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templatekw: add new-style template expansion to {manifest}
The goal is to allow us to easily access to nested data. The dot operator
will be introduced later so we can write '{p1.files}' instead of
'{revset("p1()") % "{files}"}' for example.
In the example above, 'p1' needs to carry a mapping dict along with its
string representation. If it were a list or a dict, it could be wrapped
semi-transparently with the _hybrid class, but for non-list/dict types,
it would be difficult to proxy all necessary functions to underlying value
type because several core operations may conflict with the ones of the
underlying value:
- hash(value) should be different from hash(wrapped(value)), which means
dict[wrapped(value)] would be invalid
- 'value == wrapped(value)' would be false, breaks 'ifcontains'
- len(wrapped(value)) may be either len(value) or len(iter(wrapped(value)))
So the wrapper has no proxy functions and its scope designed to be minimal.
It's unwrapped at eval*() functions so we don't have to care for a wrapped
object unless it's really needed:
# most template functions just call evalfuncarg()
unwrapped_value = evalfuncarg(context, mapping, args[n])
# if wrapped value is needed, use evalrawexp()
maybe_wrapped_value = evalrawexp(context, mapping, args[n])
Another idea was to wrap every template variable with a tagging class, but
which seemed uneasy without a static type checker.
This patch updates {manifest} to a mappable as an example.
author | Yuya Nishihara <yuya@tcha.org> |
---|---|
date | Sun, 24 Apr 2016 18:41:23 +0900 |
parents | 18c6b271579b |
children | 4e4fae1dda5c |
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#!/usr/bin/env python # # runrst - register custom roles and run correct writer # # Copyright 2010 Matt Mackall <mpm@selenic.com> and others # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. """usage: %s WRITER args... where WRITER is the name of a Docutils writer such as 'html' or 'manpage' """ import sys try: from docutils.parsers.rst import roles from docutils.core import publish_cmdline from docutils import nodes, utils except ImportError: sys.stderr.write("abort: couldn't generate documentation: docutils " "module is missing\n") sys.stderr.write("please install python-docutils or see " "http://docutils.sourceforge.net/\n") sys.exit(-1) def role_hg(name, rawtext, text, lineno, inliner, options={}, content=[]): text = "hg " + utils.unescape(text) linktext = nodes.literal(rawtext, text) parts = text.split() cmd, args = parts[1], parts[2:] refuri = "hg.1.html#%s" % cmd if cmd == 'help' and args: if args[0] == 'config': # :hg:`help config` refuri = "hgrc.5.html" elif args[0].startswith('config.'): # :hg:`help config.SECTION...` refuri = "hgrc.5.html#%s" % args[0].split('.', 2)[1] elif len(args) >= 2 and args[0] == '-c': # :hg:`help -c COMMAND ...` is equivalent to :hg:`COMMAND` # (mainly for :hg:`help -c config`) refuri = "hg.1.html#%s" % args[1] else: refuri = "hg.1.html#%s" % args[0] node = nodes.reference(rawtext, '', linktext, refuri=refuri) return [node], [] roles.register_local_role("hg", role_hg) if __name__ == "__main__": if len(sys.argv) < 2: sys.stderr.write(__doc__ % sys.argv[0]) sys.exit(1) writer = sys.argv[1] del sys.argv[1] publish_cmdline(writer_name=writer)