run-tests: collect aggregate code coverage
Before this patch, every Python process during a code coverage run was
writing coverage data to the same file. I'm not sure if the coverage
package even tries to obtain a lock on the file. But what I do know is
there was some last write wins leading to loss of code coverage data, at
least with -j > 1.
This patch changes the code coverage mechanism to be multiple process
safe. The mechanism for initializing code coverage via sitecustomize.py
has been tweaked so each Python process will produce a separate coverage
data file on disk. Unless two processes generate the same random value,
there are no race conditions writing to the same file. At the end of the
test run, we combine all written files into an aggregate report.
On my machine, running the full test suite produces a little over
20,000 coverage files consuming ~350 MB. As you can imagine, it takes
several seconds to load and merge these coverage files. But when it is
done, you have an accurate picture of the aggregate code coverage for the
entire test suite, which is ~60% line coverage.
#require serve
Some tests for hgweb in an empty repository
$ hg init test
$ cd test
$ hg serve -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
$ cat hg.pid >> $DAEMON_PIDS
$ ("$TESTDIR/get-with-headers.py" localhost:$HGPORT 'shortlog')
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: log</title>
<link rel="alternate" type="application/atom+xml"
href="/atom-log" title="Atom feed for test" />
<link rel="alternate" type="application/rss+xml"
href="/rss-log" title="RSS feed for test" />
</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 class="active">log</li>
<li><a href="/graph/000000000000">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/000000000000">changeset</a></li>
<li><a href="/file/000000000000">browse</a></li>
</ul>
<ul>
</ul>
<ul>
<li><a href="/help">help</a></li>
</ul>
<div class="atom-logo">
<a href="/atom-log" title="subscribe to atom feed">
<img class="atom-logo" src="/static/feed-icon-14x14.png" alt="atom feed" />
</a>
</div>
</div>
<div class="main">
<h2 class="breadcrumb"><a href="/">Mercurial</a> </h2>
<h3>log</h3>
<form class="search" action="/log">
<p><input name="rev" id="search1" type="text" size="30" value="" /></p>
<div id="hint">Find changesets by keywords (author, files, the commit message), revision
number or hash, or <a href="/help/revsets">revset expression</a>.</div>
</form>
<div class="navigate">
<a href="/shortlog/-1?revcount=30">less</a>
<a href="/shortlog/-1?revcount=120">more</a>
| rev -1:
</div>
<table class="bigtable">
<thead>
<tr>
<th class="age">age</th>
<th class="author">author</th>
<th class="description">description</th>
</tr>
</thead>
<tbody class="stripes2">
</tbody>
</table>
<div class="navigate">
<a href="/shortlog/-1?revcount=30">less</a>
<a href="/shortlog/-1?revcount=120">more</a>
| rev -1:
</div>
<script type="text/javascript">
ajaxScrollInit(
'/shortlog/%next%',
'', <!-- NEXTHASH
function (htmlText, previousVal) {
var m = htmlText.match(/'(\w+)', <!-- NEXTHASH/);
return m ? m[1] : null;
},
'.bigtable > tbody:nth-of-type(2)',
'<tr class="%class%">\
<td colspan="3" style="text-align: center;">%text%</td>\
</tr>'
);
</script>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
$ echo babar
babar
$ ("$TESTDIR/get-with-headers.py" localhost:$HGPORT 'log')
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: log</title>
<link rel="alternate" type="application/atom+xml"
href="/atom-log" title="Atom feed for test" />
<link rel="alternate" type="application/rss+xml"
href="/rss-log" title="RSS feed for test" />
</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 class="active">log</li>
<li><a href="/graph/000000000000">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/000000000000">changeset</a></li>
<li><a href="/file/000000000000">browse</a></li>
</ul>
<ul>
</ul>
<ul>
<li><a href="/help">help</a></li>
</ul>
<div class="atom-logo">
<a href="/atom-log" title="subscribe to atom feed">
<img class="atom-logo" src="/static/feed-icon-14x14.png" alt="atom feed" />
</a>
</div>
</div>
<div class="main">
<h2 class="breadcrumb"><a href="/">Mercurial</a> </h2>
<h3>log</h3>
<form class="search" action="/log">
<p><input name="rev" id="search1" type="text" size="30" value="" /></p>
<div id="hint">Find changesets by keywords (author, files, the commit message), revision
number or hash, or <a href="/help/revsets">revset expression</a>.</div>
</form>
<div class="navigate">
<a href="/shortlog/-1?revcount=5">less</a>
<a href="/shortlog/-1?revcount=20">more</a>
| rev -1:
</div>
<table class="bigtable">
<thead>
<tr>
<th class="age">age</th>
<th class="author">author</th>
<th class="description">description</th>
</tr>
</thead>
<tbody class="stripes2">
</tbody>
</table>
<div class="navigate">
<a href="/shortlog/-1?revcount=5">less</a>
<a href="/shortlog/-1?revcount=20">more</a>
| rev -1:
</div>
<script type="text/javascript">
ajaxScrollInit(
'/shortlog/%next%',
'', <!-- NEXTHASH
function (htmlText, previousVal) {
var m = htmlText.match(/'(\w+)', <!-- NEXTHASH/);
return m ? m[1] : null;
},
'.bigtable > tbody:nth-of-type(2)',
'<tr class="%class%">\
<td colspan="3" style="text-align: center;">%text%</td>\
</tr>'
);
</script>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
$ ("$TESTDIR/get-with-headers.py" localhost:$HGPORT 'graph')
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: revision graph</title>
<link rel="alternate" type="application/atom+xml"
href="/atom-log" title="Atom feed for test: log" />
<link rel="alternate" type="application/rss+xml"
href="/rss-log" title="RSS feed for test: log" />
<!--[if IE]><script type="text/javascript" src="/static/excanvas.js"></script><![endif]-->
</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/000000000000">log</a></li>
<li class="active">graph</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/000000000000">changeset</a></li>
<li><a href="/file/000000000000">browse</a></li>
</ul>
<ul>
<li><a href="/help">help</a></li>
</ul>
<div class="atom-logo">
<a href="/atom-log" title="subscribe to atom feed">
<img class="atom-logo" src="/static/feed-icon-14x14.png" alt="atom feed" />
</a>
</div>
</div>
<div class="main">
<h2 class="breadcrumb"><a href="/">Mercurial</a> </h2>
<h3>graph</h3>
<form class="search" action="/log">
<p><input name="rev" id="search1" type="text" size="30" /></p>
<div id="hint">Find changesets by keywords (author, files, the commit message), revision
number or hash, or <a href="/help/revsets">revset expression</a>.</div>
</form>
<div class="navigate">
<a href="/graph/-1?revcount=30">less</a>
<a href="/graph/-1?revcount=120">more</a>
| rev -1:
</div>
<noscript><p>The revision graph only works with JavaScript-enabled browsers.</p></noscript>
<div id="wrapper">
<ul id="nodebgs" class="stripes2"></ul>
<canvas id="graph" width="480" height="12"></canvas>
<ul id="graphnodes"></ul>
</div>
<script type="text/javascript">
<!-- hide script content
var data = [];
var graph = new Graph();
graph.scale(39);
graph.vertex = function(x, y, color, parity, cur) {
this.ctx.beginPath();
color = this.setColor(color, 0.25, 0.75);
this.ctx.arc(x, y, radius, 0, Math.PI * 2, true);
this.ctx.fill();
var bg = '<li class="bg"></li>';
var left = (this.bg_height - this.box_size) + (this.columns + 1) * this.box_size;
var nstyle = 'padding-left: ' + left + 'px;';
var tagspan = '';
if (cur[7].length || cur[8].length || (cur[6][0] != 'default' || cur[6][1])) {
tagspan = '<span class="logtags">';
if (cur[6][1]) {
tagspan += '<span class="branchhead" title="' + cur[6][0] + '">';
tagspan += cur[6][0] + '</span> ';
} else if (!cur[6][1] && cur[6][0] != 'default') {
tagspan += '<span class="branchname" title="' + cur[6][0] + '">';
tagspan += cur[6][0] + '</span> ';
}
if (cur[7].length) {
for (var t in cur[7]) {
var tag = cur[7][t];
tagspan += '<span class="tag">' + tag + '</span> ';
}
}
if (cur[8].length) {
for (var b in cur[8]) {
var bookmark = cur[8][b];
tagspan += '<span class="tag">' + bookmark + '</span> ';
}
}
tagspan += '</span>';
}
var item = '<li style="' + nstyle + '"><span class="desc">';
item += '<a href="/rev/' + cur[0] + '" title="' + cur[0] + '">' + cur[3] + '</a>';
item += '</span>' + tagspan + '<span class="info">' + cur[5] + ', by ' + cur[4] + '</span></li>';
return [bg, item];
}
graph.render(data);
// stop hiding script -->
</script>
<div class="navigate">
<a href="/graph/-1?revcount=30">less</a>
<a href="/graph/-1?revcount=120">more</a>
| rev -1:
</div>
<script type="text/javascript">
ajaxScrollInit(
'/graph/-1?revcount=%next%&style=paper',
60+60,
function (htmlText, previousVal) { return previousVal + 60; },
'#wrapper',
'<div class="%class%" style="text-align: center;">%text%</div>',
'graph'
);
</script>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
$ ("$TESTDIR/get-with-headers.py" localhost:$HGPORT 'file')
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: 000000000000 /</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/000000000000">log</a></li>
<li><a href="/graph/000000000000">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/000000000000">changeset</a></li>
<li class="active">browse</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>directory / @ -1:000000000000 <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 keywords (author, files, the commit message), revision
number or hash, or <a href="/help/revsets">revset expression</a>.</div>
</form>
<table class="bigtable">
<thead>
<tr>
<th class="name">name</th>
<th class="size">size</th>
<th class="permissions">permissions</th>
</tr>
</thead>
<tbody class="stripes2">
<tr class="fileline">
<td class="name"><a href="/file/000000000000/">[up]</a></td>
<td class="size"></td>
<td class="permissions">drwxr-xr-x</td>
</tr>
</tbody>
</table>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
$ cd ..