Mercurial > hg
view mercurial/templatekw.py @ 24735:07200e3332a1
tags: extract .hgtags filenodes cache to a standalone file
Resolution of .hgtags filenodes values has historically been a
performance pain point for large repositories, where reading individual
manifests can take over 100ms. Multiplied by hundreds or even thousands
of heads and resolving .hgtags filenodes becomes a performance issue.
This patch establishes a standalone cache file holding the .hgtags
filenodes for each changeset. After this patch, the .hgtags filenode
for any particular changeset should only have to be computed once
during the lifetime of the repository.
The introduced hgtagsfnodes1 cache file is modeled after the rev branch
cache: the cache is effectively an array of entries consisting of a
changeset fragment and the filenode for a revision. The file grows in
proportion to the length of the repository (24 bytes per changeset) and
is truncated when the repository is stripped. The file is not written
unless tag info is requested and tags have changed since last time.
This patch partially addresses issue4550. Future patches will split the
"tags" cache file into per-filter files and will refactor the cache
format to not capture the .hgtags fnodes, as these are now stored in
the hgtagsfnodes1 cache. This patch is capable of standing alone. We
should not have to wait on the tags cache filter split and format
refactor for this patch to land.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Wed, 15 Apr 2015 17:42:38 -0400 |
parents | 13c42a883e8b |
children | a02d293a1079 ed18f4acf435 |
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# templatekw.py - common changeset template keywords # # Copyright 2005-2009 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 node import hex import patch, util, error import hbisect # This helper class allows us to handle both: # "{files}" (legacy command-line-specific list hack) and # "{files % '{file}\n'}" (hgweb-style with inlining and function support) # and to access raw values: # "{ifcontains(file, files, ...)}", "{ifcontains(key, extras, ...)}" # "{get(extras, key)}" class _hybrid(object): def __init__(self, gen, values, makemap, joinfmt=None): self.gen = gen self.values = values self._makemap = makemap if joinfmt: self.joinfmt = joinfmt else: self.joinfmt = lambda x: x.values()[0] def __iter__(self): return self.gen def __call__(self): makemap = self._makemap for x in self.values: yield makemap(x) def __contains__(self, x): return x in self.values def __len__(self): return len(self.values) def __getattr__(self, name): if name != 'get': raise AttributeError(name) return getattr(self.values, name) def showlist(name, values, plural=None, element=None, **args): if not element: element = name f = _showlist(name, values, plural, **args) return _hybrid(f, values, lambda x: {element: x}) def _showlist(name, values, plural=None, **args): '''expand set of values. name is name of key in template map. values is list of strings or dicts. plural is plural of name, if not simply name + 's'. expansion works like this, given name 'foo'. if values is empty, expand 'no_foos'. if 'foo' not in template map, return values as a string, joined by space. expand 'start_foos'. for each value, expand 'foo'. if 'last_foo' in template map, expand it instead of 'foo' for last key. expand 'end_foos'. ''' templ = args['templ'] if plural: names = plural else: names = name + 's' if not values: noname = 'no_' + names if noname in templ: yield templ(noname, **args) return if name not in templ: if isinstance(values[0], str): yield ' '.join(values) else: for v in values: yield dict(v, **args) return startname = 'start_' + names if startname in templ: yield templ(startname, **args) vargs = args.copy() def one(v, tag=name): try: vargs.update(v) except (AttributeError, ValueError): try: for a, b in v: vargs[a] = b except ValueError: vargs[name] = v return templ(tag, **vargs) lastname = 'last_' + name if lastname in templ: last = values.pop() else: last = None for v in values: yield one(v) if last is not None: yield one(last, tag=lastname) endname = 'end_' + names if endname in templ: yield templ(endname, **args) def getfiles(repo, ctx, revcache): if 'files' not in revcache: revcache['files'] = repo.status(ctx.p1().node(), ctx.node())[:3] return revcache['files'] def getlatesttags(repo, ctx, cache): '''return date, distance and name for the latest tag of rev''' if 'latesttags' not in cache: # Cache mapping from rev to a tuple with tag date, tag # distance and tag name cache['latesttags'] = {-1: (0, 0, 'null')} latesttags = cache['latesttags'] rev = ctx.rev() todo = [rev] while todo: rev = todo.pop() if rev in latesttags: continue ctx = repo[rev] tags = [t for t in ctx.tags() if (repo.tagtype(t) and repo.tagtype(t) != 'local')] if tags: latesttags[rev] = ctx.date()[0], 0, ':'.join(sorted(tags)) continue try: # The tuples are laid out so the right one can be found by # comparison. pdate, pdist, ptag = max( latesttags[p.rev()] for p in ctx.parents()) except KeyError: # Cache miss - recurse todo.append(rev) todo.extend(p.rev() for p in ctx.parents()) continue latesttags[rev] = pdate, pdist + 1, ptag return latesttags[rev] def getrenamedfn(repo, endrev=None): rcache = {} if endrev is None: endrev = len(repo) def getrenamed(fn, rev): '''looks up all renames for a file (up to endrev) the first time the file is given. It indexes on the changerev and only parses the manifest if linkrev != changerev. Returns rename info for fn at changerev rev.''' if fn not in rcache: rcache[fn] = {} fl = repo.file(fn) for i in fl: lr = fl.linkrev(i) renamed = fl.renamed(fl.node(i)) rcache[fn][lr] = renamed if lr >= endrev: break if rev in rcache[fn]: return rcache[fn][rev] # If linkrev != rev (i.e. rev not found in rcache) fallback to # filectx logic. try: return repo[rev][fn].renamed() except error.LookupError: return None return getrenamed def showauthor(repo, ctx, templ, **args): """:author: String. The unmodified author of the changeset.""" return ctx.user() def showbisect(repo, ctx, templ, **args): """:bisect: String. The changeset bisection status.""" return hbisect.label(repo, ctx.node()) def showbranch(**args): """:branch: String. The name of the branch on which the changeset was committed. """ return args['ctx'].branch() def showbranches(**args): """:branches: List of strings. The name of the branch on which the changeset was committed. Will be empty if the branch name was default. """ branch = args['ctx'].branch() if branch != 'default': return showlist('branch', [branch], plural='branches', **args) return showlist('branch', [], plural='branches', **args) def showbookmarks(**args): """:bookmarks: List of strings. Any bookmarks associated with the changeset. """ repo = args['ctx']._repo bookmarks = args['ctx'].bookmarks() current = repo._bookmarkcurrent makemap = lambda v: {'bookmark': v, 'current': current} f = _showlist('bookmark', bookmarks, **args) return _hybrid(f, bookmarks, makemap, lambda x: x['bookmark']) def showchildren(**args): """:children: List of strings. The children of the changeset.""" ctx = args['ctx'] childrevs = ['%d:%s' % (cctx, cctx) for cctx in ctx.children()] return showlist('children', childrevs, element='child', **args) def showcurrentbookmark(**args): """:currentbookmark: String. The active bookmark, if it is associated with the changeset""" import bookmarks as bookmarks # to avoid circular import issues repo = args['repo'] if bookmarks.iscurrent(repo): current = repo._bookmarkcurrent if current in args['ctx'].bookmarks(): return current return '' def showdate(repo, ctx, templ, **args): """:date: Date information. The date when the changeset was committed.""" return ctx.date() def showdescription(repo, ctx, templ, **args): """:desc: String. The text of the changeset description.""" return ctx.description().strip() def showdiffstat(repo, ctx, templ, **args): """:diffstat: String. Statistics of changes with the following format: "modified files: +added/-removed lines" """ stats = patch.diffstatdata(util.iterlines(ctx.diff())) maxname, maxtotal, adds, removes, binary = patch.diffstatsum(stats) return '%s: +%s/-%s' % (len(stats), adds, removes) def showextras(**args): """:extras: List of dicts with key, value entries of the 'extras' field of this changeset.""" extras = args['ctx'].extra() extras = util.sortdict((k, extras[k]) for k in sorted(extras)) makemap = lambda k: {'key': k, 'value': extras[k]} c = [makemap(k) for k in extras] f = _showlist('extra', c, plural='extras', **args) return _hybrid(f, extras, makemap, lambda x: '%s=%s' % (x['key'], x['value'])) def showfileadds(**args): """:file_adds: List of strings. Files added by this changeset.""" repo, ctx, revcache = args['repo'], args['ctx'], args['revcache'] return showlist('file_add', getfiles(repo, ctx, revcache)[1], element='file', **args) def showfilecopies(**args): """:file_copies: List of strings. Files copied in this changeset with their sources. """ cache, ctx = args['cache'], args['ctx'] copies = args['revcache'].get('copies') if copies is None: if 'getrenamed' not in cache: cache['getrenamed'] = getrenamedfn(args['repo']) copies = [] getrenamed = cache['getrenamed'] for fn in ctx.files(): rename = getrenamed(fn, ctx.rev()) if rename: copies.append((fn, rename[0])) copies = util.sortdict(copies) makemap = lambda k: {'name': k, 'source': copies[k]} c = [makemap(k) for k in copies] f = _showlist('file_copy', c, plural='file_copies', **args) return _hybrid(f, copies, makemap, lambda x: '%s (%s)' % (x['name'], x['source'])) # showfilecopiesswitch() displays file copies only if copy records are # provided before calling the templater, usually with a --copies # command line switch. def showfilecopiesswitch(**args): """:file_copies_switch: List of strings. Like "file_copies" but displayed only if the --copied switch is set. """ copies = args['revcache'].get('copies') or [] copies = util.sortdict(copies) makemap = lambda k: {'name': k, 'source': copies[k]} c = [makemap(k) for k in copies] f = _showlist('file_copy', c, plural='file_copies', **args) return _hybrid(f, copies, makemap, lambda x: '%s (%s)' % (x['name'], x['source'])) def showfiledels(**args): """:file_dels: List of strings. Files removed by this changeset.""" repo, ctx, revcache = args['repo'], args['ctx'], args['revcache'] return showlist('file_del', getfiles(repo, ctx, revcache)[2], element='file', **args) def showfilemods(**args): """:file_mods: List of strings. Files modified by this changeset.""" repo, ctx, revcache = args['repo'], args['ctx'], args['revcache'] return showlist('file_mod', getfiles(repo, ctx, revcache)[0], element='file', **args) def showfiles(**args): """:files: List of strings. All files modified, added, or removed by this changeset. """ return showlist('file', args['ctx'].files(), **args) def showlatesttag(repo, ctx, templ, cache, **args): """:latesttag: String. Most recent global tag in the ancestors of this changeset. """ return getlatesttags(repo, ctx, cache)[2] def showlatesttagdistance(repo, ctx, templ, cache, **args): """:latesttagdistance: Integer. Longest path to the latest tag.""" return getlatesttags(repo, ctx, cache)[1] def showmanifest(**args): repo, ctx, templ = args['repo'], args['ctx'], args['templ'] mnode = ctx.manifestnode() args = args.copy() args.update({'rev': repo.manifest.rev(mnode), 'node': hex(mnode)}) return templ('manifest', **args) def shownode(repo, ctx, templ, **args): """:node: String. The changeset identification hash, as a 40 hexadecimal digit string. """ return ctx.hex() def showp1rev(repo, ctx, templ, **args): """:p1rev: Integer. The repository-local revision number of the changeset's first parent, or -1 if the changeset has no parents.""" return ctx.p1().rev() def showp2rev(repo, ctx, templ, **args): """:p2rev: Integer. The repository-local revision number of the changeset's second parent, or -1 if the changeset has no second parent.""" return ctx.p2().rev() def showp1node(repo, ctx, templ, **args): """:p1node: String. The identification hash of the changeset's first parent, as a 40 digit hexadecimal string. If the changeset has no parents, all digits are 0.""" return ctx.p1().hex() def showp2node(repo, ctx, templ, **args): """:p2node: String. The identification hash of the changeset's second parent, as a 40 digit hexadecimal string. If the changeset has no second parent, all digits are 0.""" return ctx.p2().hex() def showphase(repo, ctx, templ, **args): """:phase: String. The changeset phase name.""" return ctx.phasestr() def showphaseidx(repo, ctx, templ, **args): """:phaseidx: Integer. The changeset phase index.""" return ctx.phase() def showrev(repo, ctx, templ, **args): """:rev: Integer. The repository-local changeset revision number.""" return ctx.rev() def showsubrepos(**args): """:subrepos: List of strings. Updated subrepositories in the changeset.""" ctx = args['ctx'] substate = ctx.substate if not substate: return showlist('subrepo', [], **args) psubstate = ctx.parents()[0].substate or {} subrepos = [] for sub in substate: if sub not in psubstate or substate[sub] != psubstate[sub]: subrepos.append(sub) # modified or newly added in ctx for sub in psubstate: if sub not in substate: subrepos.append(sub) # removed in ctx return showlist('subrepo', sorted(subrepos), **args) def shownames(namespace, **args): """helper method to generate a template keyword for a namespace""" ctx = args['ctx'] repo = ctx.repo() ns = repo.names[namespace] names = ns.names(repo, ctx.node()) return showlist(ns.templatename, names, plural=namespace, **args) # don't remove "showtags" definition, even though namespaces will put # a helper function for "tags" keyword into "keywords" map automatically, # because online help text is built without namespaces initialization def showtags(**args): """:tags: List of strings. Any tags associated with the changeset.""" return shownames('tags', **args) # keywords are callables like: # fn(repo, ctx, templ, cache, revcache, **args) # with: # repo - current repository instance # ctx - the changectx being displayed # templ - the templater instance # cache - a cache dictionary for the whole templater run # revcache - a cache dictionary for the current revision keywords = { 'author': showauthor, 'bisect': showbisect, 'branch': showbranch, 'branches': showbranches, 'bookmarks': showbookmarks, 'children': showchildren, 'currentbookmark': showcurrentbookmark, 'date': showdate, 'desc': showdescription, 'diffstat': showdiffstat, 'extras': showextras, 'file_adds': showfileadds, 'file_copies': showfilecopies, 'file_copies_switch': showfilecopiesswitch, 'file_dels': showfiledels, 'file_mods': showfilemods, 'files': showfiles, 'latesttag': showlatesttag, 'latesttagdistance': showlatesttagdistance, 'manifest': showmanifest, 'node': shownode, 'p1rev': showp1rev, 'p1node': showp1node, 'p2rev': showp2rev, 'p2node': showp2node, 'phase': showphase, 'phaseidx': showphaseidx, 'rev': showrev, 'subrepos': showsubrepos, 'tags': showtags, } def _showparents(**args): """:parents: List of strings. The parents of the changeset in "rev:node" format. If the changeset has only one "natural" parent (the predecessor revision) nothing is shown.""" pass dockeywords = { 'parents': _showparents, } dockeywords.update(keywords) del dockeywords['branches'] # tell hggettext to extract docstrings from these functions: i18nfunctions = dockeywords.values()