Whitespace, tab and formatting cleanups, mainly in mq.py

hgext/mq.py

@@ -1,1286 +1,1308 b''
 #!/usr/bin/env python
 # queue.py - patch queues for mercurial
 #
 # Copyright 2005 Chris Mason <[e-mail]>
 #
 # This software may be used and distributed according to the terms
 # of the GNU General Public License, incorporated herein by reference.
 
 from mercurial.demandload import *
 demandload(globals(), "os sys re struct traceback errno bz2")
 from mercurial.i18n import gettext as _
 from mercurial import ui, hg, revlog, commands, util
 
 versionstr = "0.45"
 
 repomap = {}
 
 class queue:
     def __init__(self, ui, path, patchdir=None):
         self.opener = util.opener(path)
         self.basepath = path
         if patchdir:
             self.path = patchdir
         else:
             self.path = os.path.join(path, "patches")
         self.ui = ui
         self.applied = []
         self.full_series = []
         self.applied_dirty = 0
         self.series_dirty = 0
         self.series_path = os.path.join(self.path, "series")
         self.status_path = os.path.join(self.path, "status")
-        
+
         s = self.series_path
         if os.path.exists(s):
             self.full_series = self.opener(s).read().splitlines()
         self.read_series(self.full_series)
 
         s = self.status_path
         if os.path.exists(s):
             self.applied = self.opener(s).read().splitlines()
 
     def find_series(self, patch):
         pre = re.compile("(\s*)([^#]+)")
         index = 0
         for l in self.full_series:
             m = pre.match(l)
             if m:
                 s = m.group(2)
                 s = s.rstrip()
                 if s == patch:
                     return index
             index += 1
         return None
 
     def read_series(self, list):
         def matcher(list):
             pre = re.compile("(\s*)([^#]+)")
             for l in list:
                 m = pre.match(l)
                 if m:
                     s = m.group(2)
                     s = s.rstrip()
                     if len(s) > 0:
                         yield s
         self.series = []
         self.series = [ x for x in matcher(list) ]
-        
+
     def save_dirty(self):
         if self.applied_dirty:
             if len(self.applied) > 0:
                 nl = "\n"
             else:
                 nl = ""
             f = self.opener(self.status_path, "w")
             f.write("\n".join(self.applied) + nl)
         if self.series_dirty:
             if len(self.full_series) > 0:
                 nl = "\n"
             else:
                 nl = ""
             f = self.opener(self.series_path, "w")
             f.write("\n".join(self.full_series) + nl)
 
     def readheaders(self, patch):
         def eatdiff(lines):
             while lines:
                 l = lines[-1]
-                if l.startswith("diff -") or \
-                   l.startswith("Index:") or \
-                   l.startswith("==========="):
+                if (l.startswith("diff -") or
+                    l.startswith("Index:") or
+                    l.startswith("===========")):
                     del lines[-1]
                 else:
                     break
         def eatempty(lines):
             while lines:
                 l = lines[-1]
                 if re.match('\s*$', l):
                     del lines[-1]
                 else:
                     break
 
         pf = os.path.join(self.path, patch)
         message = []
         comments = []
         user = None
         format = None
         subject = None
         diffstart = 0
 
         for line in file(pf):
             line = line.rstrip()
             if diffstart:
                 if line.startswith('+++ '):
                     diffstart = 2
                 break
             if line.startswith("--- "):
                 diffstart = 1
                 continue
             elif format == "hgpatch":
                 # parse values when importing the result of an hg export
                 if line.startswith("# User "):
                     user = line[7:]
                 elif not line.startswith("# ") and line:
                     message.append(line)
                     format = None
             elif line == '# HG changeset patch':
                 format = "hgpatch"
-            elif format != "tagdone" and \
-                 (line.startswith("Subject: ") or \
-                 line.startswith("subject: ")):
+            elif (format != "tagdone" and (line.startswith("Subject: ") or
+                                           line.startswith("subject: "))):
                 subject = line[9:]
                 format = "tag"
-            elif format != "tagdone" and \
-                 (line.startswith("From: ") or \
-                 line.startswith("from: ")):
+            elif (format != "tagdone" and (line.startswith("From: ") or
+                                           line.startswith("from: "))):
                 user = line[6:]
                 format = "tag"
             elif format == "tag" and line == "":
                 # when looking for tags (subject: from: etc) they
                 # end once you find a blank line in the source
                 format = "tagdone"
             else:
                 message.append(line)
             comments.append(line)
 
         eatdiff(message)
         eatdiff(comments)
         eatempty(message)
         eatempty(comments)
 
         # make sure message isn't empty
         if format and format.startswith("tag") and subject:
             message.insert(0, "")
             message.insert(0, subject)
         return (message, comments, user, diffstart > 1)
 
     def mergeone(self, repo, mergeq, head, patch, rev, wlock):
         # first try just applying the patch
-        (err, n) = self.apply(repo, [ patch ], update_status=False, 
+        (err, n) = self.apply(repo, [ patch ], update_status=False,
                               strict=True, merge=rev, wlock=wlock)
 
         if err == 0:
             return (err, n)
 
         if n is None:
             self.ui.warn("apply failed for patch %s\n" % patch)
             sys.exit(1)
 
         self.ui.warn("patch didn't work out, merging %s\n" % patch)
 
         # apply failed, strip away that rev and merge.
         repo.update(head, allow=False, force=True, wlock=wlock)
         self.strip(repo, n, update=False, backup='strip', wlock=wlock)
 
         c = repo.changelog.read(rev)
         ret = repo.update(rev, allow=True, wlock=wlock)
         if ret:
             self.ui.warn("update returned %d\n" % ret)
             sys.exit(1)
         n = repo.commit(None, c[4], c[1], force=1, wlock=wlock)
         if n == None:
             self.ui.warn("repo commit failed\n")
             sys.exit(1)
         try:
             message, comments, user, patchfound = mergeq.readheaders(patch)
         except:
             self.ui.warn("Unable to read %s\n" % patch)
             sys.exit(1)
 
         patchf = self.opener(os.path.join(self.path, patch), "w")
         if comments:
             comments = "\n".join(comments) + '\n\n'
             patchf.write(comments)
         commands.dodiff(patchf, self.ui, repo, head, n)
         patchf.close()
         return (0, n)
-        
+
     def qparents(self, repo, rev=None):
         if rev is None:
             (p1, p2) = repo.dirstate.parents()
             if p2 == revlog.nullid:
                 return p1
             if len(self.applied) == 0:
                 return None
             (top, patch) = self.applied[-1].split(':')
             top = revlog.bin(top)
             return top
         pp = repo.changelog.parents(rev)
         if pp[1] != revlog.nullid:
             arevs = [ x.split(':')[0] for x in self.applied ]
             p0 = revlog.hex(pp[0])
             p1 = revlog.hex(pp[1])
             if p0 in arevs:
                 return pp[0]
             if p1 in arevs:
                 return pp[1]
             return None
         return pp[0]
 
     def mergepatch(self, repo, mergeq, series, wlock):
         if len(self.applied) == 0:
             # each of the patches merged in will have two parents.  This
             # can confuse the qrefresh, qdiff, and strip code because it
             # needs to know which parent is actually in the patch queue.
             # so, we insert a merge marker with only one parent.  This way
             # the first patch in the queue is never a merge patch
             #
             pname = ".hg.patches.merge.marker"
             n = repo.commit(None, '[mq]: merge marker', user=None, force=1,
                             wlock=wlock)
             self.applied.append(revlog.hex(n) + ":" + pname)
             self.applied_dirty = 1
 
         head = self.qparents(repo)
 
         for patch in series:
             patch = mergeq.lookup(patch)
             if not patch:
                 self.ui.warn("patch %s does not exist\n" % patch)
                 return (1, None)
 
             info = mergeq.isapplied(patch)
             if not info:
                 self.ui.warn("patch %s is not applied\n" % patch)
                 return (1, None)
             rev = revlog.bin(info[1])
             (err, head) = self.mergeone(repo, mergeq, head, patch, rev, wlock)
             if head:
                 self.applied.append(revlog.hex(head) + ":" + patch)
                 self.applied_dirty = 1
             if err:
                 return (err, head)
         return (0, head)
 
-    def apply(self, repo, series, list=False, update_status=True, 
+    def apply(self, repo, series, list=False, update_status=True,
               strict=False, patchdir=None, merge=None, wlock=None):
         # TODO unify with commands.py
         if not patchdir:
             patchdir = self.path
         pwd = os.getcwd()
         os.chdir(repo.root)
         err = 0
         if not wlock:
             wlock = repo.wlock()
         lock = repo.lock()
         tr = repo.transaction()
         n = None
         for patch in series:
             self.ui.warn("applying %s\n" % patch)
             pf = os.path.join(patchdir, patch)
 
             try:
                 message, comments, user, patchfound = self.readheaders(patch)
             except:
                 self.ui.warn("Unable to read %s\n" % pf)
                 err = 1
                 break
 
             if not message:
                 message = "imported patch %s\n" % patch
             else:
                 if list:
                     message.append("\nimported patch %s" % patch)
                 message = '\n'.join(message)
 
             try:
-                f = os.popen("patch -p1 --no-backup-if-mismatch < '%s'" % 
-                                  (pf))
+                f = os.popen("patch -p1 --no-backup-if-mismatch < '%s'" % (pf))
             except:
                 self.ui.warn("patch failed, unable to continue (try -v)\n")
                 err = 1
                 break
             files = []
             fuzz = False
             for l in f:
                 l = l.rstrip('\r\n');
                 if self.ui.verbose:
                     self.ui.warn(l + "\n")
                 if l[:14] == 'patching file ':
                     pf = os.path.normpath(l[14:])
-                    # when patch finds a space in the file name, it puts 
+                    # when patch finds a space in the file name, it puts
                     # single quotes around the filename.  strip them off
                     if pf[0] == "'" and pf[-1] == "'":
                         pf = pf[1:-1]
                     if pf not in files:
                         files.append(pf)
                     printed_file = False
                     file_str = l
                 elif l.find('with fuzz') >= 0:
                     if not printed_file:
                         self.ui.warn(file_str + '\n')
                         printed_file = True
                     self.ui.warn(l + '\n')
                     fuzz = True
                 elif l.find('saving rejects to file') >= 0:
                     self.ui.warn(l + '\n')
                 elif l.find('FAILED') >= 0:
                     if not printed_file:
                         self.ui.warn(file_str + '\n')
                         printed_file = True
                     self.ui.warn(l + '\n')
             patcherr = f.close()
 
             if merge and len(files) > 0:
-                 # Mark as merged and update dirstate parent info
-                 repo.dirstate.update(repo.dirstate.filterfiles(files), 'm')
-                 p1, p2 = repo.dirstate.parents()
-                 repo.dirstate.setparents(p1, merge)
+                # Mark as merged and update dirstate parent info
+                repo.dirstate.update(repo.dirstate.filterfiles(files), 'm')
+                p1, p2 = repo.dirstate.parents()
+                repo.dirstate.setparents(p1, merge)
             if len(files) > 0:
-                commands.addremove_lock(self.ui, repo, files, 
+                commands.addremove_lock(self.ui, repo, files,
                                         opts={}, wlock=wlock)
             n = repo.commit(files, message, user, force=1, lock=lock,
                             wlock=wlock)
 
             if n == None:
                 self.ui.warn("repo commit failed\n")
                 sys.exit(1)
 
             if update_status:
                 self.applied.append(revlog.hex(n) + ":" + patch)
 
             if patcherr:
                 if not patchfound:
                     self.ui.warn("patch %s is empty\n" % patch)
                     err = 0
                 else:
                     self.ui.warn("patch failed, rejects left in working dir\n")
                     err = 1
                 break
 
             if fuzz and strict:
                 self.ui.warn("fuzz found when applying patch, stopping\n")
                 err = 1
                 break
         tr.close()
         os.chdir(pwd)
         return (err, n)
 
     def delete(self, repo, patch):
         patch = self.lookup(patch)
         info = self.isapplied(patch)
         if info:
             self.ui.warn("cannot delete applied patch %s\n" % patch)
             sys.exit(1)
         if patch not in self.series:
             self.ui.warn("patch %s not in series file\n" % patch)
             sys.exit(1)
         i = self.find_series(patch)
         del self.full_series[i]
         self.read_series(self.full_series)
         self.series_dirty = 1
-    
+
     def check_toppatch(self, repo):
         if len(self.applied) > 0:
             (top, patch) = self.applied[-1].split(':')
             top = revlog.bin(top)
             pp = repo.dirstate.parents()
             if top not in pp:
                 self.ui.warn("queue top not at dirstate parents. top %s dirstate %s %s\n" %( revlog.short(top), revlog.short(pp[0]), revlog.short(pp[1])))
                 sys.exit(1)
             return top
         return None
     def check_localchanges(self, repo):
         (c, a, r, d, u) = repo.changes(None, None)
         if c or a or d or r:
             self.ui.write("Local changes found, refresh first\n")
             sys.exit(1)
     def new(self, repo, patch, msg=None, force=None):
         if not force:
             self.check_localchanges(repo)
         self.check_toppatch(repo)
         wlock = repo.wlock()
         insert = self.series_end()
         if msg:
-           n = repo.commit([], "[mq]: %s" % msg, force=True, wlock=wlock)
+            n = repo.commit([], "[mq]: %s" % msg, force=True, wlock=wlock)
         else:
-           n = repo.commit([], "New patch: %s" % patch, force=True, wlock=wlock)
+            n = repo.commit([],
+                            "New patch: %s" % patch, force=True, wlock=wlock)
         if n == None:
             self.ui.warn("repo commit failed\n")
             sys.exit(1)
         self.full_series[insert:insert] = [patch]
         self.applied.append(revlog.hex(n) + ":" + patch)
         self.read_series(self.full_series)
         self.series_dirty = 1
         self.applied_dirty = 1
         p = self.opener(os.path.join(self.path, patch), "w")
         if msg:
             msg = msg + "\n"
             p.write(msg)
         p.close()
         wlock = None
         r = self.qrepo()
         if r: r.add([patch])
 
     def strip(self, repo, rev, update=True, backup="all", wlock=None):
         def limitheads(chlog, stop):
             """return the list of all nodes that have no children"""
             p = {}
             h = []
             stoprev = 0
             if stop in chlog.nodemap:
                 stoprev = chlog.rev(stop)
 
             for r in range(chlog.count() - 1, -1, -1):
                 n = chlog.node(r)
                 if n not in p:
                     h.append(n)
                 if n == stop:
                     break
                 if r < stoprev:
                     break
                 for pn in chlog.parents(n):
                     p[pn] = 1
             return h
 
         def bundle(cg):
             backupdir = repo.join("strip-backup")
             if not os.path.isdir(backupdir):
                 os.mkdir(backupdir)
             name = os.path.join(backupdir, "%s" % revlog.short(rev))
             name = savename(name)
             self.ui.warn("saving bundle to %s\n" % name)
             # TODO, exclusive open
             f = open(name, "wb")
             try:
                 f.write("HG10")
                 z = bz2.BZ2Compressor(9)
                 while 1:
                     chunk = cg.read(4096)
                     if not chunk:
                         break
                     f.write(z.compress(chunk))
                 f.write(z.flush())
             except:
                 os.unlink(name)
                 raise
             f.close()
             return name
 
         def stripall(rev, revnum):
             cl = repo.changelog
             c = cl.read(rev)
             mm = repo.manifest.read(c[0])
             seen = {}
 
             for x in xrange(revnum, cl.count()):
                 c = cl.read(cl.node(x))
                 for f in c[3]:
                     if f in seen:
                         continue
                     seen[f] = 1
                     if f in mm:
                         filerev = mm[f]
                     else:
                         filerev = 0
                     seen[f] = filerev
             # we go in two steps here so the strip loop happens in a
             # sensible order.  When stripping many files, this helps keep
             # our disk access patterns under control.
             list = seen.keys()
             list.sort()
             for f in list:
                 ff = repo.file(f)
                 filerev = seen[f]
                 if filerev != 0:
                     if filerev in ff.nodemap:
                         filerev = ff.rev(filerev)
                     else:
                         filerev = 0
                 ff.strip(filerev, revnum)
 
         if not wlock:
             wlock = repo.wlock()
         lock = repo.lock()
         chlog = repo.changelog
         # TODO delete the undo files, and handle undo of merge sets
         pp = chlog.parents(rev)
         revnum = chlog.rev(rev)
 
         if update:
             urev = self.qparents(repo, rev)
             repo.update(urev, allow=False, force=True, wlock=wlock)
             repo.dirstate.write()
 
         # save is a list of all the branches we are truncating away
         # that we actually want to keep.  changegroup will be used
         # to preserve them and add them back after the truncate
         saveheads = []
         savebases = {}
 
         tip = chlog.tip()
         heads = limitheads(chlog, rev)
         seen = {}
 
         # search through all the heads, finding those where the revision
         # we want to strip away is an ancestor.  Also look for merges
         # that might be turned into new heads by the strip.
         while heads:
             h = heads.pop()
             n = h
             while True:
                 seen[n] = 1
                 pp = chlog.parents(n)
                 if pp[1] != revlog.nullid and chlog.rev(pp[1]) > revnum:
                     if pp[1] not in seen:
                         heads.append(pp[1])
                 if pp[0] == revlog.nullid:
                     break
                 if chlog.rev(pp[0]) < revnum:
                     break
                 n = pp[0]
                 if n == rev:
                     break
             r = chlog.reachable(h, rev)
             if rev not in r:
                 saveheads.append(h)
                 for x in r:
                     if chlog.rev(x) > revnum:
                         savebases[x] = 1
-                
+
         # create a changegroup for all the branches we need to keep
         if backup is "all":
             backupch = repo.changegroupsubset([rev], chlog.heads(), 'strip')
             bundle(backupch)
         if saveheads:
             backupch = repo.changegroupsubset(savebases.keys(), saveheads, 'strip')
             chgrpfile = bundle(backupch)
 
         stripall(rev, revnum)
 
         change = chlog.read(rev)
         repo.manifest.strip(repo.manifest.rev(change[0]), revnum)
         chlog.strip(revnum, revnum)
         if saveheads:
             self.ui.status("adding branch\n")
             commands.unbundle(self.ui, repo, chgrpfile, update=False)
             if backup is not "strip":
                 os.unlink(chgrpfile)
-             
+
     def isapplied(self, patch):
         """returns (index, rev, patch)"""
         for i in xrange(len(self.applied)):
             p = self.applied[i]
             a = p.split(':')
             if a[1] == patch:
                 return (i, a[0], a[1])
         return None
 
     def lookup(self, patch):
         if patch == None:
             return None
         if patch in self.series:
             return patch
         if not os.path.isfile(os.path.join(self.path, patch)):
             try:
                 sno = int(patch)
             except(ValueError, OverflowError):
                 self.ui.warn("patch %s not in series\n" % patch)
                 sys.exit(1)
             if sno >= len(self.series):
                 self.ui.warn("patch number %d is out of range\n" % sno)
                 sys.exit(1)
             patch = self.series[sno]
         else:
             self.ui.warn("patch %s not in series\n" % patch)
             sys.exit(1)
         return patch
 
-    def push(self, repo, patch=None, force=False, list=False, 
+    def push(self, repo, patch=None, force=False, list=False,
              mergeq=None, wlock=None):
         if not wlock:
             wlock = repo.wlock()
-        patch = self.lookup(patch) 
+        patch = self.lookup(patch)
         if patch and self.isapplied(patch):
             self.ui.warn("patch %s is already applied\n" % patch)
             sys.exit(1)
         if self.series_end() == len(self.series):
             self.ui.warn("File series fully applied\n")
             sys.exit(1)
         if not force:
             self.check_localchanges(repo)
-            
+
         self.applied_dirty = 1;
         start = self.series_end()
         if start > 0:
             self.check_toppatch(repo)
         if not patch:
             patch = self.series[start]
             end = start + 1
         else:
             end = self.series.index(patch, start) + 1
         s = self.series[start:end]
         if mergeq:
             ret = self.mergepatch(repo, mergeq, s, wlock)
         else:
             ret = self.apply(repo, s, list, wlock=wlock)
         top = self.applied[-1].split(':')[1]
         if ret[0]:
-            self.ui.write("Errors during apply, please fix and refresh %s\n" % 
+            self.ui.write("Errors during apply, please fix and refresh %s\n" %
                           top)
         else:
             self.ui.write("Now at: %s\n" % top)
         return ret[0]
 
     def pop(self, repo, patch=None, force=False, update=True, wlock=None):
         def getfile(f, rev):
             t = repo.file(f).read(rev)
             try:
                 repo.wfile(f, "w").write(t)
             except IOError:
                 os.makedirs(os.path.dirname(repo.wjoin(f)))
                 repo.wfile(f, "w").write(t)
 
         if not wlock:
             wlock = repo.wlock()
         if patch:
             # index, rev, patch
             info = self.isapplied(patch)
             if not info:
                 patch = self.lookup(patch)
             info = self.isapplied(patch)
             if not info:
                 self.ui.warn("patch %s is not applied\n" % patch)
                 sys.exit(1)
         if len(self.applied) == 0:
             self.ui.warn("No patches applied\n")
             sys.exit(1)
 
         if not update:
             parents = repo.dirstate.parents()
             rr = [ revlog.bin(x.split(':')[0]) for x in self.applied ]
             for p in parents:
                 if p in rr:
                     self.ui.warn("qpop: forcing dirstate update\n")
                     update = True
 
         if not force and update:
             self.check_localchanges(repo)
 
         self.applied_dirty = 1;
         end = len(self.applied)
         if not patch:
             info = [len(self.applied) - 1] + self.applied[-1].split(':')
         start = info[0]
         rev = revlog.bin(info[1])
 
         # we know there are no local changes, so we can make a simplified
         # form of hg.update.
         if update:
             top = self.check_toppatch(repo)
             qp = self.qparents(repo, rev)
             changes = repo.changelog.read(qp)
             mf1 = repo.manifest.readflags(changes[0])
             mmap = repo.manifest.read(changes[0])
             (c, a, r, d, u) = repo.changes(qp, top)
             if d:
                 raise util.Abort("deletions found between repo revs")
             for f in c:
                 getfile(f, mmap[f])
             for f in r:
                 getfile(f, mmap[f])
                 util.set_exec(repo.wjoin(f), mf1[f])
             repo.dirstate.update(c + r, 'n')
             for f in a:
                 try: os.unlink(repo.wjoin(f))
                 except: raise
                 try: os.removedirs(os.path.dirname(repo.wjoin(f)))
                 except: pass
             if a:
                 repo.dirstate.forget(a)
             repo.dirstate.setparents(qp, revlog.nullid)
         self.strip(repo, rev, update=False, backup='strip', wlock=wlock)
         del self.applied[start:end]
         if len(self.applied):
             self.ui.write("Now at: %s\n" % self.applied[-1].split(':')[1])
         else:
             self.ui.write("Patch queue now empty\n")
 
     def diff(self, repo, files):
         top = self.check_toppatch(repo)
         if not top:
             self.ui.write("No patches applied\n")
             return
         qp = self.qparents(repo, top)
         commands.dodiff(sys.stdout, self.ui, repo, qp, None, files)
 
     def refresh(self, repo, short=False):
         if len(self.applied) == 0:
             self.ui.write("No patches applied\n")
             return
         wlock = repo.wlock()
         self.check_toppatch(repo)
         qp = self.qparents(repo)
         (top, patch) = self.applied[-1].split(':')
         top = revlog.bin(top)
         cparents = repo.changelog.parents(top)
         patchparent = self.qparents(repo, top)
         message, comments, user, patchfound = self.readheaders(patch)
 
         patchf = self.opener(os.path.join(self.path, patch), "w")
         if comments:
             comments = "\n".join(comments) + '\n\n'
             patchf.write(comments)
 
         tip = repo.changelog.tip()
         if top == tip:
-            # if the top of our patch queue is also the tip, there is an 
+            # if the top of our patch queue is also the tip, there is an
             # optimization here.  We update the dirstate in place and strip
             # off the tip commit.  Then just commit the current directory
             # tree.  We can also send repo.commit the list of files
             # changed to speed up the diff
             #
-            # in short mode, we only diff the files included in the 
+            # in short mode, we only diff the files included in the
             # patch already
             #
             # this should really read:
             #(cc, dd, aa, aa2, uu) = repo.changes(tip, patchparent)
             # but we do it backwards to take advantage of manifest/chlog
             # caching against the next repo.changes call
-            # 
+            #
             (cc, aa, dd, aa2, uu) = repo.changes(patchparent, tip)
             if short:
                 filelist = cc + aa + dd
             else:
                 filelist = None
             (c, a, r, d, u) = repo.changes(None, None, filelist)
 
             # we might end up with files that were added between tip and
             # the dirstate parent, but then changed in the local dirstate.
             # in this case, we want them to only show up in the added section
             for x in c:
                 if x not in aa:
                     cc.append(x)
             # we might end up with files added by the local dirstate that
             # were deleted by the patch.  In this case, they should only
             # show up in the changed section.
             for x in a:
                 if x in dd:
                     del dd[dd.index(x)]
                     cc.append(x)
                 else:
                     aa.append(x)
             # make sure any files deleted in the local dirstate
             # are not in the add or change column of the patch
             forget = []
             for x in d + r:
                 if x in aa:
                     del aa[aa.index(x)]
                     forget.append(x)
                     continue
                 elif x in cc:
                     del cc[cc.index(x)]
                 dd.append(x)
 
             c = list(util.unique(cc))
             r = list(util.unique(dd))
             a = list(util.unique(aa))
             filelist = list(util.unique(c + r + a ))
-            commands.dodiff(patchf, self.ui, repo, patchparent, None, 
+            commands.dodiff(patchf, self.ui, repo, patchparent, None,
                             filelist, changes=(c, a, r, [], u))
             patchf.close()
 
             changes = repo.changelog.read(tip)
             repo.dirstate.setparents(*cparents)
             repo.dirstate.update(a, 'a')
             repo.dirstate.update(r, 'r')
-            repo.dirstate.update(c, 'n')   
+            repo.dirstate.update(c, 'n')
             repo.dirstate.forget(forget)
 
             if not message:
                 message = "patch queue: %s\n" % patch
             else:
                 message = "\n".join(message)
             self.strip(repo, top, update=False, backup='strip', wlock=wlock)
             n = repo.commit(filelist, message, changes[1], force=1, wlock=wlock)
             self.applied[-1] = revlog.hex(n) + ':' + patch
             self.applied_dirty = 1
         else:
             commands.dodiff(patchf, self.ui, repo, patchparent, None)
             patchf.close()
             self.pop(repo, force=True, wlock=wlock)
             self.push(repo, force=True, wlock=wlock)
 
     def init(self, repo, create=False):
         if os.path.isdir(self.path):
             raise util.Abort("patch queue directory already exists")
         os.mkdir(self.path)
         if create:
             return self.qrepo(create=True)
 
     def unapplied(self, repo, patch=None):
         if patch and patch not in self.series:
             self.ui.warn("%s not in the series file\n" % patch)
             sys.exit(1)
         if not patch:
             start = self.series_end()
         else:
             start = self.series.index(patch) + 1
         for p in self.series[start:]:
             self.ui.write("%s\n" % p)
-        
+
     def qseries(self, repo, missing=None):
         start = self.series_end()
         if not missing:
             for p in self.series[:start]:
                 if self.ui.verbose:
                     self.ui.write("%d A " % self.series.index(p))
                 self.ui.write("%s\n" % p)
             for p in self.series[start:]:
                 if self.ui.verbose:
                     self.ui.write("%d U " % self.series.index(p))
                 self.ui.write("%s\n" %  p)
         else:
             list = []
             for root, dirs, files in os.walk(self.path):
                 d = root[len(self.path) + 1:]
                 for f in files:
                     fl = os.path.join(d, f)
                     if (fl not in self.series and fl != "status" and
-                       fl != "series" and not fl.startswith('.')):
+                        fl != "series" and not fl.startswith('.')):
                         list.append(fl)
             list.sort()
             if list:
-                for x in list: 
+                for x in list:
                     if self.ui.verbose:
                         self.ui.write("D ")
                     self.ui.write("%s\n" % x)
 
     def issaveline(self, l):
         name = l.split(':')[1]
         if name == '.hg.patches.save.line':
             return True
 
     def qrepo(self, create=False):
         if create or os.path.isdir(os.path.join(self.path, ".hg")):
             return hg.repository(ui=self.ui, path=self.path, create=create)
 
     def restore(self, repo, rev, delete=None, qupdate=None):
         c = repo.changelog.read(rev)
         desc = c[4].strip()
         lines = desc.splitlines()
         i = 0
         datastart = None
         series = []
         applied = []
         qpp = None
         for i in xrange(0, len(lines)):
             if lines[i] == 'Patch Data:':
                 datastart = i + 1
             elif lines[i].startswith('Dirstate:'):
                 l = lines[i].rstrip()
                 l = l[10:].split(' ')
                 qpp = [ hg.bin(x) for x in l ]
             elif datastart != None:
                 l = lines[i].rstrip()
                 index = l.index(':')
                 id = l[:index]
                 file = l[index + 1:]
                 if id:
                     applied.append(l)
                 series.append(file)
         if datastart == None:
             self.ui.warn("No saved patch data found\n")
             return 1
         self.ui.warn("restoring status: %s\n" % lines[0])
         self.full_series = series
         self.applied = applied
         self.read_series(self.full_series)
         self.series_dirty = 1
         self.applied_dirty = 1
         heads = repo.changelog.heads()
         if delete:
             if rev not in heads:
                 self.ui.warn("save entry has children, leaving it alone\n")
             else:
                 self.ui.warn("removing save entry %s\n" % hg.short(rev))
                 pp = repo.dirstate.parents()
                 if rev in pp:
                     update = True
                 else:
                     update = False
                 self.strip(repo, rev, update=update, backup='strip')
         if qpp:
-            self.ui.warn("saved queue repository parents: %s %s\n" % 
+            self.ui.warn("saved queue repository parents: %s %s\n" %
                          (hg.short(qpp[0]), hg.short(qpp[1])))
             if qupdate:
                 print "queue directory updating"
                 r = self.qrepo()
                 if not r:
                     self.ui.warn("Unable to load queue repository\n")
                     return 1
                 r.update(qpp[0], allow=False, force=True)
 
     def save(self, repo, msg=None):
         if len(self.applied) == 0:
             self.ui.warn("save: no patches applied, exiting\n")
             return 1
         if self.issaveline(self.applied[-1]):
             self.ui.warn("status is already saved\n")
             return 1
-        
+
         ar = [ ':' + x for x in self.full_series ]
         if not msg:
             msg = "hg patches saved state"
         else:
             msg = "hg patches: " + msg.rstrip('\r\n')
         r = self.qrepo()
         if r:
             pp = r.dirstate.parents()
             msg += "\nDirstate: %s %s" % (hg.hex(pp[0]), hg.hex(pp[1]))
         msg += "\n\nPatch Data:\n"
-        text = msg + "\n".join(self.applied) + '\n' + (ar and "\n".join(ar) 
-                                                    + '\n' or "")
+        text = msg + "\n".join(self.applied) + '\n' + (ar and "\n".join(ar)
+                                                       + '\n' or "")
         n = repo.commit(None, text, user=None, force=1)
         if not n:
             self.ui.warn("repo commit failed\n")
             return 1
         self.applied.append(revlog.hex(n) + ":" + '.hg.patches.save.line')
         self.applied_dirty = 1
 
     def series_end(self):
         end = 0
         if len(self.applied) > 0:
             (top, p) = self.applied[-1].split(':')
             try:
                 end = self.series.index(p)
             except ValueError:
                 return 0
             return end + 1
         return end
 
     def qapplied(self, repo, patch=None):
         if patch and patch not in self.series:
             self.ui.warn("%s not in the series file\n" % patch)
             sys.exit(1)
         if not patch:
             end = len(self.applied)
         else:
             end = self.series.index(patch) + 1
         for x in xrange(end):
             p = self.appliedname(x)
             self.ui.write("%s\n" % p)
 
     def appliedname(self, index):
         p = self.applied[index]
         if not self.ui.verbose:
             p = p.split(':')[1]
         return p
-        
+
     def top(self, repo):
         if len(self.applied):
             p = self.appliedname(-1)
             self.ui.write(p + '\n')
         else:
             self.ui.write("No patches applied\n")
 
     def next(self, repo):
         end = self.series_end()
         if end == len(self.series):
             self.ui.write("All patches applied\n")
         else:
             self.ui.write(self.series[end] + '\n')
 
     def prev(self, repo):
         if len(self.applied) > 1:
             p = self.appliedname(-2)
             self.ui.write(p + '\n')
         elif len(self.applied) == 1:
             self.ui.write("Only one patch applied\n")
         else:
             self.ui.write("No patches applied\n")
 
     def qimport(self, repo, files, patch=None, existing=None, force=None):
         if len(files) > 1 and patch:
             self.ui.warn("-n option not valid when importing multiple files\n")
             sys.exit(1)
         i = 0
         for filename in files:
             if existing:
-                if not patch: 
+                if not patch:
                     patch = filename
                 if not os.path.isfile(os.path.join(self.path, patch)):
                     self.ui.warn("patch %s does not exist\n" % patch)
                     sys.exit(1)
             else:
                 try:
                     text = file(filename).read()
                 except IOError:
                     self.ui.warn("Unable to read %s\n" % patch)
                     sys.exit(1)
                 if not patch:
                     patch = os.path.split(filename)[1]
                 if not force and os.path.isfile(os.path.join(self.path, patch)):
                     self.ui.warn("patch %s already exists\n" % patch)
                     sys.exit(1)
                 patchf = self.opener(os.path.join(self.path, patch), "w")
                 patchf.write(text)
             if patch in self.series:
                 self.ui.warn("patch %s is already in the series file\n" % patch)
                 sys.exit(1)
             index = self.series_end() + i
             self.full_series[index:index] = [patch]
             self.read_series(self.full_series)
             self.ui.warn("adding %s to series file\n" % patch)
             i += 1
             patch = None
         self.series_dirty = 1
 
 def delete(ui, repo, patch, **opts):
     """remove a patch from the series file"""
     q = repomap[repo]
     q.delete(repo, patch)
     q.save_dirty()
     return 0
 
 def applied(ui, repo, patch=None, **opts):
     """print the patches already applied"""
     repomap[repo].qapplied(repo, patch)
     return 0
 
 def unapplied(ui, repo, patch=None, **opts):
     """print the patches not yet applied"""
     repomap[repo].unapplied(repo, patch)
     return 0
 
 def qimport(ui, repo, *filename, **opts):
     """import a patch"""
     q = repomap[repo]
-    q.qimport(repo, filename, patch=opts['name'], 
-                          existing=opts['existing'], force=opts['force'])
+    q.qimport(repo, filename, patch=opts['name'],
+              existing=opts['existing'], force=opts['force'])
     q.save_dirty()
     return 0
 
 def init(ui, repo, **opts):
     """init a new queue repository"""
     q = repomap[repo]
     r = q.init(repo, create=opts['create_repo'])
     q.save_dirty()
     if r:
         fp = r.wopener('.hgignore', 'w')
         print >> fp, 'syntax: glob'
         print >> fp, 'status'
         fp.close()
         r.wopener('series', 'w').close()
         r.add(['.hgignore', 'series'])
     return 0
 
 def commit(ui, repo, *pats, **opts):
     q = repomap[repo]
     r = q.qrepo()
     if not r: raise util.Abort('no queue repository')
     commands.commit(r.ui, r, *pats, **opts)
 
 def series(ui, repo, **opts):
     """print the entire series file"""
     repomap[repo].qseries(repo, missing=opts['missing'])
     return 0
 
 def top(ui, repo, **opts):
     """print the name of the current patch"""
     repomap[repo].top(repo)
     return 0
 
 def next(ui, repo, **opts):
     """print the name of the next patch"""
     repomap[repo].next(repo)
     return 0
 
 def prev(ui, repo, **opts):
     """print the name of the previous patch"""
     repomap[repo].prev(repo)
     return 0
 
 def new(ui, repo, patch, **opts):
     """create a new patch"""
     q = repomap[repo]
     q.new(repo, patch, msg=opts['message'], force=opts['force'])
     q.save_dirty()
     return 0
 
 def refresh(ui, repo, **opts):
     """update the current patch"""
     q = repomap[repo]
     q.refresh(repo, short=opts['short'])
     q.save_dirty()
     return 0
 
 def diff(ui, repo, *files, **opts):
     """diff of the current patch"""
     repomap[repo].diff(repo, files)
     return 0
 
 def lastsavename(path):
     (dir, base) = os.path.split(path)
     names = os.listdir(dir)
     namere = re.compile("%s.([0-9]+)" % base)
     max = None
     maxname = None
     for f in names:
         m = namere.match(f)
         if m:
             index = int(m.group(1))
             if max == None or index > max:
                 max = index
                 maxname = f
     if maxname:
         return (os.path.join(dir, maxname), max)
     return (None, None)
-    
+
 def savename(path):
     (last, index) = lastsavename(path)
     if last is None:
         index = 0
     newpath = path + ".%d" % (index + 1)
     return newpath
 
 def push(ui, repo, patch=None, **opts):
     """push the next patch onto the stack"""
     q = repomap[repo]
     mergeq = None
-        
+
     if opts['all']:
         patch = q.series[-1]
     if opts['merge']:
         if opts['name']:
             newpath = opts['name']
         else:
-            newpath,i = lastsavename(q.path)
+            newpath, i = lastsavename(q.path)
         if not newpath:
             ui.warn("no saved queues found, please use -n\n")
             return 1
         mergeq = queue(ui, repo.join(""), newpath)
         ui.warn("merging with queue at: %s\n" % mergeq.path)
-    ret = q.push(repo, patch, force=opts['force'], list=opts['list'], 
+    ret = q.push(repo, patch, force=opts['force'], list=opts['list'],
                  mergeq=mergeq)
     q.save_dirty()
     return ret
 
 def pop(ui, repo, patch=None, **opts):
     """pop the current patch off the stack"""
     localupdate = True
     if opts['name']:
         q = queue(ui, repo.join(""), repo.join(opts['name']))
         ui.warn('using patch queue: %s\n' % q.path)
         localupdate = False
     else:
         q = repomap[repo]
     if opts['all'] and len(q.applied) > 0:
         patch = q.applied[0].split(':')[1]
     q.pop(repo, patch, force=opts['force'], update=localupdate)
     q.save_dirty()
     return 0
 
 def restore(ui, repo, rev, **opts):
     """restore the queue state saved by a rev"""
     rev = repo.lookup(rev)
     q = repomap[repo]
     q.restore(repo, rev, delete=opts['delete'],
-                          qupdate=opts['update'])
+              qupdate=opts['update'])
     q.save_dirty()
     return 0
 
 def save(ui, repo, **opts):
     """save current queue state"""
     q = repomap[repo]
     ret = q.save(repo, msg=opts['message'])
     if ret:
         return ret
     q.save_dirty()
     if opts['copy']:
         path = q.path
         if opts['name']:
             newpath = os.path.join(q.basepath, opts['name'])
             if os.path.exists(newpath):
                 if not os.path.isdir(newpath):
                     ui.warn("destination %s exists and is not a directory\n" %
-                             newpath)
+                            newpath)
                     sys.exit(1)
                 if not opts['force']:
                     ui.warn("destination %s exists, use -f to force\n" %
-                             newpath)
+                            newpath)
                     sys.exit(1)
         else:
             newpath = savename(path)
         ui.warn("copy %s to %s\n" % (path, newpath))
         util.copyfiles(path, newpath)
     if opts['empty']:
         try:
             os.unlink(q.status_path)
         except:
             pass
     return 0
-    
+
 def strip(ui, repo, rev, **opts):
     """strip a revision and all later revs on the same branch"""
     rev = repo.lookup(rev)
     backup = 'all'
     if opts['backup']:
         backup = 'strip'
     elif opts['nobackup']:
         backup = 'none'
     repomap[repo].strip(repo, rev, backup=backup)
     return 0
 
 def version(ui, q=None):
     """print the version number"""
     ui.write("mq version %s\n" % versionstr)
     return 0
 
 def reposetup(ui, repo):
     repomap[repo] = queue(ui, repo.join(""))
 
 cmdtable = {
-    "qapplied": (applied, [], "hg qapplied [patch]"),
-    "qcommit|qci": (commit,
-                    [('A', 'addremove', None, _('run addremove during commit')),
-                     ('I', 'include', [], _('include names matching the given patterns')),
-                     ('X', 'exclude', [], _('exclude names matching the given patterns')),
-                     ('m', 'message', "", _('use <text> as commit message')),
-                     ('l', 'logfile', "", _('read the commit message from <file>')),
-                     ('d', 'date', "", _('record datecode as commit date')),
-                     ('u', 'user', "", _('record user as commiter'))],
-                    "hg qcommit [options] [files]"),
-    "^qdiff": (diff, [], "hg qdiff [files]"),
-    "qdelete": (delete, [], "hg qdelete [patch]"),
-    "^qimport": (qimport, [('e', 'existing', None, 'import file in patch dir'),
-                           ('n', 'name', "", 'patch file name'),
-                           ('f', 'force', None, 'overwrite existing files')],
-                 "hg qimport"),
-    "^qinit": (init, [('c', 'create-repo', None, 'create patch repository')],
-               "hg [-c] qinit"),
-    "qnew": (new, [('m', 'message', "", 'commit message'),
-                   ('f', 'force', None, 'force')], 
-                   "hg qnew [-m message ] patch"),
-    "qnext": (next, [], "hg qnext"),
-    "qprev": (prev, [], "hg qprev"),
-    "^qpop": (pop, [('a', 'all', None, 'pop all patches'),
-                     ('n', 'name', "", 'queue name to pop'),
-                   ('f', 'force', None, 'forget any local changes')], 
-            'hg qpop [options] [patch/index]'),
-    "^qpush": (push, [('f', 'force', None, 'apply if the patch has rejects'),
-                     ('l', 'list', None, 'list patch name in commit text'),
-                     ('a', 'all', None, 'apply all patches'),
-                     ('m', 'merge', None, 'merge from another queue'),
-                     ('n', 'name', "", 'merge queue name')],
-             'hg qpush [options] [patch/index]'),
-    "^qrefresh": (refresh, [('s', 'short', None, 'short refresh')],"hg qrefresh"),
-    "qrestore": (restore, [('d', 'delete', None, 'delete save entry'),
-                           ('u', 'update', None, 'update queue working dir')], 
-                 'hg qrestore rev'),
-    "qsave": (save, [('m', 'message', "", 'commit message'),
-                     ('c', 'copy', None, 'copy patch directory'),
-                     ('n', 'name', "", 'copy directory name'),
-                     ('e', 'empty', None, 'clear queue status file'),
-                     ('f', 'force', None, 'force copy')], 'hg qsave'),
-    "qseries": (series, [('m', 'missing', None, 'print patches not in series')],
-                "hg qseries"),
-    "^strip": (strip, [('f', 'force', None, 'force multi-head removal'),
-                       ('b', 'backup', None, 'bundle unrelated changesets'),
-                       ('n', 'nobackup', None, 'no backups')], "hg strip rev"),
-    "qtop": (top, [], "hg qtop"),
-    "qunapplied": (unapplied, [], "hg qunapplied [patch]"),
-    "qversion": (version, [], "hg qversion")
+    "qapplied": (applied, [], 'hg qapplied [patch]'),
+    "qcommit|qci":
+        (commit,
+         [('A', 'addremove', None, _('run addremove during commit')),
+          ('I', 'include', [], _('include names matching the given patterns')),
+          ('X', 'exclude', [], _('exclude names matching the given patterns')),
+          ('m', 'message', '', _('use <text> as commit message')),
+          ('l', 'logfile', '', _('read the commit message from <file>')),
+          ('d', 'date', '', _('record datecode as commit date')),
+          ('u', 'user', '', _('record user as commiter'))],
+         'hg qcommit [options] [files]'),
+    "^qdiff": (diff, [], 'hg qdiff [files]'),
+    "qdelete": (delete, [], 'hg qdelete [patch]'),
+    "^qimport":
+        (qimport,
+         [('e', 'existing', None, 'import file in patch dir'),
+          ('n', 'name', '', 'patch file name'),
+          ('f', 'force', None, 'overwrite existing files')],
+         'hg qimport'),
+    "^qinit":
+        (init,
+         [('c', 'create-repo', None, 'create patch repository')],
+         'hg [-c] qinit'),
+    "qnew":
+        (new,
+         [('m', 'message', '', 'commit message'),
+          ('f', 'force', None, 'force')],
+         'hg qnew [-m message ] patch'),
+    "qnext": (next, [], 'hg qnext'),
+    "qprev": (prev, [], 'hg qprev'),
+    "^qpop":
+        (pop,
+         [('a', 'all', None, 'pop all patches'),
+          ('n', 'name', '', 'queue name to pop'),
+          ('f', 'force', None, 'forget any local changes')],
+         'hg qpop [options] [patch/index]'),
+    "^qpush":
+        (push,
+         [('f', 'force', None, 'apply if the patch has rejects'),
+          ('l', 'list', None, 'list patch name in commit text'),
+          ('a', 'all', None, 'apply all patches'),
+          ('m', 'merge', None, 'merge from another queue'),
+          ('n', 'name', '', 'merge queue name')],
+         'hg qpush [options] [patch/index]'),
+    "^qrefresh":
+        (refresh,
+         [('s', 'short', None, 'short refresh')],
+         'hg qrefresh'),
+    "qrestore":
+        (restore,
+         [('d', 'delete', None, 'delete save entry'),
+          ('u', 'update', None, 'update queue working dir')],
+         'hg qrestore rev'),
+    "qsave":
+        (save,
+         [('m', 'message', '', 'commit message'),
+          ('c', 'copy', None, 'copy patch directory'),
+          ('n', 'name', '', 'copy directory name'),
+          ('e', 'empty', None, 'clear queue status file'),
+          ('f', 'force', None, 'force copy')],
+         'hg qsave'),
+    "qseries":
+        (series,
+         [('m', 'missing', None, 'print patches not in series')],
+         'hg qseries'),
+    "^strip":
+        (strip,
+         [('f', 'force', None, 'force multi-head removal'),
+          ('b', 'backup', None, 'bundle unrelated changesets'),
+          ('n', 'nobackup', None, 'no backups')],
+         'hg strip rev'),
+    "qtop": (top, [], 'hg qtop'),
+    "qunapplied": (unapplied, [], 'hg qunapplied [patch]'),
+    "qversion": (version, [], 'hg qversion')
 }
 

mercurial/util.py

@@ -1,692 +1,692 b''
 """
 util.py - Mercurial utility functions and platform specfic implementations
 
  Copyright 2005 K. Thananchayan <[e-mail]>
 
 This software may be used and distributed according to the terms
 of the GNU General Public License, incorporated herein by reference.
 
 This contains helper routines that are independent of the SCM core and hide
 platform-specific details from the core.
 """
 
 import os, errno
 from i18n import gettext as _
 from demandload import *
 demandload(globals(), "cStringIO errno popen2 re shutil sys tempfile")
 demandload(globals(), "threading time")
 
 def pipefilter(s, cmd):
     '''filter string S through command CMD, returning its output'''
     (pout, pin) = popen2.popen2(cmd, -1, 'b')
     def writer():
         pin.write(s)
         pin.close()
 
     # we should use select instead on UNIX, but this will work on most
     # systems, including Windows
     w = threading.Thread(target=writer)
     w.start()
     f = pout.read()
     pout.close()
     w.join()
     return f
 
 def tempfilter(s, cmd):
     '''filter string S through a pair of temporary files with CMD.
     CMD is used as a template to create the real command to be run,
     with the strings INFILE and OUTFILE replaced by the real names of
     the temporary files generated.'''
     inname, outname = None, None
     try:
         infd, inname = tempfile.mkstemp(prefix='hgfin')
         fp = os.fdopen(infd, 'wb')
         fp.write(s)
         fp.close()
         outfd, outname = tempfile.mkstemp(prefix='hgfout')
         os.close(outfd)
         cmd = cmd.replace('INFILE', inname)
         cmd = cmd.replace('OUTFILE', outname)
         code = os.system(cmd)
         if code: raise Abort(_("command '%s' failed: %s") %
                              (cmd, explain_exit(code)))
         return open(outname, 'rb').read()
     finally:
         try:
             if inname: os.unlink(inname)
         except: pass
         try:
             if outname: os.unlink(outname)
         except: pass
 
 filtertable = {
     'tempfile:': tempfilter,
     'pipe:': pipefilter,
     }
 
 def filter(s, cmd):
     "filter a string through a command that transforms its input to its output"
     for name, fn in filtertable.iteritems():
         if cmd.startswith(name):
             return fn(s, cmd[len(name):].lstrip())
     return pipefilter(s, cmd)
 
 def patch(strip, patchname, ui):
     """apply the patch <patchname> to the working directory.
     a list of patched files is returned"""
     fp = os.popen('patch -p%d < "%s"' % (strip, patchname))
     files = {}
     for line in fp:
         line = line.rstrip()
         ui.status("%s\n" % line)
         if line.startswith('patching file '):
             pf = parse_patch_output(line)
             files.setdefault(pf, 1)
     code = fp.close()
     if code:
         raise Abort(_("patch command failed: %s") % explain_exit(code)[0])
     return files.keys()
 
 def binary(s):
     """return true if a string is binary data using diff's heuristic"""
     if s and '\0' in s[:4096]:
         return True
     return False
 
 def unique(g):
     """return the uniq elements of iterable g"""
     seen = {}
     for f in g:
         if f not in seen:
             seen[f] = 1
             yield f
 
 class Abort(Exception):
     """Raised if a command needs to print an error and exit."""
 
 def always(fn): return True
 def never(fn): return False
 
 def patkind(name, dflt_pat='glob'):
     """Split a string into an optional pattern kind prefix and the
     actual pattern."""
     for prefix in 're', 'glob', 'path', 'relglob', 'relpath', 'relre':
         if name.startswith(prefix + ':'): return name.split(':', 1)
     return dflt_pat, name
 
 def globre(pat, head='^', tail='$'):
     "convert a glob pattern into a regexp"
     i, n = 0, len(pat)
     res = ''
     group = False
     def peek(): return i < n and pat[i]
     while i < n:
         c = pat[i]
         i = i+1
         if c == '*':
             if peek() == '*':
                 i += 1
                 res += '.*'
             else:
                 res += '[^/]*'
         elif c == '?':
             res += '.'
         elif c == '[':
             j = i
             if j < n and pat[j] in '!]':
                 j += 1
             while j < n and pat[j] != ']':
                 j += 1
             if j >= n:
                 res += '\\['
             else:
                 stuff = pat[i:j].replace('\\','\\\\')
                 i = j + 1
                 if stuff[0] == '!':
                     stuff = '^' + stuff[1:]
                 elif stuff[0] == '^':
                     stuff = '\\' + stuff
                 res = '%s[%s]' % (res, stuff)
         elif c == '{':
             group = True
             res += '(?:'
         elif c == '}' and group:
             res += ')'
             group = False
         elif c == ',' and group:
             res += '|'
         else:
             res += re.escape(c)
     return head + res + tail
 
 _globchars = {'[': 1, '{': 1, '*': 1, '?': 1}
 
 def pathto(n1, n2):
     '''return the relative path from one place to another.
     this returns a path in the form used by the local filesystem, not hg.'''
     if not n1: return localpath(n2)
     a, b = n1.split('/'), n2.split('/')
     a.reverse()
     b.reverse()
     while a and b and a[-1] == b[-1]:
         a.pop()
         b.pop()
     b.reverse()
     return os.sep.join((['..'] * len(a)) + b)
 
 def canonpath(root, cwd, myname):
     """return the canonical path of myname, given cwd and root"""
     if root == os.sep:
         rootsep = os.sep
     else:
-    	rootsep = root + os.sep
+        rootsep = root + os.sep
     name = myname
     if not name.startswith(os.sep):
         name = os.path.join(root, cwd, name)
     name = os.path.normpath(name)
     if name.startswith(rootsep):
         return pconvert(name[len(rootsep):])
     elif name == root:
         return ''
     else:
         raise Abort('%s not under root' % myname)
 
 def matcher(canonroot, cwd='', names=['.'], inc=[], exc=[], head='', src=None):
     return _matcher(canonroot, cwd, names, inc, exc, head, 'glob', src)
 
 def cmdmatcher(canonroot, cwd='', names=['.'], inc=[], exc=[], head='', src=None):
     if os.name == 'nt':
         dflt_pat = 'glob'
     else:
         dflt_pat = 'relpath'
     return _matcher(canonroot, cwd, names, inc, exc, head, dflt_pat, src)
 
 def _matcher(canonroot, cwd, names, inc, exc, head, dflt_pat, src):
     """build a function to match a set of file patterns
 
     arguments:
     canonroot - the canonical root of the tree you're matching against
     cwd - the current working directory, if relevant
     names - patterns to find
     inc - patterns to include
     exc - patterns to exclude
     head - a regex to prepend to patterns to control whether a match is rooted
 
     a pattern is one of:
     'glob:<rooted glob>'
     're:<rooted regexp>'
     'path:<rooted path>'
     'relglob:<relative glob>'
     'relpath:<relative path>'
     'relre:<relative regexp>'
     '<rooted path or regexp>'
 
     returns:
     a 3-tuple containing
     - list of explicit non-pattern names passed in
     - a bool match(filename) function
     - a bool indicating if any patterns were passed in
 
     todo:
     make head regex a rooted bool
     """
 
     def contains_glob(name):
         for c in name:
             if c in _globchars: return True
         return False
 
     def regex(kind, name, tail):
         '''convert a pattern into a regular expression'''
         if kind == 're':
             return name
         elif kind == 'path':
             return '^' + re.escape(name) + '(?:/|$)'
         elif kind == 'relglob':
             return head + globre(name, '(?:|.*/)', tail)
         elif kind == 'relpath':
             return head + re.escape(name) + tail
         elif kind == 'relre':
             if name.startswith('^'):
                 return name
             return '.*' + name
         return head + globre(name, '', tail)
 
     def matchfn(pats, tail):
         """build a matching function from a set of patterns"""
         if not pats:
             return
         matches = []
         for k, p in pats:
             try:
                 pat = '(?:%s)' % regex(k, p, tail)
                 matches.append(re.compile(pat).match)
             except re.error:
                 if src: raise Abort("%s: invalid pattern (%s): %s" % (src, k, p))
                 else: raise Abort("invalid pattern (%s): %s" % (k, p))
 
         def buildfn(text):
             for m in matches:
                 r = m(text)
                 if r:
                     return r
 
         return buildfn
 
     def globprefix(pat):
         '''return the non-glob prefix of a path, e.g. foo/* -> foo'''
         root = []
         for p in pat.split(os.sep):
             if contains_glob(p): break
             root.append(p)
         return '/'.join(root)
 
     pats = []
     files = []
     roots = []
     for kind, name in [patkind(p, dflt_pat) for p in names]:
         if kind in ('glob', 'relpath'):
             name = canonpath(canonroot, cwd, name)
             if name == '':
                 kind, name = 'glob', '**'
         if kind in ('glob', 'path', 're'):
             pats.append((kind, name))
         if kind == 'glob':
             root = globprefix(name)
             if root: roots.append(root)
         elif kind == 'relpath':
             files.append((kind, name))
             roots.append(name)
 
     patmatch = matchfn(pats, '$') or always
     filematch = matchfn(files, '(?:/|$)') or always
     incmatch = always
     if inc:
         incmatch = matchfn(map(patkind, inc), '(?:/|$)')
     excmatch = lambda fn: False
     if exc:
         excmatch = matchfn(map(patkind, exc), '(?:/|$)')
 
     return (roots,
             lambda fn: (incmatch(fn) and not excmatch(fn) and
                         (fn.endswith('/') or
                          (not pats and not files) or
                          (pats and patmatch(fn)) or
                          (files and filematch(fn)))),
             (inc or exc or (pats and pats != [('glob', '**')])) and True)
 
 def system(cmd, errprefix=None):
     """execute a shell command that must succeed"""
     rc = os.system(cmd)
     if rc:
         errmsg = "%s %s" % (os.path.basename(cmd.split(None, 1)[0]),
                             explain_exit(rc)[0])
         if errprefix:
             errmsg = "%s: %s" % (errprefix, errmsg)
         raise Abort(errmsg)
 
 def rename(src, dst):
     """forcibly rename a file"""
     try:
         os.rename(src, dst)
     except:
         os.unlink(dst)
         os.rename(src, dst)
 
 def unlink(f):
     """unlink and remove the directory if it is empty"""
     os.unlink(f)
     # try removing directories that might now be empty
     try: os.removedirs(os.path.dirname(f))
     except: pass
 
 def copyfiles(src, dst, hardlink=None):
     """Copy a directory tree using hardlinks if possible"""
 
     if hardlink is None:
         hardlink = (os.stat(src).st_dev ==
                     os.stat(os.path.dirname(dst)).st_dev)
 
     if os.path.isdir(src):
         os.mkdir(dst)
         for name in os.listdir(src):
             srcname = os.path.join(src, name)
             dstname = os.path.join(dst, name)
             copyfiles(srcname, dstname, hardlink)
     else:
         if hardlink:
             try:
                 os_link(src, dst)
             except:
                 hardlink = False
                 shutil.copy(src, dst)
         else:
             shutil.copy(src, dst)
 
 def opener(base):
     """
     return a function that opens files relative to base
 
     this function is used to hide the details of COW semantics and
     remote file access from higher level code.
     """
     p = base
 
     def mktempcopy(name):
         d, fn = os.path.split(name)
         fd, temp = tempfile.mkstemp(prefix=fn, dir=d)
         fp = os.fdopen(fd, "wb")
         try:
             fp.write(file(name, "rb").read())
         except:
             try: os.unlink(temp)
             except: pass
             raise
         fp.close()
         st = os.lstat(name)
         os.chmod(temp, st.st_mode)
         return temp
 
     class atomicfile(file):
         """the file will only be copied on close"""
         def __init__(self, name, mode, atomic=False):
             self.__name = name
             self.temp = mktempcopy(name)
             file.__init__(self, self.temp, mode)
         def close(self):
             if not self.closed:
                 file.close(self)
                 rename(self.temp, self.__name)
         def __del__(self):
             self.close()
 
     def o(path, mode="r", text=False, atomic=False):
         f = os.path.join(p, path)
 
         if not text:
             mode += "b" # for that other OS
 
         if mode[0] != "r":
             try:
                 nlink = nlinks(f)
             except OSError:
                 d = os.path.dirname(f)
                 if not os.path.isdir(d):
                     os.makedirs(d)
             else:
                 if atomic:
                     return atomicfile(f, mode)
                 if nlink > 1:
                     rename(mktempcopy(f), f)
         return file(f, mode)
 
     return o
 
 def _makelock_file(info, pathname):
     ld = os.open(pathname, os.O_CREAT | os.O_WRONLY | os.O_EXCL)
     os.write(ld, info)
     os.close(ld)
 
 def _readlock_file(pathname):
     return file(pathname).read()
 
 def nlinks(pathname):
     """Return number of hardlinks for the given file."""
     return os.stat(pathname).st_nlink
 
 if hasattr(os, 'link'):
     os_link = os.link
 else:
     def os_link(src, dst):
         raise OSError(0, _("Hardlinks not supported"))
 
 # Platform specific variants
 if os.name == 'nt':
     demandload(globals(), "msvcrt")
     nulldev = 'NUL:'
 
     class winstdout:
         '''stdout on windows misbehaves if sent through a pipe'''
 
         def __init__(self, fp):
             self.fp = fp
 
         def __getattr__(self, key):
             return getattr(self.fp, key)
 
         def close(self):
             try:
                 self.fp.close()
             except: pass
 
         def write(self, s):
             try:
                 return self.fp.write(s)
             except IOError, inst:
                 if inst.errno != 0: raise
                 self.close()
                 raise IOError(errno.EPIPE, 'Broken pipe')
 
     sys.stdout = winstdout(sys.stdout)
 
     try:
         import win32api, win32process
         filename = win32process.GetModuleFileNameEx(win32api.GetCurrentProcess(), 0)
         systemrc = os.path.join(os.path.dirname(filename), 'mercurial.ini')
 
     except ImportError:
         systemrc = r'c:\mercurial\mercurial.ini'
         pass
 
     rcpath = (systemrc,
               os.path.join(os.path.expanduser('~'), 'mercurial.ini'))
 
     def parse_patch_output(output_line):
         """parses the output produced by patch and returns the file name"""
         pf = output_line[14:]
         if pf[0] == '`':
             pf = pf[1:-1] # Remove the quotes
         return pf
 
     try: # ActivePython can create hard links using win32file module
         import win32file
 
         def os_link(src, dst): # NB will only succeed on NTFS
             win32file.CreateHardLink(dst, src)
 
         def nlinks(pathname):
             """Return number of hardlinks for the given file."""
             try:
                 fh = win32file.CreateFile(pathname,
                     win32file.GENERIC_READ, win32file.FILE_SHARE_READ,
                     None, win32file.OPEN_EXISTING, 0, None)
                 res = win32file.GetFileInformationByHandle(fh)
                 fh.Close()
                 return res[7]
             except:
                 return os.stat(pathname).st_nlink
 
     except ImportError:
         pass
 
     def is_exec(f, last):
         return last
 
     def set_exec(f, mode):
         pass
 
     def set_binary(fd):
         msvcrt.setmode(fd.fileno(), os.O_BINARY)
 
     def pconvert(path):
         return path.replace("\\", "/")
 
     def localpath(path):
         return path.replace('/', '\\')
 
     def normpath(path):
         return pconvert(os.path.normpath(path))
 
     makelock = _makelock_file
     readlock = _readlock_file
 
     def explain_exit(code):
         return _("exited with status %d") % code, code
 
 else:
     nulldev = '/dev/null'
 
     def rcfiles(path):
         rcs = [os.path.join(path, 'hgrc')]
         rcdir = os.path.join(path, 'hgrc.d')
         try:
             rcs.extend([os.path.join(rcdir, f) for f in os.listdir(rcdir)
                         if f.endswith(".rc")])
         except OSError, inst: pass
         return rcs
     rcpath = []
     if len(sys.argv) > 0:
         rcpath.extend(rcfiles(os.path.dirname(sys.argv[0]) + '/../etc/mercurial'))
     rcpath.extend(rcfiles('/etc/mercurial'))
     rcpath.append(os.path.expanduser('~/.hgrc'))
     rcpath = [os.path.normpath(f) for f in rcpath]
 
     def parse_patch_output(output_line):
         """parses the output produced by patch and returns the file name"""
         pf = output_line[14:]
         if pf.startswith("'") and pf.endswith("'") and pf.find(" ") >= 0:
             pf = pf[1:-1] # Remove the quotes
         return pf
 
     def is_exec(f, last):
         """check whether a file is executable"""
         return (os.stat(f).st_mode & 0100 != 0)
 
     def set_exec(f, mode):
         s = os.stat(f).st_mode
         if (s & 0100 != 0) == mode:
             return
         if mode:
             # Turn on +x for every +r bit when making a file executable
             # and obey umask.
             umask = os.umask(0)
             os.umask(umask)
             os.chmod(f, s | (s & 0444) >> 2 & ~umask)
         else:
             os.chmod(f, s & 0666)
 
     def set_binary(fd):
         pass
 
     def pconvert(path):
         return path
 
     def localpath(path):
         return path
 
     normpath = os.path.normpath
 
     def makelock(info, pathname):
         try:
             os.symlink(info, pathname)
         except OSError, why:
             if why.errno == errno.EEXIST:
                 raise
             else:
                 _makelock_file(info, pathname)
 
     def readlock(pathname):
         try:
             return os.readlink(pathname)
         except OSError, why:
             if why.errno == errno.EINVAL:
                 return _readlock_file(pathname)
             else:
                 raise
 
     def explain_exit(code):
         """return a 2-tuple (desc, code) describing a process's status"""
         if os.WIFEXITED(code):
             val = os.WEXITSTATUS(code)
             return _("exited with status %d") % val, val
         elif os.WIFSIGNALED(code):
             val = os.WTERMSIG(code)
             return _("killed by signal %d") % val, val
         elif os.WIFSTOPPED(code):
             val = os.WSTOPSIG(code)
             return _("stopped by signal %d") % val, val
         raise ValueError(_("invalid exit code"))
 
 class chunkbuffer(object):
     """Allow arbitrary sized chunks of data to be efficiently read from an
     iterator over chunks of arbitrary size."""
 
     def __init__(self, in_iter, targetsize = 2**16):
         """in_iter is the iterator that's iterating over the input chunks.
         targetsize is how big a buffer to try to maintain."""
         self.in_iter = iter(in_iter)
         self.buf = ''
         self.targetsize = int(targetsize)
         if self.targetsize <= 0:
             raise ValueError(_("targetsize must be greater than 0, was %d") %
                              targetsize)
         self.iterempty = False
 
     def fillbuf(self):
         """Ignore target size; read every chunk from iterator until empty."""
         if not self.iterempty:
             collector = cStringIO.StringIO()
             collector.write(self.buf)
             for ch in self.in_iter:
                 collector.write(ch)
             self.buf = collector.getvalue()
             self.iterempty = True
 
     def read(self, l):
         """Read L bytes of data from the iterator of chunks of data.
         Returns less than L bytes if the iterator runs dry."""
         if l > len(self.buf) and not self.iterempty:
             # Clamp to a multiple of self.targetsize
             targetsize = self.targetsize * ((l // self.targetsize) + 1)
             collector = cStringIO.StringIO()
             collector.write(self.buf)
             collected = len(self.buf)
             for chunk in self.in_iter:
                 collector.write(chunk)
                 collected += len(chunk)
                 if collected >= targetsize:
                     break
             if collected < targetsize:
                 self.iterempty = True
             self.buf = collector.getvalue()
         s, self.buf = self.buf[:l], buffer(self.buf, l)
         return s
 
 def filechunkiter(f, size = 65536):
     """Create a generator that produces all the data in the file size
     (default 65536) bytes at a time.  Chunks may be less than size
     bytes if the chunk is the last chunk in the file, or the file is a
     socket or some other type of file that sometimes reads less data
     than is requested."""
     s = f.read(size)
     while len(s) > 0:
         yield s
         s = f.read(size)
 
 def makedate():
     lt = time.localtime()
     if lt[8] == 1 and time.daylight:
         tz = time.altzone
     else:
         tz = time.timezone
     return time.mktime(lt), tz
 
 def datestr(date=None, format='%c'):
     """represent a (unixtime, offset) tuple as a localized time.
     unixtime is seconds since the epoch, and offset is the time zone's
     number of seconds away from UTC."""
     t, tz = date or makedate()
     return ("%s %+03d%02d" %
             (time.strftime(format, time.gmtime(float(t) - tz)),
              -tz / 3600,
              ((-tz % 3600) / 60)))