mercurial/templateutil.py

36920:6ff6e1d6b5b8

from .i18n import _
from . import (
    error,
    pycompat,
    templatekw,
    util,
)

class ResourceUnavailable(error.Abort):
    pass

class TemplateNotFound(error.Abort):
    pass

def stringify(thing):
    """Turn values into bytes by converting into text and concatenating them"""
    thing = templatekw.unwraphybrid(thing)
    if util.safehasattr(thing, '__iter__') and not isinstance(thing, bytes):
        if isinstance(thing, str):
            # This is only reachable on Python 3 (otherwise
            # isinstance(thing, bytes) would have been true), and is
            # here to prevent infinite recursion bugs on Python 3.

    return func(context, mapping, data)

def evalfuncarg(context, mapping, arg):
    """Evaluate given argument as value type"""
    thing = evalrawexp(context, mapping, arg)
    thing = templatekw.unwrapvalue(thing)
    # evalrawexp() may return string, generator of strings or arbitrary object
    # such as date tuple, but filter does not want generator.
    if isinstance(thing, types.GeneratorType):
        thing = stringify(thing)
    return thing

        if thing is None:
            # not a template keyword, takes as a boolean literal
            thing = util.parsebool(data)
    else:
        thing = func(context, mapping, data)
    thing = templatekw.unwrapvalue(thing)
    if isinstance(thing, bool):
        return thing
    # other objects are evaluated as strings, which means 0 is True, but
    # empty dict/list should be False as they are expected to be ''
    return bool(stringify(thing))

def getdictitem(dictarg, key):
    val = dictarg.get(key)
    if val is None:
        return
    return templatekw.wraphybridvalue(dictarg, key, val)

36921:32f9b7e3f056

from .i18n import _
from . import (
    error,
    pycompat,
    util,
)

class ResourceUnavailable(error.Abort):
    pass

class TemplateNotFound(error.Abort):
    pass

class hybrid(object):
    """Wrapper for list or dict to support legacy template

    This 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)}"
    - "{files|json}"
    """

    def __init__(self, gen, values, makemap, joinfmt, keytype=None):
        if gen is not None:
            self.gen = gen  # generator or function returning generator
        self._values = values
        self._makemap = makemap
        self.joinfmt = joinfmt
        self.keytype = keytype  # hint for 'x in y' where type(x) is unresolved
    def gen(self):
        """Default generator to stringify this as {join(self, ' ')}"""
        for i, x in enumerate(self._values):
            if i > 0:
                yield ' '
            yield self.joinfmt(x)
    def itermaps(self):
        makemap = self._makemap
        for x in self._values:
            yield makemap(x)
    def __contains__(self, x):
        return x in self._values
    def __getitem__(self, key):
        return self._values[key]
    def __len__(self):
        return len(self._values)
    def __iter__(self):
        return iter(self._values)
    def __getattr__(self, name):
        if name not in (r'get', r'items', r'iteritems', r'iterkeys',
                        r'itervalues', r'keys', r'values'):
            raise AttributeError(name)
        return getattr(self._values, name)

class mappable(object):
    """Wrapper for non-list/dict object to support map operation

    This class allows us to handle both:
    - "{manifest}"
    - "{manifest % '{rev}:{node}'}"
    - "{manifest.rev}"

    Unlike a hybrid, this does not simulate the behavior of the underling
    value. Use unwrapvalue() or unwraphybrid() to obtain the inner object.
    """

    def __init__(self, gen, key, value, makemap):
        if gen is not None:
            self.gen = gen  # generator or function returning generator
        self._key = key
        self._value = value  # may be generator of strings
        self._makemap = makemap

    def gen(self):
        yield pycompat.bytestr(self._value)

    def tomap(self):
        return self._makemap(self._key)

    def itermaps(self):
        yield self.tomap()

def hybriddict(data, key='key', value='value', fmt=None, gen=None):
    """Wrap data to support both dict-like and string-like operations"""
    prefmt = pycompat.identity
    if fmt is None:
        fmt = '%s=%s'
        prefmt = pycompat.bytestr
    return hybrid(gen, data, lambda k: {key: k, value: data[k]},
                  lambda k: fmt % (prefmt(k), prefmt(data[k])))

def hybridlist(data, name, fmt=None, gen=None):
    """Wrap data to support both list-like and string-like operations"""
    prefmt = pycompat.identity
    if fmt is None:
        fmt = '%s'
        prefmt = pycompat.bytestr
    return hybrid(gen, data, lambda x: {name: x}, lambda x: fmt % prefmt(x))

def unwraphybrid(thing):
    """Return an object which can be stringified possibly by using a legacy
    template"""
    gen = getattr(thing, 'gen', None)
    if gen is None:
        return thing
    if callable(gen):
        return gen()
    return gen

def unwrapvalue(thing):
    """Move the inner value object out of the wrapper"""
    if not util.safehasattr(thing, '_value'):
        return thing
    return thing._value

def wraphybridvalue(container, key, value):
    """Wrap an element of hybrid container to be mappable

    The key is passed to the makemap function of the given container, which
    should be an item generated by iter(container).
    """
    makemap = getattr(container, '_makemap', None)
    if makemap is None:
        return value
    if util.safehasattr(value, '_makemap'):
        # a nested hybrid list/dict, which has its own way of map operation
        return value
    return mappable(None, key, value, makemap)

def compatdict(context, mapping, name, data, key='key', value='value',
               fmt=None, plural=None, separator=' '):
    """Wrap data like hybriddict(), but also supports old-style list template

    This exists for backward compatibility with the old-style template. Use
    hybriddict() for new template keywords.
    """
    c = [{key: k, value: v} for k, v in data.iteritems()]
    t = context.resource(mapping, 'templ')
    f = _showlist(name, c, t, mapping, plural, separator)
    return hybriddict(data, key=key, value=value, fmt=fmt, gen=f)

def compatlist(context, mapping, name, data, element=None, fmt=None,
               plural=None, separator=' '):
    """Wrap data like hybridlist(), but also supports old-style list template

    This exists for backward compatibility with the old-style template. Use
    hybridlist() for new template keywords.
    """
    t = context.resource(mapping, 'templ')
    f = _showlist(name, data, t, mapping, plural, separator)
    return hybridlist(data, name=element or name, fmt=fmt, gen=f)

def _showlist(name, values, templ, mapping, plural=None, separator=' '):
    '''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'.
    separator is used to join values as a string

    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 'separator'.

    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'.
    '''
    strmapping = pycompat.strkwargs(mapping)
    if not plural:
        plural = name + 's'
    if not values:
        noname = 'no_' + plural
        if noname in templ:
            yield templ(noname, **strmapping)
        return
    if name not in templ:
        if isinstance(values[0], bytes):
            yield separator.join(values)
        else:
            for v in values:
                r = dict(v)
                r.update(mapping)
                yield r
        return
    startname = 'start_' + plural
    if startname in templ:
        yield templ(startname, **strmapping)
    vmapping = mapping.copy()
    def one(v, tag=name):
        try:
            vmapping.update(v)
        # Python 2 raises ValueError if the type of v is wrong. Python
        # 3 raises TypeError.
        except (AttributeError, TypeError, ValueError):
            try:
                # Python 2 raises ValueError trying to destructure an e.g.
                # bytes. Python 3 raises TypeError.
                for a, b in v:
                    vmapping[a] = b
            except (TypeError, ValueError):
                vmapping[name] = v
        return templ(tag, **pycompat.strkwargs(vmapping))
    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_' + plural
    if endname in templ:
        yield templ(endname, **strmapping)

def stringify(thing):
    """Turn values into bytes by converting into text and concatenating them"""
    thing = unwraphybrid(thing)
    if util.safehasattr(thing, '__iter__') and not isinstance(thing, bytes):
        if isinstance(thing, str):
            # This is only reachable on Python 3 (otherwise
            # isinstance(thing, bytes) would have been true), and is
            # here to prevent infinite recursion bugs on Python 3.

    return func(context, mapping, data)

def evalfuncarg(context, mapping, arg):
    """Evaluate given argument as value type"""
    thing = evalrawexp(context, mapping, arg)
    thing = unwrapvalue(thing)
    # evalrawexp() may return string, generator of strings or arbitrary object
    # such as date tuple, but filter does not want generator.
    if isinstance(thing, types.GeneratorType):
        thing = stringify(thing)
    return thing

        if thing is None:
            # not a template keyword, takes as a boolean literal
            thing = util.parsebool(data)
    else:
        thing = func(context, mapping, data)
    thing = unwrapvalue(thing)
    if isinstance(thing, bool):
        return thing
    # other objects are evaluated as strings, which means 0 is True, but
    # empty dict/list should be False as they are expected to be ''
    return bool(stringify(thing))

def getdictitem(dictarg, key):
    val = dictarg.get(key)
    if val is None:
        return
    return wraphybridvalue(dictarg, key, val)