branch, revision in branchmap.iteritems():
revparts = tuple([int(i) for i in revision.split('.')])
if revparts[-2] == 0 and revparts[-1] % 2 == 0:
# normal branch
if revparts[:-2] == e.revision:
branchpoints.add(branch)
elif revparts == (1,1,1): # vendor branch
if revparts in e.branches:
branchpoints.add(branch)
e.branchpoints = branchpoints
log.append(e)
if len(log) % 100 == 0:
ui.status(util.ellipsis('%d %s' % (len(log), e.file), 80)+'\n')
log.sort(key=lambda x: (x.rcs, x.revision))
# find parent revisions of individual files
versions = {}
for e in log:
branch = e.revision[:-1]
p = versions.get((e.rcs, branch), None)
if p is None:
p = e.revision[:-2]
e.parent = p
versions[(e.rcs, branch)] = e.revision
# update the log cache
if cache:
if log:
# join up the old and new logs
log.sort(key=lambda x: x.date)
if oldlog and oldlog[-1].date >= log[0].date:
raise logerror('Log cache overlaps with new log entries,'
' re-run without cache.')
log = oldlog + log
# write the new cachefile
ui.note(_('writing cvs log cache %s\n') % cachefile)
pickle.dump(log, open(cachefile, 'w'))
else:
log = oldlog
ui.status(_('%d log entries\n') % len(log))
return log
class changeset(object):
'''Class changeset has the following attributes:
.id - integer identifying this changeset (list index)
.author - author name as CVS knows it
.branch - name of branch this changeset is on, or None
.comment - commit message
.date - the commit date as a (time,tz) tuple
.entries - list of logentry objects in this changeset
.parents - list of one or two parent changesets
.tags - list of tags on this changeset
.synthetic - from synthetic revision "file ... added on branch ..."
.mergepoint- the branch that has been merged from
(if present in rlog output)
.branchpoints- the branches that start at the current entry
'''
def __init__(self, **entries):
self.__dict__.update(entries)
def __repr__(self):
return "<%s at 0x%x: %s>" % (self.__class__.__name__,
id(self),
getattr(self, 'id', "(no id)"))
def createchangeset(ui, log, fuzz=60, mergefrom=None, mergeto=None):
'''Convert log into changesets.'''
ui.status(_('creating changesets\n'))
# Merge changesets
log.sort(key=lambda x: (x.comment, x.author, x.branch, x.date))
changesets = []
files = set()
c = None
for i, e in enumerate(log):
# Check if log entry belongs to the current changeset or not.
# Since CVS is file centric, two different file revisions with
# different branchpoints should be treated as belonging to two
# different changesets (and the ordering is important and not
# honoured by cvsps at this point).
#
# Consider the following case:
# foo 1.1 branchpoints: [MYBRANCH]
# bar 1.1 branchpoints: [MYBRANCH, MYBRANCH2]
#
# Here foo is part only of MYBRANCH, but not MYBRANCH2, e.g. a
# later version of foo may be in MYBRANCH2, so foo should be the
# first changeset and bar the next and MYBRANCH and MYBRANCH2
# should both start off of the bar changeset. No provisions are
# made to ensure that this is, in fact, what happens.
if not (c and
e.comment == c.comment and
e.author == c.author and
e.branch == c.branch and
(not hasattr(e, 'branchpoints') or
not hasattr (c, 'branchpoints') or
e.branchpoints == c.branchpoints) and
((c.date[0] + c.date[1]) <=
(e.date[0] + e.date[1]) <=
(c.date[0] + c.date[1]) + fuzz) and
e.file not in files):
c = changeset(comment=e.comment, author=e.author,
branch=e.branch, date=e.date, entries=[],
mergepoint=getattr(e, 'mergepoint', None),
branchpoints=getattr(e, 'branchpoints', set()))
changesets.append(c)
files = set()
if len(changesets) % 100 == 0:
t = '%d %s' % (len(changesets), repr(e.comment)[1:-1])
ui.status(util.ellipsis(t, 80) + '\n')
c.entries.append(e)
files.add(e.file)
c.date = e.date # changeset date is date of latest commit in it
# Mark synthetic changesets
for c in changesets:
# Synthetic revisions always get their own changeset, because
# the log message includes the filename. E.g. if you add file3
# and file4 on a branch, you get four log entries and three
# changesets:
# "File file3 was added on branch ..." (synthetic, 1 entry)
# "File file4 was added on branch ..." (synthetic, 1 entry)
# "Add file3 and file4 to fix ..." (real, 2 entries)
# Hence the check for 1 entry here.
synth = getattr(c.entries[0], 'synthetic', None)
c.synthetic = (len(c.entries) == 1 and synth)
# Sort files in each changeset
for c in changesets:
def pathcompare(l, r):
'Mimic cvsps sorting order'
l = l.split('/')
r = r.split('/')
nl = len(l)
nr = len(r)
n = min(nl, nr)
for i in range(n):
if i + 1 == nl and nl < nr:
return -1
elif i + 1 == nr and nl > nr:
return +1
elif l[i] < r[i]:
return -1
elif l[i] > r[i]:
return +1
return 0
def entitycompare(l, r):
return pathcompare(l.file, r.file)
c.entries.sort(entitycompare)
# Sort changesets by date
def cscmp(l, r):
d = sum(l.date) - sum(r.date)
if d:
return d
# detect vendor branches and initial commits on a branch
le = {}
for e in l.entries:
le[e.rcs] = e.revision
re = {}
for e in r.entries:
re[e.rcs] = e.revision
d = 0
for e in l.entries:
if re.get(e.rcs, None) == e.parent:
assert not d
d = 1
break
for e in r.entries:
if le.get(e.rcs, None) == e.parent:
assert not d
d = -1
break
return d
changesets.sort(cscmp)
# Collect tags
globaltags = {}
for c in changesets:
for e in c.entries:
for tag in e.tags:
# remember which is the latest changeset to have this tag
globaltags[tag] = c
for c in changesets:
tags = set()
for e in c.entries:
tags.update(e.tags)
# remember tags only if this is the latest changeset to have it
c.tags = sorted(tag for tag in tags if globaltags[tag] is c)
# Find parent changesets, handle {{mergetobranch BRANCHNAME}}
# by inserting dummy changesets with two parents, and handle
# {{mergefrombranch BRANCHNAME}} by setting two parents.
if mergeto is None:
mergeto = r'{{mergetobranch ([-\w]+)}}'
if mergeto:
mergeto = re.compile(mergeto)
if mergefrom is None:
mergefrom = r'{{mergefrombranch ([-\w]+)}}'
if mergefrom:
mergefrom = re.compile(mergefrom)
versions = {} # changeset index where we saw any particular file version
branches = {} # changeset index where we saw a branch
n = len(changesets)
i = 0
while i<n:
c = changesets[i]
for f in c.entries:
versions[(f.rcs, f.revision)] = i
p = None
if c.branch in branches:
p = branches[c.branch]
else:
# first changeset on a new branch
# the parent is a changeset with the branch in its
# branchpoints such that it is the latest possible
# commit without any intervening, unrelated commits.
for candidate in xrange(i):
if c.branch not in changesets[candidate].branchpoints:
if p is not None:
break
continue
p = candidate
c.parents = []
if p is not None:
p = changesets[p]
# Ensure no changeset has a synthetic changeset as a parent.
while p.synthetic:
assert len(p.parents) <= 1, \
_('synthetic changeset cannot have multiple parents')
if p.parents:
p = p.parents[0]
else:
p = None
break
if p is not None:
c.parents.append(p)
if c.mergepoint:
if c.mergepoint == 'HEAD':
c.mergepoint = None
c.parents.append(changesets[branches[c.mergepoint]])
if mergefrom:
m = mergefrom.search(c.comment)
if m:
m = m.group(1)
if m == 'HEAD':
m = None
try:
candidate = changesets[branches[m]]
except KeyError:
ui.warn(_("warning: CVS commit message references "
"non-existent branch %r:\n%s\n")
% (m, c.comment))
if m in branches and c.branch != m and not candidate.synthetic:
c.parents.append(candidate)
if mergeto:
m = mergeto.search(c.comment)
if m:
try:
m = m.group(1)
if m == 'HEAD':
m = None
except:
m = None # if no group found then merge to HEAD
if m in branches and c.branch != m:
# insert empty changeset for merge
cc = changeset(author=c.author, branch=m, date=c.date,
comment='convert-repo: CVS merge from branch %s' % c.branch,
entries=[], tags=[], parents=[changesets[branches[m]], c])
changesets.insert(i + 1, cc)
branches[m] = i + 1
# adjust our loop counters now we have inserted a new entry
n += 1
i += 2
continue
branches[c.branch] = i
i += 1
# Drop synthetic changesets (safe now that we have ensured no other
# changesets can have them as parents).
i = 0
while i < len(changesets):
if changesets[i].synthetic:
del changesets[i]
else:
i += 1
# Number changesets
for i, c in enumerate(changesets):
c.id = i + 1
ui.status(_('%d changeset entries\n') % len(changesets))
return changesets
def debugcvsps(ui, *args, **opts):
'''Read CVS rlog for current directory or named path in
repository, and convert the log to changesets based on matching
commit log entries and dates.
'''
if opts["new_cache"]:
cache = "write"
elif opts["update_cache"]:
cache = "update"
else:
cache = None
revisions = opts["revisions"]
try:
if args:
log = []
for d in args:
log += createlog(ui, d, root=opts["root"], cache=cache)
else:
log = createlog(ui, root=opts["root"], cache=cache)
except logerror, e:
ui.write("%r\n"%e)
return
changesets = createchangeset(ui, log, opts["fuzz"])
del log
# Print changesets (optionally filtered)
off = len(revisions)
branches = {} # latest version number in each branch
ancestors = {} # parent branch
for cs in changesets:
if opts["ancestors"]:
if cs.branch not in branches and cs.parents and cs.parents[0].id:
ancestors[cs.branch] = (changesets[cs.parents[0].id-1].branch,
cs.parents[0].id)
branches[cs.branch] = cs.id
# limit by branches
if opts["branches"] and (cs.branch or 'HEAD') not in opts["branches"]:
continue
if not off:
# Note: trailing spaces on several lines here are needed to have
# bug-for-bug compatibility with cvsps.
ui.write('---------------------\n')
ui.write('PatchSet %d \n' % cs.id)
ui.write('Date: %s\n' % util.datestr(cs.date,
'%Y/%m/%d %H:%M:%S %1%2'))
ui.write('Author: %s\n' % cs.author)
ui.write('Branch: %s\n' % (cs.branch or 'HEAD'))
ui.write('Tag%s: %s \n' % (['', 's'][len(cs.tags)>1],
','.join(cs.tags) or '(none)'))
branchpoints = getattr(cs, 'branchpoints', None)
if branchpoints:
ui.write('Branchpoints: %s \n' % ', '.join(branchpoints))
if opts["parents"] and cs.parents:
if len(cs.parents)>1:
ui.write('Parents: %s\n' % (','.join([str(p.id) for p in cs.parents])))
else:
ui.write('Parent: %d\n' % cs.parents[0].id)
if opts["ancestors"]:
b = cs.branch
r = []
while b:
b, c = ancestors[b]
r.append('%s:%d:%d' % (b or "HEAD", c, branches[b]))
if r:
ui.write('Ancestors: %s\n' % (','.join(r)))
ui.write('Log:\n')
ui.write('%s\n\n' % cs.comment)
ui.write('Members: \n')
for f in cs.entries:
fn = f.file
if fn.startswith(opts["prefix"]):
fn = fn[len(opts["prefix"]):]
ui.write('\t%s:%s->%s%s \n' % (fn, '.'.join([str(x) for x in f.parent]) or 'INITIAL',
'.'.join([str(x) for x in f.revision]), ['', '(DEAD)'][f.dead]))
ui.write('\n')
# have we seen the start tag?
if revisions and off:
if revisions[0] == str(cs.id) or \
revisions[0] in cs.tags:
off = False
# see if we reached the end tag
if len(revisions)>1 and not off:
if revisions[1] == str(cs.id) or \
revisions[1] in cs.tags:
break