author | Matt Mackall <mpm@selenic.com> |
Mon, 11 Jun 2007 21:09:23 -0500 | |
changeset 4544 | 930ed513c864 |
parent 4534 | cc9b79216a76 |
child 4588 | 9855939d0c82 |
permissions | -rw-r--r-- |
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# convert.py Foreign SCM converter |
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# |
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# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com> |
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# |
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# This software may be used and distributed according to the terms |
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# of the GNU General Public License, incorporated herein by reference. |
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from common import NoRepo |
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from cvs import convert_cvs |
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from git import convert_git |
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from hg import convert_mercurial |
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|
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import os |
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from mercurial import hg, ui, util, commands |
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commands.norepo += " convert" |
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converters = [convert_cvs, convert_git, convert_mercurial] |
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def converter(ui, path): |
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if not os.path.isdir(path): |
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raise util.Abort("%s: not a directory" % path) |
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for c in converters: |
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try: |
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return c(ui, path) |
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except NoRepo: |
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pass |
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raise util.Abort("%s: unknown repository type" % path) |
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class convert(object): |
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def __init__(self, ui, source, dest, mapfile, opts): |
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self.source = source |
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self.dest = dest |
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self.ui = ui |
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self.mapfile = mapfile |
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self.opts = opts |
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self.commitcache = {} |
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self.map = {} |
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try: |
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for l in file(self.mapfile): |
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sv, dv = l[:-1].split() |
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self.map[sv] = dv |
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except IOError: |
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pass |
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def walktree(self, heads): |
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visit = heads |
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known = {} |
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parents = {} |
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while visit: |
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n = visit.pop(0) |
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if n in known or n in self.map: continue |
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known[n] = 1 |
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self.commitcache[n] = self.source.getcommit(n) |
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cp = self.commitcache[n].parents |
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for p in cp: |
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parents.setdefault(n, []).append(p) |
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visit.append(p) |
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return parents |
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def toposort(self, parents): |
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visit = parents.keys() |
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seen = {} |
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children = {} |
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while visit: |
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n = visit.pop(0) |
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if n in seen: continue |
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seen[n] = 1 |
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pc = 0 |
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if n in parents: |
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for p in parents[n]: |
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if p not in self.map: pc += 1 |
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visit.append(p) |
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children.setdefault(p, []).append(n) |
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if not pc: root = n |
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s = [] |
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removed = {} |
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visit = children.keys() |
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while visit: |
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n = visit.pop(0) |
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if n in removed: continue |
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dep = 0 |
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if n in parents: |
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for p in parents[n]: |
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if p in self.map: continue |
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if p not in removed: |
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# we're still dependent |
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visit.append(n) |
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dep = 1 |
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break |
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if not dep: |
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# all n's parents are in the list |
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removed[n] = 1 |
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if n not in self.map: |
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s.append(n) |
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if n in children: |
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for c in children[n]: |
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visit.insert(0, c) |
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if self.opts.get('datesort'): |
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depth = {} |
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for n in s: |
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depth[n] = 0 |
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pl = [p for p in self.commitcache[n].parents |
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if p not in self.map] |
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if pl: |
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depth[n] = max([depth[p] for p in pl]) + 1 |
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114 |
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s = [(depth[n], self.commitcache[n].date, n) for n in s] |
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s.sort() |
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s = [e[2] for e in s] |
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return s |
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def copy(self, rev): |
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c = self.commitcache[rev] |
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files = self.source.getchanges(rev) |
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for f, v in files: |
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try: |
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data = self.source.getfile(f, v) |
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except IOError, inst: |
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self.dest.delfile(f) |
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else: |
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e = self.source.getmode(f, v) |
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self.dest.putfile(f, e, data) |
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r = [self.map[v] for v in c.parents] |
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f = [f for f, v in files] |
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self.map[rev] = self.dest.putcommit(f, r, c) |
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file(self.mapfile, "a").write("%s %s\n" % (rev, self.map[rev])) |
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def convert(self): |
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self.ui.status("scanning source...\n") |
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heads = self.source.getheads() |
142 |
parents = self.walktree(heads) |
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self.ui.status("sorting...\n") |
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t = self.toposort(parents) |
145 |
num = len(t) |
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c = None |
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self.ui.status("converting...\n") |
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for c in t: |
150 |
num -= 1 |
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desc = self.commitcache[c].desc |
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if "\n" in desc: |
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desc = desc.splitlines()[0] |
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self.ui.status("%d %s\n" % (num, desc)) |
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self.copy(c) |
156 |
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694 | 157 |
tags = self.source.gettags() |
158 |
ctags = {} |
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159 |
for k in tags: |
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160 |
v = tags[k] |
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161 |
if v in self.map: |
|
162 |
ctags[k] = self.map[v] |
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163 |
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if c and ctags: |
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nrev = self.dest.puttags(ctags) |
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# write another hash correspondence to override the previous |
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# one so we don't end up with extra tag heads |
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if nrev: |
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file(self.mapfile, "a").write("%s %s\n" % (c, nrev)) |
694 | 170 |
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def _convert(ui, src, dest=None, mapfile=None, **opts): |
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'''Convert a foreign SCM repository to a Mercurial one. |
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174 |
Accepted source formats: |
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- GIT |
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- CVS |
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|
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Accepted destination formats: |
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179 |
- Mercurial |
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If destination isn't given, a new Mercurial repo named <src>-hg will |
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182 |
be created. If <mapfile> isn't given, it will be put in a default |
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183 |
location (<dest>/.hg/shamap by default) |
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185 |
The <mapfile> is a simple text file that maps each source commit ID to |
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186 |
the destination ID for that revision, like so: |
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187 |
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188 |
<source ID> <destination ID> |
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If the file doesn't exist, it's automatically created. It's updated |
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on each commit copied, so convert-repo can be interrupted and can |
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be run repeatedly to copy new commits. |
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''' |
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srcc = converter(ui, src) |
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if not hasattr(srcc, "getcommit"): |
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raise util.Abort("%s: can't read from this repo type" % src) |
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if not dest: |
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dest = src + "-hg" |
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ui.status("assuming destination %s\n" % dest) |
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# Try to be smart and initalize things when required |
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if os.path.isdir(dest): |
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if len(os.listdir(dest)) > 0: |
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try: |
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hg.repository(ui, dest) |
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ui.status("destination %s is a Mercurial repository\n" % dest) |
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except hg.RepoError: |
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raise util.Abort( |
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"destination directory %s is not empty.\n" |
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"Please specify an empty directory to be initialized\n" |
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"or an already initialized mercurial repository" |
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% dest) |
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else: |
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ui.status("initializing destination %s repository\n" % dest) |
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hg.repository(ui, dest, create=True) |
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elif os.path.exists(dest): |
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raise util.Abort("destination %s exists and is not a directory" % dest) |
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else: |
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ui.status("initializing destination %s repository\n" % dest) |
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hg.repository(ui, dest, create=True) |
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destc = converter(ui, dest) |
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if not hasattr(destc, "putcommit"): |
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raise util.Abort("%s: can't write to this repo type" % src) |
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if not mapfile: |
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try: |
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mapfile = destc.mapfile() |
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except: |
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mapfile = os.path.join(destc, "map") |
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c = convert(ui, srcc, destc, mapfile, opts) |
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c.convert() |
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cmdtable = { |
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"convert": |
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(_convert, |
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[('', 'datesort', None, 'try to sort changesets by date')], |
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'hg convert [OPTION]... SOURCE [DEST [MAPFILE]]'), |
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} |