Mercurial > hg
view hgext/convert/__init__.py @ 5556:61fdf2558c0a
convert: some tidyups, doc improvements, and test fixes
The various back end options are now documented.
The hg source can now be configured not to hand out a revision ID.
author | Bryan O'Sullivan <bos@serpentine.com> |
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date | Tue, 27 Nov 2007 09:44:09 -0800 |
parents | 2147a734dcf9 |
children | 96e16af92f2b |
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# convert.py Foreign SCM converter # # Copyright 2005-2007 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 common import NoRepo, SKIPREV, converter_source, converter_sink, mapfile from cvs import convert_cvs from darcs import darcs_source from git import convert_git from hg import mercurial_source, mercurial_sink from subversion import debugsvnlog, svn_source, svn_sink import filemap import os, shutil from mercurial import hg, ui, util, commands from mercurial.i18n import _ commands.norepo += " convert debugsvnlog" source_converters = [ ('cvs', convert_cvs), ('git', convert_git), ('svn', svn_source), ('hg', mercurial_source), ('darcs', darcs_source), ] sink_converters = [ ('hg', mercurial_sink), ('svn', svn_sink), ] def convertsource(ui, path, type, rev): exceptions = [] for name, source in source_converters: try: if not type or name == type: return source(ui, path, rev) except NoRepo, inst: exceptions.append(inst) if not ui.quiet: for inst in exceptions: ui.write(_("%s\n") % inst) raise util.Abort('%s: unknown repository type' % path) def convertsink(ui, path, type): for name, sink in sink_converters: try: if not type or name == type: return sink(ui, path) except NoRepo, inst: ui.note(_("convert: %s\n") % inst) raise util.Abort('%s: unknown repository type' % path) class converter(object): def __init__(self, ui, source, dest, revmapfile, opts): self.source = source self.dest = dest self.ui = ui self.opts = opts self.commitcache = {} self.authors = {} self.authorfile = None self.map = mapfile(ui, revmapfile) # Read first the dst author map if any authorfile = self.dest.authorfile() if authorfile and os.path.exists(authorfile): self.readauthormap(authorfile) # Extend/Override with new author map if necessary if opts.get('authors'): self.readauthormap(opts.get('authors')) self.authorfile = self.dest.authorfile() def walktree(self, heads): '''Return a mapping that identifies the uncommitted parents of every uncommitted changeset.''' visit = heads known = {} parents = {} while visit: n = visit.pop(0) if n in known or n in self.map: continue known[n] = 1 commit = self.cachecommit(n) parents[n] = [] for p in commit.parents: parents[n].append(p) visit.append(p) return parents def toposort(self, parents): '''Return an ordering such that every uncommitted changeset is preceeded by all its uncommitted ancestors.''' visit = parents.keys() seen = {} children = {} while visit: n = visit.pop(0) if n in seen: continue seen[n] = 1 # Ensure that nodes without parents are present in the 'children' # mapping. children.setdefault(n, []) for p in parents[n]: if not p in self.map: visit.append(p) children.setdefault(p, []).append(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 if n not in self.map: s.append(n) if n in children: for c in children[n]: visit.insert(0, c) if self.opts.get('datesort'): depth = {} for n in s: depth[n] = 0 pl = [p for p in self.commitcache[n].parents if p not in self.map] if pl: depth[n] = max([depth[p] for p in pl]) + 1 s = [(depth[n], self.commitcache[n].date, n) for n in s] s.sort() s = [e[2] for e in s] return s def writeauthormap(self): authorfile = self.authorfile if authorfile: self.ui.status('Writing author map file %s\n' % authorfile) ofile = open(authorfile, 'w+') for author in self.authors: ofile.write("%s=%s\n" % (author, self.authors[author])) ofile.close() def readauthormap(self, authorfile): afile = open(authorfile, 'r') for line in afile: try: srcauthor = line.split('=')[0].strip() dstauthor = line.split('=')[1].strip() if srcauthor in self.authors and dstauthor != self.authors[srcauthor]: self.ui.status( 'Overriding mapping for author %s, was %s, will be %s\n' % (srcauthor, self.authors[srcauthor], dstauthor)) else: self.ui.debug('Mapping author %s to %s\n' % (srcauthor, dstauthor)) self.authors[srcauthor] = dstauthor except IndexError: self.ui.warn( 'Ignoring bad line in author file map %s: %s\n' % (authorfile, line)) afile.close() def cachecommit(self, rev): commit = self.source.getcommit(rev) commit.author = self.authors.get(commit.author, commit.author) self.commitcache[rev] = commit return commit def copy(self, rev): commit = self.commitcache[rev] do_copies = hasattr(self.dest, 'copyfile') filenames = [] changes = self.source.getchanges(rev) if isinstance(changes, basestring): if changes == SKIPREV: dest = SKIPREV else: dest = self.map[changes] self.map[rev] = dest return files, copies = changes parents = [self.map[r] for r in commit.parents] if commit.parents: prev = commit.parents[0] if prev not in self.commitcache: self.cachecommit(prev) pbranch = self.commitcache[prev].branch else: pbranch = None self.dest.setbranch(commit.branch, pbranch, parents) for f, v in files: filenames.append(f) try: data = self.source.getfile(f, v) except IOError, inst: self.dest.delfile(f) else: e = self.source.getmode(f, v) self.dest.putfile(f, e, data) if do_copies: if f in copies: copyf = copies[f] # Merely marks that a copy happened. self.dest.copyfile(copyf, f) newnode = self.dest.putcommit(filenames, parents, commit) self.source.converted(rev, newnode) self.map[rev] = newnode def convert(self): try: self.source.before() self.dest.before() self.source.setrevmap(self.map) self.ui.status("scanning source...\n") heads = self.source.getheads() parents = self.walktree(heads) self.ui.status("sorting...\n") t = self.toposort(parents) num = len(t) c = None self.ui.status("converting...\n") for c in t: num -= 1 desc = self.commitcache[c].desc if "\n" in desc: desc = desc.splitlines()[0] self.ui.status("%d %s\n" % (num, desc)) self.copy(c) tags = self.source.gettags() ctags = {} for k in tags: v = tags[k] if self.map.get(v, SKIPREV) != SKIPREV: 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 if nrev: self.map[c] = nrev self.writeauthormap() finally: self.cleanup() def cleanup(self): try: self.dest.after() finally: self.source.after() self.map.close() def convert(ui, src, dest=None, revmapfile=None, **opts): """Convert a foreign SCM repository to a Mercurial one. Accepted source formats: - Mercurial - CVS - Darcs - git - Subversion Accepted destination formats: - Mercurial - Subversion (history on branches is not preserved) If no revision is given, all revisions will be converted. Otherwise, convert will only import up to the named revision (given in a format understood by the source). If no destination directory name is specified, it defaults to the basename of the source with '-hg' appended. If the destination repository doesn't exist, it will be created. If <MAPFILE> isn't given, it will be put in a default location (<dest>/.hg/shamap by default). The <MAPFILE> is a simple text file that maps each source commit ID to the destination ID for that revision, like so: <source ID> <destination ID> If the file doesn't exist, it's automatically created. It's updated on each commit copied, so convert-repo can be interrupted and can be run repeatedly to copy new commits. The [username mapping] file is a simple text file that maps each source commit author to a destination commit author. It is handy for source SCMs that use unix logins to identify authors (eg: CVS). One line per author mapping and the line format is: srcauthor=whatever string you want The filemap is a file that allows filtering and remapping of files and directories. Comment lines start with '#'. Each line can contain one of the following directives: include path/to/file exclude path/to/file rename from/file to/file The 'include' directive causes a file, or all files under a directory, to be included in the destination repository, and the exclusion of all other files and dirs not explicitely included. The 'exclude' directive causes files or directories to be omitted. The 'rename' directive renames a file or directory. To rename from a subdirectory into the root of the repository, use '.' as the path to rename to. Back end options: --config convert.hg.clonebranches=False (boolean) hg target: XXX not documented --config convert.hg.saverev=True (boolean) hg source: allow target to preserve source revision ID --config convert.hg.tagsbranch=default (branch name) hg target: XXX not documented --config convert.hg.usebranchnames=True (boolean) hg target: preserve branch names --config convert.svn.branches=branches (directory name) svn source: specify the directory containing branches --config convert.svn.tags=tags (directory name) svn source: specify the directory containing tags --config convert.svn.trunk=trunk (directory name) svn source: specify the name of the trunk branch """ util._encoding = 'UTF-8' if not dest: dest = hg.defaultdest(src) + "-hg" ui.status("assuming destination %s\n" % dest) destc = convertsink(ui, dest, opts.get('dest_type')) try: srcc = convertsource(ui, src, opts.get('source_type'), opts.get('rev')) except Exception: for path in destc.created: shutil.rmtree(path, True) raise fmap = opts.get('filemap') if fmap: srcc = filemap.filemap_source(ui, srcc, fmap) destc.setfilemapmode(True) if not revmapfile: try: revmapfile = destc.revmapfile() except: revmapfile = os.path.join(destc, "map") c = converter(ui, srcc, destc, revmapfile, opts) c.convert() cmdtable = { "convert": (convert, [('A', 'authors', '', 'username mapping filename'), ('d', 'dest-type', '', 'destination repository type'), ('', 'filemap', '', 'remap file names using contents of file'), ('r', 'rev', '', 'import up to target revision REV'), ('s', 'source-type', '', 'source repository type'), ('', 'datesort', None, 'try to sort changesets by date')], 'hg convert [OPTION]... SOURCE [DEST [MAPFILE]]'), "debugsvnlog": (debugsvnlog, [], 'hg debugsvnlog'), }