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sshpeer: initial definition and implementation of new SSH protocol...
sshpeer: initial definition and implementation of new SSH protocol The existing SSH protocol has several design flaws. Future commits will elaborate on these flaws as new features are introduced to combat these flaws. For now, hopefully you can take me for my word that a ground up rewrite of the SSH protocol is needed. This commit lays the foundation for a new SSH protocol by defining a mechanism to upgrade the SSH transport channel away from the default (version 1) protocol to something modern (which we'll call "version 2" for now). This upgrade process is detailed in the internals documentation for the wire protocol. The gist of it is the client sends a request line preceding the "hello" command/line which basically says "I'm requesting an upgrade: here's what I support." If the server recognizes that line, it processes the upgrade request and the transport channel is switched to use the new version of the protocol. If not, it sends an empty response, which is how all Mercurial SSH servers from the beginning of time reacted to unknown commands. The upgrade request is effectively ignored and the client continues to use the existing version of the protocol as if nothing happened. The new version of the SSH protocol is completely identical to version 1 aside from the upgrade dance and the bytes that follow. The immediate bytes that follow the protocol switch are defined to be a length framed "capabilities: " line containing the remote's advertised capabilities. In reality, this looks very similar to what the "hello" response would look like. But it will evolve quickly. The methodology by which the protocol will evolve is important. I'm not going to introduce the new protocol all at once. That would likely lead to endless bike shedding and forward progress would stall. Instead, I intend to tricle out new features and diversions from the existing protocol in small, incremental changes. To support the gradual evolution of the protocol, the on-the-wire advertised protocol name contains an "exp" to denote "experimental" and a 4 digit field to capture the sub-version of the protocol. Whenever we make a BC change to the wire protocol, we can increment this version and lock out all older clients because it will appear as a completely different protocol version. This means we can incur as many breaking changes as we want. We don't have to commit to supporting any one feature or idea for a long period of time. We can even evolve the handshake mechanism, because that is defined as being an implementation detail of the negotiated protocol version! Hopefully this lowers the barrier to accepting changes to the protocol and for experimenting with "radical" ideas during its development. In core, sshpeer received most of the attention. We haven't even implemented the server bits for the new protocol in core yet. Instead, we add very primitive support to our test server, mainly just to exercise the added code paths in sshpeer. Differential Revision: https://phab.mercurial-scm.org/D2061 # no-check-commit because of required foo_bar naming
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test-hgweb-diffs.t
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#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 ..