Mercurial > hg
view mercurial/merge.py @ 3310:0e370798eebf
context: add cmp for filectxs
author | Matt Mackall <mpm@selenic.com> |
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date | Tue, 10 Oct 2006 01:13:03 -0500 |
parents | e8be5942335d |
children | 966632304dde |
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# merge.py - directory-level update/merge handling for Mercurial # # Copyright 2006 Matt Mackall <mpm@selenic.com> # # This software may be used and distributed according to the terms # of the GNU General Public License, incorporated herein by reference. from node import * from i18n import gettext as _ from demandload import * demandload(globals(), "errno util os tempfile") def filemerge(repo, fw, fo, wctx, mctx): """perform a 3-way merge in the working directory fw = filename in the working directory and first parent fo = filename in other parent wctx, mctx = working and merge changecontexts TODO: if fw is copied in the working directory, we get confused implement move and fd """ def temp(prefix, ctx): pre = "%s~%s." % (os.path.basename(ctx.path()), prefix) (fd, name) = tempfile.mkstemp(prefix=pre) f = os.fdopen(fd, "wb") repo.wwrite(ctx.path(), ctx.data(), f) f.close() return name fcm = wctx.filectx(fw) fco = mctx.filectx(fo) fca = fcm.ancestor(fco) if not fca: fca = repo.filectx(fw, fileid=-1) a = repo.wjoin(fw) b = temp("base", fca) c = temp("other", fco) repo.ui.note(_("resolving %s\n") % fw) repo.ui.debug(_("my %s other %s ancestor %s\n") % (fcm, fco, fca)) cmd = (os.environ.get("HGMERGE") or repo.ui.config("ui", "merge") or "hgmerge") r = util.system('%s "%s" "%s" "%s"' % (cmd, a, b, c), cwd=repo.root, environ={'HG_FILE': fw, 'HG_MY_NODE': str(wctx.parents()[0]), 'HG_OTHER_NODE': str(mctx)}) if r: repo.ui.warn(_("merging %s failed!\n") % fw) os.unlink(b) os.unlink(c) return r def checkunknown(repo, m2, wctx): """ check for collisions between unknown files and files in m2 """ for f in wctx.unknown(): if f in m2: if repo.file(f).cmp(m2[f], repo.wread(f)): raise util.Abort(_("'%s' already exists in the working" " dir and differs from remote") % f) def forgetremoved(m2, wctx): """ Forget removed files If we're jumping between revisions (as opposed to merging), and if neither the working directory nor the target rev has the file, then we need to remove it from the dirstate, to prevent the dirstate from listing the file when it is no longer in the manifest. """ action = [] for f in wctx.deleted() + wctx.removed(): if f not in m2: action.append((f, "f")) return action def nonoverlap(d1, d2): """ Return list of elements in d1 not in d2 """ l = [] for d in d1: if d not in d2: l.append(d) l.sort() return l def findold(fctx, limit): """ find files that path was copied from, back to linkrev limit """ old = {} orig = fctx.path() visit = [fctx] while visit: fc = visit.pop() if fc.rev() < limit: continue if fc.path() != orig and fc.path() not in old: old[fc.path()] = 1 visit += fc.parents() old = old.keys() old.sort() return old def findcopies(repo, m1, m2, limit): """ Find moves and copies between m1 and m2 back to limit linkrev """ if not repo.ui.config("merge", "followcopies"): return {} # avoid silly behavior for update from empty dir if not m1: return {} dcopies = repo.dirstate.copies() copy = {} match = {} u1 = nonoverlap(m1, m2) u2 = nonoverlap(m2, m1) ctx = util.cachefunc(lambda f,n: repo.filectx(f, fileid=n[:20])) def checkpair(c, f2, man): ''' check if an apparent pair actually matches ''' c2 = ctx(f2, man[f2]) ca = c.ancestor(c2) if ca and ca.path() == c.path() or ca.path() == c2.path(): copy[c.path()] = f2 copy[f2] = c.path() for f in u1: c = ctx(dcopies.get(f, f), m1[f]) for of in findold(c, limit): if of in m2: checkpair(c, of, m2) else: match.setdefault(of, []).append(f) for f in u2: c = ctx(f, m2[f]) for of in findold(c, limit): if of in m1: checkpair(c, of, m1) elif of in match: for mf in match[of]: checkpair(c, mf, m1) return copy def manifestmerge(repo, p1, p2, pa, overwrite, partial): """ Merge manifest m1 with m2 using ancestor ma and generate merge action list """ m1 = p1.manifest() m2 = p2.manifest() ma = pa.manifest() backwards = (pa == p2) def fmerge(f, f2=None, fa=None): """merge executable flags""" if not f2: f2 = f fa = f a, b, c = ma.execf(fa), m1.execf(f), m2.execf(f2) return ((a^b) | (a^c)) ^ a action = [] def act(msg, m, f, *args): repo.ui.debug(" %s: %s -> %s\n" % (f, msg, m)) action.append((f, m) + args) copy = {} if not (backwards or overwrite): copy = findcopies(repo, m1, m2, pa.rev()) # Compare manifests for f, n in m1.iteritems(): if partial and not partial(f): continue if f in m2: # are files different? if n != m2[f]: a = ma.get(f, nullid) # are both different from the ancestor? if not overwrite and n != a and m2[f] != a: act("versions differ", "m", f, f, f, fmerge(f), False) # are we clobbering? # is remote's version newer? # or are we going back in time and clean? elif overwrite or m2[f] != a or (backwards and not n[20:]): act("remote is newer", "g", f, m2.execf(f)) # local is newer, not overwrite, check mode bits elif fmerge(f) != m1.execf(f): act("update permissions", "e", f, m2.execf(f)) # contents same, check mode bits elif m1.execf(f) != m2.execf(f): if overwrite or fmerge(f) != m1.execf(f): act("update permissions", "e", f, m2.execf(f)) elif f in copy: f2 = copy[f] if f in ma: # case 3,20 A/B/A act("remote moved", "m", f, f2, f2, fmerge(f, f2, f), True) else: if f2 in m1: # case 2 A,B/B/B act("local copied", "m", f, f2, f, fmerge(f, f2, f2), False) else: # case 4,21 A/B/B act("local moved", "m", f, f2, f, fmerge(f, f2, f2), False) elif f in ma: if n != ma[f] and not overwrite: if repo.ui.prompt( (_(" local changed %s which remote deleted\n") % f) + _("(k)eep or (d)elete?"), _("[kd]"), _("k")) == _("d"): act("prompt delete", "r", f) else: act("other deleted", "r", f) else: # file is created on branch or in working directory if (overwrite and n[20:] != "u") or (backwards and not n[20:]): act("remote deleted", "r", f) for f, n in m2.iteritems(): if partial and not partial(f): continue if f in m1: continue if f in copy: f2 = copy[f] if f2 not in m2: # already seen continue # rename case 1, A/A,B/A act("remote copied", "m", f2, f, f, fmerge(f2, f, f2), False) elif f in ma: if overwrite or backwards: act("recreating", "g", f, m2.execf(f)) elif n != ma[f]: if repo.ui.prompt( (_("remote changed %s which local deleted\n") % f) + _("(k)eep or (d)elete?"), _("[kd]"), _("k")) == _("k"): act("prompt recreating", "g", f, m2.execf(f)) else: act("remote created", "g", f, m2.execf(f)) return action def applyupdates(repo, action, wctx, mctx): updated, merged, removed, unresolved = 0, 0, 0, 0 action.sort() for a in action: f, m = a[:2] if f[0] == "/": continue if m == "r": # remove repo.ui.note(_("removing %s\n") % f) util.audit_path(f) try: util.unlink(repo.wjoin(f)) except OSError, inst: if inst.errno != errno.ENOENT: repo.ui.warn(_("update failed to remove %s: %s!\n") % (f, inst.strerror)) removed +=1 elif m == "m": # merge f2, fd, flag, move = a[2:] if f != f2: repo.ui.status(_("merging %s and %s to %s\n") % (f, f2, fd)) else: repo.ui.status(_("merging %s\n") % f) if filemerge(repo, f, f2, wctx, mctx): unresolved += 1 else: if f != fd: repo.ui.debug(_("copying %s to %s\n") % (f, fd)) repo.wwrite(fd, repo.wread(f)) if move: repo.ui.debug(_("removing %s\n") % f) os.unlink(repo.wjoin(f)) util.set_exec(repo.wjoin(fd), flag) merged += 1 elif m == "g": # get flag = a[2] repo.ui.note(_("getting %s\n") % f) t = mctx.filectx(f).data() repo.wwrite(f, t) util.set_exec(repo.wjoin(f), flag) updated += 1 elif m == "e": # exec flag = a[2] util.set_exec(repo.wjoin(f), flag) return updated, merged, removed, unresolved def recordupdates(repo, action, branchmerge, mctx): for a in action: f, m = a[:2] if m == "r": # remove if branchmerge: repo.dirstate.update([f], 'r') else: repo.dirstate.forget([f]) elif m == "f": # forget repo.dirstate.forget([f]) elif m == "g": # get if branchmerge: repo.dirstate.update([f], 'n', st_mtime=-1) else: repo.dirstate.update([f], 'n') elif m == "m": # merge f2, fd, flag, move = a[2:] if branchmerge: # We've done a branch merge, mark this file as merged # so that we properly record the merger later repo.dirstate.update([fd], 'm') else: # We've update-merged a locally modified file, so # we set the dirstate to emulate a normal checkout # of that file some time in the past. Thus our # merge will appear as a normal local file # modification. f_len = mctx.filectx(f).size() repo.dirstate.update([fd], 'n', st_size=f_len, st_mtime=-1) if f != f2: # copy/rename if move: repo.dirstate.update([f], 'r') if f != fd: repo.dirstate.copy(f, fd) else: repo.dirstate.copy(f2, fd) def update(repo, node, branchmerge=False, force=False, partial=None, wlock=None, show_stats=True, remind=True): overwrite = force and not branchmerge forcemerge = force and branchmerge if not wlock: wlock = repo.wlock() ### check phase wc = repo.workingctx() pl = wc.parents() if not overwrite and len(pl) > 1: raise util.Abort(_("outstanding uncommitted merges")) p1, p2 = pl[0], repo.changectx(node) pa = p1.ancestor(p2) # is there a linear path from p1 to p2? if pa == p1 or pa == p2: if branchmerge: raise util.Abort(_("there is nothing to merge, just use " "'hg update' or look at 'hg heads'")) elif not (overwrite or branchmerge): raise util.Abort(_("update spans branches, use 'hg merge' " "or 'hg update -C' to lose changes")) if branchmerge and not forcemerge: if wc.modified() or wc.added() or wc.removed(): raise util.Abort(_("outstanding uncommitted changes")) m1 = wc.manifest() m2 = p2.manifest() # resolve the manifest to determine which files # we care about merging repo.ui.note(_("resolving manifests\n")) repo.ui.debug(_(" overwrite %s branchmerge %s partial %s\n") % (overwrite, branchmerge, bool(partial))) repo.ui.debug(_(" ancestor %s local %s remote %s\n") % (p1, p2, pa)) action = [] if not force: checkunknown(repo, m2, wc) if not branchmerge: action += forgetremoved(m2, wc) action += manifestmerge(repo, wc, p2, pa, overwrite, partial) ### apply phase if not branchmerge: # just jump to the new rev fp1, fp2, xp1, xp2 = p2.node(), nullid, str(p2), '' else: fp1, fp2, xp1, xp2 = p1.node(), p2.node(), str(p1), str(p2) if not partial: repo.hook('preupdate', throw=True, parent1=xp1, parent2=xp2) updated, merged, removed, unresolved = applyupdates(repo, action, wc, p2) # update dirstate if not partial: recordupdates(repo, action, branchmerge, p2) repo.dirstate.setparents(fp1, fp2) repo.hook('update', parent1=xp1, parent2=xp2, error=unresolved) if show_stats: stats = ((updated, _("updated")), (merged - unresolved, _("merged")), (removed, _("removed")), (unresolved, _("unresolved"))) note = ", ".join([_("%d files %s") % s for s in stats]) repo.ui.status("%s\n" % note) if not partial: if branchmerge: if unresolved: repo.ui.status(_("There are unresolved merges," " you can redo the full merge using:\n" " hg update -C %s\n" " hg merge %s\n" % (p1.rev(), p2.rev()))) elif remind: repo.ui.status(_("(branch merge, don't forget to commit)\n")) elif unresolved: repo.ui.status(_("There are unresolved merges with" " locally modified files.\n")) return unresolved