Mercurial > hg
view mercurial/templater.py @ 15711:c51c9dc13a58
cygwin: add cygwin specific normcase logic
in cygwin environment, mount point part of path is treated as case
sensitive, even though underlying NTFS is case insensitive.
this patch preserves mount point part of specified path, only if it is
absolute one.
there is no easy way to get list of current mount points from python
program, other than to execute "mount" external command, because
cygwin does not store current mount points into Unix/Linux like
/etc/XXXtab file.
so, this patch introduces cygwinmountpoints variable to list mount
points to be preserved case.
this allows some other extensions to customize mount point
configuration.
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
---|---|
date | Fri, 16 Dec 2011 21:21:08 +0900 |
parents | e2c413bde8a5 |
children | 67964cda8701 |
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# templater.py - template expansion for output # # Copyright 2005, 2006 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 i18n import _ import sys, os import util, config, templatefilters, parser, error # template parsing elements = { "(": (20, ("group", 1, ")"), ("func", 1, ")")), ",": (2, None, ("list", 2)), "|": (5, None, ("|", 5)), "%": (6, None, ("%", 6)), ")": (0, None, None), "symbol": (0, ("symbol",), None), "string": (0, ("string",), None), "end": (0, None, None), } def tokenizer(data): program, start, end = data pos = start while pos < end: c = program[pos] if c.isspace(): # skip inter-token whitespace pass elif c in "(,)%|": # handle simple operators yield (c, None, pos) elif (c in '"\'' or c == 'r' and program[pos:pos + 2] in ("r'", 'r"')): # handle quoted strings if c == 'r': pos += 1 c = program[pos] decode = lambda x: x else: decode = lambda x: x.decode('string-escape') pos += 1 s = pos while pos < end: # find closing quote d = program[pos] if d == '\\': # skip over escaped characters pos += 2 continue if d == c: yield ('string', decode(program[s:pos]), s) break pos += 1 else: raise error.ParseError(_("unterminated string"), s) elif c.isalnum() or c in '_': s = pos pos += 1 while pos < end: # find end of symbol d = program[pos] if not (d.isalnum() or d == "_"): break pos += 1 sym = program[s:pos] yield ('symbol', sym, s) pos -= 1 elif c == '}': pos += 1 break else: raise error.ParseError(_("syntax error"), pos) pos += 1 yield ('end', None, pos) def compiletemplate(tmpl, context): parsed = [] pos, stop = 0, len(tmpl) p = parser.parser(tokenizer, elements) while pos < stop: n = tmpl.find('{', pos) if n < 0: parsed.append(("string", tmpl[pos:])) break if n > 0 and tmpl[n - 1] == '\\': # escaped parsed.append(("string", tmpl[pos:n - 1] + "{")) pos = n + 1 continue if n > pos: parsed.append(("string", tmpl[pos:n])) pd = [tmpl, n + 1, stop] parseres, pos = p.parse(pd) parsed.append(parseres) return [compileexp(e, context) for e in parsed] def compileexp(exp, context): t = exp[0] if t in methods: return methods[t](exp, context) raise error.ParseError(_("unknown method '%s'") % t) # template evaluation def getsymbol(exp): if exp[0] == 'symbol': return exp[1] raise error.ParseError(_("expected a symbol")) def getlist(x): if not x: return [] if x[0] == 'list': return getlist(x[1]) + [x[2]] return [x] def getfilter(exp, context): f = getsymbol(exp) if f not in context._filters: raise error.ParseError(_("unknown function '%s'") % f) return context._filters[f] def gettemplate(exp, context): if exp[0] == 'string': return compiletemplate(exp[1], context) if exp[0] == 'symbol': return context._load(exp[1]) raise error.ParseError(_("expected template specifier")) def runstring(context, mapping, data): return data def runsymbol(context, mapping, key): v = mapping.get(key) if v is None: v = context._defaults.get(key, '') if util.safehasattr(v, '__call__'): return v(**mapping) return v def buildfilter(exp, context): func, data = compileexp(exp[1], context) filt = getfilter(exp[2], context) return (runfilter, (func, data, filt)) def runfilter(context, mapping, data): func, data, filt = data return filt(func(context, mapping, data)) def buildmap(exp, context): func, data = compileexp(exp[1], context) ctmpl = gettemplate(exp[2], context) return (runmap, (func, data, ctmpl)) def runmap(context, mapping, data): func, data, ctmpl = data d = func(context, mapping, data) lm = mapping.copy() for i in d: if isinstance(i, dict): lm.update(i) for f, d in ctmpl: yield f(context, lm, d) else: # v is not an iterable of dicts, this happen when 'key' # has been fully expanded already and format is useless. # If so, return the expanded value. yield i def buildfunc(exp, context): n = getsymbol(exp[1]) args = [compileexp(x, context) for x in getlist(exp[2])] if n in funcs: f = funcs[n] return (f, args) if n in context._filters: if len(args) != 1: raise error.ParseError(_("filter %s expects one argument") % n) f = context._filters[n] return (runfilter, (args[0][0], args[0][1], f)) methods = { "string": lambda e, c: (runstring, e[1]), "symbol": lambda e, c: (runsymbol, e[1]), "group": lambda e, c: compileexp(e[1], c), # ".": buildmember, "|": buildfilter, "%": buildmap, "func": buildfunc, } funcs = { } # template engine path = ['templates', '../templates'] stringify = templatefilters.stringify def _flatten(thing): '''yield a single stream from a possibly nested set of iterators''' if isinstance(thing, str): yield thing elif not util.safehasattr(thing, '__iter__'): if thing is not None: yield str(thing) else: for i in thing: if isinstance(i, str): yield i elif not util.safehasattr(i, '__iter__'): if i is not None: yield str(i) elif i is not None: for j in _flatten(i): yield j def parsestring(s, quoted=True): '''parse a string using simple c-like syntax. string must be in quotes if quoted is True.''' if quoted: if len(s) < 2 or s[0] != s[-1]: raise SyntaxError(_('unmatched quotes')) return s[1:-1].decode('string_escape') return s.decode('string_escape') class engine(object): '''template expansion engine. template expansion works like this. a map file contains key=value pairs. if value is quoted, it is treated as string. otherwise, it is treated as name of template file. templater is asked to expand a key in map. it looks up key, and looks for strings like this: {foo}. it expands {foo} by looking up foo in map, and substituting it. expansion is recursive: it stops when there is no more {foo} to replace. expansion also allows formatting and filtering. format uses key to expand each item in list. syntax is {key%format}. filter uses function to transform value. syntax is {key|filter1|filter2|...}.''' def __init__(self, loader, filters={}, defaults={}): self._loader = loader self._filters = filters self._defaults = defaults self._cache = {} def _load(self, t): '''load, parse, and cache a template''' if t not in self._cache: self._cache[t] = compiletemplate(self._loader(t), self) return self._cache[t] def process(self, t, mapping): '''Perform expansion. t is name of map element to expand. mapping contains added elements for use during expansion. Is a generator.''' return _flatten(func(self, mapping, data) for func, data in self._load(t)) engines = {'default': engine} class templater(object): def __init__(self, mapfile, filters={}, defaults={}, cache={}, minchunk=1024, maxchunk=65536): '''set up template engine. mapfile is name of file to read map definitions from. filters is dict of functions. each transforms a value into another. defaults is dict of default map definitions.''' self.mapfile = mapfile or 'template' self.cache = cache.copy() self.map = {} self.base = (mapfile and os.path.dirname(mapfile)) or '' self.filters = templatefilters.filters.copy() self.filters.update(filters) self.defaults = defaults self.minchunk, self.maxchunk = minchunk, maxchunk self.ecache = {} if not mapfile: return if not os.path.exists(mapfile): raise util.Abort(_('style not found: %s') % mapfile) conf = config.config() conf.read(mapfile) for key, val in conf[''].items(): if val[0] in "'\"": try: self.cache[key] = parsestring(val) except SyntaxError, inst: raise SyntaxError('%s: %s' % (conf.source('', key), inst.args[0])) else: val = 'default', val if ':' in val[1]: val = val[1].split(':', 1) self.map[key] = val[0], os.path.join(self.base, val[1]) def __contains__(self, key): return key in self.cache or key in self.map def load(self, t): '''Get the template for the given template name. Use a local cache.''' if not t in self.cache: try: self.cache[t] = util.readfile(self.map[t][1]) except KeyError, inst: raise util.Abort(_('"%s" not in template map') % inst.args[0]) except IOError, inst: raise IOError(inst.args[0], _('template file %s: %s') % (self.map[t][1], inst.args[1])) return self.cache[t] def __call__(self, t, **mapping): ttype = t in self.map and self.map[t][0] or 'default' if ttype not in self.ecache: self.ecache[ttype] = engines[ttype](self.load, self.filters, self.defaults) proc = self.ecache[ttype] stream = proc.process(t, mapping) if self.minchunk: stream = util.increasingchunks(stream, min=self.minchunk, max=self.maxchunk) return stream def templatepath(name=None): '''return location of template file or directory (if no name). returns None if not found.''' normpaths = [] # executable version (py2exe) doesn't support __file__ if util.mainfrozen(): module = sys.executable else: module = __file__ for f in path: if f.startswith('/'): p = f else: fl = f.split('/') p = os.path.join(os.path.dirname(module), *fl) if name: p = os.path.join(p, name) if name and os.path.exists(p): return os.path.normpath(p) elif os.path.isdir(p): normpaths.append(os.path.normpath(p)) return normpaths def stylemap(styles, paths=None): """Return path to mapfile for a given style. Searches mapfile in the following locations: 1. templatepath/style/map 2. templatepath/map-style 3. templatepath/map """ if paths is None: paths = templatepath() elif isinstance(paths, str): paths = [paths] if isinstance(styles, str): styles = [styles] for style in styles: if not style: continue locations = [os.path.join(style, 'map'), 'map-' + style] locations.append('map') for path in paths: for location in locations: mapfile = os.path.join(path, location) if os.path.isfile(mapfile): return style, mapfile raise RuntimeError("No hgweb templates found in %r" % paths)