Mercurial > hg > mercurial-crew-with-dirclash
view contrib/convert-repo @ 3541:881064004fd0
use untrusted settings in hgweb
The only exceptions are web.static and web.templates, since they can
be used to get any file that is readable by the user running the CGI
script.
Other options can be (ab)used to increase the use of the cpu
(allow_bz2) or of the bandwidth (server.uncompressed), but they're
trusted anyway.
author | Alexis S. L. Carvalho <alexis@cecm.usp.br> |
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date | Thu, 26 Oct 2006 19:25:45 +0200 |
parents | e6a7a6a33a62 |
children | 158fce02dc40 |
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#!/usr/bin/env python # # This is a generalized framework for converting between SCM # repository formats. # # In its current form, it's hardcoded to convert incrementally between # git and Mercurial. # # To use, you must first import the first git version into Mercurial, # and establish a mapping between the git commit hash and the hash in # Mercurial for that version. This mapping is kept in a simple text # file with lines like so: # # <git hash> <mercurial hash> # # To convert the rest of the repo, run: # # convert-repo <git-dir> <hg-dir> <mapfile> # # This updates the mapfile on each commit copied, so it can be # interrupted and can be run repeatedly to copy new commits. import sys, os, zlib, sha, time from mercurial import hg, ui, util class convert_git: def __init__(self, path): self.path = path def getheads(self): fh = os.popen("GIT_DIR=%s git-rev-parse --verify HEAD" % self.path) return [fh.read()[:-1]] def catfile(self, rev, type): if rev == "0" * 40: raise IOError() fh = os.popen("GIT_DIR=%s git-cat-file %s %s 2>/dev/null" % (self.path, type, rev)) return fh.read() def getfile(self, name, rev): return self.catfile(rev, "blob") def getchanges(self, version): fh = os.popen("GIT_DIR=%s git-diff-tree --root -m -r %s" % (self.path, version)) changes = [] for l in fh: if "\t" not in l: continue m, f = l[:-1].split("\t") m = m.split() h = m[3] p = (m[1] == "100755") changes.append((f, h, p)) return changes def getcommit(self, version): c = self.catfile(version, "commit") # read the commit hash end = c.find("\n\n") message = c[end+2:] l = c[:end].splitlines() manifest = l[0].split()[1] parents = [] for e in l[1:]: n,v = e.split(" ", 1) if n == "author": p = v.split() tm, tz = p[-2:] author = " ".join(p[:-2]) if author[0] == "<": author = author[1:-1] if n == "committer": p = v.split() tm, tz = p[-2:] committer = " ".join(p[:-2]) if committer[0] == "<": committer = committer[1:-1] message += "\ncommitter: %s\n" % v if n == "parent": parents.append(v) tzs, tzh, tzm = tz[-5:-4] + "1", tz[-4:-2], tz[-2:] tz = -int(tzs) * (int(tzh) * 3600 + int(tzm)) date = tm + " " + str(tz) return (parents, author, date, message) def gettags(self): tags = {} for f in os.listdir(self.path + "/refs/tags"): try: h = file(self.path + "/refs/tags/" + f).read().strip() c = self.catfile(h, "tag") # read the commit hash h = c.splitlines()[0].split()[1] tags[f] = h except: pass return tags class convert_mercurial: def __init__(self, path): self.path = path u = ui.ui() self.repo = hg.repository(u, path) def getheads(self): h = self.repo.changelog.heads() return [ hg.hex(x) for x in h ] def putfile(self, f, e, data): self.repo.wfile(f, "w").write(data) if self.repo.dirstate.state(f) == '?': self.repo.dirstate.update([f], "a") util.set_exec(self.repo.wjoin(f), e) def delfile(self, f): try: os.unlink(self.repo.wjoin(f)) #self.repo.remove([f]) except: pass def putcommit(self, files, parents, author, dest, text): seen = {} pl = [] for p in parents: if p not in seen: pl.append(p) seen[p] = 1 parents = pl if len(parents) < 2: parents.append("0" * 40) if len(parents) < 2: parents.append("0" * 40) p2 = parents.pop(0) while parents: p1 = p2 p2 = parents.pop(0) self.repo.rawcommit(files, text, author, dest, hg.bin(p1), hg.bin(p2)) text = "(octopus merge fixup)\n" p2 = hg.hex(self.repo.changelog.tip()) return p2 def puttags(self, tags): try: old = self.repo.wfile(".hgtags").read() oldlines = old.splitlines(1) oldlines.sort() except: oldlines = [] k = tags.keys() k.sort() newlines = [] for tag in k: newlines.append("%s %s\n" % (tags[tag], tag)) newlines.sort() if newlines != oldlines: #print "updating tags" f = self.repo.wfile(".hgtags", "w") f.write("".join(newlines)) f.close() if not oldlines: self.repo.add([".hgtags"]) date = "%s 0" % int(time.mktime(time.gmtime())) self.repo.rawcommit([".hgtags"], "update tags", "convert-repo", date, self.repo.changelog.tip(), hg.nullid) return hg.hex(self.repo.changelog.tip()) class convert: def __init__(self, source, dest, mapfile): self.source = source self.dest = dest self.mapfile = mapfile self.commitcache = {} self.map = {} try: for l in file(self.mapfile): sv, dv = l[:-1].split() self.map[sv] = dv except IOError: pass def walktree(self, heads): visit = heads known = {} parents = {} while visit: n = visit.pop(0) if n in known or n in self.map: continue known[n] = 1 self.commitcache[n] = self.source.getcommit(n) cp = self.commitcache[n][0] for p in cp: parents.setdefault(n, []).append(p) visit.append(p) return parents def toposort(self, parents): visit = parents.keys() seen = {} children = {} while visit: n = visit.pop(0) if n in seen: continue seen[n] = 1 pc = 0 if n in parents: for p in parents[n]: if p not in self.map: pc += 1 visit.append(p) children.setdefault(p, []).append(n) if not pc: root = n s = [] removed = {} visit = children.keys() while visit: n = visit.pop(0) if n in removed: continue dep = 0 if n in parents: for p in parents[n]: if p in self.map: continue if p not in removed: # we're still dependent visit.append(n) dep = 1 break if not dep: # all n's parents are in the list removed[n] = 1 s.append(n) if n in children: for c in children[n]: visit.insert(0, c) return s def copy(self, rev): p, a, d, t = self.commitcache[rev] files = self.source.getchanges(rev) for f,v,e in files: try: data = self.source.getfile(f, v) except IOError, inst: self.dest.delfile(f) else: self.dest.putfile(f, e, data) r = [self.map[v] for v in p] f = [f for f,v,e in files] self.map[rev] = self.dest.putcommit(f, r, a, d, t) file(self.mapfile, "a").write("%s %s\n" % (rev, self.map[rev])) def convert(self): heads = self.source.getheads() parents = self.walktree(heads) t = self.toposort(parents) t = [n for n in t if n not in self.map] num = len(t) c = None for c in t: num -= 1 desc = self.commitcache[c][3].splitlines()[0] #print num, desc self.copy(c) tags = self.source.gettags() ctags = {} for k in tags: v = tags[k] if v in self.map: ctags[k] = self.map[v] if c and ctags: nrev = self.dest.puttags(ctags) # write another hash correspondence to override the previous # one so we don't end up with extra tag heads file(self.mapfile, "a").write("%s %s\n" % (c, nrev)) gitpath, hgpath, mapfile = sys.argv[1:] if os.path.isdir(gitpath + "/.git"): gitpath += "/.git" c = convert(convert_git(gitpath), convert_mercurial(hgpath), mapfile) c.convert()