hgweb: make templater mostly compatible with log templates

hgweb: make templater mostly compatible with log templates

Prepares for gradually switching templatekw.showsuccsandmarkers() to new API.

This was a PoC showing how to reuse templatekw functions in hgweb. We could
remove rev, node, author, etc. from the commonentry() table, but we'll have
to carefully remove all corresponding symbols from webcommands.*(). Otherwise,
we would face the issue5612.

Still templatekw.keywords aren't exported. Otherwise some tests would fail
because the atom template expects {files} to be empty in filelog, but
templatekw.showfiles() provides the {files} implementation.

--- a/mercurial/hgweb/hgweb_mod.py	Sun Feb 25 14:42:18 2018 +0900
+++ b/mercurial/hgweb/hgweb_mod.py	Fri Dec 22 21:59:38 2017 +0900
@@ -27,6 +27,7 @@
 from .. import (
     encoding,
     error,
+    formatter,
     hg,
     hook,
     profiling,
@@ -197,7 +198,7 @@
             return templatefilters.websub(text, self.websubtable)
 
         # create the templater
-
+        # TODO: export all keywords: defaults = templatekw.keywords.copy()
         defaults = {
             'url': req.url,
             'logourl': logourl,
@@ -212,9 +213,11 @@
             'style': style,
             'nonce': self.nonce,
         }
+        tres = formatter.templateresources(self.repo.ui, self.repo)
         tmpl = templater.templater.frommapfile(mapfile,
                                                filters={'websub': websubfilter},
-                                               defaults=defaults)
+                                               defaults=defaults,
+                                               resources=tres)
         return tmpl
 
 

--- a/mercurial/hgweb/webutil.py	Sun Feb 25 14:42:18 2018 +0900
+++ b/mercurial/hgweb/webutil.py	Fri Dec 22 21:59:38 2017 +0900
@@ -352,8 +352,8 @@
 def formatlinerange(fromline, toline):
     return '%d:%d' % (fromline + 1, toline)
 
-def succsandmarkers(repo, ctx):
-    for item in templatekw.showsuccsandmarkers(repo, ctx):
+def succsandmarkers(repo, ctx, **args):
+    for item in templatekw.showsuccsandmarkers(repo, ctx, **args):
         item['successors'] = _siblings(repo[successor]
                                        for successor in item['successors'])
         yield item
@@ -361,6 +361,11 @@
 def commonentry(repo, ctx):
     node = ctx.node()
     return {
+        # TODO: perhaps ctx.changectx() should be assigned if ctx is a
+        # filectx, but I'm not pretty sure if that would always work because
+        # fctx.parents() != fctx.changectx.parents() for example.
+        'ctx': ctx,
+        'revcache': {},
         'rev': ctx.rev(),
         'node': hex(node),
         'author': ctx.user(),
@@ -369,7 +374,7 @@
         'extra': ctx.extra(),
         'phase': ctx.phasestr(),
         'obsolete': ctx.obsolete(),
-        'succsandmarkers': lambda **x: succsandmarkers(repo, ctx),
+        'succsandmarkers': succsandmarkers,
         'instabilities': [{"instability": i} for i in ctx.instabilities()],
         'branch': nodebranchnodefault(ctx),
         'inbranch': nodeinbranch(repo, ctx),