repoview: discard filtered changelog if index isn't shared with unfiltered
Before this patch, revisions rollbacked at failure of previous
transaction might be visible at subsequent operations unintentionally,
if repoview object is reused even after failure of transaction:
e.g. command server and HTTP server are typical cases.
'repoview' uses the tuple of values below of unfiltered changelog as
"the key" to examine validity of filtered changelog cache.
- length
- tip node
- filtered revisions (as hashed value)
- '_delayed' field
'repoview' compares between "the key" of unfiltered changelog at
previous caching and now, and reuses filtered changelog cache if no
change is detected.
But this comparison indicates only that there is no change between
unfiltered 'repo.changelog' at last caching and now, but not that
filtered changelog cache is valid for current unfiltered one.
'repoview' uses "shallow copy" of unfiltered changelog to create
filtered changelog cache. In this case, 'index' buffer of unfiltered
changelog is also referred by filtered changelog.
At failure of transaction, unfiltered changelog itself is invalidated
(= un-referred) on the 'repo' side (see
0a7610758c42 also). But
'index' of it still contains revisions to be rollbacked at this
failure, and is referred by filtered changelog.
Therefore, even if there is no change between unfiltered
'repo.changelog' at last caching and now, steps below makes rollbacked
revisions visible via filtered changelog unintentionally.
1. instantiate unfiltered changelog as 'repo.changelog'
(call it CL1)
2. make filtered (= shallow copy of) CL1
(call it FCL1)
3. cache FCL1 with "the key" of CL1
4. revisions are appended to 'index', which is shared by CL1 and FCL1
5. invalidate 'repo.changelog' (= CL1) at failure of transaction
6. instantiate 'repo.changelog' again at next operation
(call it CL2)
CL2 doesn't have revisions added at (4), because it is
instantiated from '00changelog.i', which isn't changed while
failed transaction.
7. compare between "the key" of CL1 and CL2
8. FCL1 cached at (3) is reused, because comparison at (7) doesn't
detect change between CL1 at (1) and CL2
9. revisions rollbacked at (5) are visible via FCL1 unintentionally,
because FCL1 still refers 'index' changed at (4)
The root cause of this issue is that there is no examination about
validity of filtered changelog cache against current unfiltered one.
This patch discards filtered changelog cache, if its 'index' object
isn't shared with unfiltered one.
BTW, at the time of this patch, redundant truncation of
'00changelog.i' at failure of transaction (see
0a7610758c42 for
detail) often prevents "hg serve" from making already rollbacked
revisions visible, because updating timestamps of '00changelog.i' by
truncation makes "hg serve" discard old repoview object with invalid
filtered changelog cache.
This is reason why this issue is overlooked before this patch, even
though test-bundle2-exchange.t has tests in similar situation: failure
of "hg push" via HTTP by pretxnclose hook on server side doesn't
prevent subsequent commands from looking up outgoing revisions
correctly.
But timestamp on the filesystem doesn't have enough resolution for
recent computation power, and it can't be assumed that this avoidance
always works as expected.
Therefore, without this patch, this issue might appear occasionally.
#require serve
setting up repo
$ hg init test
$ cd test
$ echo a > a
$ echo b > b
$ hg ci -Ama
adding a
adding b
change permissions for git diffs
$ hg import -q --bypass - <<EOF
> # HG changeset patch
> # User test
> # Date 0 0
> b
>
> diff --git a/a b/a
> old mode 100644
> new mode 100755
> diff --git a/b b/b
> deleted file mode 100644
> --- a/b
> +++ /dev/null
> @@ -1,1 +0,0 @@
> -b
> EOF
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
$ get-with-headers.py localhost:$HGPORT 'rev/0'
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: 0cd96de13884</title>
</head>
<body>
<div class="container">
<div class="menu">
<div class="logo">
<a href="https://mercurial-scm.org/">
<img src="/static/hglogo.png" alt="mercurial" /></a>
</div>
<ul>
<li><a href="/shortlog/0">log</a></li>
<li><a href="/graph/0">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/0">raw</a></li>
<li><a href="/file/0">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 0:<a href="/rev/0cd96de13884">0cd96de13884</a>
</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="description">a</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"></td>
</tr>
<tr>
<th class="author">children</th>
<td class="author"> <a href="/rev/559edbd9ed20">559edbd9ed20</a></td>
</tr>
<tr>
<th class="files">files</th>
<td class="files"><a href="/file/0cd96de13884/a">a</a> <a href="/file/0cd96de13884/b">b</a> </td>
</tr>
<tr>
<th class="diffstat">diffstat</th>
<td class="diffstat">
2 files changed, 2 insertions(+), 0 deletions(-)
<a id="diffstatexpand" href="javascript:toggleDiffstat()">[<tt>+</tt>]</a>
<div id="diffstatdetails" style="display:none;">
<a href="javascript:toggleDiffstat()">[<tt>-</tt>]</a>
<table class="diffstat-table stripes2"> <tr>
<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:100.0%;"> </span>
<span class="diffstat-remove" style="width:0.0%;"> </span>
</td>
</tr>
<tr>
<td class="diffstat-file"><a href="#l2.1">b</a></td>
<td class="diffstat-total" align="right">1</td>
<td class="diffstat-graph">
<span class="diffstat-add" style="width:100.0%;"> </span>
<span class="diffstat-remove" style="width:0.0%;"> </span>
</td>
</tr>
</table>
</div>
</td>
</tr>
</table>
<div class="overflow">
<div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="javascript:toggleLinewrap()">on</a></div>
<div class="sourcefirst"> line diff</div>
<div class="stripes2 diffblocks">
<div class="bottomline inc-lineno"><pre class="sourcelines wrap">
<span id="l1.1" class="minusline">--- /dev/null Thu Jan 01 00:00:00 1970 +0000</span><a href="#l1.1"></a>
<span id="l1.2" class="plusline">+++ b/a Thu Jan 01 00:00:00 1970 +0000</span><a href="#l1.2"></a>
<span id="l1.3" class="atline">@@ -0,0 +1,1 @@</span><a href="#l1.3"></a>
<span id="l1.4" class="plusline">+a</span><a href="#l1.4"></a></pre></div><div class="bottomline inc-lineno"><pre class="sourcelines wrap">
<span id="l2.1" class="minusline">--- /dev/null Thu Jan 01 00:00:00 1970 +0000</span><a href="#l2.1"></a>
<span id="l2.2" class="plusline">+++ b/b Thu Jan 01 00:00:00 1970 +0000</span><a href="#l2.2"></a>
<span id="l2.3" class="atline">@@ -0,0 +1,1 @@</span><a href="#l2.3"></a>
<span id="l2.4" class="plusline">+b</span><a href="#l2.4"></a></pre></div>
</div>
</div>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
raw revision
$ get-with-headers.py localhost:$HGPORT 'raw-rev/0'
200 Script output follows
# HG changeset patch
# User test
# Date 0 0
# Node ID 0cd96de13884b090099512d4794ae87ad067ea8e
a
diff -r 000000000000 -r 0cd96de13884 a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/a Thu Jan 01 00:00:00 1970 +0000
@@ -0,0 +1,1 @@
+a
diff -r 000000000000 -r 0cd96de13884 b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/b Thu Jan 01 00:00:00 1970 +0000
@@ -0,0 +1,1 @@
+b
diff removed file
$ hg log --template "{file_mods}\n{file_dels}\n" -r tip
a
b
$ hg parents --template "{node|short}\n" -r tip
0cd96de13884
$ hg parents --template "{node|short}\n" -r tip b
0cd96de13884
$ get-with-headers.py localhost:$HGPORT 'diff/tip/b'
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: b diff</title>
</head>
<body>
<div class="container">
<div class="menu">
<div class="logo">
<a href="https://mercurial-scm.org/">
<img src="/static/hglogo.png" alt="mercurial" /></a>
</div>
<ul>
<li><a href="/shortlog/tip">log</a></li>
<li><a href="/graph/tip">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/tip">changeset</a></li>
<li><a href="/file/tip">browse</a></li>
</ul>
<ul>
<li><a href="/file/tip/b">file</a></li>
<li><a href="/file/tip/b">latest</a></li>
<li class="active">diff</li>
<li><a href="/comparison/tip/b">comparison</a></li>
<li><a href="/annotate/tip/b">annotate</a></li>
<li><a href="/log/tip/b">file log</a></li>
<li><a href="/raw-file/tip/b">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 b @ 1:<a href="/rev/559edbd9ed20">559edbd9ed20</a>
<span class="tag">tip</span>
</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 keywords (author, files, the commit message), revision
number or hash, or <a href="/help/revsets">revset expression</a>.</div>
</form>
<div class="description">b</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/0cd96de13884/b">0cd96de13884</a> </td>
</tr>
<tr>
<th>children</th>
<td></td>
</tr>
</table>
<div class="overflow">
<div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="javascript:toggleLinewrap()">on</a></div>
<div class="sourcefirst"> line diff</div>
<div class="stripes2 diffblocks">
<div class="bottomline inc-lineno"><pre class="sourcelines wrap">
<span id="l1.1" class="minusline">--- a/b Thu Jan 01 00:00:00 1970 +0000</span><a href="#l1.1"></a>
<span id="l1.2" class="plusline">+++ /dev/null Thu Jan 01 00:00:00 1970 +0000</span><a href="#l1.2"></a>
<span id="l1.3" class="atline">@@ -1,1 +0,0 @@</span><a href="#l1.3"></a>
<span id="l1.4" class="minusline">-b</span><a href="#l1.4"></a></pre></div>
</div>
</div>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
set up hgweb with git diffs
$ killdaemons.py
$ hg serve --config 'diff.git=1' -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
$ cat hg.pid >> $DAEMON_PIDS
revision
$ get-with-headers.py localhost:$HGPORT 'rev/0'
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: 0cd96de13884</title>
</head>
<body>
<div class="container">
<div class="menu">
<div class="logo">
<a href="https://mercurial-scm.org/">
<img src="/static/hglogo.png" alt="mercurial" /></a>
</div>
<ul>
<li><a href="/shortlog/0">log</a></li>
<li><a href="/graph/0">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/0">raw</a></li>
<li><a href="/file/0">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 0:<a href="/rev/0cd96de13884">0cd96de13884</a>
</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="description">a</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"></td>
</tr>
<tr>
<th class="author">children</th>
<td class="author"> <a href="/rev/559edbd9ed20">559edbd9ed20</a></td>
</tr>
<tr>
<th class="files">files</th>
<td class="files"><a href="/file/0cd96de13884/a">a</a> <a href="/file/0cd96de13884/b">b</a> </td>
</tr>
<tr>
<th class="diffstat">diffstat</th>
<td class="diffstat">
2 files changed, 2 insertions(+), 0 deletions(-)
<a id="diffstatexpand" href="javascript:toggleDiffstat()">[<tt>+</tt>]</a>
<div id="diffstatdetails" style="display:none;">
<a href="javascript:toggleDiffstat()">[<tt>-</tt>]</a>
<table class="diffstat-table stripes2"> <tr>
<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:100.0%;"> </span>
<span class="diffstat-remove" style="width:0.0%;"> </span>
</td>
</tr>
<tr>
<td class="diffstat-file"><a href="#l2.1">b</a></td>
<td class="diffstat-total" align="right">1</td>
<td class="diffstat-graph">
<span class="diffstat-add" style="width:100.0%;"> </span>
<span class="diffstat-remove" style="width:0.0%;"> </span>
</td>
</tr>
</table>
</div>
</td>
</tr>
</table>
<div class="overflow">
<div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="javascript:toggleLinewrap()">on</a></div>
<div class="sourcefirst"> line diff</div>
<div class="stripes2 diffblocks">
<div class="bottomline inc-lineno"><pre class="sourcelines wrap">
<span id="l1.1">new file mode 100644</span><a href="#l1.1"></a>
<span id="l1.2" class="minusline">--- /dev/null</span><a href="#l1.2"></a>
<span id="l1.3" class="plusline">+++ b/a</span><a href="#l1.3"></a>
<span id="l1.4" class="atline">@@ -0,0 +1,1 @@</span><a href="#l1.4"></a>
<span id="l1.5" class="plusline">+a</span><a href="#l1.5"></a></pre></div><div class="bottomline inc-lineno"><pre class="sourcelines wrap">
<span id="l2.1">new file mode 100644</span><a href="#l2.1"></a>
<span id="l2.2" class="minusline">--- /dev/null</span><a href="#l2.2"></a>
<span id="l2.3" class="plusline">+++ b/b</span><a href="#l2.3"></a>
<span id="l2.4" class="atline">@@ -0,0 +1,1 @@</span><a href="#l2.4"></a>
<span id="l2.5" class="plusline">+b</span><a href="#l2.5"></a></pre></div>
</div>
</div>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
revision
$ get-with-headers.py localhost:$HGPORT 'raw-rev/0'
200 Script output follows
# HG changeset patch
# User test
# Date 0 0
# Node ID 0cd96de13884b090099512d4794ae87ad067ea8e
a
diff --git a/a b/a
new file mode 100644
--- /dev/null
+++ b/a
@@ -0,0 +1,1 @@
+a
diff --git a/b b/b
new file mode 100644
--- /dev/null
+++ b/b
@@ -0,0 +1,1 @@
+b
diff modified file
$ hg log --template "{file_mods}\n{file_dels}\n" -r tip
a
b
$ hg parents --template "{node|short}\n" -r tip
0cd96de13884
$ hg parents --template "{node|short}\n" -r tip a
0cd96de13884
$ 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="https://mercurial-scm.org/">
<img src="/static/hglogo.png" alt="mercurial" /></a>
</div>
<ul>
<li><a href="/shortlog/tip">log</a></li>
<li><a href="/graph/tip">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/tip">changeset</a></li>
<li><a href="/file/tip">browse</a></li>
</ul>
<ul>
<li><a href="/file/tip/a">file</a></li>
<li><a href="/file/tip/a">latest</a></li>
<li class="active">diff</li>
<li><a href="/comparison/tip/a">comparison</a></li>
<li><a href="/annotate/tip/a">annotate</a></li>
<li><a href="/log/tip/a">file log</a></li>
<li><a href="/raw-file/tip/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:<a href="/rev/559edbd9ed20">559edbd9ed20</a>
<span class="tag">tip</span>
</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 keywords (author, files, the commit message), revision
number or hash, or <a href="/help/revsets">revset expression</a>.</div>
</form>
<div class="description">b</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/0cd96de13884/a">0cd96de13884</a> </td>
</tr>
<tr>
<th>children</th>
<td></td>
</tr>
</table>
<div class="overflow">
<div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="javascript:toggleLinewrap()">on</a></div>
<div class="sourcefirst"> line diff</div>
<div class="stripes2 diffblocks">
<div class="bottomline inc-lineno"><pre class="sourcelines wrap">
<span id="l1.1">old mode 100644</span><a href="#l1.1"></a>
<span id="l1.2">new mode 100755</span><a href="#l1.2"></a></pre></div>
</div>
</div>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
comparison new file
$ hg parents --template "{rev}:{node|short}\n" -r 0
$ hg log --template "{rev}:{node|short}\n" -r 0
0:0cd96de13884
$ get-with-headers.py localhost:$HGPORT 'comparison/0/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 comparison</title>
</head>
<body>
<div class="container">
<div class="menu">
<div class="logo">
<a href="https://mercurial-scm.org/">
<img src="/static/hglogo.png" alt="mercurial" /></a>
</div>
<ul>
<li><a href="/shortlog/0">log</a></li>
<li><a href="/graph/0">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/0">changeset</a></li>
<li><a href="/file/0">browse</a></li>
</ul>
<ul>
<li><a href="/file/0/a">file</a></li>
<li><a href="/file/tip/a">latest</a></li>
<li><a href="/diff/0/a">diff</a></li>
<li class="active">comparison</li>
<li><a href="/annotate/0/a">annotate</a></li>
<li><a href="/log/0/a">file log</a></li>
<li><a href="/raw-file/0/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>
comparison a @ 0:<a href="/rev/0cd96de13884">0cd96de13884</a>
</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 keywords (author, files, the commit message), revision
number or hash, or <a href="/help/revsets">revset expression</a>.</div>
</form>
<div class="description">a</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></td>
</tr>
<tr>
<th>children</th>
<td></td>
</tr>
</table>
<div class="overflow">
<div class="sourcefirst"> comparison</div>
<div class="legend">
<span class="legendinfo equal">equal</span>
<span class="legendinfo delete">deleted</span>
<span class="legendinfo insert">inserted</span>
<span class="legendinfo replace">replaced</span>
</div>
<table class="bigtable">
<thead class="header">
<tr>
<th>-1:000000000000</th>
<th>0:0cd96de13884</th>
</tr>
</thead>
<tbody class="block">
<tr id="r1">
<td class="source insert"><a href="#r1"> </a> </td>
<td class="source insert"><a href="#r1"> 1</a> a</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
comparison existing file
$ hg up
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ echo a >> a
$ hg ci -mc
$ hg parents --template "{rev}:{node|short}\n" -r tip
1:559edbd9ed20
$ hg log --template "{rev}:{node|short}\n" -r tip
2:d73db4d812ff
$ get-with-headers.py localhost:$HGPORT 'comparison/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 comparison</title>
</head>
<body>
<div class="container">
<div class="menu">
<div class="logo">
<a href="https://mercurial-scm.org/">
<img src="/static/hglogo.png" alt="mercurial" /></a>
</div>
<ul>
<li><a href="/shortlog/tip">log</a></li>
<li><a href="/graph/tip">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/tip">changeset</a></li>
<li><a href="/file/tip">browse</a></li>
</ul>
<ul>
<li><a href="/file/tip/a">file</a></li>
<li><a href="/file/tip/a">latest</a></li>
<li><a href="/diff/tip/a">diff</a></li>
<li class="active">comparison</li>
<li><a href="/annotate/tip/a">annotate</a></li>
<li><a href="/log/tip/a">file log</a></li>
<li><a href="/raw-file/tip/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>
comparison a @ 2:<a href="/rev/d73db4d812ff">d73db4d812ff</a>
<span class="tag">tip</span>
</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 keywords (author, files, the commit message), revision
number or hash, or <a href="/help/revsets">revset expression</a>.</div>
</form>
<div class="description">c</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/0cd96de13884/a">0cd96de13884</a> </td>
</tr>
<tr>
<th>children</th>
<td></td>
</tr>
</table>
<div class="overflow">
<div class="sourcefirst"> comparison</div>
<div class="legend">
<span class="legendinfo equal">equal</span>
<span class="legendinfo delete">deleted</span>
<span class="legendinfo insert">inserted</span>
<span class="legendinfo replace">replaced</span>
</div>
<table class="bigtable">
<thead class="header">
<tr>
<th>1:559edbd9ed20</th>
<th>2:d73db4d812ff</th>
</tr>
</thead>
<tbody class="block">
<tr id="l1r1">
<td class="source equal"><a href="#l1r1"> 1</a> a</td>
<td class="source equal"><a href="#l1r1"> 1</a> a</td>
</tr>
<tr id="r2">
<td class="source insert"><a href="#r2"> </a> </td>
<td class="source insert"><a href="#r2"> 2</a> a</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
comparison removed file
$ hg rm a
$ hg ci -md
$ hg parents --template "{rev}:{node|short}\n" -r tip
2:d73db4d812ff
$ hg log --template "{rev}:{node|short}\n" -r tip
3:20e80271eb7a
$ get-with-headers.py localhost:$HGPORT 'comparison/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 comparison</title>
</head>
<body>
<div class="container">
<div class="menu">
<div class="logo">
<a href="https://mercurial-scm.org/">
<img src="/static/hglogo.png" alt="mercurial" /></a>
</div>
<ul>
<li><a href="/shortlog/tip">log</a></li>
<li><a href="/graph/tip">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/tip">changeset</a></li>
<li><a href="/file/tip">browse</a></li>
</ul>
<ul>
<li><a href="/file/tip/a">file</a></li>
<li><a href="/file/tip/a">latest</a></li>
<li><a href="/diff/tip/a">diff</a></li>
<li class="active">comparison</li>
<li><a href="/annotate/tip/a">annotate</a></li>
<li><a href="/log/tip/a">file log</a></li>
<li><a href="/raw-file/tip/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>
comparison a @ 3:<a href="/rev/20e80271eb7a">20e80271eb7a</a>
<span class="tag">tip</span>
</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 keywords (author, files, the commit message), revision
number or hash, or <a href="/help/revsets">revset expression</a>.</div>
</form>
<div class="description">d</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/d73db4d812ff/a">d73db4d812ff</a> </td>
</tr>
<tr>
<th>children</th>
<td></td>
</tr>
</table>
<div class="overflow">
<div class="sourcefirst"> comparison</div>
<div class="legend">
<span class="legendinfo equal">equal</span>
<span class="legendinfo delete">deleted</span>
<span class="legendinfo insert">inserted</span>
<span class="legendinfo replace">replaced</span>
</div>
<table class="bigtable">
<thead class="header">
<tr>
<th>2:d73db4d812ff</th>
<th>3:20e80271eb7a</th>
</tr>
</thead>
<tbody class="block">
<tr id="l1">
<td class="source delete"><a href="#l1"> 1</a> a</td>
<td class="source delete"><a href="#l1"> </a> </td>
</tr>
<tr id="l2">
<td class="source delete"><a href="#l2"> 2</a> a</td>
<td class="source delete"><a href="#l2"> </a> </td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
comparison not-modified file
$ echo e > e
$ hg add e
$ hg ci -m e
$ echo f > f
$ hg add f
$ hg ci -m f
$ hg tip --template "{rev}:{node|short}\n"
5:41d9fc4a6ae1
$ hg diff -c tip e
$ hg parents --template "{rev}:{node|short}\n" -r tip
4:402bea3b0976
$ hg parents --template "{rev}:{node|short}\n" -r tip e
4:402bea3b0976
$ get-with-headers.py localhost:$HGPORT 'comparison/tip/e'
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: e comparison</title>
</head>
<body>
<div class="container">
<div class="menu">
<div class="logo">
<a href="https://mercurial-scm.org/">
<img src="/static/hglogo.png" alt="mercurial" /></a>
</div>
<ul>
<li><a href="/shortlog/tip">log</a></li>
<li><a href="/graph/tip">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/tip">changeset</a></li>
<li><a href="/file/tip">browse</a></li>
</ul>
<ul>
<li><a href="/file/tip/e">file</a></li>
<li><a href="/file/tip/e">latest</a></li>
<li><a href="/diff/tip/e">diff</a></li>
<li class="active">comparison</li>
<li><a href="/annotate/tip/e">annotate</a></li>
<li><a href="/log/tip/e">file log</a></li>
<li><a href="/raw-file/tip/e">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>
comparison e @ 5:<a href="/rev/41d9fc4a6ae1">41d9fc4a6ae1</a>
<span class="tag">tip</span>
</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 keywords (author, files, the commit message), revision
number or hash, or <a href="/help/revsets">revset expression</a>.</div>
</form>
<div class="description">f</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/402bea3b0976/e">402bea3b0976</a> </td>
</tr>
<tr>
<th>children</th>
<td></td>
</tr>
</table>
<div class="overflow">
<div class="sourcefirst"> comparison</div>
<div class="legend">
<span class="legendinfo equal">equal</span>
<span class="legendinfo delete">deleted</span>
<span class="legendinfo insert">inserted</span>
<span class="legendinfo replace">replaced</span>
</div>
<table class="bigtable">
<thead class="header">
<tr>
<th>4:402bea3b0976</th>
<th>5:41d9fc4a6ae1</th>
</tr>
</thead>
</table>
</div>
</div>
</div>
<script type="text/javascript">process_dates()</script>
</body>
</html>
$ cd ..
test import rev as raw-rev
$ hg clone -r0 test test1
adding changesets
adding manifests
adding file changes
added 1 changesets with 2 changes to 2 files
updating to branch default
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd test1
$ hg import -q --bypass --exact http://localhost:$HGPORT/rev/1
raw revision with diff block numbers
$ killdaemons.py
$ cat <<EOF > .hg/hgrc
> [web]
> templates = rawdiff
> EOF
$ mkdir rawdiff
$ cat <<EOF > rawdiff/map
> mimetype = 'text/plain; charset={encoding}'
> changeset = '{diff}'
> difflineplus = '{line}'
> difflineminus = '{line}'
> difflineat = '{line}'
> diffline = '{line}'
> filenodelink = ''
> filenolink = ''
> fileline = '{line}'
> diffblock = 'Block: {blockno}\n{lines}\n'
> EOF
$ hg serve -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
$ cat hg.pid >> $DAEMON_PIDS
$ get-with-headers.py localhost:$HGPORT 'raw-rev/0'
200 Script output follows
Block: 1
diff -r 000000000000 -r 0cd96de13884 a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/a Thu Jan 01 00:00:00 1970 +0000
@@ -0,0 +1,1 @@
+a
Block: 2
diff -r 000000000000 -r 0cd96de13884 b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/b Thu Jan 01 00:00:00 1970 +0000
@@ -0,0 +1,1 @@
+b
$ killdaemons.py
$ rm .hg/hgrc rawdiff/map
$ rmdir rawdiff
$ hg serve -n test -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log
$ cat hg.pid >> $DAEMON_PIDS
errors
$ cat ../test/errors.log
$ cd ..