comparison mercurial/templates/paper/changeset.tmpl @ 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.

35484:1853c8677160

</tr>
<tr>
 <th class="date">date</th>
 <td class="date age">{date|rfc822date}</td>
</tr>
<tr>
 <th class="author">parents</th>
 <td class="author">{ifeq(count(parent), '2', parent%changesetparentdiff, parent%changesetparent)}</td>
</tr>
<tr>

35485:1721ce06100a

</tr>
<tr>
 <th class="date">date</th>
 <td class="date age">{date|rfc822date}</td>
</tr>
{if(obsolete, '<tr>
 <th>obsolete</th>
 <td>{succsandmarkers%obsfateentry}</td>
</tr>')}
<tr>
 <th class="author">parents</th>
 <td class="author">{ifeq(count(parent), '2', parent%changesetparentdiff, parent%changesetparent)}</td>
</tr>
<tr>