Mercurial > hg
view mercurial/merge.py @ 2874:4ec58b157265
refactor text diff/patch code.
rename commands.dodiff to patch.diff.
rename commands.doexport to patch.export.
move some functions from commands to new mercurial.cmdutil module.
turn list of diff options into mdiff.diffopts class.
patch.diff and patch.export now has clean api for call from 3rd party
python code.
author | Vadim Gelfer <vadim.gelfer@gmail.com> |
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date | Sat, 12 Aug 2006 16:13:27 -0700 |
parents | b11c014dcbd9 |
children | 06c05c675a35 3d6efcbbd1c9 |
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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(), "util os tempfile") def merge3(repo, fn, my, other, p1, p2): """perform a 3-way merge in the working directory""" def temp(prefix, node): pre = "%s~%s." % (os.path.basename(fn), prefix) (fd, name) = tempfile.mkstemp(prefix=pre) f = os.fdopen(fd, "wb") repo.wwrite(fn, fl.read(node), f) f.close() return name fl = repo.file(fn) base = fl.ancestor(my, other) a = repo.wjoin(fn) b = temp("base", base) c = temp("other", other) repo.ui.note(_("resolving %s\n") % fn) repo.ui.debug(_("file %s: my %s other %s ancestor %s\n") % (fn, short(my), short(other), short(base))) 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': fn, 'HG_MY_NODE': p1, 'HG_OTHER_NODE': p2, 'HG_FILE_MY_NODE': hex(my), 'HG_FILE_OTHER_NODE': hex(other), 'HG_FILE_BASE_NODE': hex(base)}) if r: repo.ui.warn(_("merging %s failed!\n") % fn) os.unlink(b) os.unlink(c) return r 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 pl = repo.dirstate.parents() if not overwrite and pl[1] != nullid: raise util.Abort(_("outstanding uncommitted merges")) p1, p2 = pl[0], node pa = repo.changelog.ancestor(p1, p2) # is there a linear path from p1 to p2? linear_path = (pa == p1 or pa == p2) if branchmerge and linear_path: raise util.Abort(_("there is nothing to merge, just use " "'hg update' or look at 'hg heads'")) if not overwrite and not linear_path and not branchmerge: raise util.Abort(_("update spans branches, use 'hg merge' " "or 'hg update -C' to lose changes")) modified, added, removed, deleted, unknown = repo.changes() if branchmerge and not forcemerge: if modified or added or removed: raise util.Abort(_("outstanding uncommitted changes")) m1n = repo.changelog.read(p1)[0] m2n = repo.changelog.read(p2)[0] man = repo.manifest.ancestor(m1n, m2n) m1 = repo.manifest.read(m1n) m2 = repo.manifest.read(m2n).copy() ma = repo.manifest.read(man) if not forcemerge and not overwrite: for f in unknown: if f in m2: t1 = repo.wread(f) t2 = repo.file(f).read(m2[f]) if cmp(t1, t2) != 0: raise util.Abort(_("'%s' already exists in the working" " dir and differs from remote") % f) # 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 linear %s\n") % (overwrite, branchmerge, partial and True or False, linear_path)) repo.ui.debug(_(" ancestor %s local %s remote %s\n") % (short(man), short(m1n), short(m2n))) merge = {} get = {} remove = [] # construct a working dir manifest mw = m1.copy() umap = dict.fromkeys(unknown) for f in added + modified + unknown: mw[f] = "" mw.set(f, util.is_exec(repo.wjoin(f), mw.execf(f))) for f in deleted + removed: if f in mw: del mw[f] # 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. if not partial and linear_path and f not in m2: repo.dirstate.forget((f,)) # Compare manifests for f, n in mw.iteritems(): if partial and not partial(f): continue if f in m2: s = 0 # is the wfile new since m1, and match m2? if f not in m1: t1 = repo.wread(f) t2 = repo.file(f).read(m2[f]) if cmp(t1, t2) == 0: n = m2[f] del t1, t2 # are files different? if n != m2[f]: a = ma.get(f, nullid) # are both different from the ancestor? if n != a and m2[f] != a: repo.ui.debug(_(" %s versions differ, resolve\n") % f) # merge executable bits # "if we changed or they changed, change in merge" a, b, c = ma.execf(f), mw.execf(f), m2.execf(f) mode = ((a^b) | (a^c)) ^ a merge[f] = (mode, m1.get(f, nullid), m2[f]) s = 1 # are we clobbering? # is remote's version newer? # or are we going back in time? elif overwrite or m2[f] != a or (p2 == pa and mw[f] == m1[f]): repo.ui.debug(_(" remote %s is newer, get\n") % f) get[f] = (m2.execf(f), m2[f]) s = 1 elif f in umap or f in added: # this unknown file is the same as the checkout # we need to reset the dirstate if the file was added get[f] = (m2.execf(f), m2[f]) if not s and mw.execf(f) != m2.execf(f): if overwrite: repo.ui.debug(_(" updating permissions for %s\n") % f) util.set_exec(repo.wjoin(f), m2.execf(f)) else: a, b, c = ma.execf(f), mw.execf(f), m2.execf(f) mode = ((a^b) | (a^c)) ^ a if mode != b: repo.ui.debug(_(" updating permissions for %s\n") % f) util.set_exec(repo.wjoin(f), mode) del m2[f] elif f in ma: if n != ma[f]: r = _("d") if not overwrite and (linear_path or branchmerge): r = repo.ui.prompt( (_(" local changed %s which remote deleted\n") % f) + _("(k)eep or (d)elete?"), _("[kd]"), _("k")) if r == _("d"): remove.append(f) else: repo.ui.debug(_("other deleted %s\n") % f) remove.append(f) # other deleted it else: # file is created on branch or in working directory if overwrite and f not in umap: repo.ui.debug(_("remote deleted %s, clobbering\n") % f) remove.append(f) elif n == m1.get(f, nullid): # same as parent if p2 == pa: # going backwards? repo.ui.debug(_("remote deleted %s\n") % f) remove.append(f) else: repo.ui.debug(_("local modified %s, keeping\n") % f) else: repo.ui.debug(_("working dir created %s, keeping\n") % f) for f, n in m2.iteritems(): if partial and not partial(f): continue if f[0] == "/": continue if f in ma and n != ma[f]: r = _("k") if not overwrite and (linear_path or branchmerge): r = repo.ui.prompt( (_("remote changed %s which local deleted\n") % f) + _("(k)eep or (d)elete?"), _("[kd]"), _("k")) if r == _("k"): get[f] = (m2.execf(f), n) elif f not in ma: repo.ui.debug(_("remote created %s\n") % f) get[f] = (m2.execf(f), n) else: if overwrite or p2 == pa: # going backwards? repo.ui.debug(_("local deleted %s, recreating\n") % f) get[f] = (m2.execf(f), n) else: repo.ui.debug(_("local deleted %s\n") % f) del mw, m1, m2, ma if overwrite: for f in merge: get[f] = merge[f][:2] merge = {} if linear_path or overwrite: # we don't need to do any magic, just jump to the new rev p1, p2 = p2, nullid xp1 = hex(p1) xp2 = hex(p2) if p2 == nullid: xxp2 = '' else: xxp2 = xp2 repo.hook('preupdate', throw=True, parent1=xp1, parent2=xxp2) # get the files we don't need to change files = get.keys() files.sort() for f in files: flag, node = get[f] if f[0] == "/": continue repo.ui.note(_("getting %s\n") % f) t = repo.file(f).read(node) repo.wwrite(f, t) util.set_exec(repo.wjoin(f), flag) if not partial: if branchmerge: repo.dirstate.update([f], 'n', st_mtime=-1) else: repo.dirstate.update([f], 'n') # merge the tricky bits unresolved = [] files = merge.keys() files.sort() for f in files: repo.ui.status(_("merging %s\n") % f) flag, my, other = merge[f] ret = merge3(repo, f, my, other, xp1, xp2) if ret: unresolved.append(f) util.set_exec(repo.wjoin(f), flag) if not partial: if branchmerge: # We've done a branch merge, mark this file as merged # so that we properly record the merger later repo.dirstate.update([f], '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 = len(repo.file(f).read(other)) repo.dirstate.update([f], 'n', st_size=f_len, st_mtime=-1) remove.sort() for f in 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)) if not partial: if branchmerge: repo.dirstate.update(remove, 'r') else: repo.dirstate.forget(remove) if not partial: repo.dirstate.setparents(p1, p2) if show_stats: stats = ((len(get), _("updated")), (len(merge) - len(unresolved), _("merged")), (len(remove), _("removed")), (len(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" % (repo.changelog.rev(p1), repo.changelog.rev(p2)))) 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")) repo.hook('update', parent1=xp1, parent2=xxp2, error=len(unresolved)) return len(unresolved)