mercurial/archival.py
author Augie Fackler <augie@google.com>
Wed, 02 Mar 2022 10:06:37 -0500
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setup: remove ssl check that only matters on 2.7 Differential Revision: https://phab.mercurial-scm.org/D12269
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# archival.py - revision archival for mercurial
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#
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# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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import gzip
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import os
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import struct
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import tarfile
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import time
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import zipfile
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import zlib
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from .i18n import _
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from .node import nullrev
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from .pycompat import open
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from . import (
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    error,
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    formatter,
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    match as matchmod,
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    pycompat,
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    scmutil,
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    util,
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    vfs as vfsmod,
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)
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from .utils import stringutil
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stringio = util.stringio
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# from unzip source code:
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_UNX_IFREG = 0x8000
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_UNX_IFLNK = 0xA000
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def tidyprefix(dest, kind, prefix):
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    """choose prefix to use for names in archive.  make sure prefix is
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    safe for consumers."""
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    if prefix:
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        prefix = util.normpath(prefix)
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    else:
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        if not isinstance(dest, bytes):
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            raise ValueError(b'dest must be string if no prefix')
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        prefix = os.path.basename(dest)
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        lower = prefix.lower()
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        for sfx in exts.get(kind, []):
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            if lower.endswith(sfx):
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                prefix = prefix[: -len(sfx)]
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                break
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    lpfx = os.path.normpath(util.localpath(prefix))
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    prefix = util.pconvert(lpfx)
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    if not prefix.endswith(b'/'):
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        prefix += b'/'
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    # Drop the leading '.' path component if present, so Windows can read the
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    # zip files (issue4634)
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    if prefix.startswith(b'./'):
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        prefix = prefix[2:]
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    if prefix.startswith(b'../') or os.path.isabs(lpfx) or b'/../' in prefix:
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        raise error.Abort(_(b'archive prefix contains illegal components'))
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    return prefix
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exts = {
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    b'tar': [b'.tar'],
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    b'tbz2': [b'.tbz2', b'.tar.bz2'],
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    b'tgz': [b'.tgz', b'.tar.gz'],
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    b'zip': [b'.zip'],
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    b'txz': [b'.txz', b'.tar.xz'],
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}
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def guesskind(dest):
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    for kind, extensions in pycompat.iteritems(exts):
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        if any(dest.endswith(ext) for ext in extensions):
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            return kind
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    return None
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def _rootctx(repo):
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    # repo[0] may be hidden
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    for rev in repo:
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        return repo[rev]
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    return repo[nullrev]
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# {tags} on ctx includes local tags and 'tip', with no current way to limit
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# that to global tags.  Therefore, use {latesttag} as a substitute when
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# the distance is 0, since that will be the list of global tags on ctx.
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_defaultmetatemplate = br'''
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repo: {root}
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node: {ifcontains(rev, revset("wdir()"), "{p1node}{dirty}", "{node}")}
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branch: {branch|utf8}
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{ifeq(latesttagdistance, 0, join(latesttag % "tag: {tag}", "\n"),
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      separate("\n",
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               join(latesttag % "latesttag: {tag}", "\n"),
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               "latesttagdistance: {latesttagdistance}",
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               "changessincelatesttag: {changessincelatesttag}"))}
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'''[
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    1:
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]  # drop leading '\n'
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def buildmetadata(ctx):
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    '''build content of .hg_archival.txt'''
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    repo = ctx.repo()
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    opts = {
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        b'template': repo.ui.config(
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            b'experimental', b'archivemetatemplate', _defaultmetatemplate
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        )
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    }
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    out = util.stringio()
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    fm = formatter.formatter(repo.ui, out, b'archive', opts)
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    fm.startitem()
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    fm.context(ctx=ctx)
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    fm.data(root=_rootctx(repo).hex())
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    if ctx.rev() is None:
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        dirty = b''
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        if ctx.dirty(missing=True):
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            dirty = b'+'
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        fm.data(dirty=dirty)
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    fm.end()
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    return out.getvalue()
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class tarit(object):
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    """write archive to tar file or stream.  can write uncompressed,
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    or compress with gzip or bzip2."""
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    if pycompat.ispy3:
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        GzipFileWithTime = gzip.GzipFile  # camelcase-required
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    else:
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        class GzipFileWithTime(gzip.GzipFile):
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            def __init__(self, *args, **kw):
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                timestamp = None
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                if 'mtime' in kw:
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                    timestamp = kw.pop('mtime')
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                if timestamp is None:
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                    self.timestamp = time.time()
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                else:
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                    self.timestamp = timestamp
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                gzip.GzipFile.__init__(self, *args, **kw)
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            def _write_gzip_header(self):
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                self.fileobj.write(b'\037\213')  # magic header
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                self.fileobj.write(b'\010')  # compression method
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                fname = self.name
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                if fname and fname.endswith(b'.gz'):
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                    fname = fname[:-3]
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                flags = 0
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                if fname:
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                    flags = gzip.FNAME  # pytype: disable=module-attr
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                self.fileobj.write(pycompat.bytechr(flags))
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                gzip.write32u(  # pytype: disable=module-attr
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                    self.fileobj, int(self.timestamp)
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                )
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                self.fileobj.write(b'\002')
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                self.fileobj.write(b'\377')
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                if fname:
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                    self.fileobj.write(fname + b'\000')
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    def __init__(self, dest, mtime, kind=b''):
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        self.mtime = mtime
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        self.fileobj = None
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        def taropen(mode, name=b'', fileobj=None):
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            if kind == b'gz':
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                mode = mode[0:1]
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                if not fileobj:
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                    fileobj = open(name, mode + b'b')
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                gzfileobj = self.GzipFileWithTime(
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                    name,
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                    pycompat.sysstr(mode + b'b'),
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                    zlib.Z_BEST_COMPRESSION,
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                    fileobj,
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                    mtime=mtime,
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                )
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                self.fileobj = gzfileobj
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                return (
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                    tarfile.TarFile.taropen(  # pytype: disable=attribute-error
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                        name, pycompat.sysstr(mode), gzfileobj
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                    )
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                )
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            else:
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                try:
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                    return tarfile.open(
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                        name, pycompat.sysstr(mode + kind), fileobj
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                    )
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                except tarfile.CompressionError as e:
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                    raise error.Abort(stringutil.forcebytestr(e))
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        if isinstance(dest, bytes):
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            self.z = taropen(b'w:', name=dest)
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        else:
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            self.z = taropen(b'w|', fileobj=dest)
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    def addfile(self, name, mode, islink, data):
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        name = pycompat.fsdecode(name)
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        i = tarfile.TarInfo(name)
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        i.mtime = self.mtime
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        i.size = len(data)
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        if islink:
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            i.type = tarfile.SYMTYPE
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            i.mode = 0o777
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            i.linkname = pycompat.fsdecode(data)
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            data = None
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            i.size = 0
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        else:
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            i.mode = mode
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            data = stringio(data)
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        self.z.addfile(i, data)
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    def done(self):
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        self.z.close()
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        if self.fileobj:
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            self.fileobj.close()
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class zipit(object):
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    """write archive to zip file or stream.  can write uncompressed,
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    or compressed with deflate."""
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    def __init__(self, dest, mtime, compress=True):
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        if isinstance(dest, bytes):
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            dest = pycompat.fsdecode(dest)
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        self.z = zipfile.ZipFile(
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            dest, 'w', compress and zipfile.ZIP_DEFLATED or zipfile.ZIP_STORED
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        )
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        # Python's zipfile module emits deprecation warnings if we try
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        # to store files with a date before 1980.
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        epoch = 315532800  # calendar.timegm((1980, 1, 1, 0, 0, 0, 1, 1, 0))
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        if mtime < epoch:
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            mtime = epoch
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        self.mtime = mtime
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        self.date_time = time.gmtime(mtime)[:6]
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    def addfile(self, name, mode, islink, data):
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        i = zipfile.ZipInfo(pycompat.fsdecode(name), self.date_time)
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        i.compress_type = self.z.compression  # pytype: disable=attribute-error
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        # unzip will not honor unix file modes unless file creator is
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        # set to unix (id 3).
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        i.create_system = 3
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        ftype = _UNX_IFREG
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        if islink:
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            mode = 0o777
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            ftype = _UNX_IFLNK
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        i.external_attr = (mode | ftype) << 16
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        # add "extended-timestamp" extra block, because zip archives
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        # without this will be extracted with unexpected timestamp,
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        # if TZ is not configured as GMT
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        i.extra += struct.pack(
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            b'<hhBl',
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            0x5455,  # block type: "extended-timestamp"
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            1 + 4,  # size of this block
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            1,  # "modification time is present"
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            int(self.mtime),
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        )  # last modification (UTC)
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        self.z.writestr(i, data)
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    def done(self):
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        self.z.close()
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class fileit(object):
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    '''write archive as files in directory.'''
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    def __init__(self, name, mtime):
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        self.basedir = name
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        self.opener = vfsmod.vfs(self.basedir)
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        self.mtime = mtime
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    def addfile(self, name, mode, islink, data):
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        if islink:
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            self.opener.symlink(data, name)
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            return
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        f = self.opener(name, b"w", atomictemp=False)
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        f.write(data)
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        f.close()
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        destfile = os.path.join(self.basedir, name)
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        os.chmod(destfile, mode)
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        if self.mtime is not None:
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            os.utime(destfile, (self.mtime, self.mtime))
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    def done(self):
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        pass
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archivers = {
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    b'files': fileit,
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    b'tar': tarit,
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    b'tbz2': lambda name, mtime: tarit(name, mtime, b'bz2'),
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    b'tgz': lambda name, mtime: tarit(name, mtime, b'gz'),
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    b'txz': lambda name, mtime: tarit(name, mtime, b'xz'),
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    b'uzip': lambda name, mtime: zipit(name, mtime, False),
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    b'zip': zipit,
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}
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def archive(
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    repo,
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    dest,
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    node,
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    kind,
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    decode=True,
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    match=None,
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    prefix=b'',
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    mtime=None,
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    subrepos=False,
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):
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   323
    """create archive of repo as it was at node.
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    dest can be name of directory, name of archive file, or file
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    object to write archive to.
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   327
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   328
    kind is type of archive to create.
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   329
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    decode tells whether to put files through decode filters from
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   331
    hgrc.
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   332
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   333
    match is a matcher to filter names of files to write to archive.
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   335
    prefix is name of path to put before every archive member.
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   337
    mtime is the modified time, in seconds, or None to use the changeset time.
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    subrepos tells whether to include subrepos.
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   340
    """
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    if kind == b'txz' and not pycompat.ispy3:
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        raise error.Abort(_(b'xz compression is only available in Python 3'))
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   344
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   345
    if kind == b'files':
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   346
        if prefix:
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   347
            raise error.Abort(_(b'cannot give prefix when archiving to files'))
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   348
    else:
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   349
        prefix = tidyprefix(dest, kind, prefix)
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   350
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   351
    def write(name, mode, islink, getdata):
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   352
        data = getdata()
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   353
        if decode:
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   354
            data = repo.wwritedata(name, data)
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   355
        archiver.addfile(prefix + name, mode, islink, data)
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   356
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b70a530bdb93 cleanly abort on unknown archive type (issue966)
Dirkjan Ochtman <dirkjan@ochtman.nl>
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   357
    if kind not in archivers:
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   358
        raise error.Abort(_(b"unknown archive type '%s'") % kind)
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   359
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   360
    ctx = repo[node]
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   361
    archiver = archivers[kind](dest, mtime or ctx.date()[0])
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   362
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   363
    if not match:
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   364
        match = scmutil.matchall(repo)
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   365
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    if repo.ui.configbool(b"ui", b"archivemeta"):
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   367
        name = b'.hg_archival.txt'
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   368
        if match(name):
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   369
            write(name, 0o644, False, lambda: buildmetadata(ctx))
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   370
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   371
    files = list(ctx.manifest().walk(match))
16919
51932c835b74 archive: make progress only show files that are actually archived
Thomas Arendsen Hein <thomas@intevation.de>
parents: 15057
diff changeset
   372
    total = len(files)
18967
88d1b59f6906 archive: raise error.Abort if the file pattern matches no files
Angel Ezquerra <angel.ezquerra@gmail.com>
parents: 18364
diff changeset
   373
    if total:
88d1b59f6906 archive: raise error.Abort if the file pattern matches no files
Angel Ezquerra <angel.ezquerra@gmail.com>
parents: 18364
diff changeset
   374
        files.sort()
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42940
diff changeset
   375
        scmutil.prefetchfiles(
45072
a56ba57c837d scmutil: allowing different files to be prefetched per revision
Rodrigo Damazio Bovendorp <rdamazio@google.com>
parents: 44577
diff changeset
   376
            repo, [(ctx.rev(), scmutil.matchfiles(repo, files))]
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42940
diff changeset
   377
        )
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42940
diff changeset
   378
        progress = repo.ui.makeprogress(
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   379
            _(b'archiving'), unit=_(b'files'), total=total
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42940
diff changeset
   380
        )
38381
1a2ff11e8a88 archival: use progress helper
Martin von Zweigbergk <martinvonz@google.com>
parents: 37762
diff changeset
   381
        progress.update(0)
1a2ff11e8a88 archival: use progress helper
Martin von Zweigbergk <martinvonz@google.com>
parents: 37762
diff changeset
   382
        for f in files:
18967
88d1b59f6906 archive: raise error.Abort if the file pattern matches no files
Angel Ezquerra <angel.ezquerra@gmail.com>
parents: 18364
diff changeset
   383
            ff = ctx.flags(f)
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   384
            write(f, b'x' in ff and 0o755 or 0o644, b'l' in ff, ctx[f].data)
38381
1a2ff11e8a88 archival: use progress helper
Martin von Zweigbergk <martinvonz@google.com>
parents: 37762
diff changeset
   385
            progress.increment(item=f)
1a2ff11e8a88 archival: use progress helper
Martin von Zweigbergk <martinvonz@google.com>
parents: 37762
diff changeset
   386
        progress.complete()
12323
f00953d9533c subrepo: add support for 'hg archive'
Martin Geisler <mg@aragost.com>
parents: 12321
diff changeset
   387
f00953d9533c subrepo: add support for 'hg archive'
Martin Geisler <mg@aragost.com>
parents: 12321
diff changeset
   388
    if subrepos:
18364
6252b4f1c4b4 subrepos: process subrepos in sorted order
Mads Kiilerich <mads@kiilerich.com>
parents: 18344
diff changeset
   389
        for subpath in sorted(ctx.substate):
25601
3ec8351fa6ed archive: support 'wdir()'
Matt Harbison <matt_harbison@yahoo.com>
parents: 25149
diff changeset
   390
            sub = ctx.workingsub(subpath)
40407
3d76a8e627a6 archive: change "matcnfn" argument to a real matcher
Martin von Zweigbergk <martinvonz@google.com>
parents: 40247
diff changeset
   391
            submatch = matchmod.subdirmatcher(subpath, match)
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   392
            subprefix = prefix + subpath + b'/'
41631
3d9d5e612e67 subrepo: adjust subrepo prefix before calling subrepo.archive() (API)
Martin von Zweigbergk <martinvonz@google.com>
parents: 41208
diff changeset
   393
            total += sub.archive(archiver, subprefix, submatch, decode)
18967
88d1b59f6906 archive: raise error.Abort if the file pattern matches no files
Angel Ezquerra <angel.ezquerra@gmail.com>
parents: 18364
diff changeset
   394
88d1b59f6906 archive: raise error.Abort if the file pattern matches no files
Angel Ezquerra <angel.ezquerra@gmail.com>
parents: 18364
diff changeset
   395
    if total == 0:
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   396
        raise error.Abort(_(b'no files match the archive pattern'))
12323
f00953d9533c subrepo: add support for 'hg archive'
Martin Geisler <mg@aragost.com>
parents: 12321
diff changeset
   397
2112
2b03c6733efa add "archive" command, like "cvs export" only better.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
diff changeset
   398
    archiver.done()
18967
88d1b59f6906 archive: raise error.Abort if the file pattern matches no files
Angel Ezquerra <angel.ezquerra@gmail.com>
parents: 18364
diff changeset
   399
    return total