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cvslib.py
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"""Utilities for CVS administration.""" import string import os import time import md5 import fnmatch if not hasattr(time, 'timezone'): time.timezone = 0 class File: """Represent a file's status. Instance variables: file -- the filename (no slashes), None if uninitialized lseen -- true if the data for the local file is up to date eseen -- true if the data from the CVS/Entries entry is up to date (this implies that the entry must be written back) rseen -- true if the data for the remote file is up to date proxy -- RCSProxy instance used to contact the server, or None Note that lseen and rseen don't necessary mean that a local or remote file *exists* -- they indicate that we've checked it. However, eseen means that this instance corresponds to an entry in the CVS/Entries file. If lseen is true: lsum -- checksum of the local file, None if no local file lctime -- ctime of the local file, None if no local file lmtime -- mtime of the local file, None if no local file If eseen is true: erev -- revision, None if this is a no revision (not '0') enew -- true if this is an uncommitted added file edeleted -- true if this is an uncommitted removed file ectime -- ctime of last local file corresponding to erev emtime -- mtime of last local file corresponding to erev extra -- 5th string from CVS/Entries file If rseen is true: rrev -- revision of head, None if non-existent rsum -- checksum of that revision, Non if non-existent If eseen and rseen are both true: esum -- checksum of revision erev, None if no revision Note """ def __init__(self, file = None): if file and '/' in file: raise ValueError, "no slash allowed in file" self.file = file self.lseen = self.eseen = self.rseen = 0 self.proxy = None def __cmp__(self, other): return cmp(self.file, other.file) def getlocal(self): try: self.lmtime, self.lctime = os.stat(self.file)[-2:] except os.error: self.lmtime = self.lctime = self.lsum = None else: self.lsum = md5.new(open(self.file).read()).digest() self.lseen = 1 def getentry(self, line): words = string.splitfields(line, '/') if self.file and words[1] != self.file: raise ValueError, "file name mismatch" self.file = words[1] self.erev = words[2] self.edeleted = 0 self.enew = 0 self.ectime = self.emtime = None if self.erev[:1] == '-': self.edeleted = 1 self.erev = self.erev[1:] if self.erev == '0': self.erev = None self.enew = 1 else: dates = words[3] self.ectime = unctime(dates[:24]) self.emtime = unctime(dates[25:]) self.extra = words[4] if self.rseen: self.getesum() self.eseen = 1 def getremote(self, proxy = None): if proxy: self.proxy = proxy try: self.rrev = self.proxy.head(self.file) except (os.error, IOError): self.rrev = None if self.rrev: self.rsum = self.proxy.sum(self.file) else: self.rsum = None if self.eseen: self.getesum() self.rseen = 1 def getesum(self): if self.erev == self.rrev: self.esum = self.rsum elif self.erev: name = (self.file, self.erev) self.esum = self.proxy.sum(name) else: self.esum = None def putentry(self): """Return a line suitable for inclusion in CVS/Entries. The returned line is terminated by a newline. If no entry should be written for this file, return "". """ if not self.eseen: return "" rev = self.erev or '0' if self.edeleted: rev = '-' + rev if self.enew: dates = 'Initial ' + self.file else: dates = gmctime(self.ectime) + ' ' + \ gmctime(self.emtime) return "/%s/%s/%s/%s/\n" % ( self.file, rev, dates, self.extra) def report(self): print '-'*50 def r(key, repr=repr, self=self): try: value = repr(getattr(self, key)) except AttributeError: value = "?" print "%-15s:" % key, value r("file") if self.lseen: r("lsum", hexify) r("lctime", gmctime) r("lmtime", gmctime) if self.eseen: r("erev") r("enew") r("edeleted") r("ectime", gmctime) r("emtime", gmctime) if self.rseen: r("rrev") r("rsum", hexify) if self.eseen: r("esum", hexify) class CVS: """Represent the contents of a CVS admin file (and more). Class variables: FileClass -- the class to be instantiated for entries (this should be derived from class File above) IgnoreList -- shell patterns for local files to be ignored Instance variables: entries -- a dictionary containing File instances keyed by their file name proxy -- an RCSProxy instance, or None """ FileClass = File IgnoreList = ['.*', '@*', ',*', '*~', '*.o', '*.a', '*.so', '*.pyc'] def __init__(self): self.entries = {} self.proxy = None def setproxy(self, proxy): if proxy is self.proxy: return self.proxy = proxy for e in self.entries.values(): e.rseen = 0 def getentries(self): """Read the contents of CVS/Entries""" self.entries = {} f = self.cvsopen("Entries") while 1: line = f.readline() if not line: break e = self.FileClass() e.getentry(line) self.entries[e.file] = e f.close() def putentries(self): """Write CVS/Entries back""" f = self.cvsopen("Entries", 'w') for e in self.values(): f.write(e.putentry()) f.close() def getlocalfiles(self): list = self.entries.keys() addlist = os.listdir(os.curdir) for name in addlist: if name in list: continue if not self.ignored(name): list.append(name) list.sort() for file in list: try: e = self.entries[file] except KeyError: e = self.entries[file] = self.FileClass(file) e.getlocal() def getremotefiles(self, proxy = None): if proxy: self.proxy = proxy if not self.proxy: raise RuntimeError, "no RCS proxy" addlist = self.proxy.listfiles() for file in addlist: try: e = self.entries[file] except KeyError: e = self.entries[file] = self.FileClass(file) e.getremote(self.proxy) def report(self): for e in self.values(): e.report() print '-'*50 def keys(self): keys = self.entries.keys() keys.sort() return keys def values(self): def value(key, self=self): return self.entries[key] return map(value, self.keys()) def items(self): def item(key, self=self): return (key, self.entries[key]) return map(item, self.keys()) def cvsexists(self, file): file = os.path.join("CVS", file) return os.path.exists(file) def cvsopen(self, file, mode = 'r'): file = os.path.join("CVS", file) if 'r' not in mode: self.backup(file) return open(file, mode) def backup(self, file): if os.path.isfile(file): bfile = file + '~' try: os.unlink(bfile) except os.error: pass os.rename(file, bfile) def ignored(self, file): if os.path.isdir(file): return True for pat in self.IgnoreList: if fnmatch.fnmatch(file, pat): return True return False # hexify and unhexify are useful to print MD5 checksums in hex format hexify_format = '%02x' * 16 def hexify(sum): "Return a hex representation of a 16-byte string (e.g. an MD5 digest)" if sum is None: return "None" return hexify_format % tuple(map(ord, sum)) def unhexify(hexsum): "Return the original from a hexified string" if hexsum == "None": return None sum = '' for i in range(0, len(hexsum), 2): sum = sum + chr(string.atoi(hexsum[i:i+2], 16)) return sum unctime_monthmap = {} def unctime(date): if date == "None": return None if not unctime_monthmap: months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'] i = 0 for m in months: i = i+1 unctime_monthmap[m] = i words = string.split(date) # Day Mon DD HH:MM:SS YEAR year = string.atoi(words[4]) month = unctime_monthmap[words[1]] day = string.atoi(words[2]) [hh, mm, ss] = map(string.atoi, string.splitfields(words[3], ':')) ss = ss - time.timezone return time.mktime((year, month, day, hh, mm, ss, 0, 0, 0)) def gmctime(t): if t is None: return "None" return time.asctime(time.gmtime(t)) def test_unctime(): now = int(time.time()) t = time.gmtime(now) at = time.asctime(t) print 'GMT', now, at print 'timezone', time.timezone print 'local', time.ctime(now) u = unctime(at) print 'unctime()', u gu = time.gmtime(u) print '->', gu print time.asctime(gu) def test(): x = CVS() x.getentries() x.getlocalfiles() ## x.report() import rcsclient proxy = rcsclient.openrcsclient() x.getremotefiles(proxy) x.report() if __name__ == "__main__": test()