hgweb: fix empty navigation detection
For some obscure reason, changelog.node(0) returns nullid if changelog is empty.
this break empty navigation detection. We fix this code by using the length of
the changelog.
Using the length have some issue with revision filtering but this is a small
step in the right direction. Proper fix comes in later changeset.
$ "$TESTDIR/hghave" serve || exit 80
setting up repo
$ hg init test
$ cd test
$ echo a > a
$ hg ci -Ama
adding a
$ hg rm a
$ hg ci -mdel
set up hgweb
$ hg serve -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
$ cat hg.pid >> $DAEMON_PIDS
revision
$ "$TESTDIR/get-with-headers.py" localhost:$HGPORT 'rev/tip'
200 Script output follows
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US">
<head>
<link rel="icon" href="/static/hgicon.png" type="image/png" />
<meta name="robots" content="index, nofollow" />
<link rel="stylesheet" href="/static/style-paper.css" type="text/css" />
<script type="text/javascript" src="/static/mercurial.js"></script>
<title>test: c78f6c5cbea9</title>
</head>
<body>
<div class="container">
<div class="menu">
<div class="logo">
<a href="http://mercurial.selenic.com/">
<img src="/static/hglogo.png" alt="mercurial" /></a>
</div>
<ul>
<li><a href="/shortlog/c78f6c5cbea9">log</a></li>
<li><a href="/graph/c78f6c5cbea9">graph</a></li>
<li><a href="/tags">tags</a></li>
<li><a href="/bookmarks">bookmarks</a></li>
<li><a href="/branches">branches</a></li>
</ul>
<ul>
<li class="active">changeset</li>
<li><a href="/raw-rev/c78f6c5cbea9">raw</a></li>
<li><a href="/file/c78f6c5cbea9">browse</a></li>
</ul>
<ul>
</ul>
<ul>
<li><a href="/help">help</a></li>
</ul>
</div>
<div class="main">
<h2 class="breadcrumb"><a href="/">Mercurial</a> </h2>
<h3>changeset 1:c78f6c5cbea9 <span class="tag">tip</span> </h3>
<form class="search" action="/log">
<p><input name="rev" id="search1" type="text" size="30" /></p>
<div id="hint">find changesets by author, revision,
files, or words in the commit message</div>
</form>
<div class="description">del</div>
<table id="changesetEntry">
<tr>
<th class="author">author</th>
<td class="author">test</td>
</tr>
<tr>
<th class="date">date</th>
<td class="date age">Thu, 01 Jan 1970 00:00:00 +0000</td></tr>
<tr>
<th class="author">parents</th>
<td class="author"><a href="/rev/cb9a9f314b8b">cb9a9f314b8b</a> </td>
</tr>
<tr>
<th class="author">children</th>
<td class="author"></td>
</tr>
<tr>
<th class="files">files</th>
<td class="files">a </td>
</tr>
<tr>
<th class="diffstat">diffstat</th>
<td class="diffstat">
1 files changed, 0 insertions(+), 1 deletions(-)
<a id="diffstatexpand" href="javascript:showDiffstat()"/>[<tt>+</tt>]</a>
<div id="diffstatdetails" style="display:none;">
<a href="javascript:hideDiffstat()"/>[<tt>-</tt>]</a>
<p>
<table> <tr class="parity0">
<td class="diffstat-file"><a href="#l1.1">a</a></td>
<td class="diffstat-total" align="right">1</td>
<td class="diffstat-graph">
<span class="diffstat-add" style="width:0.0%;"> </span>
<span class="diffstat-remove" style="width:100.0%;"> </span>
</td>
</tr>
</table>
</div>
</td>
</tr>
</table>
<div class="overflow">
<div class="sourcefirst"> line diff</div>
<div class="source bottomline parity0"><pre><a href="#l1.1" id="l1.1"> 1.1</a> <span class="minusline">--- a/a Thu Jan 01 00:00:00 1970 +0000
</span><a href="#l1.2" id="l1.2"> 1.2</a> <span class="plusline">+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
</span><a href="#l1.3" id="l1.3"> 1.3</a> <span class="atline">@@ -1,1 +0,0 @@
</span><a href="#l1.4" id="l1.4"> 1.4</a> <span class="minusline">-a
</span></pre></div>
</div>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
diff removed file
$ "$TESTDIR/get-with-headers.py" localhost:$HGPORT 'diff/tip/a'
200 Script output follows
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US">
<head>
<link rel="icon" href="/static/hgicon.png" type="image/png" />
<meta name="robots" content="index, nofollow" />
<link rel="stylesheet" href="/static/style-paper.css" type="text/css" />
<script type="text/javascript" src="/static/mercurial.js"></script>
<title>test: a diff</title>
</head>
<body>
<div class="container">
<div class="menu">
<div class="logo">
<a href="http://mercurial.selenic.com/">
<img src="/static/hglogo.png" alt="mercurial" /></a>
</div>
<ul>
<li><a href="/shortlog/c78f6c5cbea9">log</a></li>
<li><a href="/graph/c78f6c5cbea9">graph</a></li>
<li><a href="/tags">tags</a></li>
<li><a href="/bookmarks">bookmarks</a></li>
<li><a href="/branches">branches</a></li>
</ul>
<ul>
<li><a href="/rev/c78f6c5cbea9">changeset</a></li>
<li><a href="/file/c78f6c5cbea9">browse</a></li>
</ul>
<ul>
<li><a href="/file/c78f6c5cbea9/a">file</a></li>
<li><a href="/file/tip/a">latest</a></li>
<li class="active">diff</li>
<li><a href="/comparison/c78f6c5cbea9/a">comparison</a></li>
<li><a href="/annotate/c78f6c5cbea9/a">annotate</a></li>
<li><a href="/log/c78f6c5cbea9/a">file log</a></li>
<li><a href="/raw-file/c78f6c5cbea9/a">raw</a></li>
</ul>
<ul>
<li><a href="/help">help</a></li>
</ul>
</div>
<div class="main">
<h2 class="breadcrumb"><a href="/">Mercurial</a> </h2>
<h3>diff a @ 1:c78f6c5cbea9</h3>
<form class="search" action="/log">
<p></p>
<p><input name="rev" id="search1" type="text" size="30" /></p>
<div id="hint">find changesets by author, revision,
files, or words in the commit message</div>
</form>
<div class="description">del</div>
<table id="changesetEntry">
<tr>
<th>author</th>
<td>test</td>
</tr>
<tr>
<th>date</th>
<td class="date age">Thu, 01 Jan 1970 00:00:00 +0000</td>
</tr>
<tr>
<th>parents</th>
<td><a href="/file/cb9a9f314b8b/a">cb9a9f314b8b</a> </td>
</tr>
<tr>
<th>children</th>
<td></td>
</tr>
</table>
<div class="overflow">
<div class="sourcefirst"> line diff</div>
<div class="source bottomline parity0"><pre><a href="#l1.1" id="l1.1"> 1.1</a> <span class="minusline">--- a/a Thu Jan 01 00:00:00 1970 +0000
</span><a href="#l1.2" id="l1.2"> 1.2</a> <span class="plusline">+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
</span><a href="#l1.3" id="l1.3"> 1.3</a> <span class="atline">@@ -1,1 +0,0 @@
</span><a href="#l1.4" id="l1.4"> 1.4</a> <span class="minusline">-a
</span></pre></div>
</div>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
$ cd ..