hgweb: provide symrev (symbolic revision) property to the templates One of the features of hgweb is that current position in repo history is remembered between separate requests. That is, links from /rev/<node_hash> lead to /file/<node_hash> or /log/<node_hash>, so it's easy to dig deep into the history. However, such links could only use node hashes and local revision numbers, so while staying at one exact revision is easy, staying on top of the changes is not, because hashes presumably can't change (local revision numbers can, but probably not in a way you'd find useful for navigating). So while you could use 'tip' or 'default' in a url, links on that page would be permanent. This is not always desired (think /rev/tip or /graph/stable or /log/@) and is sometimes just confusing (i.e. /log/<not the tip hash>, when recent history is not displayed). And if user changed url deliberately to say default instead of <some node hash>, the page ignores that fact and uses node hash in its links, which means that navigation is, in a way, broken. This new property, symrev, is used for storing current revision the way it was specified, so then templates can use it in links and thus "not dereference" the symbolic revision. It is an additional way to produce links, so not every link needs to drop {node|short} in favor of {symrev}, many will still use node hash (log and filelog entries, annotate lines, etc). Some pages (e.g. summary, tags) always use the tip changeset for their context, in such cases symrev is set to 'tip'. This is needed in case the pages want to provide archive links. highlight extension needs to be updated, since _filerevision now takes an additional positional argument (signature "web, req, tmpl" is used by most of webcommands.py functions). More references to symbolic revisions and related gripes: issue2296, issue2826, issue3594, issue3634.

archive: support 'wdir()' This is a step toward replacing the extdiff internals with archive, in order to support 'extdiff -S'. Only Mercurial subrepos are supported for now. If a file is missing from the filesystem, it is silently skipped. Perhaps it should warn, but it cannot abort when working with extdiff because deleting a file is a legitimate diff.

subrepo: allow a representation of the working directory subrepo Some code cannot handle a subrepo based on the working directory (e.g. sub.dirty()), so the caller must opt in. This will be useful for archive, and perhaps some other commands. The git and svn methods where this is used may need to be fixed up on a case by case basis.

templater: comment that gettemplate() has different name resolution order I've tried to unify gettemplate() with buildtemplate(), but it didn't go well because gettemplate() have to bypass mapping dict. For example, web templates have '{tags%changelogtag}' and 'changelogtag' is defined in both mapping, the default, and context.cache, sourced from map file. In general, mapping shadows context variables, but gettemplate() have to pick it from context.cache.

templater: drop strtoken argument from compiletemplate() There's no "rawstring" template now.

templater: do not reevaluate rawstring as template (BC) The previous patch made 'string' is always interpreted as a template. So this patch removes the special handling of r'rawstring' instead. Now r'' disables template processing at all.