Mercurial > hg
view mercurial/grep.py @ 46335:25be21ec6c65
share: rework config options to be much clearer and easier
Recently I implemented various boolean configs which control how to behave when
there is a share-safe mismatch between source and share repository. Mismatch
means that source supports share-safe where as share does not or vice versa.
However, while discussion and documentation we realized that it's too
complicated and there are some combinations of values which makes no sense.
We decided to introduce a config option with 4 possible values which
makes controlling and understanding things easier.
The config option `share.safe-mismatch.source-{not-}safe` can have
following 4 values:
* abort (default): error out if there is mismatch
* allow: allow to work with respecting share source configuration
* {up|down}grade-abort: try to {up|down}grade, if it fails, abort
* {up|down}grade-allow: try to {up|down}grade, if it fails, continue in allow
mode
I am not sure if I can explain 3 config options which I deleted right now in
just 5 lines which is a sign of how complex they became.
No test changes demonstrate that functionality is same, only names have changed.
Differential Revision: https://phab.mercurial-scm.org/D9785
author | Pulkit Goyal <7895pulkit@gmail.com> |
---|---|
date | Mon, 18 Jan 2021 21:37:20 +0530 |
parents | f9d3ff23bfc0 |
children | d4ba4d51f85f |
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# grep.py - logic for history walk and grep # # Copyright 2005-2007 Matt Mackall <mpm@selenic.com> # # 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 difflib import errno from .i18n import _ from . import ( error, match as matchmod, pycompat, scmutil, util, ) def matchlines(body, regexp): begin = 0 linenum = 0 while begin < len(body): match = regexp.search(body, begin) if not match: break mstart, mend = match.span() linenum += body.count(b'\n', begin, mstart) + 1 lstart = body.rfind(b'\n', begin, mstart) + 1 or begin begin = body.find(b'\n', mend) + 1 or len(body) + 1 lend = begin - 1 yield linenum, mstart - lstart, mend - lstart, body[lstart:lend] class linestate(object): def __init__(self, line, linenum, colstart, colend): self.line = line self.linenum = linenum self.colstart = colstart self.colend = colend def __hash__(self): return hash(self.line) def __eq__(self, other): return self.line == other.line def findpos(self, regexp): """Iterate all (start, end) indices of matches""" yield self.colstart, self.colend p = self.colend while p < len(self.line): m = regexp.search(self.line, p) if not m: break if m.end() == p: p += 1 else: yield m.span() p = m.end() def difflinestates(a, b): sm = difflib.SequenceMatcher(None, a, b) for tag, alo, ahi, blo, bhi in sm.get_opcodes(): if tag == 'insert': for i in pycompat.xrange(blo, bhi): yield (b'+', b[i]) elif tag == 'delete': for i in pycompat.xrange(alo, ahi): yield (b'-', a[i]) elif tag == 'replace': for i in pycompat.xrange(alo, ahi): yield (b'-', a[i]) for i in pycompat.xrange(blo, bhi): yield (b'+', b[i]) class grepsearcher(object): """Search files and revisions for lines matching the given pattern Options: - all_files to search unchanged files at that revision. - diff to search files in the parent revision so diffs can be generated. - follow to skip files across copies and renames. """ def __init__( self, ui, repo, regexp, all_files=False, diff=False, follow=False ): self._ui = ui self._repo = repo self._regexp = regexp self._all_files = all_files self._diff = diff self._follow = follow self._getfile = util.lrucachefunc(repo.file) self._getrenamed = scmutil.getrenamedfn(repo) self._matches = {} self._copies = {} self._skip = set() self._revfiles = {} def skipfile(self, fn, rev): """Exclude the given file (and the copy at the specified revision) from future search""" copy = self._copies.get(rev, {}).get(fn) self._skip.add(fn) if copy: self._skip.add(copy) def searchfiles(self, revs, makefilematcher): """Walk files and revisions to yield (fn, ctx, pstates, states) matches states is a list of linestate objects. pstates may be empty unless diff is True. """ for ctx in scmutil.walkchangerevs( self._repo, revs, makefilematcher, self._prep ): rev = ctx.rev() parent = ctx.p1().rev() for fn in sorted(self._revfiles.get(rev, [])): states = self._matches[rev][fn] copy = self._copies.get(rev, {}).get(fn) if fn in self._skip: if copy: self._skip.add(copy) continue pstates = self._matches.get(parent, {}).get(copy or fn, []) if pstates or states: yield fn, ctx, pstates, states del self._revfiles[rev] # We will keep the matches dict for the duration of the window # clear the matches dict once the window is over if not self._revfiles: self._matches.clear() def _grepbody(self, fn, rev, body): self._matches[rev].setdefault(fn, []) m = self._matches[rev][fn] if body is None: return for lnum, cstart, cend, line in matchlines(body, self._regexp): s = linestate(line, lnum, cstart, cend) m.append(s) def _readfile(self, ctx, fn): rev = ctx.rev() if rev is None: fctx = ctx[fn] try: return fctx.data() except IOError as e: if e.errno != errno.ENOENT: raise else: flog = self._getfile(fn) fnode = ctx.filenode(fn) try: return flog.read(fnode) except error.CensoredNodeError: self._ui.warn( _( b'cannot search in censored file: ' b'%(filename)s:%(revnum)s\n' ) % {b'filename': fn, b'revnum': pycompat.bytestr(rev)} ) def _prep(self, ctx, fmatch): rev = ctx.rev() pctx = ctx.p1() self._matches.setdefault(rev, {}) if self._diff: parent = pctx.rev() self._matches.setdefault(parent, {}) files = self._revfiles.setdefault(rev, []) if rev is None: # in `hg grep pattern`, 2/3 of the time is spent is spent in # pathauditor checks without this in mozilla-central contextmanager = self._repo.wvfs.audit.cached else: contextmanager = util.nullcontextmanager with contextmanager(): # TODO: maybe better to warn missing files? if self._all_files: fmatch = matchmod.badmatch(fmatch, lambda f, msg: None) filenames = ctx.matches(fmatch) else: filenames = (f for f in ctx.files() if fmatch(f)) for fn in filenames: # fn might not exist in the revision (could be a file removed by # the revision). We could check `fn not in ctx` even when rev is # None, but it's less racy to protect againt that in readfile. if rev is not None and fn not in ctx: continue copy = None if self._follow: copy = self._getrenamed(fn, rev) if copy: self._copies.setdefault(rev, {})[fn] = copy if fn in self._skip: self._skip.add(copy) if fn in self._skip: continue files.append(fn) if fn not in self._matches[rev]: self._grepbody(fn, rev, self._readfile(ctx, fn)) if self._diff: pfn = copy or fn if pfn not in self._matches[parent] and pfn in pctx: self._grepbody(pfn, parent, self._readfile(pctx, pfn))