Mercurial > hg
view mercurial/rcutil.py @ 45999:c4c7a6b61146
match: skip walking up the directory hierarchy if the number of pats are small
Previously, we would receive a path like abc/def/ghi and "walk up" the directory
hierarchy, checking abc/def, abc, and `b''` to see if they were in the set of
prefixes that this matcher covered. We did this indiscriminately - we generated
all of these paths even if the set of prefixes the matcher covered was
completely empty, which is the case for a lot of repos at my company (the narrow
matcher we use is usually non-recursive).
This brings the time for a rebase in one of my repos from 12.20s to 10.87s. In
this particular repo, this is entirely due to the `len(prefix_set) == 0` check,
as I do not have any recursive patterns in the narrowspec.
Differential Revision: https://phab.mercurial-scm.org/D9488
author | Kyle Lippincott <spectral@google.com> |
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date | Mon, 30 Nov 2020 12:30:58 -0800 |
parents | 89a2afe31e82 |
children | 6000f5b25c9b |
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# rcutil.py - utilities about config paths, special config sections etc. # # Copyright Mercurial Contributors # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import import os from . import ( encoding, pycompat, util, ) from .utils import resourceutil if pycompat.iswindows: from . import scmwindows as scmplatform else: from . import scmposix as scmplatform fallbackpager = scmplatform.fallbackpager systemrcpath = scmplatform.systemrcpath userrcpath = scmplatform.userrcpath def _expandrcpath(path): '''path could be a file or a directory. return a list of file paths''' p = util.expandpath(path) if os.path.isdir(p): join = os.path.join return sorted( join(p, f) for f, k in util.listdir(p) if f.endswith(b'.rc') ) return [p] def envrcitems(env=None): """Return [(section, name, value, source)] config items. The config items are extracted from environment variables specified by env, used to override systemrc, but not userrc. If env is not provided, encoding.environ will be used. """ if env is None: env = encoding.environ checklist = [ (b'EDITOR', b'ui', b'editor'), (b'VISUAL', b'ui', b'editor'), (b'PAGER', b'pager', b'pager'), ] result = [] for envname, section, configname in checklist: if envname not in env: continue result.append((section, configname, env[envname], b'$%s' % envname)) return result def default_rc_resources(): """return rc resource IDs in defaultrc""" rsrcs = resourceutil.contents(b'mercurial.defaultrc') return [ (b'mercurial.defaultrc', r) for r in sorted(rsrcs) if resourceutil.is_resource(b'mercurial.defaultrc', r) and r.endswith(b'.rc') ] def rccomponents(): """return an ordered [(type, obj)] about where to load configs. respect $HGRCPATH. if $HGRCPATH is empty, only .hg/hgrc of current repo is used. if $HGRCPATH is not set, the platform default will be used. if a directory is provided, *.rc files under it will be used. type could be either 'path', 'items' or 'resource'. If type is 'path', obj is a string, and is the config file path. if type is 'items', obj is a list of (section, name, value, source) that should fill the config directly. If type is 'resource', obj is a tuple of (package name, resource name). """ envrc = (b'items', envrcitems()) if b'HGRCPATH' in encoding.environ: # assume HGRCPATH is all about user configs so environments can be # overridden. _rccomponents = [envrc] for p in encoding.environ[b'HGRCPATH'].split(pycompat.ospathsep): if not p: continue _rccomponents.extend((b'path', p) for p in _expandrcpath(p)) else: _rccomponents = [(b'resource', r) for r in default_rc_resources()] normpaths = lambda paths: [ (b'path', os.path.normpath(p)) for p in paths ] _rccomponents.extend(normpaths(systemrcpath())) _rccomponents.append(envrc) _rccomponents.extend(normpaths(userrcpath())) return _rccomponents def defaultpagerenv(): """return a dict of default environment variables and their values, intended to be set before starting a pager. """ return {b'LESS': b'FRX', b'LV': b'-c'} def use_repo_hgrc(): """True if repositories `.hg/hgrc` config should be read""" return b'HGRCSKIPREPO' not in encoding.environ