hgext/schemes.py
author Pierre-Yves David <pierre-yves.david@octobus.net>
Sat, 07 Aug 2021 12:39:01 +0200
branchstable
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child 48875 6000f5b25c9b
permissions -rw-r--r--
issue6528: implement _is_revision_affected_fast using callback The delta comming from a bundle/stream does not exists in the revlog yet, so we will need other way to retrieve the same information. To prepare for this we split the function to use callbacks in the core logic. Differential Revision: https://phab.mercurial-scm.org/D11268
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# Copyright 2009, Alexander Solovyov <piranha@piranha.org.ua>
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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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"""extend schemes with shortcuts to repository swarms
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This extension allows you to specify shortcuts for parent URLs with a
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lot of repositories to act like a scheme, for example::
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  [schemes]
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  py = http://code.python.org/hg/
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After that you can use it like::
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  hg clone py://trunk/
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Additionally there is support for some more complex schemas, for
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example used by Google Code::
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  [schemes]
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  gcode = http://{1}.googlecode.com/hg/
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The syntax is taken from Mercurial templates, and you have unlimited
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number of variables, starting with ``{1}`` and continuing with
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``{2}``, ``{3}`` and so on. This variables will receive parts of URL
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supplied, split by ``/``. Anything not specified as ``{part}`` will be
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just appended to an URL.
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For convenience, the extension adds these schemes by default::
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  [schemes]
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  py = http://hg.python.org/
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  bb = https://bitbucket.org/
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  bb+ssh = ssh://hg@bitbucket.org/
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  gcode = https://{1}.googlecode.com/hg/
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  kiln = https://{1}.kilnhg.com/Repo/
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You can override a predefined scheme by defining a new scheme with the
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same name.
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"""
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from __future__ import absolute_import
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import os
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import re
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from mercurial.i18n import _
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from mercurial import (
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    error,
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    extensions,
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    hg,
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    pycompat,
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    registrar,
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    templater,
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)
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from mercurial.utils import (
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    urlutil,
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)
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cmdtable = {}
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command = registrar.command(cmdtable)
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# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
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# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
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# be specifying the version(s) of Mercurial they are tested with, or
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# leave the attribute unspecified.
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testedwith = b'ships-with-hg-core'
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_partre = re.compile(br'{(\d+)\}')
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class ShortRepository(object):
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    def __init__(self, url, scheme, templater):
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        self.scheme = scheme
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        self.templater = templater
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        self.url = url
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        try:
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            self.parts = max(map(int, _partre.findall(self.url)))
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        except ValueError:
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            self.parts = 0
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    def __repr__(self):
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        return b'<ShortRepository: %s>' % self.scheme
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    def instance(self, ui, url, create, intents=None, createopts=None):
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        url = self.resolve(url)
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        return hg._peerlookup(url).instance(
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            ui, url, create, intents=intents, createopts=createopts
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        )
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    def resolve(self, url):
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        # Should this use the urlutil.url class, or is manual parsing better?
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        try:
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            url = url.split(b'://', 1)[1]
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        except IndexError:
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            raise error.Abort(_(b"no '://' in scheme url '%s'") % url)
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        parts = url.split(b'/', self.parts)
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        if len(parts) > self.parts:
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            tail = parts[-1]
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            parts = parts[:-1]
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        else:
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            tail = b''
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        context = {b'%d' % (i + 1): v for i, v in enumerate(parts)}
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        return b''.join(self.templater.process(self.url, context)) + tail
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def hasdriveletter(orig, path):
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    if path:
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        for scheme in schemes:
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            if path.startswith(scheme + b':'):
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                return False
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    return orig(path)
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schemes = {
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    b'py': b'http://hg.python.org/',
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    b'bb': b'https://bitbucket.org/',
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    b'bb+ssh': b'ssh://hg@bitbucket.org/',
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    b'gcode': b'https://{1}.googlecode.com/hg/',
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    b'kiln': b'https://{1}.kilnhg.com/Repo/',
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}
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def extsetup(ui):
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    schemes.update(dict(ui.configitems(b'schemes')))
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    t = templater.engine(templater.parse)
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    for scheme, url in schemes.items():
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        if (
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            pycompat.iswindows
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            and len(scheme) == 1
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            and scheme.isalpha()
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            and os.path.exists(b'%s:\\' % scheme)
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        ):
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            raise error.Abort(
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                _(
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                    b'custom scheme %s:// conflicts with drive '
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                    b'letter %s:\\\n'
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                )
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                % (scheme, scheme.upper())
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            )
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        hg.schemes[scheme] = ShortRepository(url, scheme, t)
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    extensions.wrapfunction(urlutil, b'hasdriveletter', hasdriveletter)
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@command(b'debugexpandscheme', norepo=True)
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def expandscheme(ui, url, **opts):
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    """given a repo path, provide the scheme-expanded path"""
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    repo = hg._peerlookup(url)
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    if isinstance(repo, ShortRepository):
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        url = repo.resolve(url)
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    ui.write(url + b'\n')