comparison mercurial/templater.py @ 31927:2abc556dbe92

templater: find keyword name more thoroughly on filtering error

Before, it could spill an internal representation of compiled template such
as [(<function runsymbol at 0x....>, 'extras'), ...]. Show less cryptic
message if no symbol found.

New findsymbolicname() function will be also used by dict() constructor.

31926:932241b8c644

        # even if it exists in mapping. this allows us to override mapping
        # by web templates, e.g. 'changelogtag' is redefined in map file.
        return context._load(exp[1])
    raise error.ParseError(_("expected template specifier"))

def evalfuncarg(context, mapping, arg):
    func, data = arg
    # func() may return string, generator of strings or arbitrary object such
    # as date tuple, but filter does not want generator.
    thing = func(context, mapping, data)

    arg, filt = data
    thing = evalfuncarg(context, mapping, arg)
    try:
        return filt(thing)
    except (ValueError, AttributeError, TypeError):
        if isinstance(arg[1], tuple):
            dt = arg[1][1]
        else:
            dt = arg[1]
        raise error.Abort(_("template filter '%s' is not compatible with "
                           "keyword '%s'") % (filt.func_name, dt))

def buildmap(exp, context):
    func, data = compileexp(exp[1], context, methods)
    tfunc, tdata = gettemplate(exp[2], context)
    return (runmap, (func, data, tfunc, tdata))

31927:2abc556dbe92

        # even if it exists in mapping. this allows us to override mapping
        # by web templates, e.g. 'changelogtag' is redefined in map file.
        return context._load(exp[1])
    raise error.ParseError(_("expected template specifier"))

def findsymbolicname(arg):
    """Find symbolic name for the given compiled expression; returns None
    if nothing found reliably"""
    while True:
        func, data = arg
        if func is runsymbol:
            return data
        elif func is runfilter:
            arg = data[0]
        else:
            return None

def evalfuncarg(context, mapping, arg):
    func, data = arg
    # func() may return string, generator of strings or arbitrary object such
    # as date tuple, but filter does not want generator.
    thing = func(context, mapping, data)

    arg, filt = data
    thing = evalfuncarg(context, mapping, arg)
    try:
        return filt(thing)
    except (ValueError, AttributeError, TypeError):
        sym = findsymbolicname(arg)
        if sym:
            msg = (_("template filter '%s' is not compatible with keyword '%s'")
                   % (filt.func_name, sym))
        else:
            msg = _("incompatible use of template filter '%s'") % filt.func_name
        raise error.Abort(msg)

def buildmap(exp, context):
    func, data = compileexp(exp[1], context, methods)
    tfunc, tdata = gettemplate(exp[2], context)
    return (runmap, (func, data, tfunc, tdata))