Mercurial > hg > mercurial-crew-with-dirclash
view hgext/hgk.py @ 5192:33015dac5df5
convert: fix mercurial_sink.putcommit
Changeset 4ebc8693ce72 added some code to putcommit to avoid creating a
revision that touches no files, but this can break regular conversions
from some repositories:
- conceptually, since we're converting a repo, we should try to make
the new hg repo as similar as possible to the original repo - we
should create a new changeset, even if the original revision didn't
touch any files (maybe the commit message had some important bit);
- even if a "regular" revision that doesn't touch any file may seem
weird (and maybe even broken), it's completely legitimate for a merge
revision to not touch any file, and, if we just skip it, the
converted repo will end up with wrong history and possibly an extra
head.
As an example, say the crew and main hg repos are sync'ed. Somebody
sends an important patch to the mailing list. Matt quickly applies
and pushes it. But at the same time somebody also applies it to crew
and pushes it. Suppose the commit message ended up being a bit
different (say, there was a typo and somebody didn't fix it) or that
the date ended up being different (because of different patch-applying
scripts): the changeset hashes will be different, but the manifests
will be the same.
Since both changesets were pushed to public repos, it's hard to recall
them. If both are merged, the manifest from the resulting merge
revision will have the exact same contents as its parents - i.e. the
merge revision really doesn't touch any file at all.
To keep the file filtering stuff "working", the generic code was changed
to skip empty revisions if we're filtering the repo, fixing a bug in the
process (we want parents[0] instead of tip).
author | Alexis S. L. Carvalho <alexis@cecm.usp.br> |
---|---|
date | Fri, 17 Aug 2007 20:18:05 -0300 |
parents | eadfaa9ec487 |
children | c2ad1890fc53 |
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# Minimal support for git commands on an hg repository # # Copyright 2005, 2006 Chris Mason <mason@suse.com> # # This software may be used and distributed according to the terms # of the GNU General Public License, incorporated herein by reference. import sys, os from mercurial import hg, fancyopts, commands, ui, util, patch, revlog def difftree(ui, repo, node1=None, node2=None, *files, **opts): """diff trees from two commits""" def __difftree(repo, node1, node2, files=[]): assert node2 is not None mmap = repo.changectx(node1).manifest() mmap2 = repo.changectx(node2).manifest() status = repo.status(node1, node2, files=files)[:5] modified, added, removed, deleted, unknown = status empty = hg.short(hg.nullid) for f in modified: # TODO get file permissions print ":100664 100664 %s %s M\t%s\t%s" % (hg.short(mmap[f]), hg.short(mmap2[f]), f, f) for f in added: print ":000000 100664 %s %s N\t%s\t%s" % (empty, hg.short(mmap2[f]), f, f) for f in removed: print ":100664 000000 %s %s D\t%s\t%s" % (hg.short(mmap[f]), empty, f, f) ## while True: if opts['stdin']: try: line = raw_input().split(' ') node1 = line[0] if len(line) > 1: node2 = line[1] else: node2 = None except EOFError: break node1 = repo.lookup(node1) if node2: node2 = repo.lookup(node2) else: node2 = node1 node1 = repo.changelog.parents(node1)[0] if opts['patch']: if opts['pretty']: catcommit(repo, node2, "") patch.diff(repo, node1, node2, files=files, opts=patch.diffopts(ui, {'git': True})) else: __difftree(repo, node1, node2, files=files) if not opts['stdin']: break def catcommit(repo, n, prefix, ctx=None): nlprefix = '\n' + prefix; if ctx is None: ctx = repo.changectx(n) (p1, p2) = ctx.parents() print "tree %s" % (hg.short(ctx.changeset()[0])) # use ctx.node() instead ?? if p1: print "parent %s" % (hg.short(p1.node())) if p2: print "parent %s" % (hg.short(p2.node())) date = ctx.date() description = ctx.description().replace("\0", "") lines = description.splitlines() if lines and lines[-1].startswith('committer:'): committer = lines[-1].split(': ')[1].rstrip() else: committer = ctx.user() print "author %s %s %s" % (ctx.user(), int(date[0]), date[1]) print "committer %s %s %s" % (committer, int(date[0]), date[1]) print "revision %d" % ctx.rev() print "" if prefix != "": print "%s%s" % (prefix, description.replace('\n', nlprefix).strip()) else: print description if prefix: sys.stdout.write('\0') def base(ui, repo, node1, node2): """Output common ancestor information""" node1 = repo.lookup(node1) node2 = repo.lookup(node2) n = repo.changelog.ancestor(node1, node2) print hg.short(n) def catfile(ui, repo, type=None, r=None, **opts): """cat a specific revision""" # in stdin mode, every line except the commit is prefixed with two # spaces. This way the our caller can find the commit without magic # strings # prefix = "" if opts['stdin']: try: (type, r) = raw_input().split(' '); prefix = " " except EOFError: return else: if not type or not r: ui.warn("cat-file: type or revision not supplied\n") commands.help_(ui, 'cat-file') while r: if type != "commit": sys.stderr.write("aborting hg cat-file only understands commits\n") sys.exit(1); n = repo.lookup(r) catcommit(repo, n, prefix) if opts['stdin']: try: (type, r) = raw_input().split(' '); except EOFError: break else: break # git rev-tree is a confusing thing. You can supply a number of # commit sha1s on the command line, and it walks the commit history # telling you which commits are reachable from the supplied ones via # a bitmask based on arg position. # you can specify a commit to stop at by starting the sha1 with ^ def revtree(args, repo, full="tree", maxnr=0, parents=False): def chlogwalk(): count = repo.changelog.count() i = count l = [0] * 100 chunk = 100 while True: if chunk > i: chunk = i i = 0 else: i -= chunk for x in xrange(0, chunk): if i + x >= count: l[chunk - x:] = [0] * (chunk - x) break if full != None: l[x] = repo.changectx(i + x) l[x].changeset() # force reading else: l[x] = 1 for x in xrange(chunk-1, -1, -1): if l[x] != 0: yield (i + x, full != None and l[x] or None) if i == 0: break # calculate and return the reachability bitmask for sha def is_reachable(ar, reachable, sha): if len(ar) == 0: return 1 mask = 0 for i in xrange(len(ar)): if sha in reachable[i]: mask |= 1 << i return mask reachable = [] stop_sha1 = [] want_sha1 = [] count = 0 # figure out which commits they are asking for and which ones they # want us to stop on for i in xrange(len(args)): if args[i].startswith('^'): s = repo.lookup(args[i][1:]) stop_sha1.append(s) want_sha1.append(s) elif args[i] != 'HEAD': want_sha1.append(repo.lookup(args[i])) # calculate the graph for the supplied commits for i in xrange(len(want_sha1)): reachable.append({}); n = want_sha1[i]; visit = [n]; reachable[i][n] = 1 while visit: n = visit.pop(0) if n in stop_sha1: continue for p in repo.changelog.parents(n): if p not in reachable[i]: reachable[i][p] = 1 visit.append(p) if p in stop_sha1: continue # walk the repository looking for commits that are in our # reachability graph for i, ctx in chlogwalk(): n = repo.changelog.node(i) mask = is_reachable(want_sha1, reachable, n) if mask: parentstr = "" if parents: pp = repo.changelog.parents(n) if pp[0] != hg.nullid: parentstr += " " + hg.short(pp[0]) if pp[1] != hg.nullid: parentstr += " " + hg.short(pp[1]) if not full: print hg.short(n) + parentstr elif full == "commit": print hg.short(n) + parentstr catcommit(repo, n, ' ', ctx) else: (p1, p2) = repo.changelog.parents(n) (h, h1, h2) = map(hg.short, (n, p1, p2)) (i1, i2) = map(repo.changelog.rev, (p1, p2)) date = ctx.date()[0] print "%s %s:%s" % (date, h, mask), mask = is_reachable(want_sha1, reachable, p1) if i1 != hg.nullrev and mask > 0: print "%s:%s " % (h1, mask), mask = is_reachable(want_sha1, reachable, p2) if i2 != hg.nullrev and mask > 0: print "%s:%s " % (h2, mask), print "" if maxnr and count >= maxnr: break count += 1 def revparse(ui, repo, *revs, **opts): """Parse given revisions""" def revstr(rev): if rev == 'HEAD': rev = 'tip' return revlog.hex(repo.lookup(rev)) for r in revs: revrange = r.split(':', 1) ui.write('%s\n' % revstr(revrange[0])) if len(revrange) == 2: ui.write('^%s\n' % revstr(revrange[1])) # git rev-list tries to order things by date, and has the ability to stop # at a given commit without walking the whole repo. TODO add the stop # parameter def revlist(ui, repo, *revs, **opts): """print revisions""" if opts['header']: full = "commit" else: full = None copy = [x for x in revs] revtree(copy, repo, full, opts['max_count'], opts['parents']) def view(ui, repo, *etc, **opts): "start interactive history viewer" os.chdir(repo.root) optstr = ' '.join(['--%s %s' % (k, v) for k, v in opts.iteritems() if v]) cmd = ui.config("hgk", "path", "hgk") + " %s %s" % (optstr, " ".join(etc)) ui.debug("running %s\n" % cmd) util.system(cmd) cmdtable = { "^view": (view, [('l', 'limit', '', 'limit number of changes displayed')], 'hg view [-l LIMIT] [REVRANGE]'), "debug-diff-tree": (difftree, [('p', 'patch', None, 'generate patch'), ('r', 'recursive', None, 'recursive'), ('P', 'pretty', None, 'pretty'), ('s', 'stdin', None, 'stdin'), ('C', 'copy', None, 'detect copies'), ('S', 'search', "", 'search')], 'hg git-diff-tree [OPTION]... NODE1 NODE2 [FILE]...'), "debug-cat-file": (catfile, [('s', 'stdin', None, 'stdin')], 'hg debug-cat-file [OPTION]... TYPE FILE'), "debug-merge-base": (base, [], 'hg debug-merge-base node node'), "debug-rev-parse": (revparse, [('', 'default', '', 'ignored')], 'hg debug-rev-parse REV'), "debug-rev-list": (revlist, [('H', 'header', None, 'header'), ('t', 'topo-order', None, 'topo-order'), ('p', 'parents', None, 'parents'), ('n', 'max-count', 0, 'max-count')], 'hg debug-rev-list [options] revs'), }