mercurial/filemerge.py
author Augie Fackler <raf@durin42.com>
Wed, 12 Mar 2014 13:21:17 -0400
changeset 20685 56b1f39dd0c1
parent 20676 89b2336e5ccf
child 21100 098a274764b3
permissions -rw-r--r--
test-url: move from dict() construction to {} literals The latter are both faster and more consistent across Python 2 and 3.
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# filemerge.py - file-level merge handling for Mercurial
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#
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# Copyright 2006, 2007, 2008 Matt Mackall <mpm@selenic.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 node import short
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from i18n import _
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import util, simplemerge, match, error
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import os, tempfile, re, filecmp
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def _toolstr(ui, tool, part, default=""):
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    return ui.config("merge-tools", tool + "." + part, default)
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def _toolbool(ui, tool, part, default=False):
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    return ui.configbool("merge-tools", tool + "." + part, default)
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def _toollist(ui, tool, part, default=[]):
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    return ui.configlist("merge-tools", tool + "." + part, default)
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internals = {}
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def internaltool(name, trymerge, onfailure=None):
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    '''return a decorator for populating internal merge tool table'''
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    def decorator(func):
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        fullname = 'internal:' + name
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        func.__doc__ = "``%s``\n" % fullname + func.__doc__.strip()
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        internals[fullname] = func
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        func.trymerge = trymerge
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        func.onfailure = onfailure
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        return func
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    return decorator
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def _findtool(ui, tool):
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    if tool in internals:
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        return tool
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    for kn in ("regkey", "regkeyalt"):
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        k = _toolstr(ui, tool, kn)
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        if not k:
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            continue
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        p = util.lookupreg(k, _toolstr(ui, tool, "regname"))
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        if p:
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            p = util.findexe(p + _toolstr(ui, tool, "regappend"))
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            if p:
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                return p
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    exe = _toolstr(ui, tool, "executable", tool)
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    return util.findexe(util.expandpath(exe))
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def _picktool(repo, ui, path, binary, symlink):
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    def check(tool, pat, symlink, binary):
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        tmsg = tool
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        if pat:
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            tmsg += " specified for " + pat
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        if not _findtool(ui, tool):
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            if pat: # explicitly requested tool deserves a warning
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                ui.warn(_("couldn't find merge tool %s\n") % tmsg)
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            else: # configured but non-existing tools are more silent
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                ui.note(_("couldn't find merge tool %s\n") % tmsg)
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        elif symlink and not _toolbool(ui, tool, "symlink"):
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            ui.warn(_("tool %s can't handle symlinks\n") % tmsg)
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        elif binary and not _toolbool(ui, tool, "binary"):
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            ui.warn(_("tool %s can't handle binary\n") % tmsg)
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        elif not util.gui() and _toolbool(ui, tool, "gui"):
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            ui.warn(_("tool %s requires a GUI\n") % tmsg)
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        else:
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            return True
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        return False
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    # forcemerge comes from command line arguments, highest priority
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    force = ui.config('ui', 'forcemerge')
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    if force:
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        toolpath = _findtool(ui, force)
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        if toolpath:
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            return (force, util.shellquote(toolpath))
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        else:
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            # mimic HGMERGE if given tool not found
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            return (force, force)
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    # HGMERGE takes next precedence
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    hgmerge = os.environ.get("HGMERGE")
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    if hgmerge:
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        return (hgmerge, hgmerge)
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    # then patterns
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    for pat, tool in ui.configitems("merge-patterns"):
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        mf = match.match(repo.root, '', [pat])
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        if mf(path) and check(tool, pat, symlink, False):
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            toolpath = _findtool(ui, tool)
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            return (tool, util.shellquote(toolpath))
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    # then merge tools
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    tools = {}
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    for k, v in ui.configitems("merge-tools"):
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        t = k.split('.')[0]
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        if t not in tools:
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            tools[t] = int(_toolstr(ui, t, "priority", "0"))
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    names = tools.keys()
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    tools = sorted([(-p, t) for t, p in tools.items()])
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    uimerge = ui.config("ui", "merge")
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    if uimerge:
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        if uimerge not in names:
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            return (uimerge, uimerge)
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        tools.insert(0, (None, uimerge)) # highest priority
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    tools.append((None, "hgmerge")) # the old default, if found
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    for p, t in tools:
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        if check(t, None, symlink, binary):
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            toolpath = _findtool(ui, t)
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            return (t, util.shellquote(toolpath))
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    # internal merge or prompt as last resort
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    if symlink or binary:
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        return "internal:prompt", None
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    return "internal:merge", None
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def _eoltype(data):
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    "Guess the EOL type of a file"
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    if '\0' in data: # binary
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        return None
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    if '\r\n' in data: # Windows
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        return '\r\n'
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    if '\r' in data: # Old Mac
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        return '\r'
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    if '\n' in data: # UNIX
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        return '\n'
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    return None # unknown
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def _matcheol(file, origfile):
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    "Convert EOL markers in a file to match origfile"
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    tostyle = _eoltype(util.readfile(origfile))
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    if tostyle:
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        data = util.readfile(file)
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        style = _eoltype(data)
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        if style:
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            newdata = data.replace(style, tostyle)
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            if newdata != data:
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                util.writefile(file, newdata)
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@internaltool('prompt', False)
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def _iprompt(repo, mynode, orig, fcd, fco, fca, toolconf):
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    """Asks the user which of the local or the other version to keep as
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    the merged version."""
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    ui = repo.ui
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    fd = fcd.path()
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    if ui.promptchoice(_(" no tool found to merge %s\n"
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                         "keep (l)ocal or take (o)ther?"
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                         "$$ &Local $$ &Other") % fd, 0):
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        return _iother(repo, mynode, orig, fcd, fco, fca, toolconf)
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    else:
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        return _ilocal(repo, mynode, orig, fcd, fco, fca, toolconf)
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@internaltool('local', False)
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def _ilocal(repo, mynode, orig, fcd, fco, fca, toolconf):
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    """Uses the local version of files as the merged version."""
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    return 0
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@internaltool('other', False)
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def _iother(repo, mynode, orig, fcd, fco, fca, toolconf):
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    """Uses the other version of files as the merged version."""
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    repo.wwrite(fcd.path(), fco.data(), fco.flags())
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    return 0
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@internaltool('fail', False)
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def _ifail(repo, mynode, orig, fcd, fco, fca, toolconf):
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    """
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    Rather than attempting to merge files that were modified on both
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    branches, it marks them as unresolved. The resolve command must be
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    used to resolve these conflicts."""
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    return 1
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def _premerge(repo, toolconf, files):
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    tool, toolpath, binary, symlink = toolconf
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    if symlink:
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        return 1
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    a, b, c, back = files
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    ui = repo.ui
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    # do we attempt to simplemerge first?
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    try:
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        premerge = _toolbool(ui, tool, "premerge", not binary)
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    except error.ConfigError:
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        premerge = _toolstr(ui, tool, "premerge").lower()
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        valid = 'keep'.split()
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        if premerge not in valid:
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            _valid = ', '.join(["'" + v + "'" for v in valid])
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            raise error.ConfigError(_("%s.premerge not valid "
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                                      "('%s' is neither boolean nor %s)") %
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                                    (tool, premerge, _valid))
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   191
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    if premerge:
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        r = simplemerge.simplemerge(ui, a, b, c, quiet=True)
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        if not r:
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            ui.debug(" premerge successful\n")
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            return 0
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        if premerge != 'keep':
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            util.copyfile(back, a) # restore from backup and try again
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    return 1 # continue merging
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@internaltool('merge', True,
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              _("merging %s incomplete! "
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                "(edit conflicts, then use 'hg resolve --mark')\n"))
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def _imerge(repo, mynode, orig, fcd, fco, fca, toolconf, files):
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    """
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    Uses the internal non-interactive simple merge algorithm for merging
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    files. It will fail if there are any conflicts and leave markers in
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    the partially merged file."""
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    tool, toolpath, binary, symlink = toolconf
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    if symlink:
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        repo.ui.warn(_('warning: internal:merge cannot merge symlinks '
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                       'for %s\n') % fcd.path())
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        return False, 1
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    r = _premerge(repo, toolconf, files)
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    if r:
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        a, b, c, back = files
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        ui = repo.ui
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        r = simplemerge.simplemerge(ui, a, b, c, label=['local', 'other'])
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        return True, r
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    return False, 0
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   224
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@internaltool('dump', True)
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def _idump(repo, mynode, orig, fcd, fco, fca, toolconf, files):
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    """
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    Creates three versions of the files to merge, containing the
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    contents of local, other and base. These files can then be used to
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    perform a merge manually. If the file to be merged is named
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    ``a.txt``, these files will accordingly be named ``a.txt.local``,
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    ``a.txt.other`` and ``a.txt.base`` and they will be placed in the
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    same directory as ``a.txt``."""
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    r = _premerge(repo, toolconf, files)
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    if r:
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        a, b, c, back = files
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        fd = fcd.path()
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        util.copyfile(a, a + ".local")
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        repo.wwrite(fd + ".other", fco.data(), fco.flags())
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        repo.wwrite(fd + ".base", fca.data(), fca.flags())
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    return False, r
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def _xmerge(repo, mynode, orig, fcd, fco, fca, toolconf, files):
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    r = _premerge(repo, toolconf, files)
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    if r:
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        tool, toolpath, binary, symlink = toolconf
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        a, b, c, back = files
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        out = ""
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        env = {'HG_FILE': fcd.path(),
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               'HG_MY_NODE': short(mynode),
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               'HG_OTHER_NODE': str(fco.changectx()),
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               'HG_BASE_NODE': str(fca.changectx()),
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               'HG_MY_ISLINK': 'l' in fcd.flags(),
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               'HG_OTHER_ISLINK': 'l' in fco.flags(),
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               'HG_BASE_ISLINK': 'l' in fca.flags(),
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               }
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        ui = repo.ui
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        args = _toolstr(ui, tool, "args", '$local $base $other')
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        if "$output" in args:
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            out, a = a, back # read input from backup, write to original
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        replace = {'local': a, 'base': b, 'other': c, 'output': out}
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        args = util.interpolate(r'\$', replace, args,
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Keegan Carruthers-Smith <keegancsmith@fb.com>
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                                lambda s: util.shellquote(util.localpath(s)))
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        r = util.system(toolpath + ' ' + args, cwd=repo.root, environ=env,
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                        out=ui.fout)
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        return True, r
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    return False, 0
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   272
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def filemerge(repo, mynode, orig, fcd, fco, fca):
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    """perform a 3-way merge in the working directory
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    mynode = parent node before merge
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    orig = original local filename before merge
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    fco = other file context
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   279
    fca = ancestor file context
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    fcd = local file context for current/destination file
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    """
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    def temp(prefix, ctx):
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        pre = "%s~%s." % (os.path.basename(ctx.path()), prefix)
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        (fd, name) = tempfile.mkstemp(prefix=pre)
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        data = repo.wwritedata(ctx.path(), ctx.data())
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        f = os.fdopen(fd, "wb")
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        f.write(data)
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        f.close()
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        return name
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   291
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eb07fbc21e9c filectx: use cmp(self, fctx) instead of cmp(self, text)
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   292
    if not fco.cmp(fcd): # files identical?
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   293
        return None
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   294
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   295
    ui = repo.ui
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   296
    fd = fcd.path()
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e86dd8dfdea0 context: add isbinary function
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diff changeset
   297
    binary = fcd.isbinary() or fco.isbinary() or fca.isbinary()
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d3691d31fc9c context: remove islink and isexec methods
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   298
    symlink = 'l' in fcd.flags() + fco.flags()
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   299
    tool, toolpath = _picktool(repo, ui, fd, binary, symlink)
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   300
    ui.debug("picked tool '%s' for %s (binary %s symlink %s)\n" %
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               (tool, fd, binary, symlink))
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   302
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   303
    if tool in internals:
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   304
        func = internals[tool]
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diff changeset
   305
        trymerge = func.trymerge
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   306
        onfailure = func.onfailure
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diff changeset
   307
    else:
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   308
        func = _xmerge
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   309
        trymerge = True
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   310
        onfailure = _("merging %s failed!\n")
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   311
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    toolconf = tool, toolpath, binary, symlink
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   313
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   314
    if not trymerge:
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   315
        return func(repo, mynode, orig, fcd, fco, fca, toolconf)
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   316
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   317
    a = repo.wjoin(fd)
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   318
    b = temp("base", fca)
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   319
    c = temp("other", fco)
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   320
    back = a + ".orig"
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   321
    util.copyfile(a, back)
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   322
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diff changeset
   323
    if orig != fco.path():
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94ca38e63576 use ui instead of repo.ui when the former is in scope
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parents: 8567
diff changeset
   324
        ui.status(_("merging %s and %s to %s\n") % (orig, fco.path(), fd))
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   325
    else:
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diff changeset
   326
        ui.status(_("merging %s\n") % fd)
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   327
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diff changeset
   328
    ui.debug("my %s other %s ancestor %s\n" % (fcd, fco, fca))
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diff changeset
   329
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diff changeset
   330
    needcheck, r = func(repo, mynode, orig, fcd, fco, fca, toolconf,
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diff changeset
   331
                        (a, b, c, back))
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diff changeset
   332
    if not needcheck:
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diff changeset
   333
        if r:
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diff changeset
   334
            if onfailure:
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   335
                ui.warn(onfailure % fd)
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diff changeset
   336
        else:
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   337
            os.unlink(back)
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diff changeset
   338
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diff changeset
   339
        os.unlink(b)
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diff changeset
   340
        os.unlink(c)
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diff changeset
   341
        return r
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diff changeset
   342
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diff changeset
   343
    if not r and (_toolbool(ui, tool, "checkconflicts") or
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diff changeset
   344
                  'conflicts' in _toollist(ui, tool, "check")):
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8e7960feb139 Fix merge-tools.checkconflicts
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parents: 12008
diff changeset
   345
        if re.search("^(<<<<<<< .*|=======|>>>>>>> .*)$", fcd.data(),
8e7960feb139 Fix merge-tools.checkconflicts
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diff changeset
   346
                     re.MULTILINE):
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diff changeset
   347
            r = 1
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   348
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diff changeset
   349
    checked = False
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diff changeset
   350
    if 'prompt' in _toollist(ui, tool, "check"):
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diff changeset
   351
        checked = True
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diff changeset
   352
        if ui.promptchoice(_("was merge of '%s' successful (yn)?"
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diff changeset
   353
                             "$$ &Yes $$ &No") % fd, 1):
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diff changeset
   354
            r = 1
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diff changeset
   355
d3c1eddfdbcf merge: tool.check = prompt will force an interactive merge check
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diff changeset
   356
    if not r and not checked and (_toolbool(ui, tool, "checkchanged") or
d3c1eddfdbcf merge: tool.check = prompt will force an interactive merge check
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diff changeset
   357
                                  'changed' in _toollist(ui, tool, "check")):
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diff changeset
   358
        if filecmp.cmp(a, back):
9048
86b4a9b0ddda ui: extract choice from prompt
Simon Heimberg <simohe@besonet.ch>
parents: 8861
diff changeset
   359
            if ui.promptchoice(_(" output file %s appears unchanged\n"
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diff changeset
   360
                                 "was merge successful (yn)?"
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diff changeset
   361
                                 "$$ &Yes $$ &No") % fd, 1):
6075
63e0e57ab157 filemerge: add 'checkchanged' merge tool property
Steve Borho <steve@borho.org>
parents: 6025
diff changeset
   362
                r = 1
63e0e57ab157 filemerge: add 'checkchanged' merge tool property
Steve Borho <steve@borho.org>
parents: 6025
diff changeset
   363
6005
3c33032d8906 merge: add support for tool EOL fixups
Matt Mackall <mpm@selenic.com>
parents: 6004
diff changeset
   364
    if _toolbool(ui, tool, "fixeol"):
16125
83925d3a4559 filemerge: refactoring of 'filemerge()'
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15738
diff changeset
   365
        _matcheol(a, back)
6005
3c33032d8906 merge: add support for tool EOL fixups
Matt Mackall <mpm@selenic.com>
parents: 6004
diff changeset
   366
6003
7855b88ba838 filemerge: pull file-merging code into its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   367
    if r:
16125
83925d3a4559 filemerge: refactoring of 'filemerge()'
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15738
diff changeset
   368
        if onfailure:
83925d3a4559 filemerge: refactoring of 'filemerge()'
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 15738
diff changeset
   369
            ui.warn(onfailure % fd)
6004
5af5f0f9d724 merge: allow smarter tool configuration
Matt Mackall <mpm@selenic.com>
parents: 6003
diff changeset
   370
    else:
5af5f0f9d724 merge: allow smarter tool configuration
Matt Mackall <mpm@selenic.com>
parents: 6003
diff changeset
   371
        os.unlink(back)
6003
7855b88ba838 filemerge: pull file-merging code into its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   372
7855b88ba838 filemerge: pull file-merging code into its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   373
    os.unlink(b)
7855b88ba838 filemerge: pull file-merging code into its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   374
    os.unlink(c)
7855b88ba838 filemerge: pull file-merging code into its own module
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
   375
    return r
16126
0c4bec9596d8 filemerge: create detail of internal merge tools from documentation string
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 16125
diff changeset
   376
0c4bec9596d8 filemerge: create detail of internal merge tools from documentation string
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 16125
diff changeset
   377
# tell hggettext to extract docstrings from these functions:
0c4bec9596d8 filemerge: create detail of internal merge tools from documentation string
FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
parents: 16125
diff changeset
   378
i18nfunctions = internals.values()