Mercurial > hg-stable
view mercurial/archival.py @ 50611:f30ce3558c2b
safehasattr: pass attribute name as string instead of bytes
This is a step toward replacing `util.safehasattr` usage with plain `hasattr`.
The builtin function behave poorly in Python2 but this was fixed in Python3.
These change are done one by one as they tend to have a small odd to trigger
puzzling breackage.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Thu, 02 Feb 2023 17:27:50 +0100 |
parents | 55d45d0de4e7 |
children | 3b8d92f71d92 |
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# archival.py - revision archival for mercurial # # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. import gzip import os import struct import tarfile import time import zipfile import zlib from .i18n import _ from .node import nullrev from .pycompat import open from . import ( error, formatter, match as matchmod, pycompat, scmutil, util, vfs as vfsmod, ) from .utils import stringutil stringio = util.stringio # from unzip source code: _UNX_IFREG = 0x8000 _UNX_IFLNK = 0xA000 def tidyprefix(dest, kind, prefix): """choose prefix to use for names in archive. make sure prefix is safe for consumers.""" if prefix: prefix = util.normpath(prefix) else: if not isinstance(dest, bytes): raise ValueError(b'dest must be string if no prefix') prefix = os.path.basename(dest) lower = prefix.lower() for sfx in exts.get(kind, []): if lower.endswith(sfx): prefix = prefix[: -len(sfx)] break lpfx = os.path.normpath(util.localpath(prefix)) prefix = util.pconvert(lpfx) if not prefix.endswith(b'/'): prefix += b'/' # Drop the leading '.' path component if present, so Windows can read the # zip files (issue4634) if prefix.startswith(b'./'): prefix = prefix[2:] if prefix.startswith(b'../') or os.path.isabs(lpfx) or b'/../' in prefix: raise error.Abort(_(b'archive prefix contains illegal components')) return prefix exts = { b'tar': [b'.tar'], b'tbz2': [b'.tbz2', b'.tar.bz2'], b'tgz': [b'.tgz', b'.tar.gz'], b'zip': [b'.zip'], b'txz': [b'.txz', b'.tar.xz'], } def guesskind(dest): for kind, extensions in exts.items(): if any(dest.endswith(ext) for ext in extensions): return kind return None def _rootctx(repo): # repo[0] may be hidden for rev in repo: return repo[rev] return repo[nullrev] # {tags} on ctx includes local tags and 'tip', with no current way to limit # that to global tags. Therefore, use {latesttag} as a substitute when # the distance is 0, since that will be the list of global tags on ctx. _defaultmetatemplate = br''' repo: {root} node: {ifcontains(rev, revset("wdir()"), "{p1node}{dirty}", "{node}")} branch: {branch|utf8} {ifeq(latesttagdistance, 0, join(latesttag % "tag: {tag}", "\n"), separate("\n", join(latesttag % "latesttag: {tag}", "\n"), "latesttagdistance: {latesttagdistance}", "changessincelatesttag: {changessincelatesttag}"))} '''[ 1: ] # drop leading '\n' def buildmetadata(ctx): '''build content of .hg_archival.txt''' repo = ctx.repo() opts = { b'template': repo.ui.config( b'experimental', b'archivemetatemplate', _defaultmetatemplate ) } out = util.stringio() fm = formatter.formatter(repo.ui, out, b'archive', opts) fm.startitem() fm.context(ctx=ctx) fm.data(root=_rootctx(repo).hex()) if ctx.rev() is None: dirty = b'' if ctx.dirty(missing=True): dirty = b'+' fm.data(dirty=dirty) fm.end() return out.getvalue() class tarit: """write archive to tar file or stream. can write uncompressed, or compress with gzip or bzip2.""" def __init__(self, dest, mtime, kind=b''): self.mtime = mtime self.fileobj = None def taropen(mode, name=b'', fileobj=None): if kind == b'gz': mode = mode[0:1] if not fileobj: fileobj = open(name, mode + b'b') gzfileobj = gzip.GzipFile( name, pycompat.sysstr(mode + b'b'), zlib.Z_BEST_COMPRESSION, fileobj, mtime=mtime, ) self.fileobj = gzfileobj return ( # taropen() wants Literal['a', 'r', 'w', 'x'] for the mode, # but Literal[] is only available in 3.8+ without the # typing_extensions backport. # pytype: disable=wrong-arg-types tarfile.TarFile.taropen( # pytype: disable=attribute-error name, pycompat.sysstr(mode), gzfileobj ) # pytype: enable=wrong-arg-types ) else: try: return tarfile.open( name, pycompat.sysstr(mode + kind), fileobj ) except tarfile.CompressionError as e: raise error.Abort(stringutil.forcebytestr(e)) if isinstance(dest, bytes): self.z = taropen(b'w:', name=dest) else: self.z = taropen(b'w|', fileobj=dest) def addfile(self, name, mode, islink, data): name = pycompat.fsdecode(name) i = tarfile.TarInfo(name) i.mtime = self.mtime i.size = len(data) if islink: i.type = tarfile.SYMTYPE i.mode = 0o777 i.linkname = pycompat.fsdecode(data) data = None i.size = 0 else: i.mode = mode data = stringio(data) self.z.addfile(i, data) def done(self): self.z.close() if self.fileobj: self.fileobj.close() class zipit: """write archive to zip file or stream. can write uncompressed, or compressed with deflate.""" def __init__(self, dest, mtime, compress=True): if isinstance(dest, bytes): dest = pycompat.fsdecode(dest) self.z = zipfile.ZipFile( dest, 'w', compress and zipfile.ZIP_DEFLATED or zipfile.ZIP_STORED ) # Python's zipfile module emits deprecation warnings if we try # to store files with a date before 1980. epoch = 315532800 # calendar.timegm((1980, 1, 1, 0, 0, 0, 1, 1, 0)) if mtime < epoch: mtime = epoch self.mtime = mtime self.date_time = time.gmtime(mtime)[:6] def addfile(self, name, mode, islink, data): i = zipfile.ZipInfo(pycompat.fsdecode(name), self.date_time) i.compress_type = self.z.compression # pytype: disable=attribute-error # unzip will not honor unix file modes unless file creator is # set to unix (id 3). i.create_system = 3 ftype = _UNX_IFREG if islink: mode = 0o777 ftype = _UNX_IFLNK i.external_attr = (mode | ftype) << 16 # add "extended-timestamp" extra block, because zip archives # without this will be extracted with unexpected timestamp, # if TZ is not configured as GMT i.extra += struct.pack( b'<hhBl', 0x5455, # block type: "extended-timestamp" 1 + 4, # size of this block 1, # "modification time is present" int(self.mtime), ) # last modification (UTC) self.z.writestr(i, data) def done(self): self.z.close() class fileit: '''write archive as files in directory.''' def __init__(self, name, mtime): self.basedir = name self.opener = vfsmod.vfs(self.basedir) self.mtime = mtime def addfile(self, name, mode, islink, data): if islink: self.opener.symlink(data, name) return f = self.opener(name, b"w", atomictemp=False) f.write(data) f.close() destfile = os.path.join(self.basedir, name) os.chmod(destfile, mode) if self.mtime is not None: os.utime(destfile, (self.mtime, self.mtime)) def done(self): pass archivers = { b'files': fileit, b'tar': tarit, b'tbz2': lambda name, mtime: tarit(name, mtime, b'bz2'), b'tgz': lambda name, mtime: tarit(name, mtime, b'gz'), b'txz': lambda name, mtime: tarit(name, mtime, b'xz'), b'uzip': lambda name, mtime: zipit(name, mtime, False), b'zip': zipit, } def archive( repo, dest, node, kind, decode=True, match=None, prefix=b'', mtime=None, subrepos=False, ): """create archive of repo as it was at node. dest can be name of directory, name of archive file, or file object to write archive to. kind is type of archive to create. decode tells whether to put files through decode filters from hgrc. match is a matcher to filter names of files to write to archive. prefix is name of path to put before every archive member. mtime is the modified time, in seconds, or None to use the changeset time. subrepos tells whether to include subrepos. """ if kind == b'files': if prefix: raise error.Abort(_(b'cannot give prefix when archiving to files')) else: prefix = tidyprefix(dest, kind, prefix) def write(name, mode, islink, getdata): data = getdata() if decode: data = repo.wwritedata(name, data) archiver.addfile(prefix + name, mode, islink, data) if kind not in archivers: raise error.Abort(_(b"unknown archive type '%s'") % kind) ctx = repo[node] archiver = archivers[kind](dest, mtime or ctx.date()[0]) if not match: match = scmutil.matchall(repo) if repo.ui.configbool(b"ui", b"archivemeta"): name = b'.hg_archival.txt' if match(name): write(name, 0o644, False, lambda: buildmetadata(ctx)) files = list(ctx.manifest().walk(match)) total = len(files) if total: files.sort() scmutil.prefetchfiles( repo, [(ctx.rev(), scmutil.matchfiles(repo, files))] ) progress = repo.ui.makeprogress( _(b'archiving'), unit=_(b'files'), total=total ) progress.update(0) for f in files: ff = ctx.flags(f) write(f, b'x' in ff and 0o755 or 0o644, b'l' in ff, ctx[f].data) progress.increment(item=f) progress.complete() if subrepos: for subpath in sorted(ctx.substate): sub = ctx.workingsub(subpath) submatch = matchmod.subdirmatcher(subpath, match) subprefix = prefix + subpath + b'/' total += sub.archive(archiver, subprefix, submatch, decode) if total == 0: raise error.Abort(_(b'no files match the archive pattern')) archiver.done() return total