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# templater.py - template expansion for output
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#
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# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
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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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from i18n import _
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import sys, os, re
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import util, config, templatefilters, parser, error
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import types
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import minirst
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# template parsing
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elements = {
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"(": (20, ("group", 1, ")"), ("func", 1, ")")),
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",": (2, None, ("list", 2)),
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"|": (5, None, ("|", 5)),
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"%": (6, None, ("%", 6)),
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")": (0, None, None),
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"symbol": (0, ("symbol",), None),
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"string": (0, ("string",), None),
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"end": (0, None, None),
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}
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def tokenizer(data):
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program, start, end = data
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pos = start
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while pos < end:
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c = program[pos]
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if c.isspace(): # skip inter-token whitespace
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pass
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elif c in "(,)%|": # handle simple operators
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yield (c, None, pos)
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elif (c in '"\'' or c == 'r' and
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program[pos:pos + 2] in ("r'", 'r"')): # handle quoted strings
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if c == 'r':
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pos += 1
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c = program[pos]
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decode = False
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else:
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decode = True
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pos += 1
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s = pos
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while pos < end: # find closing quote
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d = program[pos]
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if decode and d == '\\': # skip over escaped characters
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pos += 2
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continue
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if d == c:
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if not decode:
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yield ('string', program[s:pos].replace('\\', r'\\'), s)
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break
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yield ('string', program[s:pos].decode('string-escape'), s)
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break
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pos += 1
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else:
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raise error.ParseError(_("unterminated string"), s)
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elif c.isalnum() or c in '_':
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s = pos
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pos += 1
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while pos < end: # find end of symbol
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d = program[pos]
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if not (d.isalnum() or d == "_"):
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break
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pos += 1
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sym = program[s:pos]
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yield ('symbol', sym, s)
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pos -= 1
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elif c == '}':
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pos += 1
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break
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else:
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raise error.ParseError(_("syntax error"), pos)
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pos += 1
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yield ('end', None, pos)
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def compiletemplate(tmpl, context):
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parsed = []
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pos, stop = 0, len(tmpl)
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p = parser.parser(tokenizer, elements)
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while pos < stop:
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n = tmpl.find('{', pos)
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if n < 0:
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parsed.append(("string", tmpl[pos:]))
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break
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if n > 0 and tmpl[n - 1] == '\\':
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# escaped
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parsed.append(("string", tmpl[pos:n - 1] + "{"))
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pos = n + 1
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continue
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if n > pos:
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parsed.append(("string", tmpl[pos:n]))
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pd = [tmpl, n + 1, stop]
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parseres, pos = p.parse(pd)
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parsed.append(parseres)
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return [compileexp(e, context) for e in parsed]
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def compileexp(exp, context):
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t = exp[0]
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if t in methods:
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return methods[t](exp, context)
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raise error.ParseError(_("unknown method '%s'") % t)
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# template evaluation
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def getsymbol(exp):
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if exp[0] == 'symbol':
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return exp[1]
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raise error.ParseError(_("expected a symbol"))
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def getlist(x):
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if not x:
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return []
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if x[0] == 'list':
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return getlist(x[1]) + [x[2]]
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return [x]
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def getfilter(exp, context):
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f = getsymbol(exp)
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if f not in context._filters:
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raise error.ParseError(_("unknown function '%s'") % f)
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return context._filters[f]
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def gettemplate(exp, context):
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if exp[0] == 'string':
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return compiletemplate(exp[1], context)
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if exp[0] == 'symbol':
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return context._load(exp[1])
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raise error.ParseError(_("expected template specifier"))
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def runstring(context, mapping, data):
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return data
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def runsymbol(context, mapping, key):
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v = mapping.get(key)
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if v is None:
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v = context._defaults.get(key)
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if v is None:
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try:
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v = context.process(key, mapping)
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except TemplateNotFound:
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v = ''
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if util.safehasattr(v, '__call__'):
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return v(**mapping)
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if isinstance(v, types.GeneratorType):
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v = list(v)
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mapping[key] = v
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return v
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return v
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def buildfilter(exp, context):
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func, data = compileexp(exp[1], context)
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filt = getfilter(exp[2], context)
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return (runfilter, (func, data, filt))
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def runfilter(context, mapping, data):
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func, data, filt = data
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try:
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return filt(func(context, mapping, data))
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except (ValueError, AttributeError, TypeError):
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if isinstance(data, tuple):
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dt = data[1]
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else:
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dt = data
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raise util.Abort(_("template filter '%s' is not compatible with "
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"keyword '%s'") % (filt.func_name, dt))
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def buildmap(exp, context):
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func, data = compileexp(exp[1], context)
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ctmpl = gettemplate(exp[2], context)
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return (runmap, (func, data, ctmpl))
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def runtemplate(context, mapping, template):
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for func, data in template:
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yield func(context, mapping, data)
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def runmap(context, mapping, data):
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func, data, ctmpl = data
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d = func(context, mapping, data)
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if util.safehasattr(d, '__call__'):
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d = d()
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lm = mapping.copy()
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for i in d:
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if isinstance(i, dict):
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lm.update(i)
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lm['originalnode'] = mapping.get('node')
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yield runtemplate(context, lm, ctmpl)
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else:
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# v is not an iterable of dicts, this happen when 'key'
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# has been fully expanded already and format is useless.
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# If so, return the expanded value.
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yield i
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def buildfunc(exp, context):
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n = getsymbol(exp[1])
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args = [compileexp(x, context) for x in getlist(exp[2])]
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if n in funcs:
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f = funcs[n]
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return (f, args)
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if n in context._filters:
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if len(args) != 1:
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raise error.ParseError(_("filter %s expects one argument") % n)
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f = context._filters[n]
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return (runfilter, (args[0][0], args[0][1], f))
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def date(context, mapping, args):
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if not (1 <= len(args) <= 2):
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raise error.ParseError(_("date expects one or two arguments"))
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date = args[0][0](context, mapping, args[0][1])
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if len(args) == 2:
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fmt = stringify(args[1][0](context, mapping, args[1][1]))
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return util.datestr(date, fmt)
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return util.datestr(date)
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def fill(context, mapping, args):
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if not (1 <= len(args) <= 4):
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raise error.ParseError(_("fill expects one to four arguments"))
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text = stringify(args[0][0](context, mapping, args[0][1]))
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width = 76
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initindent = ''
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hangindent = ''
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if 2 <= len(args) <= 4:
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try:
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width = int(stringify(args[1][0](context, mapping, args[1][1])))
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except ValueError:
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raise error.ParseError(_("fill expects an integer width"))
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try:
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initindent = stringify(args[2][0](context, mapping, args[2][1]))
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initindent = stringify(runtemplate(context, mapping,
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compiletemplate(initindent, context)))
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hangindent = stringify(args[3][0](context, mapping, args[3][1]))
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hangindent = stringify(runtemplate(context, mapping,
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compiletemplate(hangindent, context)))
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except IndexError:
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pass
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return templatefilters.fill(text, width, initindent, hangindent)
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def get(context, mapping, args):
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if len(args) != 2:
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# i18n: "get" is a keyword
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raise error.ParseError(_("get() expects two arguments"))
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dictarg = args[0][0](context, mapping, args[0][1])
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if not util.safehasattr(dictarg, 'get'):
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# i18n: "get" is a keyword
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raise error.ParseError(_("get() expects a dict as first argument"))
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key = args[1][0](context, mapping, args[1][1])
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yield dictarg.get(key)
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def if_(context, mapping, args):
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if not (2 <= len(args) <= 3):
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# i18n: "if" is a keyword
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raise error.ParseError(_("if expects two or three arguments"))
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test = stringify(args[0][0](context, mapping, args[0][1]))
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if test:
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t = stringify(args[1][0](context, mapping, args[1][1]))
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yield runtemplate(context, mapping, compiletemplate(t, context))
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elif len(args) == 3:
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t = stringify(args[2][0](context, mapping, args[2][1]))
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yield runtemplate(context, mapping, compiletemplate(t, context))
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def ifeq(context, mapping, args):
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if not (3 <= len(args) <= 4):
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# i18n: "ifeq" is a keyword
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raise error.ParseError(_("ifeq expects three or four arguments"))
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test = stringify(args[0][0](context, mapping, args[0][1]))
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match = stringify(args[1][0](context, mapping, args[1][1]))
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if test == match:
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t = stringify(args[2][0](context, mapping, args[2][1]))
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yield runtemplate(context, mapping, compiletemplate(t, context))
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elif len(args) == 4:
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t = stringify(args[3][0](context, mapping, args[3][1]))
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yield runtemplate(context, mapping, compiletemplate(t, context))
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def join(context, mapping, args):
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if not (1 <= len(args) <= 2):
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# i18n: "join" is a keyword
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raise error.ParseError(_("join expects one or two arguments"))
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joinset = args[0][0](context, mapping, args[0][1])
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if util.safehasattr(joinset, '__call__'):
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jf = joinset.joinfmt
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joinset = [jf(x) for x in joinset()]
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joiner = " "
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if len(args) > 1:
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joiner = args[1][0](context, mapping, args[1][1])
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first = True
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for x in joinset:
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if first:
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first = False
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else:
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yield joiner
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yield x
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def label(context, mapping, args):
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if len(args) != 2:
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# i18n: "label" is a keyword
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raise error.ParseError(_("label expects two arguments"))
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# ignore args[0] (the label string) since this is supposed to be a a no-op
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t = stringify(args[1][0](context, mapping, args[1][1]))
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yield runtemplate(context, mapping, compiletemplate(t, context))
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def rstdoc(context, mapping, args):
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if len(args) != 2:
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# i18n: "rstdoc" is a keyword
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raise error.ParseError(_("rstdoc expects two arguments"))
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text = stringify(args[0][0](context, mapping, args[0][1]))
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style = stringify(args[1][0](context, mapping, args[1][1]))
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return minirst.format(text, style=style, keep=['verbose'])
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def strip(context, mapping, args):
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if not (1 <= len(args) <= 2):
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raise error.ParseError(_("strip expects one or two arguments"))
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text = args[0][0](context, mapping, args[0][1])
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if len(args) == 2:
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chars = args[1][0](context, mapping, args[1][1])
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return text.strip(chars)
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return text.strip()
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def sub(context, mapping, args):
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if len(args) != 3:
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# i18n: "sub" is a keyword
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raise error.ParseError(_("sub expects three arguments"))
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pat = stringify(args[0][0](context, mapping, args[0][1]))
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rpl = stringify(args[1][0](context, mapping, args[1][1]))
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src = stringify(args[2][0](context, mapping, args[2][1]))
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src = stringify(runtemplate(context, mapping,
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compiletemplate(src, context)))
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yield re.sub(pat, rpl, src)
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methods = {
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"string": lambda e, c: (runstring, e[1]),
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"symbol": lambda e, c: (runsymbol, e[1]),
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"group": lambda e, c: compileexp(e[1], c),
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# ".": buildmember,
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"|": buildfilter,
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"%": buildmap,
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"func": buildfunc,
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}
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funcs = {
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"date": date,
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"fill": fill,
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"get": get,
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"if": if_,
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"ifeq": ifeq,
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"join": join,
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"label": label,
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"rstdoc": rstdoc,
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"strip": strip,
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"sub": sub,
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}
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# template engine
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path = ['templates', '../templates']
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stringify = templatefilters.stringify
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def _flatten(thing):
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'''yield a single stream from a possibly nested set of iterators'''
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if isinstance(thing, str):
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yield thing
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elif not util.safehasattr(thing, '__iter__'):
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if thing is not None:
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yield str(thing)
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else:
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for i in thing:
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if isinstance(i, str):
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yield i
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elif not util.safehasattr(i, '__iter__'):
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if i is not None:
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yield str(i)
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elif i is not None:
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for j in _flatten(i):
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yield j
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def parsestring(s, quoted=True):
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'''parse a string using simple c-like syntax.
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string must be in quotes if quoted is True.'''
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if quoted:
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if len(s) < 2 or s[0] != s[-1]:
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raise SyntaxError(_('unmatched quotes'))
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return s[1:-1].decode('string_escape')
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return s.decode('string_escape')
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class engine(object):
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'''template expansion engine.
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template expansion works like this. a map file contains key=value
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pairs. if value is quoted, it is treated as string. otherwise, it
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is treated as name of template file.
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templater is asked to expand a key in map. it looks up key, and
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looks for strings like this: {foo}. it expands {foo} by looking up
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foo in map, and substituting it. expansion is recursive: it stops
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when there is no more {foo} to replace.
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expansion also allows formatting and filtering.
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format uses key to expand each item in list. syntax is
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{key%format}.
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filter uses function to transform value. syntax is
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{key|filter1|filter2|...}.'''
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def __init__(self, loader, filters={}, defaults={}):
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self._loader = loader
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self._filters = filters
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self._defaults = defaults
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self._cache = {}
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def _load(self, t):
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'''load, parse, and cache a template'''
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if t not in self._cache:
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self._cache[t] = compiletemplate(self._loader(t), self)
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return self._cache[t]
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def process(self, t, mapping):
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|
'''Perform expansion. t is name of map element to expand.
|
|
|
mapping contains added elements for use during expansion. Is a
|
|
|
generator.'''
|
|
|
return _flatten(runtemplate(self, mapping, self._load(t)))
|
|
|
|
|
|
engines = {'default': engine}
|
|
|
|
|
|
def stylelist():
|
|
|
path = templatepath()[0]
|
|
|
dirlist = os.listdir(path)
|
|
|
stylelist = []
|
|
|
for file in dirlist:
|
|
|
split = file.split(".")
|
|
|
if split[0] == "map-cmdline":
|
|
|
stylelist.append(split[1])
|
|
|
return ", ".join(sorted(stylelist))
|
|
|
|
|
|
class TemplateNotFound(util.Abort):
|
|
|
pass
|
|
|
|
|
|
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 '%s' not found") % mapfile,
|
|
|
hint=_("available styles: %s") % stylelist())
|
|
|
|
|
|
conf = config.config()
|
|
|
conf.read(mapfile)
|
|
|
|
|
|
for key, val in conf[''].items():
|
|
|
if not val:
|
|
|
raise SyntaxError(_('%s: missing value') % conf.source('', key))
|
|
|
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 t not in self.cache:
|
|
|
try:
|
|
|
self.cache[t] = util.readfile(self.map[t][1])
|
|
|
except KeyError, inst:
|
|
|
raise TemplateNotFound(_('"%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)
|
|
|
|
