diff mercurial/templates/monoblue/map @ 35485:1721ce06100a

hgweb: display fate of obsolete changesets

Operations that obsolete changesets store enough metadata to explain what
happened after the fact. One way to get that metadata is showsuccsandmarkers
function, which returns a list of successors of a particular changeset and
appropriate obsolescence markers.

Templates have a set of experimental functions that have names starting with
obsfate. This patch uses some of these functions to interpret output of
succsandmarkers() and produce human-friendly messages that describe what
happened to an obsolete changeset, e.g. "pruned" or "rewritten as
6:3de5eca88c00".

In commonentry(), succsandmarkers property is made callable so it's only
executed on demand; this saves time when changeset is not obsolete, and also in
e.g. /shortlog view, where there are a lot of changesets, but we don't need to
show each and every one in detail.

In spartan theme, succsandmarkers is used instead of the simple "obsolete:
yes", in other themes a new line is added to /rev page.

--- a/mercurial/templates/monoblue/map	Sat Dec 16 18:58:02 2017 -0500
+++ b/mercurial/templates/monoblue/map	Tue Nov 21 17:03:41 2017 +0800
@@ -229,6 +229,10 @@
 inbranchtag = '<span class="inbranchtag" title="{name|escape}">{name|escape}</span> '
 bookmarktag = '<span class="bookmarktag" title="{name|escape}">{name|escape}</span> '
 alltags = '<span class="logtags">{phasetag}{obsoletetag}{instabilities%instabilitytag}{inbranch%inbranchtag}{branches%branchtag}{tags%tagtag}{bookmarks%bookmarktag}</span>'
+obsfatesuccessors = '{if(successors, ' as ')}{join(successors, ', ')}'
+obsfateverb = '{obsfateverb(successors, markers)}'
+obsfateoperations = '{if(obsfateoperations(markers), ' using {join(obsfateoperations(markers), ', ')}')}'
+obsfateentry = '{obsfateverb}{obsfateoperations}{obsfatesuccessors}'
 shortlogentry = '
   <tr class="parity{parity}">
     <td class="nowrap age">{date|rfc822date}</td>