Mercurial > hg
view hgext/fastexport.py @ 50049:088ee6adfb09
largefiles: rely on main scoping for writing dirstate in `mergeupdate`
Yeah, cleaner code.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Sun, 05 Feb 2023 12:05:23 +0100 |
parents | 6000f5b25c9b |
children | dd42156b6441 |
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# Copyright 2020 Joerg Sonnenberger <joerg@bec.de> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. """export repositories as git fast-import stream""" # The format specification for fast-import streams can be found at # https://git-scm.com/docs/git-fast-import#_input_format import re from mercurial.i18n import _ from mercurial.node import hex, nullrev from mercurial.utils import stringutil from mercurial import ( error, logcmdutil, pycompat, registrar, scmutil, ) from .convert import convcmd # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should # be specifying the version(s) of Mercurial they are tested with, or # leave the attribute unspecified. testedwith = b"ships-with-hg-core" cmdtable = {} command = registrar.command(cmdtable) GIT_PERSON_PROHIBITED = re.compile(b'[<>\n"]') GIT_EMAIL_PROHIBITED = re.compile(b"[<> \n]") def convert_to_git_user(authormap, user, rev): mapped_user = authormap.get(user, user) user_person = stringutil.person(mapped_user) user_email = stringutil.email(mapped_user) if GIT_EMAIL_PROHIBITED.match(user_email) or GIT_PERSON_PROHIBITED.match( user_person ): raise error.Abort( _(b"Unable to parse user into person and email for revision %s") % rev ) if user_person: return b'"' + user_person + b'" <' + user_email + b'>' else: return b"<" + user_email + b">" def convert_to_git_date(date): timestamp, utcoff = date tzsign = b"+" if utcoff <= 0 else b"-" if utcoff % 60 != 0: raise error.Abort( _(b"UTC offset in %b is not an integer number of seconds") % (date,) ) utcoff = abs(utcoff) // 60 tzh = utcoff // 60 tzmin = utcoff % 60 return b"%d " % int(timestamp) + tzsign + b"%02d%02d" % (tzh, tzmin) def convert_to_git_ref(branch): # XXX filter/map depending on git restrictions return b"refs/heads/" + branch def write_data(buf, data, skip_newline): buf.append(b"data %d\n" % len(data)) buf.append(data) if not skip_newline or data[-1:] != b"\n": buf.append(b"\n") def export_commit(ui, repo, rev, marks, authormap): ctx = repo[rev] revid = ctx.hex() if revid in marks: ui.debug(b"warning: revision %s already exported, skipped\n" % revid) return parents = [p for p in ctx.parents() if p.rev() != nullrev] for p in parents: if p.hex() not in marks: ui.warn( _(b"warning: parent %s of %s has not been exported, skipped\n") % (p, revid) ) return # For all files modified by the commit, check if they have already # been exported and otherwise dump the blob with the new mark. for fname in ctx.files(): if fname not in ctx: continue filectx = ctx.filectx(fname) filerev = hex(filectx.filenode()) if filerev not in marks: mark = len(marks) + 1 marks[filerev] = mark data = filectx.data() buf = [b"blob\n", b"mark :%d\n" % mark] write_data(buf, data, False) ui.write(*buf, keepprogressbar=True) del buf # Assign a mark for the current revision for references by # latter merge commits. mark = len(marks) + 1 marks[revid] = mark ref = convert_to_git_ref(ctx.branch()) buf = [ b"commit %s\n" % ref, b"mark :%d\n" % mark, b"committer %s %s\n" % ( convert_to_git_user(authormap, ctx.user(), revid), convert_to_git_date(ctx.date()), ), ] write_data(buf, ctx.description(), True) if parents: buf.append(b"from :%d\n" % marks[parents[0].hex()]) if len(parents) == 2: buf.append(b"merge :%d\n" % marks[parents[1].hex()]) p0ctx = repo[parents[0]] files = ctx.manifest().diff(p0ctx.manifest()) else: files = ctx.files() filebuf = [] for fname in files: if fname not in ctx: filebuf.append((fname, b"D %s\n" % fname)) else: filectx = ctx.filectx(fname) filerev = filectx.filenode() fileperm = b"755" if filectx.isexec() else b"644" changed = b"M %s :%d %s\n" % (fileperm, marks[hex(filerev)], fname) filebuf.append((fname, changed)) filebuf.sort() buf.extend(changed for (fname, changed) in filebuf) del filebuf buf.append(b"\n") ui.write(*buf, keepprogressbar=True) del buf isrev = re.compile(b"^[0-9a-f]{40}$") @command( b"fastexport", [ (b"r", b"rev", [], _(b"revisions to export"), _(b"REV")), (b"i", b"import-marks", b"", _(b"old marks file to read"), _(b"FILE")), (b"e", b"export-marks", b"", _(b"new marks file to write"), _(b"FILE")), ( b"A", b"authormap", b"", _(b"remap usernames using this file"), _(b"FILE"), ), ], _(b"[OPTION]... [REV]..."), helpcategory=command.CATEGORY_IMPORT_EXPORT, ) def fastexport(ui, repo, *revs, **opts): """export repository as git fast-import stream This command lets you dump a repository as a human-readable text stream. It can be piped into corresponding import routines like "git fast-import". Incremental dumps can be created by using marks files. """ opts = pycompat.byteskwargs(opts) revs += tuple(opts.get(b"rev", [])) if not revs: revs = scmutil.revrange(repo, [b":"]) else: revs = logcmdutil.revrange(repo, revs) if not revs: raise error.Abort(_(b"no revisions matched")) authorfile = opts.get(b"authormap") if authorfile: authormap = convcmd.readauthormap(ui, authorfile) else: authormap = {} import_marks = opts.get(b"import_marks") marks = {} if import_marks: with open(import_marks, "rb") as import_marks_file: for line in import_marks_file: line = line.strip() if not isrev.match(line) or line in marks: raise error.Abort(_(b"Corrupted marks file")) marks[line] = len(marks) + 1 revs.sort() with ui.makeprogress( _(b"exporting"), unit=_(b"revisions"), total=len(revs) ) as progress: for rev in revs: export_commit(ui, repo, rev, marks, authormap) progress.increment() export_marks = opts.get(b"export_marks") if export_marks: with open(export_marks, "wb") as export_marks_file: output_marks = [None] * len(marks) for k, v in marks.items(): output_marks[v - 1] = k for k in output_marks: export_marks_file.write(k + b"\n")