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- """RCS interface module.
-
- Defines the class RCS, which represents a directory with rcs version
- files and (possibly) corresponding work files.
-
- """
-
-
- import fnmatch
- import os
- import regsub
- import string
- import tempfile
-
-
- class RCS:
-
- """RCS interface class (local filesystem version).
-
- An instance of this class represents a directory with rcs version
- files and (possible) corresponding work files.
-
- Methods provide access to most rcs operations such as
- checkin/checkout, access to the rcs metadata (revisions, logs,
- branches etc.) as well as some filesystem operations such as
- listing all rcs version files.
-
- XXX BUGS / PROBLEMS
-
- - The instance always represents the current directory so it's not
- very useful to have more than one instance around simultaneously
-
- """
-
- # Characters allowed in work file names
- okchars = string.letters + string.digits + '-_=+.'
-
- def __init__(self):
- """Constructor."""
- pass
-
- def __del__(self):
- """Destructor."""
- pass
-
- # --- Informational methods about a single file/revision ---
-
- def log(self, name_rev, otherflags = ''):
- """Return the full log text for NAME_REV as a string.
-
- Optional OTHERFLAGS are passed to rlog.
-
- """
- f = self._open(name_rev, 'rlog ' + otherflags)
- data = f.read()
- status = self._closepipe(f)
- if status:
- data = data + "%s: %s" % status
- elif data[-1] == '\n':
- data = data[:-1]
- return data
-
- def head(self, name_rev):
- """Return the head revision for NAME_REV"""
- dict = self.info(name_rev)
- return dict['head']
-
- def info(self, name_rev):
- """Return a dictionary of info (from rlog -h) for NAME_REV
-
- The dictionary's keys are the keywords that rlog prints
- (e.g. 'head' and its values are the corresponding data
- (e.g. '1.3').
-
- XXX symbolic names and locks are not returned
-
- """
- f = self._open(name_rev, 'rlog -h')
- dict = {}
- while 1:
- line = f.readline()
- if not line: break
- if line[0] == '\t':
- # XXX could be a lock or symbolic name
- # Anything else?
- continue
- i = string.find(line, ':')
- if i > 0:
- key, value = line[:i], string.strip(line[i+1:])
- dict[key] = value
- status = self._closepipe(f)
- if status:
- raise IOError, status
- return dict
-
- # --- Methods that change files ---
-
- def lock(self, name_rev):
- """Set an rcs lock on NAME_REV."""
- name, rev = self.checkfile(name_rev)
- cmd = "rcs -l%s %s" % (rev, name)
- return self._system(cmd)
-
- def unlock(self, name_rev):
- """Clear an rcs lock on NAME_REV."""
- name, rev = self.checkfile(name_rev)
- cmd = "rcs -u%s %s" % (rev, name)
- return self._system(cmd)
-
- def checkout(self, name_rev, withlock=0, otherflags=""):
- """Check out NAME_REV to its work file.
-
- If optional WITHLOCK is set, check out locked, else unlocked.
-
- The optional OTHERFLAGS is passed to co without
- interpretation.
-
- Any output from co goes to directly to stdout.
-
- """
- name, rev = self.checkfile(name_rev)
- if withlock: lockflag = "-l"
- else: lockflag = "-u"
- cmd = 'co %s%s %s %s' % (lockflag, rev, otherflags, name)
- return self._system(cmd)
-
- def checkin(self, name_rev, message=None, otherflags=""):
- """Check in NAME_REV from its work file.
-
- The optional MESSAGE argument becomes the checkin message
- (default "<none>" if None); or the file description if this is
- a new file.
-
- The optional OTHERFLAGS argument is passed to ci without
- interpretation.
-
- Any output from ci goes to directly to stdout.
-
- """
- name, rev = self._unmangle(name_rev)
- new = not self.isvalid(name)
- if not message: message = "<none>"
- if message and message[-1] != '\n':
- message = message + '\n'
- lockflag = "-u"
- textfile = None
- try:
- if new:
- textfile = tempfile.mktemp()
- f = open(textfile, 'w')
- f.write(message)
- f.close()
- cmd = 'ci %s%s -t%s %s %s' % \
- (lockflag, rev, textfile, otherflags, name)
- else:
- message = regsub.gsub('\([\\"$`]\)', '\\\\\\1', message)
- cmd = 'ci %s%s -m"%s" %s %s' % \
- (lockflag, rev, message, otherflags, name)
- return self._system(cmd)
- finally:
- if textfile: self._remove(textfile)
-
- # --- Exported support methods ---
-
- def listfiles(self, pat = None):
- """Return a list of all version files matching optional PATTERN."""
- files = os.listdir(os.curdir)
- files = filter(self._isrcs, files)
- if os.path.isdir('RCS'):
- files2 = os.listdir('RCS')
- files2 = filter(self._isrcs, files2)
- files = files + files2
- files = map(self.realname, files)
- return self._filter(files, pat)
-
- def isvalid(self, name):
- """Test whether NAME has a version file associated."""
- namev = self.rcsname(name)
- return (os.path.isfile(namev) or
- os.path.isfile(os.path.join('RCS', namev)))
-
- def rcsname(self, name):
- """Return the pathname of the version file for NAME.
-
- The argument can be a work file name or a version file name.
- If the version file does not exist, the name of the version
- file that would be created by "ci" is returned.
-
- """
- if self._isrcs(name): namev = name
- else: namev = name + ',v'
- if os.path.isfile(namev): return namev
- namev = os.path.join('RCS', os.path.basename(namev))
- if os.path.isfile(namev): return namev
- if os.path.isdir('RCS'):
- return os.path.join('RCS', namev)
- else:
- return namev
-
- def realname(self, namev):
- """Return the pathname of the work file for NAME.
-
- The argument can be a work file name or a version file name.
- If the work file does not exist, the name of the work file
- that would be created by "co" is returned.
-
- """
- if self._isrcs(namev): name = namev[:-2]
- else: name = namev
- if os.path.isfile(name): return name
- name = os.path.basename(name)
- return name
-
- def islocked(self, name_rev):
- """Test whether FILE (which must have a version file) is locked.
-
- XXX This does not tell you which revision number is locked and
- ignores any revision you may pass in (by virtue of using rlog
- -L -R).
-
- """
- f = self._open(name_rev, 'rlog -L -R')
- line = f.readline()
- status = self._closepipe(f)
- if status:
- raise IOError, status
- if not line: return None
- return self.realname(name_rev) == self.realname(line)
-
- def checkfile(self, name_rev):
- """Normalize NAME_REV into a (NAME, REV) tuple.
-
- Raise an exception if there is no corresponding version file.
-
- """
- name, rev = self._unmangle(name_rev)
- if not self.isvalid(name):
- raise os.error, 'not an rcs file %s' % `name`
- return name, rev
-
- # --- Internal methods ---
-
- def _open(self, name_rev, cmd = 'co -p', rflag = '-r'):
- """INTERNAL: open a read pipe to NAME_REV using optional COMMAND.
-
- Optional FLAG is used to indicate the revision (default -r).
-
- Default COMMAND is "co -p".
-
- Return a file object connected by a pipe to the command's
- output.
-
- """
- name, rev = self.checkfile(name_rev)
- namev = self.rcsname(name)
- if rev:
- cmd = cmd + ' ' + rflag + rev
- return os.popen("%s %s" % (cmd, `namev`))
-
- def _unmangle(self, name_rev):
- """INTERNAL: Normalize NAME_REV argument to (NAME, REV) tuple.
-
- Raise an exception if NAME contains invalid characters.
-
- A NAME_REV argument is either NAME string (implying REV='') or
- a tuple of the form (NAME, REV).
-
- """
- if type(name_rev) == type(''):
- name_rev = name, rev = name_rev, ''
- else:
- name, rev = name_rev
- for c in rev:
- if c not in self.okchars:
- raise ValueError, "bad char in rev"
- return name_rev
-
- def _closepipe(self, f):
- """INTERNAL: Close PIPE and print its exit status if nonzero."""
- sts = f.close()
- if not sts: return None
- detail, reason = divmod(sts, 256)
- if reason == 0: return 'exit', detail # Exit status
- signal = reason&0x7F
- if signal == 0x7F:
- code = 'stopped'
- signal = detail
- else:
- code = 'killed'
- if reason&0x80:
- code = code + '(coredump)'
- return code, signal
-
- def _system(self, cmd):
- """INTERNAL: run COMMAND in a subshell.
-
- Standard input for the command is taken fron /dev/null.
-
- Raise IOError when the exit status is not zero.
-
- Return whatever the calling method should return; normally
- None.
-
- A derived class may override this method and redefine it to
- capture stdout/stderr of the command and return it.
-
- """
- cmd = cmd + " </dev/null"
- sts = os.system(cmd)
- if sts: raise IOError, "command exit status %d" % sts
-
- def _filter(self, files, pat = None):
- """INTERNAL: Return a sorted copy of the given list of FILES.
-
- If a second PATTERN argument is given, only files matching it
- are kept. No check for valid filenames is made.
-
- """
- if pat:
- def keep(name, pat = pat):
- return fnmatch.fnmatch(name, pat)
- files = filter(keep, files)
- else:
- files = files[:]
- files.sort()
- return files
-
- def _remove(self, fn):
- """INTERNAL: remove FILE without complaints."""
- try:
- os.unlink(fn)
- except os.error:
- pass
-
- def _isrcs(self, name):
- """INTERNAL: Test whether NAME ends in ',v'."""
- return name[-2:] == ',v'
-