Mercurial > hg > mercurial-crew-with-dirclash
view contrib/convert-repo @ 671:efa4a7e2f322
Move hgrc documentation out to its own man page, hgrc(5).
# HG changeset patch
# User Bryan O'Sullivan <bos@serpentine.com>
# Node ID 5076cf1fd6a1b8eb410e5e03cb004ca6a52a30f9
# Parent 7369ec5d93f2ffd490a43970edd9adf8d2bbe269
Move hgrc documentation out to its own man page, hgrc(5).
The new man page expands on the existing documentation by describing
the file format and the purpose of each section and field.
author | Bryan O'Sullivan <bos@serpentine.com> |
---|---|
date | Sun, 10 Jul 2005 16:14:06 -0800 |
parents | 9d785fd7deec |
children | 695dd9a491da |
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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 from mercurial import hg, ui, util class convert_git: def __init__(self, path): self.path = path def getheads(self): h = file(self.path + "/.git/HEAD").read()[:-1] return [h] def getfile(self, name, rev): a = file(self.path + ("/.git/objects/%s/%s" % (rev[:2], rev[2:]))).read() b = zlib.decompress(a) if sha.sha(b).hexdigest() != rev: raise "bad hash" head, text = b.split('\0', 1) return text def getchanges(self, version): path = os.getcwd() os.chdir(self.path) fh = os.popen("git-diff-tree -m -r %s" % (version)) os.chdir(path) 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.getfile("", version) # 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() date = " ".join(p[-2:]) author = " ".join(p[:-2]) if author[0] == "<": author = author[1:-1] if n == "committer": p = v.split() date = " ".join(p[-2:]) committer = " ".join(p[:-2]) if committer[0] == "<": committer = committer[1:-1] message += "\ncommitter: %s %s\n" % (committer, date) if n == "parent": parents.append(v) return (parents, author, date, message) 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() h = [ hg.hex(x) for x in h ] return h def putfile(self, f, e, data): self.repo.wfile(f, "w").write(data) 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): if not parents: parents = ["0" * 40] if len(parents) < 2: parents.append("0" * 40) seen = {} pl = [] for p in parents: if p not in seen: pl.append(p) seen[p] = 1 parents = pl p2 = parents.pop(0) c = self.repo.changelog.count() 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" return hg.hex(self.repo.changelog.node(c)) class convert: def __init__(self, source, dest, mapfile): self.source = source self.dest = dest self.mapfile = mapfile self.commitcache = {} self.map = {} for l in file(self.mapfile): sv, dv = l[:-1].split() self.map[sv] = dv 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 = parents.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) num = len(t) for c in t: num -= 1 if c in self.map: continue desc = self.commitcache[c][3].splitlines()[0] print num, desc self.copy(c) gitpath, hgpath, mapfile = sys.argv[1:] c = convert(convert_git(gitpath), convert_mercurial(hgpath), mapfile) c.convert()