view tests/test-hgweb-diffs.t @ 35793:4fb2bb61597c

bundle2: increase payload part chunk size to 32kb Bundle2 payload parts are framed chunks. Esentially, we obtain data in equal size chunks of size `preferedchunksize` and emit those to a generator. That generator is fed into a compressor (which can be the no-op compressor, which just re-emits the generator). And the output from the compressor likely goes to a file descriptor or socket. What this means is that small chunk sizes create more Python objects and Python function calls than larger chunk sizes. And as we know, Python object and function call overhead in performance sensitive code matters (at least with CPython). This commit increases the bundle2 part payload chunk size from 4k to 32k. Practically speaking, this means that the chunks we feed into a compressor (implemented in C code) or feed directly into a file handle or socket write() are larger. It's possible the chunks might be larger than what the receiver can handle in one logical operation. But at that point, we're in C code, which is much more efficient at dealing with splitting up the chunk and making multiple function calls than Python is. A downside to larger chunks is that the receiver has to wait for that much data to arrive (either raw or from a decompressor) before it can process the chunk. But 32kb still feels like a small buffer to have to wait for. And in many cases, the client will convert from 8 read(4096) to 1 read(32768). That's happening in Python land. So we cut down on the number of Python objects and function calls, making the client faster as well. I don't think there are any significant concerns to increasing the payload chunk size to 32kb. The impact of this change on performance significant. Using `curl` to obtain a stream clone bundle2 payload from a server on localhost serving the mozilla-unified repository: before: 20.78 user; 7.71 system; 80.5 MB/s after: 13.90 user; 3.51 system; 132 MB/s legacy: 9.72 user; 8.16 system; 132 MB/s bundle2 stream clone generation is still more resource intensive than legacy stream clone (that's likely because of the use of a util.chunkbuffer). But the throughput is the same. We might be in territory we're this is effectively a benchmark of the networking stack or Python's syscall throughput. From the client perspective, `hg clone -U --stream`: before: 33.50 user; 7.95 system; 53.3 MB/s after: 22.82 user; 7.33 system; 72.7 MB/s legacy: 29.96 user; 7.94 system; 58.0 MB/s And for `hg clone --stream` with a working directory update of ~230k files: after: 119.55 user; 26.47 system; 0:57.08 wall legacy: 126.98 user; 26.94 system; 1:05.56 wall So, it appears that bundle2's stream clone is now definitively faster than legacy stream clone! Differential Revision: https://phab.mercurial-scm.org/D1932
author Gregory Szorc <gregory.szorc@gmail.com>
date Sat, 20 Jan 2018 22:55:42 -0800
parents 1721ce06100a
children f21798a6bc20
line wrap: on
line source

#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>
   <span class="phase">draft</span> 
  </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="description">a</div>
  
  <table id="changesetEntry">
  <tr>
   <th class="author">author</th>
   <td class="author">&#116;&#101;&#115;&#116;</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%;">&nbsp;</span>
        <span class="diffstat-remove" style="width:0.0%;">&nbsp;</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%;">&nbsp;</span>
        <span class="diffstat-remove" style="width:0.0%;">&nbsp;</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>
  
  
  </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="phase">draft</span> <span class="branchhead">default</span> <span class="tag">tip</span> 
  </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="description">b</div>
  
  <table id="changesetEntry">
  <tr>
   <th>author</th>
   <td>&#116;&#101;&#115;&#116;</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>
  
  
  
  </body>
  </html>
  

set up hgweb with git diffs + noprefix

  $ killdaemons.py
  $ hg serve --config 'diff.git=1' --config 'diff.noprefix=1' -p $HGPORT -d \
  > --pid-file=hg.pid -A access.log -E errors.log
  $ cat hg.pid >> $DAEMON_PIDS

patch header and diffstat

  $ get-with-headers.py localhost:$HGPORT 'rev/0' \
  > | egrep 'files changed|---|\+\+\+'
       2 files changed, 2 insertions(+), 0 deletions(-)
  <span id="l1.2" class="minusline">--- /dev/null</span><a href="#l1.2"></a>
  <span id="l1.3" class="plusline">+++ a</span><a href="#l1.3"></a>
  <span id="l2.2" class="minusline">--- /dev/null</span><a href="#l2.2"></a>
  <span id="l2.3" class="plusline">+++ b</span><a href="#l2.3"></a>

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>
   <span class="phase">draft</span> 
  </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="description">a</div>
  
  <table id="changesetEntry">
  <tr>
   <th class="author">author</th>
   <td class="author">&#116;&#101;&#115;&#116;</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%;">&nbsp;</span>
        <span class="diffstat-remove" style="width:0.0%;">&nbsp;</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%;">&nbsp;</span>
        <span class="diffstat-remove" style="width:0.0%;">&nbsp;</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>
  
  
  </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="phase">draft</span> <span class="branchhead">default</span> <span class="tag">tip</span> 
  </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="description">b</div>
  
  <table id="changesetEntry">
  <tr>
   <th>author</th>
   <td>&#116;&#101;&#115;&#116;</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>
  
  
  
  </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>
   <span class="phase">draft</span> 
  </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="description">a</div>
  
  <table id="changesetEntry">
  <tr>
   <th>author</th>
   <td>&#116;&#101;&#115;&#116;</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>
  
  
  
  </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="phase">draft</span> <span class="branchhead">default</span> <span class="tag">tip</span> 
  </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="description">c</div>
  
  <table id="changesetEntry">
  <tr>
   <th>author</th>
   <td>&#116;&#101;&#115;&#116;</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>
  
  
  
  </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="phase">draft</span> <span class="branchhead">default</span> <span class="tag">tip</span> 
  </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="description">d</div>
  
  <table id="changesetEntry">
  <tr>
   <th>author</th>
   <td>&#116;&#101;&#115;&#116;</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>
  
  
  
  </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="phase">draft</span> <span class="branchhead">default</span> <span class="tag">tip</span> 
  </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="description">f</div>
  
  <table id="changesetEntry">
  <tr>
   <th>author</th>
   <td>&#116;&#101;&#115;&#116;</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>
  
  
  
  </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
  new changesets 0cd96de13884
  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 ..