merge with crew

hgext/imerge.py

@@ -1,362 +1,405
 # Copyright (C) 2007 Brendan Cully <[e-mail]>
 # Published under the GNU GPL
 
 '''
 imerge - interactive merge
 '''
 
 from mercurial.i18n import _
 from mercurial.node import *
-from mercurial import commands, cmdutil, fancyopts, hg, merge, util
+from mercurial import commands, cmdutil, dispatch, fancyopts, hg, merge, util
 import os, tarfile
 
 class InvalidStateFileException(Exception): pass
 
 class ImergeStateFile(object):
     def __init__(self, im):
         self.im = im
 
     def save(self, dest):
         tf = tarfile.open(dest, 'w:gz')
 
         st = os.path.join(self.im.path, 'status')
         tf.add(st, os.path.join('.hg', 'imerge', 'status'))
 
         for f in self.im.resolved:
             (fd, fo) = self.im.conflicts[f]
             abssrc = self.im.repo.wjoin(fd)
             tf.add(abssrc, fd)
 
         tf.close()
 
     def load(self, source):
         wlock = self.im.repo.wlock()
         lock = self.im.repo.lock()
 
         tf = tarfile.open(source, 'r')
         contents = tf.getnames()
         # tarfile normalizes path separators to '/'
         statusfile = '.hg/imerge/status'
         if statusfile not in contents:
             raise InvalidStateFileException('no status file')
 
         tf.extract(statusfile, self.im.repo.root)
         p1, p2 = self.im.load()
         if self.im.repo.dirstate.parents()[0] != p1.node():
             hg.clean(self.im.repo, p1.node())
         self.im.start(p2.node())
         for tarinfo in tf:
             tf.extract(tarinfo, self.im.repo.root)
         self.im.load()
 
 class Imerge(object):
     def __init__(self, ui, repo):
         self.ui = ui
         self.repo = repo
 
         self.path = repo.join('imerge')
         self.opener = util.opener(self.path)
 
         self.wctx = self.repo.workingctx()
         self.conflicts = {}
         self.resolved = []
 
     def merging(self):
         return len(self.wctx.parents()) > 1
 
     def load(self):
         # status format. \0-delimited file, fields are
         # p1, p2, conflict count, conflict filenames, resolved filenames
         # conflict filenames are tuples of localname, remoteorig, remotenew
 
         statusfile = self.opener('status')
 
         status = statusfile.read().split('\0')
         if len(status) < 3:
             raise util.Abort('invalid imerge status file')
 
         try:
             parents = [self.repo.changectx(n) for n in status[:2]]
         except LookupError:
             raise util.Abort('merge parent %s not in repository' % short(p))
 
         status = status[2:]
         conflicts = int(status.pop(0)) * 3
         self.resolved = status[conflicts:]
         for i in xrange(0, conflicts, 3):
             self.conflicts[status[i]] = (status[i+1], status[i+2])
 
         return parents
 
     def save(self):
         lock = self.repo.lock()
 
         if not os.path.isdir(self.path):
             os.mkdir(self.path)
         statusfile = self.opener('status', 'wb')
 
         out = [hex(n.node()) for n in self.wctx.parents()]
         out.append(str(len(self.conflicts)))
         conflicts = self.conflicts.items()
         conflicts.sort()
         for fw, fd_fo in conflicts:
             out.append(fw)
             out.extend(fd_fo)
         out.extend(self.resolved)
 
         statusfile.write('\0'.join(out))
 
     def remaining(self):
         return [f for f in self.conflicts if f not in self.resolved]
 
-    def filemerge(self, fn):
+    def filemerge(self, fn, interactive=True):
         wlock = self.repo.wlock()
 
         (fd, fo) = self.conflicts[fn]
-        p2 = self.wctx.parents()[1]
-        return merge.filemerge(self.repo, fn, fd, fo, self.wctx, p2)
+        p1, p2 = self.wctx.parents()
+
+        # this could be greatly improved
+        realmerge = os.environ.get('HGMERGE')
+        if not interactive:
+            os.environ['HGMERGE'] = 'merge'
+
+        # The filemerge ancestor algorithm does not work if self.wctx
+        # already has two parents (in normal merge it doesn't yet). But
+        # this is very dirty.
+        self.wctx._parents.pop()
+        try:
+            # TODO: we should probably revert the file if merge fails
+            return merge.filemerge(self.repo, fn, fd, fo, self.wctx, p2)
+        finally:
+            self.wctx._parents.append(p2)
+            if realmerge:
+                os.environ['HGMERGE'] = realmerge
+            elif not interactive:
+                del os.environ['HGMERGE']
 
     def start(self, rev=None):
         _filemerge = merge.filemerge
         def filemerge(repo, fw, fd, fo, wctx, mctx):
             self.conflicts[fw] = (fd, fo)
 
         merge.filemerge = filemerge
         commands.merge(self.ui, self.repo, rev=rev)
         merge.filemerge = _filemerge
 
         self.wctx = self.repo.workingctx()
         self.save()
 
     def resume(self):
         self.load()
 
         dp = self.repo.dirstate.parents()
         p1, p2 = self.wctx.parents()
         if p1.node() != dp[0] or p2.node() != dp[1]:
             raise util.Abort('imerge state does not match working directory')
 
     def next(self):
         remaining = self.remaining()
         return remaining and remaining[0]
 
     def resolve(self, files):
         resolved = dict.fromkeys(self.resolved)
         for fn in files:
             if fn not in self.conflicts:
                 raise util.Abort('%s is not in the merge set' % fn)
             resolved[fn] = True
         self.resolved = resolved.keys()
         self.resolved.sort()
         self.save()
         return 0
 
     def unresolve(self, files):
         resolved = dict.fromkeys(self.resolved)
         for fn in files:
             if fn not in resolved:
                 raise util.Abort('%s is not resolved' % fn)
             del resolved[fn]
         self.resolved = resolved.keys()
         self.resolved.sort()
         self.save()
         return 0
 
     def pickle(self, dest):
         '''write current merge state to file to be resumed elsewhere'''
         state = ImergeStateFile(self)
         return state.save(dest)
 
     def unpickle(self, source):
         '''read merge state from file'''
         state = ImergeStateFile(self)
         return state.load(source)
 
 def load(im, source):
     if im.merging():
         raise util.Abort('there is already a merge in progress '
                          '(update -C <rev> to abort it)' )
     m, a, r, d =  im.repo.status()[:4]
     if m or a or r or d:
         raise util.Abort('working directory has uncommitted changes')
 
     rc = im.unpickle(source)
     if not rc:
         status(im)
     return rc
 
-def merge_(im, filename=None):
+def merge_(im, filename=None, auto=False):
+    success = True
+    if auto and not filename:
+        for fn in im.remaining():
+            rc = im.filemerge(fn, interactive=False)
+            if rc:
+                success = False
+            else:
+                im.resolve([fn])
+        if success:
+            im.ui.write('all conflicts resolved\n')
+        else:
+            status(im)
+        return 0
+
     if not filename:
         filename = im.next()
         if not filename:
             im.ui.write('all conflicts resolved\n')
             return 0
 
-    rc = im.filemerge(filename)
+    rc = im.filemerge(filename, interactive=not auto)
     if not rc:
         im.resolve([filename])
         if not im.next():
             im.ui.write('all conflicts resolved\n')
-            return 0
     return rc
 
 def next(im):
     n = im.next()
     if n:
         im.ui.write('%s\n' % n)
     else:
         im.ui.write('all conflicts resolved\n')
     return 0
 
 def resolve(im, *files):
     if not files:
         raise util.Abort('resolve requires at least one filename')
     return im.resolve(files)
 
 def save(im, dest):
     return im.pickle(dest)
 
 def status(im, **opts):
     if not opts.get('resolved') and not opts.get('unresolved'):
         opts['resolved'] = True
         opts['unresolved'] = True
 
     if im.ui.verbose:
         p1, p2 = [short(p.node()) for p in im.wctx.parents()]
         im.ui.note(_('merging %s and %s\n') % (p1, p2))
 
     conflicts = im.conflicts.keys()
     conflicts.sort()
     remaining = dict.fromkeys(im.remaining())
     st = []
     for fn in conflicts:
         if opts.get('no_status'):
             mode = ''
         elif fn in remaining:
             mode = 'U '
         else:
             mode = 'R '
         if ((opts.get('resolved') and fn not in remaining)
             or (opts.get('unresolved') and fn in remaining)):
             st.append((mode, fn))
     st.sort()
     for (mode, fn) in st:
         if im.ui.verbose:
             fo, fd = im.conflicts[fn]
             if fd != fn:
                 fn = '%s (%s)' % (fn, fd)
         im.ui.write('%s%s\n' % (mode, fn))
     if opts.get('unresolved') and not remaining:
         im.ui.write(_('all conflicts resolved\n'))
 
     return 0
 
 def unresolve(im, *files):
     if not files:
         raise util.Abort('unresolve requires at least one filename')
     return im.unresolve(files)
 
 subcmdtable = {
     'load': (load, []),
-    'merge': (merge_, []),
+    'merge':
+        (merge_,
+         [('a', 'auto', None, _('automatically resolve if possible'))]),
     'next': (next, []),
     'resolve': (resolve, []),
     'save': (save, []),
-    'status': (status,
-               [('n', 'no-status', None, _('hide status prefix')),
-                ('', 'resolved', None, _('only show resolved conflicts')),
-                ('', 'unresolved', None, _('only show unresolved conflicts'))]),
+    'status':
+        (status,
+         [('n', 'no-status', None, _('hide status prefix')),
+          ('', 'resolved', None, _('only show resolved conflicts')),
+          ('', 'unresolved', None, _('only show unresolved conflicts'))]),
     'unresolve': (unresolve, [])
 }
 
-def dispatch(im, args, opts):
+def dispatch_(im, args, opts):
     def complete(s, choices):
         candidates = []
         for choice in choices:
             if choice.startswith(s):
                 candidates.append(choice)
         return candidates
 
     c, args = args[0], list(args[1:])
     cmd = complete(c, subcmdtable.keys())
     if not cmd:
         raise cmdutil.UnknownCommand('imerge ' + c)
     if len(cmd) > 1:
         cmd.sort()
         raise cmdutil.AmbiguousCommand('imerge ' + c, cmd)
     cmd = cmd[0]
 
     func, optlist = subcmdtable[cmd]
     opts = {}
     try:
         args = fancyopts.fancyopts(args, optlist, opts)
         return func(im, *args, **opts)
     except fancyopts.getopt.GetoptError, inst:
-        raise cmdutil.ParseError('imerge', '%s: %s' % (cmd, inst))
+        raise dispatch.ParseError('imerge', '%s: %s' % (cmd, inst))
     except TypeError:
-        raise cmdutil.ParseError('imerge', _('%s: invalid arguments') % cmd)
+        raise dispatch.ParseError('imerge', _('%s: invalid arguments') % cmd)
 
 def imerge(ui, repo, *args, **opts):
     '''interactive merge
 
     imerge lets you split a merge into pieces. When you start a merge
     with imerge, the names of all files with conflicts are recorded.
     You can then merge any of these files, and if the merge is
     successful, they will be marked as resolved. When all files are
     resolved, the merge is complete.
 
     If no merge is in progress, hg imerge [rev] will merge the working
     directory with rev (defaulting to the other head if the repository
     only has two heads). You may also resume a saved merge with
     hg imerge load <file>.
 
     If a merge is in progress, hg imerge will default to merging the
     next unresolved file.
 
     The following subcommands are available:
 
     status:
       show the current state of the merge
+      options:
+        -n --no-status:  do not print the status prefix
+           --resolved:   only print resolved conflicts
+           --unresolved: only print unresolved conflicts
     next:
       show the next unresolved file merge
     merge [<file>]:
       merge <file>. If the file merge is successful, the file will be
       recorded as resolved. If no file is given, the next unresolved
       file will be merged.
     resolve <file>...:
       mark files as successfully merged
     unresolve <file>...:
       mark files as requiring merging.
     save <file>:
       save the state of the merge to a file to be resumed elsewhere
     load <file>:
       load the state of the merge from a file created by save
     '''
 
     im = Imerge(ui, repo)
 
     if im.merging():
         im.resume()
     else:
         rev = opts.get('rev')
         if rev and args:
             raise util.Abort('please specify just one revision')
 
         if len(args) == 2 and args[0] == 'load':
             pass
         else:
             if args:
                 rev = args[0]
             im.start(rev=rev)
-            args = ['status']
+            if opts.get('auto'):
+                args = ['merge', '--auto']
+            else:
+                args = ['status']
 
     if not args:
         args = ['merge']
 
-    return dispatch(im, args, opts)
+    return dispatch_(im, args, opts)
 
 cmdtable = {
     '^imerge':
     (imerge,
-     [('r', 'rev', '', _('revision to merge'))], 'hg imerge [command]')
+     [('r', 'rev', '', _('revision to merge')),
+      ('a', 'auto', None, _('automatically merge where possible'))],
+      'hg imerge [command]')
 }