Пример #1
0
def diffpatch(ui, repo, node1, node2, tmproot, matcher, cmdline):
    template = b'hg-%h.patch'
    # write patches to temporary files
    with formatter.nullformatter(ui, b'extdiff', {}) as fm:
        cmdutil.export(
            repo,
            [repo[node1].rev(), repo[node2].rev()],
            fm,
            fntemplate=repo.vfs.reljoin(tmproot, template),
            match=matcher,
        )
    label1 = cmdutil.makefilename(repo[node1], template)
    label2 = cmdutil.makefilename(repo[node2], template)
    file1 = repo.vfs.reljoin(tmproot, label1)
    file2 = repo.vfs.reljoin(tmproot, label2)
    cmdline = formatcmdline(
        cmdline,
        repo.root,
        # no 3way while comparing patches
        do3way=False,
        parent1=file1,
        plabel1=label1,
        # while comparing patches, there is no second parent
        parent2=None,
        plabel2=None,
        child=file2,
        clabel=label2,
    )
    ui.debug(b'running %r in %s\n' % (pycompat.bytestr(cmdline), tmproot))
    ui.system(cmdline, cwd=tmproot, blockedtag=b'extdiff')
    return 1
Пример #2
0
def makepatch(ui,
              repo,
              patchlines,
              opts,
              _charsets,
              idx,
              total,
              numbered,
              patchname=None):

    desc = []
    node = None
    body = ''

    for line in patchlines:
        if line.startswith('#'):
            if line.startswith('# Node ID'):
                node = line.split()[-1]
            continue
        if line.startswith('diff -r') or line.startswith('diff --git'):
            break
        desc.append(line)

    if not patchname and not node:
        raise ValueError

    if opts.get('attach'):
        body = ('\n'.join(desc[1:]).strip()
                or 'Patch subject is complete summary.')
        body += '\n\n\n'

    if opts.get('plain'):
        while patchlines and patchlines[0].startswith('# '):
            patchlines.pop(0)
        if patchlines:
            patchlines.pop(0)
        while patchlines and not patchlines[0].strip():
            patchlines.pop(0)

    ds = patch.diffstat(patchlines, git=opts.get('git'))
    if opts.get('diffstat'):
        body += ds + '\n\n'

    if opts.get('attach') or opts.get('inline'):
        msg = email.MIMEMultipart.MIMEMultipart()
        if body:
            msg.attach(mail.mimeencode(ui, body, _charsets, opts.get('test')))
        p = mail.mimetextpatch('\n'.join(patchlines), 'x-patch',
                               opts.get('test'))
        binnode = bin(node)
        # if node is mq patch, it will have the patch file's name as a tag
        if not patchname:
            patchtags = [
                t for t in repo.nodetags(binnode)
                if t.endswith('.patch') or t.endswith('.diff')
            ]
            if patchtags:
                patchname = patchtags[0]
            elif total > 1:
                patchname = cmdutil.makefilename(repo,
                                                 '%b-%n.patch',
                                                 binnode,
                                                 seqno=idx,
                                                 total=total)
            else:
                patchname = cmdutil.makefilename(repo, '%b.patch', binnode)
        disposition = 'inline'
        if opts.get('attach'):
            disposition = 'attachment'
        p['Content-Disposition'] = disposition + '; filename=' + patchname
        msg.attach(p)
    else:
        body += '\n'.join(patchlines)
        msg = mail.mimetextpatch(body, display=opts.get('test'))

    flag = ' '.join(opts.get('flag'))
    if flag:
        flag = ' ' + flag

    subj = desc[0].strip().rstrip('. ')
    if not numbered:
        subj = '[PATCH%s] %s' % (flag, opts.get('subject') or subj)
    else:
        tlen = len(str(total))
        subj = '[PATCH %0*d of %d%s] %s' % (tlen, idx, total, flag, subj)
    msg['Subject'] = mail.headencode(ui, subj, _charsets, opts.get('test'))
    msg['X-Mercurial-Node'] = node
    return msg, subj, ds
Пример #3
0
def dodiff(ui, repo, cmdline, pats, opts):
    '''Do the actual diff:

    - copy to a temp structure if diffing 2 internal revisions
    - copy to a temp structure if diffing working revision with
      another one and more than 1 file is changed
    - just invoke the diff for a single file in the working dir
    '''

    revs = opts.get('rev')
    change = opts.get('change')
    do3way = '$parent2' in cmdline

    if revs and change:
        msg = _('cannot specify --rev and --change at the same time')
        raise error.Abort(msg)
    elif change:
        node2 = scmutil.revsingle(repo, change, None).node()
        node1a, node1b = repo.changelog.parents(node2)
    else:
        node1a, node2 = scmutil.revpair(repo, revs)
        if not revs:
            node1b = repo.dirstate.p2()
        else:
            node1b = nullid

    # Disable 3-way merge if there is only one parent
    if do3way:
        if node1b == nullid:
            do3way = False

    subrepos=opts.get('subrepos')

    matcher = scmutil.match(repo[node2], pats, opts)

    if opts.get('patch'):
        if subrepos:
            raise error.Abort(_('--patch cannot be used with --subrepos'))
        if node2 is None:
            raise error.Abort(_('--patch requires two revisions'))
    else:
        mod_a, add_a, rem_a = map(set, repo.status(node1a, node2, matcher,
                                                   listsubrepos=subrepos)[:3])
        if do3way:
            mod_b, add_b, rem_b = map(set,
                                      repo.status(node1b, node2, matcher,
                                                  listsubrepos=subrepos)[:3])
        else:
            mod_b, add_b, rem_b = set(), set(), set()
        modadd = mod_a | add_a | mod_b | add_b
        common = modadd | rem_a | rem_b
        if not common:
            return 0

    tmproot = tempfile.mkdtemp(prefix='extdiff.')
    try:
        if not opts.get('patch'):
            # Always make a copy of node1a (and node1b, if applicable)
            dir1a_files = mod_a | rem_a | ((mod_b | add_b) - add_a)
            dir1a = snapshot(ui, repo, dir1a_files, node1a, tmproot,
                             subrepos)[0]
            rev1a = '@%d' % repo[node1a].rev()
            if do3way:
                dir1b_files = mod_b | rem_b | ((mod_a | add_a) - add_b)
                dir1b = snapshot(ui, repo, dir1b_files, node1b, tmproot,
                                 subrepos)[0]
                rev1b = '@%d' % repo[node1b].rev()
            else:
                dir1b = None
                rev1b = ''

            fns_and_mtime = []

            # If node2 in not the wc or there is >1 change, copy it
            dir2root = ''
            rev2 = ''
            if node2:
                dir2 = snapshot(ui, repo, modadd, node2, tmproot, subrepos)[0]
                rev2 = '@%d' % repo[node2].rev()
            elif len(common) > 1:
                #we only actually need to get the files to copy back to
                #the working dir in this case (because the other cases
                #are: diffing 2 revisions or single file -- in which case
                #the file is already directly passed to the diff tool).
                dir2, fns_and_mtime = snapshot(ui, repo, modadd, None, tmproot,
                                               subrepos)
            else:
                # This lets the diff tool open the changed file directly
                dir2 = ''
                dir2root = repo.root

            label1a = rev1a
            label1b = rev1b
            label2 = rev2

            # If only one change, diff the files instead of the directories
            # Handle bogus modifies correctly by checking if the files exist
            if len(common) == 1:
                common_file = util.localpath(common.pop())
                dir1a = os.path.join(tmproot, dir1a, common_file)
                label1a = common_file + rev1a
                if not os.path.isfile(dir1a):
                    dir1a = os.devnull
                if do3way:
                    dir1b = os.path.join(tmproot, dir1b, common_file)
                    label1b = common_file + rev1b
                    if not os.path.isfile(dir1b):
                        dir1b = os.devnull
                dir2 = os.path.join(dir2root, dir2, common_file)
                label2 = common_file + rev2
        else:
            template = 'hg-%h.patch'
            cmdutil.export(repo, [repo[node1a].rev(), repo[node2].rev()],
                           template=repo.vfs.reljoin(tmproot, template),
                           match=matcher)
            label1a = cmdutil.makefilename(repo, template, node1a)
            label2 = cmdutil.makefilename(repo, template, node2)
            dir1a = repo.vfs.reljoin(tmproot, label1a)
            dir2 = repo.vfs.reljoin(tmproot, label2)
            dir1b = None
            label1b = None
            fns_and_mtime = []

        # Function to quote file/dir names in the argument string.
        # When not operating in 3-way mode, an empty string is
        # returned for parent2
        replace = {'parent': dir1a, 'parent1': dir1a, 'parent2': dir1b,
                   'plabel1': label1a, 'plabel2': label1b,
                   'clabel': label2, 'child': dir2,
                   'root': repo.root}
        def quote(match):
            pre = match.group(2)
            key = match.group(3)
            if not do3way and key == 'parent2':
                return pre
            return pre + util.shellquote(replace[key])

        # Match parent2 first, so 'parent1?' will match both parent1 and parent
        regex = (r'''(['"]?)([^\s'"$]*)'''
                 r'\$(parent2|parent1?|child|plabel1|plabel2|clabel|root)\1')
        if not do3way and not re.search(regex, cmdline):
            cmdline += ' $parent1 $child'
        cmdline = re.sub(regex, quote, cmdline)

        ui.debug('running %r in %s\n' % (cmdline, tmproot))
        ui.system(cmdline, cwd=tmproot)

        for copy_fn, working_fn, mtime in fns_and_mtime:
            if os.lstat(copy_fn).st_mtime != mtime:
                ui.debug('file changed while diffing. '
                         'Overwriting: %s (src: %s)\n' % (working_fn, copy_fn))
                util.copyfile(copy_fn, working_fn)

        return 1
    finally:
        ui.note(_('cleaning up temp directory\n'))
        shutil.rmtree(tmproot)
Пример #4
0
def dodiff(ui, repo, cmdline, pats, opts):
    '''Do the actual diff:

    - copy to a temp structure if diffing 2 internal revisions
    - copy to a temp structure if diffing working revision with
      another one and more than 1 file is changed
    - just invoke the diff for a single file in the working dir
    '''

    revs = opts.get('rev')
    change = opts.get('change')
    do3way = '$parent2' in cmdline

    if revs and change:
        msg = _('cannot specify --rev and --change at the same time')
        raise error.Abort(msg)
    elif change:
        node2 = scmutil.revsingle(repo, change, None).node()
        node1a, node1b = repo.changelog.parents(node2)
    else:
        node1a, node2 = scmutil.revpair(repo, revs)
        if not revs:
            node1b = repo.dirstate.p2()
        else:
            node1b = nullid

    # Disable 3-way merge if there is only one parent
    if do3way:
        if node1b == nullid:
            do3way = False

    subrepos = opts.get('subrepos')

    matcher = scmutil.match(repo[node2], pats, opts)

    if opts.get('patch'):
        if subrepos:
            raise error.Abort(_('--patch cannot be used with --subrepos'))
        if node2 is None:
            raise error.Abort(_('--patch requires two revisions'))
    else:
        mod_a, add_a, rem_a = list(
            map(set,
                repo.status(node1a, node2, matcher,
                            listsubrepos=subrepos)[:3]))
        if do3way:
            mod_b, add_b, rem_b = list(
                map(
                    set,
                    repo.status(node1b, node2, matcher,
                                listsubrepos=subrepos)[:3]))
        else:
            mod_b, add_b, rem_b = set(), set(), set()
        modadd = mod_a | add_a | mod_b | add_b
        common = modadd | rem_a | rem_b
        if not common:
            return 0

    tmproot = tempfile.mkdtemp(prefix='extdiff.')
    try:
        if not opts.get('patch'):
            # Always make a copy of node1a (and node1b, if applicable)
            dir1a_files = mod_a | rem_a | ((mod_b | add_b) - add_a)
            dir1a = snapshot(ui, repo, dir1a_files, node1a, tmproot,
                             subrepos)[0]
            rev1a = '@%d' % repo[node1a].rev()
            if do3way:
                dir1b_files = mod_b | rem_b | ((mod_a | add_a) - add_b)
                dir1b = snapshot(ui, repo, dir1b_files, node1b, tmproot,
                                 subrepos)[0]
                rev1b = '@%d' % repo[node1b].rev()
            else:
                dir1b = None
                rev1b = ''

            fnsandstat = []

            # If node2 in not the wc or there is >1 change, copy it
            dir2root = ''
            rev2 = ''
            if node2:
                dir2 = snapshot(ui, repo, modadd, node2, tmproot, subrepos)[0]
                rev2 = '@%d' % repo[node2].rev()
            elif len(common) > 1:
                #we only actually need to get the files to copy back to
                #the working dir in this case (because the other cases
                #are: diffing 2 revisions or single file -- in which case
                #the file is already directly passed to the diff tool).
                dir2, fnsandstat = snapshot(ui, repo, modadd, None, tmproot,
                                            subrepos)
            else:
                # This lets the diff tool open the changed file directly
                dir2 = ''
                dir2root = repo.root

            label1a = rev1a
            label1b = rev1b
            label2 = rev2

            # If only one change, diff the files instead of the directories
            # Handle bogus modifies correctly by checking if the files exist
            if len(common) == 1:
                common_file = util.localpath(common.pop())
                dir1a = os.path.join(tmproot, dir1a, common_file)
                label1a = common_file + rev1a
                if not os.path.isfile(dir1a):
                    dir1a = os.devnull
                if do3way:
                    dir1b = os.path.join(tmproot, dir1b, common_file)
                    label1b = common_file + rev1b
                    if not os.path.isfile(dir1b):
                        dir1b = os.devnull
                dir2 = os.path.join(dir2root, dir2, common_file)
                label2 = common_file + rev2
        else:
            template = 'hg-%h.patch'
            cmdutil.export(repo, [repo[node1a].rev(), repo[node2].rev()],
                           fntemplate=repo.vfs.reljoin(tmproot, template),
                           match=matcher)
            label1a = cmdutil.makefilename(repo, template, node1a)
            label2 = cmdutil.makefilename(repo, template, node2)
            dir1a = repo.vfs.reljoin(tmproot, label1a)
            dir2 = repo.vfs.reljoin(tmproot, label2)
            dir1b = None
            label1b = None
            fnsandstat = []

        # Function to quote file/dir names in the argument string.
        # When not operating in 3-way mode, an empty string is
        # returned for parent2
        replace = {
            'parent': dir1a,
            'parent1': dir1a,
            'parent2': dir1b,
            'plabel1': label1a,
            'plabel2': label1b,
            'clabel': label2,
            'child': dir2,
            'root': repo.root
        }

        def quote(match):
            pre = match.group(2)
            key = match.group(3)
            if not do3way and key == 'parent2':
                return pre
            return pre + util.shellquote(replace[key])

        # Match parent2 first, so 'parent1?' will match both parent1 and parent
        regex = (r'''(['"]?)([^\s'"$]*)'''
                 r'\$(parent2|parent1?|child|plabel1|plabel2|clabel|root)\1')
        if not do3way and not re.search(regex, cmdline):
            cmdline += ' $parent1 $child'
        cmdline = re.sub(regex, quote, cmdline)

        ui.debug('running %r in %s\n' % (cmdline, tmproot))
        ui.system(cmdline, cwd=tmproot, blockedtag='extdiff')

        for copy_fn, working_fn, st in fnsandstat:
            cpstat = os.lstat(copy_fn)
            # Some tools copy the file and attributes, so mtime may not detect
            # all changes.  A size check will detect more cases, but not all.
            # The only certain way to detect every case is to diff all files,
            # which could be expensive.
            # copyfile() carries over the permission, so the mode check could
            # be in an 'elif' branch, but for the case where the file has
            # changed without affecting mtime or size.
            if (cpstat.st_mtime != st.st_mtime or cpstat.st_size != st.st_size
                    or (cpstat.st_mode & 0o100) != (st.st_mode & 0o100)):
                ui.debug('file changed while diffing. '
                         'Overwriting: %s (src: %s)\n' % (working_fn, copy_fn))
                util.copyfile(copy_fn, working_fn)

        return 1
    finally:
        ui.note(_('cleaning up temp directory\n'))
        shutil.rmtree(tmproot)
Пример #5
0
def makepatch(ui, repo, patchlines, opts, _charsets, idx, total, numbered,
              patchname=None):

    desc = []
    node = None
    body = ''

    for line in patchlines:
        if line.startswith('#'):
            if line.startswith('# Node ID'):
                node = line.split()[-1]
            continue
        if line.startswith('diff -r') or line.startswith('diff --git'):
            break
        desc.append(line)

    if not patchname and not node:
        raise ValueError

    if opts.get('attach') and not opts.get('body'):
        body = ('\n'.join(desc[1:]).strip() or
                'Patch subject is complete summary.')
        body += '\n\n\n'

    if opts.get('plain'):
        while patchlines and patchlines[0].startswith('# '):
            patchlines.pop(0)
        if patchlines:
            patchlines.pop(0)
        while patchlines and not patchlines[0].strip():
            patchlines.pop(0)

    ds = patch.diffstat(patchlines, git=opts.get('git'))
    if opts.get('diffstat'):
        body += ds + '\n\n'

    addattachment = opts.get('attach') or opts.get('inline')
    if not addattachment or opts.get('body'):
        body += '\n'.join(patchlines)

    if addattachment:
        msg = email.MIMEMultipart.MIMEMultipart()
        if body:
            msg.attach(mail.mimeencode(ui, body, _charsets, opts.get('test')))
        p = mail.mimetextpatch('\n'.join(patchlines), 'x-patch',
                               opts.get('test'))
        binnode = bin(node)
        # if node is mq patch, it will have the patch file's name as a tag
        if not patchname:
            patchtags = [t for t in repo.nodetags(binnode)
                         if t.endswith('.patch') or t.endswith('.diff')]
            if patchtags:
                patchname = patchtags[0]
            elif total > 1:
                patchname = cmdutil.makefilename(repo, '%b-%n.patch',
                                                 binnode, seqno=idx,
                                                 total=total)
            else:
                patchname = cmdutil.makefilename(repo, '%b.patch', binnode)
        disposition = 'inline'
        if opts.get('attach'):
            disposition = 'attachment'
        p['Content-Disposition'] = disposition + '; filename=' + patchname
        msg.attach(p)
    else:
        msg = mail.mimetextpatch(body, display=opts.get('test'))

    flag = ' '.join(opts.get('flag'))
    if flag:
        flag = ' ' + flag

    subj = desc[0].strip().rstrip('. ')
    if not numbered:
        subj = '[PATCH%s] %s' % (flag, opts.get('subject') or subj)
    else:
        tlen = len(str(total))
        subj = '[PATCH %0*d of %d%s] %s' % (tlen, idx, total, flag, subj)
    msg['Subject'] = mail.headencode(ui, subj, _charsets, opts.get('test'))
    msg['X-Mercurial-Node'] = node
    msg['X-Mercurial-Series-Index'] = '%i' % idx
    msg['X-Mercurial-Series-Total'] = '%i' % total
    return msg, subj, ds
Пример #6
0
def makepatch(
    ui,
    repo,
    rev,
    patchlines,
    opts,
    _charsets,
    idx,
    total,
    numbered,
    patchname=None,
):

    desc = []
    node = None
    body = b''

    for line in patchlines:
        if line.startswith(b'#'):
            if line.startswith(b'# Node ID'):
                node = line.split()[-1]
            continue
        if line.startswith(b'diff -r') or line.startswith(b'diff --git'):
            break
        desc.append(line)

    if not patchname and not node:
        raise ValueError

    if opts.get(b'attach') and not opts.get(b'body'):
        body = (b'\n'.join(desc[1:]).strip()
                or b'Patch subject is complete summary.')
        body += b'\n\n\n'

    if opts.get(b'plain'):
        while patchlines and patchlines[0].startswith(b'# '):
            patchlines.pop(0)
        if patchlines:
            patchlines.pop(0)
        while patchlines and not patchlines[0].strip():
            patchlines.pop(0)

    ds = patch.diffstat(patchlines)
    if opts.get(b'diffstat'):
        body += ds + b'\n\n'

    addattachment = opts.get(b'attach') or opts.get(b'inline')
    if not addattachment or opts.get(b'body'):
        body += b'\n'.join(patchlines)

    if addattachment:
        msg = emimemultipart.MIMEMultipart()
        if body:
            msg.attach(mail.mimeencode(ui, body, _charsets, opts.get(b'test')))
        p = mail.mimetextpatch(b'\n'.join(patchlines), 'x-patch',
                               opts.get(b'test'))
        binnode = bin(node)
        # if node is mq patch, it will have the patch file's name as a tag
        if not patchname:
            patchtags = [
                t for t in repo.nodetags(binnode)
                if t.endswith(b'.patch') or t.endswith(b'.diff')
            ]
            if patchtags:
                patchname = patchtags[0]
            elif total > 1:
                patchname = cmdutil.makefilename(repo[node],
                                                 b'%b-%n.patch',
                                                 seqno=idx,
                                                 total=total)
            else:
                patchname = cmdutil.makefilename(repo[node], b'%b.patch')
        disposition = r'inline'
        if opts.get(b'attach'):
            disposition = r'attachment'
        p['Content-Disposition'] = (disposition + '; filename=' +
                                    encoding.strfromlocal(patchname))
        msg.attach(p)
    else:
        msg = mail.mimetextpatch(body, display=opts.get(b'test'))

    prefix = _formatprefix(ui, repo, rev, opts.get(b'flag'), idx, total,
                           numbered)
    subj = desc[0].strip().rstrip(b'. ')
    if not numbered:
        subj = b' '.join([prefix, opts.get(b'subject') or subj])
    else:
        subj = b' '.join([prefix, subj])
    msg['Subject'] = mail.headencode(ui, subj, _charsets, opts.get(b'test'))
    msg['X-Mercurial-Node'] = pycompat.sysstr(node)
    msg['X-Mercurial-Series-Index'] = '%i' % idx
    msg['X-Mercurial-Series-Total'] = '%i' % total
    return msg, subj, ds
Пример #7
0
def dodiff(ui, repo, cmdline, pats, opts, guitool=False):
    '''Do the actual diff:

    - copy to a temp structure if diffing 2 internal revisions
    - copy to a temp structure if diffing working revision with
      another one and more than 1 file is changed
    - just invoke the diff for a single file in the working dir
    '''

    revs = opts.get(b'rev')
    change = opts.get(b'change')
    do3way = b'$parent2' in cmdline

    if revs and change:
        msg = _(b'cannot specify --rev and --change at the same time')
        raise error.Abort(msg)
    elif change:
        ctx2 = scmutil.revsingle(repo, change, None)
        ctx1a, ctx1b = ctx2.p1(), ctx2.p2()
    else:
        ctx1a, ctx2 = scmutil.revpair(repo, revs)
        if not revs:
            ctx1b = repo[None].p2()
        else:
            ctx1b = repo[nullid]

    perfile = opts.get(b'per_file')
    confirm = opts.get(b'confirm')

    node1a = ctx1a.node()
    node1b = ctx1b.node()
    node2 = ctx2.node()

    # Disable 3-way merge if there is only one parent
    if do3way:
        if node1b == nullid:
            do3way = False

    subrepos = opts.get(b'subrepos')

    matcher = scmutil.match(repo[node2], pats, opts)

    if opts.get(b'patch'):
        if subrepos:
            raise error.Abort(_(b'--patch cannot be used with --subrepos'))
        if perfile:
            raise error.Abort(_(b'--patch cannot be used with --per-file'))
        if node2 is None:
            raise error.Abort(_(b'--patch requires two revisions'))
    else:
        mod_a, add_a, rem_a = map(
            set,
            repo.status(node1a, node2, matcher, listsubrepos=subrepos)[:3])
        if do3way:
            mod_b, add_b, rem_b = map(
                set,
                repo.status(node1b, node2, matcher, listsubrepos=subrepos)[:3],
            )
        else:
            mod_b, add_b, rem_b = set(), set(), set()
        modadd = mod_a | add_a | mod_b | add_b
        common = modadd | rem_a | rem_b
        if not common:
            return 0

    tmproot = pycompat.mkdtemp(prefix=b'extdiff.')
    try:
        if not opts.get(b'patch'):
            # Always make a copy of node1a (and node1b, if applicable)
            dir1a_files = mod_a | rem_a | ((mod_b | add_b) - add_a)
            dir1a = snapshot(ui, repo, dir1a_files, node1a, tmproot,
                             subrepos)[0]
            rev1a = b'@%d' % repo[node1a].rev()
            if do3way:
                dir1b_files = mod_b | rem_b | ((mod_a | add_a) - add_b)
                dir1b = snapshot(ui, repo, dir1b_files, node1b, tmproot,
                                 subrepos)[0]
                rev1b = b'@%d' % repo[node1b].rev()
            else:
                dir1b = None
                rev1b = b''

            fnsandstat = []

            # If node2 in not the wc or there is >1 change, copy it
            dir2root = b''
            rev2 = b''
            if node2:
                dir2 = snapshot(ui, repo, modadd, node2, tmproot, subrepos)[0]
                rev2 = b'@%d' % repo[node2].rev()
            elif len(common) > 1:
                # we only actually need to get the files to copy back to
                # the working dir in this case (because the other cases
                # are: diffing 2 revisions or single file -- in which case
                # the file is already directly passed to the diff tool).
                dir2, fnsandstat = snapshot(ui, repo, modadd, None, tmproot,
                                            subrepos)
            else:
                # This lets the diff tool open the changed file directly
                dir2 = b''
                dir2root = repo.root

            label1a = rev1a
            label1b = rev1b
            label2 = rev2

            # If only one change, diff the files instead of the directories
            # Handle bogus modifies correctly by checking if the files exist
            if len(common) == 1:
                common_file = util.localpath(common.pop())
                dir1a = os.path.join(tmproot, dir1a, common_file)
                label1a = common_file + rev1a
                if not os.path.isfile(dir1a):
                    dir1a = os.devnull
                if do3way:
                    dir1b = os.path.join(tmproot, dir1b, common_file)
                    label1b = common_file + rev1b
                    if not os.path.isfile(dir1b):
                        dir1b = os.devnull
                dir2 = os.path.join(dir2root, dir2, common_file)
                label2 = common_file + rev2
        else:
            template = b'hg-%h.patch'
            with formatter.nullformatter(ui, b'extdiff', {}) as fm:
                cmdutil.export(
                    repo,
                    [repo[node1a].rev(), repo[node2].rev()],
                    fm,
                    fntemplate=repo.vfs.reljoin(tmproot, template),
                    match=matcher,
                )
            label1a = cmdutil.makefilename(repo[node1a], template)
            label2 = cmdutil.makefilename(repo[node2], template)
            dir1a = repo.vfs.reljoin(tmproot, label1a)
            dir2 = repo.vfs.reljoin(tmproot, label2)
            dir1b = None
            label1b = None
            fnsandstat = []

        if not perfile:
            # Run the external tool on the 2 temp directories or the patches
            cmdline = formatcmdline(
                cmdline,
                repo.root,
                do3way=do3way,
                parent1=dir1a,
                plabel1=label1a,
                parent2=dir1b,
                plabel2=label1b,
                child=dir2,
                clabel=label2,
            )
            ui.debug(b'running %r in %s\n' %
                     (pycompat.bytestr(cmdline), tmproot))
            ui.system(cmdline, cwd=tmproot, blockedtag=b'extdiff')
        else:
            # Run the external tool once for each pair of files
            _runperfilediff(
                cmdline,
                repo.root,
                ui,
                guitool=guitool,
                do3way=do3way,
                confirm=confirm,
                commonfiles=common,
                tmproot=tmproot,
                dir1a=dir1a,
                dir1b=dir1b,
                dir2root=dir2root,
                dir2=dir2,
                rev1a=rev1a,
                rev1b=rev1b,
                rev2=rev2,
            )

        for copy_fn, working_fn, st in fnsandstat:
            cpstat = os.lstat(copy_fn)
            # Some tools copy the file and attributes, so mtime may not detect
            # all changes.  A size check will detect more cases, but not all.
            # The only certain way to detect every case is to diff all files,
            # which could be expensive.
            # copyfile() carries over the permission, so the mode check could
            # be in an 'elif' branch, but for the case where the file has
            # changed without affecting mtime or size.
            if (cpstat[stat.ST_MTIME] != st[stat.ST_MTIME]
                    or cpstat.st_size != st.st_size
                    or (cpstat.st_mode & 0o100) != (st.st_mode & 0o100)):
                ui.debug(b'file changed while diffing. '
                         b'Overwriting: %s (src: %s)\n' %
                         (working_fn, copy_fn))
                util.copyfile(copy_fn, working_fn)

        return 1
    finally:
        ui.note(_(b'cleaning up temp directory\n'))
        shutil.rmtree(tmproot)