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Unified Diff: docs/html/depot_tools_tutorial.html

Issue 225433003: Add a basic tutorial for the tools in depot_tools. (Closed) Base URL: https://chromium.googlesource.com/chromium/tools/depot_tools.git@git_map
Patch Set: pylint Created 6 years, 8 months ago
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Index: docs/html/depot_tools_tutorial.html
diff --git a/docs/html/depot_tools_tutorial.html b/docs/html/depot_tools_tutorial.html
new file mode 100644
index 0000000000000000000000000000000000000000..1df7ae06ae4d178c547a589639f049a1670ba83f
--- /dev/null
+++ b/docs/html/depot_tools_tutorial.html
@@ -0,0 +1,1571 @@
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+<body class="manpage">
+<div id="header">
+<h1>
+depot_tools_tutorial(7) Manual Page
+</h1>
+<h2>NAME</h2>
+<div class="sectionbody">
+<p>depot_tools_tutorial -
+ A tutorial introduction to the Chromium depot_tools git extensions.
+</p>
+</div>
+</div>
+<div id="content">
+<div class="sect1">
+<h2 id="_description">DESCRIPTION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The Chromium <a href="depot_tools.html">depot_tools(7)</a> suite contains many git workflow-enhancing
+tools which are designed to work together to enable anyone to wrangle the
+Chromium codebase expertly. This tutorial explains how to do development on
+Chromium using these tools. This will cover:</p></div>
+<div class="ulist"><ul>
+<li>
+<p>
+<a href="#_setting_up">Setting up</a>
+</p>
+</li>
+<li>
+<p>
+<a href="#_getting_the_code">Getting the code</a>
+</p>
+</li>
+<li>
+<p>
+<a href="#_tl_dr_walkthrough">TL;DR Walkthrough</a>
+</p>
+</li>
+<li>
+<p>
+<a href="#_creating_uploading_a_cl">Creating / Uploading a CL</a>
+</p>
+</li>
+<li>
+<p>
+<a href="#_updating_the_code">Updating the code</a>
+</p>
+</li>
+<li>
+<p>
+<a href="#_managing_multiple_cls">Managing multiple CLs</a>
+</p>
+</li>
+<li>
+<p>
+<a href="#_managing_dependent_cls">Managing dependent CLs</a>
+</p>
+</li>
+</ul></div>
+<div class="paragraph"><p>Please refer to the manpages (or <code>--help</code> output) for details about any of the
+commands mentioned in this tutorial.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">If your platform does not support manpages (or you prefer something a bit more
+expressive than plain text) you can find all documentation in <em>html</em> form in the
+<code>[DEPOT_TOOLS]/docs/html</code> folder.</td>
+</tr></table>
+</div>
+<div class="sect2">
+<h3 id="_prerequisites">PREREQUISITES</h3>
+<div class="paragraph"><p>This tutorial assumes basic familiarity with git terminology and concepts. If you
+need to brush up on these, the following are very good resources:</p></div>
+<div class="ulist"><ul>
+<li>
+<p>
+<a href="http://think-like-a-git.net/">Think like (a) Git</a> - A lighthearted
+ overview of git. If you&#8217;re sorta-familiar with git, but not <em>comfortable</em> with
+ it, then give this a look.
+</p>
+</li>
+<li>
+<p>
+<a href="http://gitimmersion.com/">Git Immersion Tutorial</a> - An in-depth git
+ tutorial.
+</p>
+</li>
+<li>
+<p>
+<a href="http://pcottle.github.io/learnGitBranching">pcottle&#8217;s Visual Git
+ Branching</a> - An excellent interactive/graphical demo on how git handles
+ commits, branches, and shows the operations git performs on them.
+</p>
+</li>
+<li>
+<p>
+<a href="http://git-scm.com/book">Pro Git book</a> - &#8220;The&#8221; book for learning git
+ from basics to advanced concepts. A bit dry, but very through.
+</p>
+</li>
+</ul></div>
+<div class="paragraph"><p>If you&#8217;ve tried these out and are still having some trouble getting started,
+there are <em>many</em> other resources online which should help. If you&#8217;re <em>really</em>
+<strong><em>really</em></strong> stuck, then chat up one of the Chromium infrastructure team
+members for some pointers.</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+Litmus Test
+</dt>
+<dd>
+<p>
+ If you know what <code>git add</code>, <code>git status</code>, <code>git commit</code> do and you know
+ <em>essentially</em> what <code>git rebase</code> does, then you should know enough to follow
+ along.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_setting_up">SETTING UP</h2>
+<div class="sectionbody">
+<div class="sect2">
+<h3 id="_get_depot_tools">GET DEPOT TOOLS</h3>
+<div class="sect3">
+<h4 id="_linux_mac">LINUX / MAC</h4>
+<div class="paragraph"><p>Clone the <em>depot_tools</em> repository:</p></div>
+<div class="listingblock">
+<div class="content">
+<pre><code><strong><span class="white">$ git clone https://chromium.googlesource.com/chromium/tools/depot_tools</span></strong></code></pre>
+</div></div>
+<div class="paragraph"><p>Add <em>depot_tools</em> to the <em>end</em> of your PATH and MANPATH (you will probably want
+to put this in your <code>~/.bashrc</code> or <code>~/.zshrc</code>). Assuming you cloned
+<em>depot_tools</em> to <code>/path/to/depot_tools</code>:</p></div>
+<div class="listingblock">
+<div class="content">
+<pre><code><strong><span class="white">$ export PATH=$PATH:/path/to/depot_tools</span></strong>
+<strong><span class="white">$ export MANPATH=$MANPATH:/path/to/depot_tools/docs</span></strong> <b>&lt;1&gt;</b></code></pre>
+</div></div>
+<div class="colist arabic"><ol>
+<li>
+<p>
+Observe that this path is <code>depot_tools/</code><strong><code>docs</code></strong>.
+</p>
+</li>
+</ol></div>
+</div>
+<div class="sect3">
+<h4 id="_windows">WINDOWS</h4>
+<div class="paragraph"><p>Download the <em>depot_tools</em>
+<a href="https://src.chromium.org/svn/trunk/tools/depot_tools.zip">bundle</a> and
+extract it somewhere.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Warning</div>
+</td>
+<td class="content"><strong>DO NOT</strong> use drag-n-drop or copy-n-paste extract from Explorer, this will not
+extract the hidden &#8220;.git&#8221; folder which is necessary for <em>depot_tools</em> to
+autoupdate itself. You can use &#8220;Extract all&#8230;&#8221; from the context menu though.</td>
+</tr></table>
+</div>
+<div class="paragraph"><p>Add <em>depot_tools</em> to the <em>end</em> of your PATH. Assuming you unzipped the
+bundle to <code>C:\workspace\depot_tools</code>:</p></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+With Administrator access:
+</dt>
+<dd>
+<p>
+ <strong>Control Panel &#8594; System and Security &#8594; System &#8594; Advanced system settings</strong>
+</p>
+<div class="paragraph"><p>Modify the PATH system variable to include <code>C:\workspace\depot_tools</code>.</p></div>
+</dd>
+<dt class="hdlist1">
+Without Administrator access:
+</dt>
+<dd>
+<p>
+ <strong>Control Panel &#8594; User Accounts &#8594; User Accounts &#8594; Change my environment variables</strong>
+</p>
+<div class="paragraph"><p>Add a PATH user variable: <code>%PATH%;C:\workspace\depot_tools</code>.</p></div>
+</dd>
+</dl></div>
+<div class="paragraph"><p>From a <code>cmd.exe</code> shell, run the command <code>gclient</code> (without arguments). On first
+run, gclient will install all the Windows-specific bits needed to work with the
+code, including msysgit and python.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">
+<div class="ulist"><ul>
+<li>
+<p>
+If you run gclient from a non-cmd shell (e.g., cygwin, PowerShell), it
+ may appear to run properly, but msysgit, python, and other tools may not get
+ installed correctly.
+</p>
+</li>
+<li>
+<p>
+If you see strange errors with the file system on the first run of gclient,
+ you may want to <a href="http://tortoisesvn.tigris.org/faq.html#cantmove2">disable
+ Windows Indexing</a>.
+</p>
+</li>
+<li>
+<p>
+If you are running Windows XP and see errors like &#8220;The system cannot execute
+ the specified program&#8221;, try installing the
+ <a href="http://code.google.com/p/chromium/issues/detail?id=75886">&#8220;Microsoft
+ Visual C++ 2008 Redistributable Package&#8221;</a>.
+</p>
+</li>
+</ul></div>
+</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect2">
+<h3 id="_bootstrapping_configuration">BOOTSTRAPPING CONFIGURATION</h3>
+<div class="paragraph"><p>If you have never used git before, you’ll need to set some global git
+configurations; substitute your name and email address in the following
+commands:</p></div>
+<div class="listingblock">
+<div class="content">
+<pre><code><strong><span class="white">$ git config --global user.name &#8220;John Doe&#8221;</span></strong>
+<strong><span class="white">$ git config --global user.email &#8220;jdoe@email.com&#8221;</span></strong>
+<strong><span class="white">$ git config --global core.autocrlf false</span></strong>
+<strong><span class="white">$ git config --global core.filemode false</span></strong>
+<strong><span class="white">$</span></strong> # and for fun!
+<strong><span class="white">$ git config --global color.ui true</span></strong></code></pre>
+</div></div>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_getting_the_code">GETTING THE CODE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Pick an empty directory and run one of the following:</p></div>
+<div class="listingblock">
+<div class="content">
+<pre><code><strong><span class="white">$ fetch chromium</span></strong> # Basic checkout for desktop Chromium
+<strong><span class="white">$ fetch blink</span></strong> # Chromium code with Blink checked out to tip-of-tree
+<strong><span class="white">$ fetch android</span></strong> # Chromium checkout for Android platform
+<strong><span class="white">$ fetch ios</span></strong> # Chromium checkout for iOS platform</code></pre>
+</div></div>
+<div class="paragraph"><p>When the <code>fetch</code> tool completes you should have the following in your working
+directory:</p></div>
+<div class="listingblock">
+<div class="content">
+<pre><code><strong><span class="white">.gclient</span></strong> # A configuration file for you source checkout
+<strong><span class="white">src/</span></strong> # Top-level Chromium source checkout.</code></pre>
+</div></div>
+<div class="paragraph"><p>If you are on linux, then you&#8217;ll need to run:</p></div>
+<div class="listingblock">
+<div class="content">
+<pre><code><strong><span class="white">$ cd src &amp;&amp; ./build/install-build-deps.sh</span></strong></code></pre>
+</div></div>
+<div class="paragraph"><p>And finally:</p></div>
+<div class="listingblock">
+<div class="content">
+<pre><code><strong><span class="white">$ gclient sync</span></strong> <b>&lt;1&gt;</b></code></pre>
+</div></div>
+<div class="colist arabic"><ol>
+<li>
+<p>
+This will pull all dependencies of the Chromium src checkout. You will need
+to run this any time you update the main src checkout.
+</p>
+</li>
+</ol></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_tl_dr_walkthrough">TL;DR WALKTHROUGH</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>This section will demo what a typical workflow looks like when writing, updating,
+and committing multiple CLs.</p></div>
+<div class="paragraph"><p></p></div><div class="listingblock"><div class="content"><pre><code><span style="font-weight: bold; color: #ffffff">$ fetch chromium</span>
+... truncated output ...
+<span style="font-weight: bold; color: #ffffff">$ cd src</span>
+</code></pre></div></div><p><div class="paragraph"> (only on linux)</p></div><div class="listingblock"><div class="content"><pre><code><span style="font-weight: bold; color: #ffffff">$ ./build/install-build-deps.sh</span>
+... truncated output ...
+</code></pre></div></div><p><div class="paragraph"> Pull in all dependencies for HEAD</p></div><div class="listingblock"><div class="content"><pre><code><span style="font-weight: bold; color: #ffffff">$ gclient sync</span>
+... truncated output ...
+</code></pre></div></div><p><div class="paragraph"> Let's fix something!</p></div><div class="listingblock"><div class="content"><pre><code><span style="font-weight: bold; color: #ffffff">$ git new-branch fix_typo</span>
+<span style="font-weight: bold; color: #ffffff">$ echo -e '/Banana\ns/Banana/Kuun\nwq' | ed build/whitespace_file.txt</span>
+1503
+It was a Domo-Banana.
+It was a Domo-Kuun.
+1501
+<span style="font-weight: bold; color: #ffffff">$ git commit -am 'Fix terrible typo.'</span>
+[fix_typo 615ffa7] Fix terrible typo.
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+<span style="font-weight: bold; color: #ffffff">$ git map</span>
+<span style="background-color: #492ee1"></span><span style="font-weight: bold; background-color: #492ee1">* </span><span style="font-weight: bold; color: #e42e16; background-color: #492ee1">615ffa7 </span><span style="color: #19c518"> (</span><span style="color: #33d6e5"></span><span style="font-weight: bold; color: #33d6e5">fix_typo</span><span style="font-weight: bold"></span><span style="font-weight: bold"></span><span style="color: #19c518">) </span><span style="color: #e7e71c">2014-04-10</span> ~ Fix terrible typo.
+* <span style="font-weight: bold; color: #e42e16">beec6f4 </span><span style="color: #19c518"> (</span><span style="color: #e42e16">origin/master</span><span style="color: #19c518">, </span><span style="color: #e42e16">origin/HEAD</span><span style="color: #19c518">) </span><span style="color: #e7e71c">2014-04-10</span> ~ Make ReflectorImpl use mailboxes<span style="font-weight: bold"></span><span style="font-weight: bold; color: #ffffff"> &lt;(fix_typo)</span><span style="font-weight: bold"></span><span style="font-weight: bold"></span>
+* <span style="font-weight: bold; color: #e42e16">41290e0 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ don't use glibc-specific execinfo.h on uclibc builds
+* <span style="font-weight: bold; color: #e42e16">a76fde7 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ [fsp] Add requestUnmount() method together with the request manager.
+* <span style="font-weight: bold; color: #e42e16">9de7a71 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ linux_aura: Use system configuration for middle clicking the titlebar.
+* <span style="font-weight: bold; color: #e42e16">073b0c2 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ ContentView-&gt;ContentViewCore in ContentViewRenderView
+* <span style="font-weight: bold; color: #e42e16">2250f53 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ ozone: evdev: Filter devices by path
+* <span style="font-weight: bold; color: #e42e16">33a7a74 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Always output seccomp error messages to stderr
+<span style="font-weight: bold; color: #ffffff">$ git status</span>
+On branch fix_typo
+Your branch is ahead of 'origin/master' by 1 commit.
+ (use "git push" to publish your local commits)
+
+nothing to commit, working directory clean
+<span style="font-weight: bold; color: #ffffff">$ git cl upload -r domo@chromium.org --send-mail</span>
+... truncated output ...
+</code></pre></div></div><p><div class="paragraph"> While we wait for feedback, let's do something else.</p></div><div class="listingblock"><div class="content"><pre><code><span style="font-weight: bold; color: #ffffff">$ git new-branch chap2</span>
+<span style="font-weight: bold; color: #ffffff">$ git map-branches</span>
+<span style="color: #e42e16"></span><span style="font-weight: bold; color: #e42e16">origin/master
+</span><span style="font-weight: bold; color: #33d6e5"></span><span style="font-weight: bold; color: #33d6e5"> chap2 *
+</span><span style="font-weight: bold; color: #19c518"></span><span style="color: #19c518"> fix_typo
+</span><span style="font-weight: bold; color: #ffffff">$ cat &gt;&gt; build/whitespace_file.txt &lt;&lt;EOF</span>
+
+"You recall what happened on Mulholland drive?" The ceiling fan rotated slowly
+overhead, barely disturbing the thick cigarette smoke. No doubt was left about
+when the fan was last cleaned.
+EOF
+<span style="font-weight: bold; color: #ffffff">$ git status</span>
+On branch chap2
+Your branch is up-to-date with 'origin/master'.
+
+Changes not staged for commit:
+ (use "git add &lt;file&gt;..." to update what will be committed)
+ (use "git checkout -- &lt;file&gt;..." to discard changes in working directory)
+
+ <span style="color: #e42e16">modified: build/whitespace_file.txt</span>
+
+no changes added to commit (use "git add" and/or "git commit -a")
+</code></pre></div></div><p><div class="paragraph"> Someone on the code review pointed out that our typo-fix has a typo :( We're still working on 'chap2' but we really want to land 'fix_typo', so let's switch over and fix it.</p></div><div class="listingblock"><div class="content"><pre><code><span style="font-weight: bold; color: #ffffff">$ git freeze</span>
+<span style="font-weight: bold; color: #ffffff">$ git checkout fix_typo</span>
+Switched to branch 'fix_typo'
+Your branch is ahead of 'origin/master' by 1 commit.
+ (use "git push" to publish your local commits)
+<span style="font-weight: bold; color: #ffffff">$ echo -e '/Kuun\ns/Kuun/Kun\nwq' | ed build/whitespace_file.txt</span>
+1501
+It was a Domo-Kuun.
+It was a Domo-Kun.
+1500
+<span style="font-weight: bold; color: #ffffff">$ git upstream-diff --wordwise</span>
+<span style="font-weight: bold">diff --git a/build/whitespace_file.txt b/build/whitespace_file.txt</span>
+<span style="font-weight: bold">index 3eba355..57cdcee 100644</span>
+<span style="font-weight: bold">--- a/build/whitespace_file.txt</span>
+<span style="font-weight: bold">+++ b/build/whitespace_file.txt</span>
+<span style="color: #33d6e5">@@ -17,7 +17,7 @@</span> swept up the streets (for it is in London that our scene lies), rattling along
+the housetops, and fiercely agitating the scanty flame of the lamps that
+struggled against the elements. A hooded figure emerged.
+
+It was a Domo-<span style="color: #e42e16">Banana</span><span style="color: #19c518">Kun</span>.
+
+"What took you so long?", inquired his wife.
+
+<span style="font-weight: bold; color: #ffffff">$ git commit -am 'Fix typo for good!'</span>
+[fix_typo 2c0ad9c] Fix typo for good!
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+<span style="font-weight: bold; color: #ffffff">$ git cl upload</span>
+... truncated output ...
+</code></pre></div></div><p><div class="paragraph"> Since we got lgtm, let the CQ land it.</p></div><div class="listingblock"><div class="content"><pre><code><span style="font-weight: bold; color: #ffffff">$ git cl set_commit</span>
+<span style="font-weight: bold; color: #ffffff">$ git map</span>
+* <span style="font-weight: bold; color: #e42e16">0e2e52e </span><span style="color: #19c518"> (</span><span style="color: #19c518"></span><span style="font-weight: bold; color: #19c518">chap2</span><span style="font-weight: bold"></span><span style="font-weight: bold"></span><span style="color: #19c518">) </span><span style="color: #e7e71c">2014-04-10</span> ~ FREEZE.unindexed
+<span style="color: #e42e16">|</span> <span style="background-color: #492ee1"></span><span style="font-weight: bold; background-color: #492ee1">* </span><span style="font-weight: bold; color: #e42e16; background-color: #492ee1">2c0ad9c </span><span style="color: #19c518"> (</span><span style="color: #33d6e5"></span><span style="font-weight: bold; color: #33d6e5">fix_typo</span><span style="font-weight: bold"></span><span style="font-weight: bold"></span><span style="color: #19c518">) </span><span style="color: #e7e71c">2014-04-10</span> ~ Fix typo for good!
+<span style="color: #e42e16">|</span> * <span style="font-weight: bold; color: #e42e16">615ffa7 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Fix terrible typo.
+<span style="color: #e42e16">|</span><span style="color: #e42e16">/</span>
+* <span style="font-weight: bold; color: #e42e16">beec6f4 </span><span style="color: #19c518"> (</span><span style="color: #e42e16">origin/master</span><span style="color: #19c518">, </span><span style="color: #e42e16">origin/HEAD</span><span style="color: #19c518">) </span><span style="color: #e7e71c">2014-04-10</span> ~ Make ReflectorImpl use mailboxes<span style="font-weight: bold"></span><span style="font-weight: bold; color: #ffffff"> &lt;(chap2, fix_typo)</span><span style="font-weight: bold"></span><span style="font-weight: bold"></span>
+* <span style="font-weight: bold; color: #e42e16">41290e0 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ don't use glibc-specific execinfo.h on uclibc builds
+* <span style="font-weight: bold; color: #e42e16">a76fde7 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ [fsp] Add requestUnmount() method together with the request manager.
+* <span style="font-weight: bold; color: #e42e16">9de7a71 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ linux_aura: Use system configuration for middle clicking the titlebar.
+* <span style="font-weight: bold; color: #e42e16">073b0c2 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ ContentView-&gt;ContentViewCore in ContentViewRenderView
+* <span style="font-weight: bold; color: #e42e16">2250f53 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ ozone: evdev: Filter devices by path
+* <span style="font-weight: bold; color: #e42e16">33a7a74 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Always output seccomp error messages to stderr
+</code></pre></div></div><p><div class="paragraph"> Switch back to where we were using the nav* commands (for fun... git checkout would work here too)</p></div><div class="listingblock"><div class="content"><pre><code><span style="font-weight: bold; color: #ffffff">$ git map-branches</span>
+<span style="color: #e42e16"></span><span style="color: #e42e16">origin/master
+</span><span style="color: #19c518"></span><span style="color: #19c518"> chap2
+</span><span style="color: #33d6e5"></span><span style="font-weight: bold; color: #33d6e5"> fix_typo *
+</span><span style="font-weight: bold; color: #ffffff">$ git nav-upstream</span>
+Note: checking out 'origin/master'.
+
+You are in 'detached HEAD' state. You can look around, make experimental
+changes and commit them, and you can discard any commits you make in this
+state without impacting any branches by performing another checkout.
+
+If you want to create a new branch to retain commits you create, you may
+do so (now or later) by using -b with the checkout command again. Example:
+
+ git checkout -b new_branch_name
+
+HEAD is now at beec6f4... Make ReflectorImpl use mailboxes
+<span style="font-weight: bold; color: #ffffff">$ git nav-downstream</span>
+Please select a downstream branch
+ 0. chap2
+ 1. fix_typo
+Selection (0-1)[0]: 0
+Previous HEAD position was beec6f4... Make ReflectorImpl use mailboxes
+Switched to branch 'chap2'
+Your branch is ahead of 'origin/master' by 1 commit.
+ (use "git push" to publish your local commits)
+<span style="font-weight: bold; color: #ffffff">$ git map-branches</span>
+<span style="color: #e42e16"></span><span style="color: #e42e16">origin/master
+</span><span style="color: #33d6e5"></span><span style="font-weight: bold; color: #33d6e5"> chap2 *
+</span><span style="font-weight: bold; color: #19c518"></span><span style="color: #19c518"> fix_typo
+</code></pre></div></div><p><div class="paragraph"> Now we can pick up on chapter2 where we left off.</p></div><div class="listingblock"><div class="content"><pre><code></span><span style="font-weight: bold; color: #ffffff">$ git thaw</span>
+<span style="font-weight: bold; color: #ffffff">$ git diff</span>
+<span style="font-weight: bold">diff --git a/build/whitespace_file.txt b/build/whitespace_file.txt</span>
+<span style="font-weight: bold">index 3eba355..9d08d9d 100644</span>
+<span style="font-weight: bold">--- a/build/whitespace_file.txt</span>
+<span style="font-weight: bold">+++ b/build/whitespace_file.txt</span>
+<span style="color: #33d6e5">@@ -34,3 +34,7 @@</span> with his fork, watching the runny jelly spread and pool across his plate,
+ like the blood of a dying fawn. \"It reminds me of that time --\" he started, as
+ his wife cut in quickly: \"-- please. I can't bear to hear it.\". A flury of
+ images coming from the past flowed through his mind.
+<span style="color: #19c518">+</span>
+<span style="color: #19c518">+</span><span style="color: #19c518">"You recall what happened on Mulholland drive?" The ceiling fan rotated slowly</span>
+<span style="color: #19c518">+</span><span style="color: #19c518">overhead, barely disturbing the thick cigarette smoke. No doubt was left about</span>
+<span style="color: #19c518">+</span><span style="color: #19c518">when the fan was last cleaned.</span>
+<span style="font-weight: bold; color: #ffffff">$ cat &gt;&gt; build/whitespace_file.txt &lt;&lt;EOF</span>
+
+There was an poignant pause.
+EOF
+<span style="font-weight: bold; color: #ffffff">$ git diff</span>
+<span style="font-weight: bold">diff --git a/build/whitespace_file.txt b/build/whitespace_file.txt</span>
+<span style="font-weight: bold">index 3eba355..e3a55de 100644</span>
+<span style="font-weight: bold">--- a/build/whitespace_file.txt</span>
+<span style="font-weight: bold">+++ b/build/whitespace_file.txt</span>
+<span style="color: #33d6e5">@@ -34,3 +34,9 @@</span> with his fork, watching the runny jelly spread and pool across his plate,
+ like the blood of a dying fawn. \"It reminds me of that time --\" he started, as
+ his wife cut in quickly: \"-- please. I can't bear to hear it.\". A flury of
+ images coming from the past flowed through his mind.
+<span style="color: #19c518">+</span>
+<span style="color: #19c518">+</span><span style="color: #19c518">"You recall what happened on Mulholland drive?" The ceiling fan rotated slowly</span>
+<span style="color: #19c518">+</span><span style="color: #19c518">overhead, barely disturbing the thick cigarette smoke. No doubt was left about</span>
+<span style="color: #19c518">+</span><span style="color: #19c518">when the fan was last cleaned.</span>
+<span style="color: #19c518">+</span>
+<span style="color: #19c518">+</span><span style="color: #19c518">There was an poignant pause.</span>
+<span style="font-weight: bold; color: #ffffff">$ git commit -am 'Finish chapter 2'</span>
+[chap2 ceef712] Finish chapter 2
+ 1 file changed, 6 insertions(+)
+<span style="font-weight: bold; color: #ffffff">$ git map</span>
+<span style="background-color: #492ee1"></span><span style="font-weight: bold; background-color: #492ee1">* </span><span style="font-weight: bold; color: #e42e16; background-color: #492ee1">ceef712 </span><span style="color: #19c518"> (</span><span style="color: #33d6e5"></span><span style="font-weight: bold; color: #33d6e5">chap2</span><span style="font-weight: bold"></span><span style="font-weight: bold"></span><span style="color: #19c518">) </span><span style="color: #e7e71c">2014-04-10</span> ~ Finish chapter 2
+<span style="color: #e42e16">|</span> * <span style="font-weight: bold; color: #e42e16">2c0ad9c </span><span style="color: #19c518"> (</span><span style="color: #19c518"></span><span style="font-weight: bold; color: #19c518">fix_typo</span><span style="font-weight: bold"></span><span style="font-weight: bold"></span><span style="color: #19c518">) </span><span style="color: #e7e71c">2014-04-10</span> ~ Fix typo for good!
+<span style="color: #e42e16">|</span> * <span style="font-weight: bold; color: #e42e16">615ffa7 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Fix terrible typo.
+<span style="color: #e42e16">|</span><span style="color: #e42e16">/</span>
+* <span style="font-weight: bold; color: #e42e16">beec6f4 </span><span style="color: #19c518"> (</span><span style="color: #e42e16">origin/master</span><span style="color: #19c518">, </span><span style="color: #e42e16">origin/HEAD</span><span style="color: #19c518">) </span><span style="color: #e7e71c">2014-04-10</span> ~ Make ReflectorImpl use mailboxes<span style="font-weight: bold"></span><span style="font-weight: bold; color: #ffffff"> &lt;(chap2, fix_typo)</span><span style="font-weight: bold"></span><span style="font-weight: bold"></span>
+* <span style="font-weight: bold; color: #e42e16">41290e0 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ don't use glibc-specific execinfo.h on uclibc builds
+* <span style="font-weight: bold; color: #e42e16">a76fde7 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ [fsp] Add requestUnmount() method together with the request manager.
+* <span style="font-weight: bold; color: #e42e16">9de7a71 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ linux_aura: Use system configuration for middle clicking the titlebar.
+* <span style="font-weight: bold; color: #e42e16">073b0c2 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ ContentView-&gt;ContentViewCore in ContentViewRenderView
+* <span style="font-weight: bold; color: #e42e16">2250f53 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ ozone: evdev: Filter devices by path
+* <span style="font-weight: bold; color: #e42e16">33a7a74 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Always output seccomp error messages to stderr
+<span style="font-weight: bold; color: #ffffff">$ git cl upload -r domo@chromium.org --send-mail</span>
+... truncated output ...
+</code></pre></div></div><p><div class="paragraph"> We poke a committer until they lgtm :)</p></div><div class="listingblock"><div class="content"><pre><code><span style="font-weight: bold; color: #ffffff">$ git cl set_commit</span>
+</code></pre></div></div><p><div class="paragraph"> While that runs through the CQ, let's get started on chapter 3. Since we know that chapter 3 depends on chapter 2, we'll track the current chapter2 branch.</p></div><div class="listingblock"><div class="content"><pre><code><span style="font-weight: bold; color: #ffffff">$ git new-branch --upstream_current chap3</span>
+<span style="font-weight: bold; color: #ffffff">$ cat &gt;&gt; build/whitespace_file.txt &lt;&lt;EOF</span>
+
+CHAPTER 3:
+Mr. Usagi felt that something wasn't right. Shortly after the Domo-Kun left he
+began feeling sick.
+EOF
+<span style="font-weight: bold; color: #ffffff">$ git commit -am 'beginning of chapter 3'</span>
+[chap3 7d4238a] beginning of chapter 3
+ 1 file changed, 4 insertions(+)
+<span style="font-weight: bold; color: #ffffff">$ git map</span>
+<span style="background-color: #492ee1"></span><span style="font-weight: bold; background-color: #492ee1">* </span><span style="font-weight: bold; color: #e42e16; background-color: #492ee1">7d4238a </span><span style="color: #19c518"> (</span><span style="color: #33d6e5"></span><span style="font-weight: bold; color: #33d6e5">chap3</span><span style="font-weight: bold"></span><span style="font-weight: bold"></span><span style="color: #19c518">) </span><span style="color: #e7e71c">2014-04-10</span> ~ beginning of chapter 3
+* <span style="font-weight: bold; color: #e42e16">ceef712 </span><span style="color: #19c518"> (</span><span style="color: #19c518"></span><span style="font-weight: bold; color: #19c518">chap2</span><span style="font-weight: bold"></span><span style="font-weight: bold"></span><span style="color: #19c518">) </span><span style="color: #e7e71c">2014-04-10</span> ~ Finish chapter 2<span style="font-weight: bold"></span><span style="font-weight: bold; color: #ffffff"> &lt;(chap3)</span><span style="font-weight: bold"></span><span style="font-weight: bold"></span>
+<span style="color: #e42e16">|</span> * <span style="font-weight: bold; color: #e42e16">2c0ad9c </span><span style="color: #19c518"> (</span><span style="color: #19c518"></span><span style="font-weight: bold; color: #19c518">fix_typo</span><span style="font-weight: bold"></span><span style="font-weight: bold"></span><span style="color: #19c518">) </span><span style="color: #e7e71c">2014-04-10</span> ~ Fix typo for good!
+<span style="color: #e42e16">|</span> * <span style="font-weight: bold; color: #e42e16">615ffa7 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Fix terrible typo.
+<span style="color: #e42e16">|</span><span style="color: #e42e16">/</span>
+* <span style="font-weight: bold; color: #e42e16">beec6f4 </span><span style="color: #19c518"> (</span><span style="color: #e42e16">origin/master</span><span style="color: #19c518">, </span><span style="color: #e42e16">origin/HEAD</span><span style="color: #19c518">) </span><span style="color: #e7e71c">2014-04-10</span> ~ Make ReflectorImpl use mailboxes<span style="font-weight: bold"></span><span style="font-weight: bold; color: #ffffff"> &lt;(chap2, fix_typo)</span><span style="font-weight: bold"></span><span style="font-weight: bold"></span>
+* <span style="font-weight: bold; color: #e42e16">41290e0 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ don't use glibc-specific execinfo.h on uclibc builds
+* <span style="font-weight: bold; color: #e42e16">a76fde7 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ [fsp] Add requestUnmount() method together with the request manager.
+* <span style="font-weight: bold; color: #e42e16">9de7a71 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ linux_aura: Use system configuration for middle clicking the titlebar.
+* <span style="font-weight: bold; color: #e42e16">073b0c2 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ ContentView-&gt;ContentViewCore in ContentViewRenderView
+* <span style="font-weight: bold; color: #e42e16">2250f53 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ ozone: evdev: Filter devices by path
+* <span style="font-weight: bold; color: #e42e16">33a7a74 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Always output seccomp error messages to stderr
+</code></pre></div></div><p><div class="paragraph"> We haven't updated the code in a while, so let's do that now.</p></div><div class="listingblock"><div class="content"><pre><code><span style="font-weight: bold; color: #ffffff">$ git rebase-update</span>
+Fetching origin
+From /Users/iannucci/chromium/depot_tools/docs/src/demo_repo
+ beec6f4..59cdb73 master -&gt; origin/master
+Rebasing: chap2
+Rebasing: fix_typo
+Failed! Attempting to squash fix_typo ... Success!
+Rebasing: chap3
+Deleted branch fix_typo (was 5d26fec).
+Reparented chap3 to track origin/master (was tracking chap2)
+Deleted branch chap2 (was 5d26fec).
+</code></pre></div></div><p><div class="paragraph"> Well look at that. The CQ landed our typo and chapter2 branches already and git rebase-update cleaned them up for us.</p></div><div class="listingblock"><div class="content"><pre><code><span style="font-weight: bold; color: #ffffff">$ gclient sync</span>
+... truncated output ...
+<span style="font-weight: bold; color: #ffffff">$ git map</span>
+<span style="background-color: #492ee1"></span><span style="font-weight: bold; background-color: #492ee1">* </span><span style="font-weight: bold; color: #e42e16; background-color: #492ee1">93fe917 </span><span style="color: #19c518"> (</span><span style="color: #33d6e5"></span><span style="font-weight: bold; color: #33d6e5">chap3</span><span style="font-weight: bold"></span><span style="font-weight: bold"></span><span style="color: #19c518">) </span><span style="color: #e7e71c">2014-04-10</span> ~ beginning of chapter 3
+* <span style="font-weight: bold; color: #e42e16">5d26fec </span><span style="color: #19c518"> (</span><span style="color: #e42e16">origin/master</span><span style="color: #19c518">, </span><span style="color: #e42e16">origin/HEAD</span><span style="color: #19c518">) </span><span style="color: #e7e71c">2014-04-10</span> ~ Finish chapter 2<span style="font-weight: bold"></span><span style="font-weight: bold; color: #ffffff"> &lt;(chap3)</span><span style="font-weight: bold"></span><span style="font-weight: bold"></span>
+* <span style="font-weight: bold; color: #e42e16">df7fefb </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Revert 255617, due to it not tracking use of the link doctor page properly.
+* <span style="font-weight: bold; color: #e42e16">4b39cda </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Fix terrible typo.
+* <span style="font-weight: bold; color: #e42e16">248c5b6 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Temporarily CHECK(trial) in ChromeRenderProcessObserver::OnSetFieldTrialGroup.
+* <span style="font-weight: bold; color: #e42e16">8171df8 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Remove AMD family check for the flapper crypto accelerator.
+* <span style="font-weight: bold; color: #e42e16">d6a30d2 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Change the Pica load benchmark to listen for the polymer-ready event
+* <span style="font-weight: bold; color: #e42e16">beec6f4 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Make ReflectorImpl use mailboxes
+* <span style="font-weight: bold; color: #e42e16">41290e0 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ don't use glibc-specific execinfo.h on uclibc builds
+* <span style="font-weight: bold; color: #e42e16">a76fde7 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ [fsp] Add requestUnmount() method together with the request manager.
+* <span style="font-weight: bold; color: #e42e16">9de7a71 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ linux_aura: Use system configuration for middle clicking the titlebar.
+* <span style="font-weight: bold; color: #e42e16">073b0c2 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ ContentView-&gt;ContentViewCore in ContentViewRenderView
+* <span style="font-weight: bold; color: #e42e16">2250f53 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ ozone: evdev: Filter devices by path
+* <span style="font-weight: bold; color: #e42e16">33a7a74 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Always output seccomp error messages to stderr
+</code></pre></div></div><p><div class="paragraph"> Someone on IRC mentions that they actually landed a chapter 3 already! We should pull their changes before continuing. Brace for a code conflict!</p></div><div class="listingblock"><div class="content"><pre><code><span style="font-weight: bold; color: #ffffff">$ git rebase-update</span>
+Fetching origin
+From /Users/iannucci/chromium/depot_tools/docs/src/demo_repo
+ 5d26fec..59cdb73 master -&gt; origin/master
+Rebasing: chap2
+... lots of output, it's a conflict alright :(...
+<span style="font-weight: bold; color: #ffffff">$ git diff</span>
+<span style="font-weight: bold">diff --cc build/whitespace_file.txt</span>
+<span style="font-weight: bold">index 1293282,f903ea2..0000000</span>
+<span style="font-weight: bold">--- a/build/whitespace_file.txt</span>
+<span style="font-weight: bold">+++ b/build/whitespace_file.txt</span>
+<span style="color: #33d6e5">@@@ -42,4 -42,5 +42,9 @@@</span> when the fan was last cleaned
+ There was an poignant pause.
+
+ CHAPTER 3:
+<span style="color: #19c518">++&lt;&lt;&lt;&lt;&lt;&lt;&lt; HEAD</span>
+<span style="color: #19c518"> +Hilariousness! This chapter is awesome!</span>
+<span style="color: #19c518">++=======</span>
+<span style="color: #19c518">+ Mr. Usagi felt that something wasn't right. Shortly after the Domo-Kun left he</span>
+<span style="color: #19c518">+ began feeling sick.</span>
+<span style="color: #19c518">++&gt;&gt;&gt;&gt;&gt;&gt;&gt; beginning of chapter 3</span>
+</code></pre></div></div><p><div class="paragraph"> Oh, well, that's not too bad. In fact... that's a terrible chapter 3!</p></div><div class="listingblock"><div class="content"><pre><code><span style="font-weight: bold; color: #ffffff">$ $EDITOR build/whitespace_file.txt</span>
+... /me deletes bad chapter 3 ...
+<span style="font-weight: bold; color: #ffffff">$ git add build/whitespace_file.txt</span>
+<span style="font-weight: bold; color: #ffffff">$ git diff --cached</span>
+<span style="font-weight: bold">diff --git a/build/whitespace_file.txt b/build/whitespace_file.txt</span>
+<span style="font-weight: bold">index 1293282..f903ea2 100644</span>
+<span style="font-weight: bold">--- a/build/whitespace_file.txt</span>
+<span style="font-weight: bold">+++ b/build/whitespace_file.txt</span>
+<span style="color: #33d6e5">@@ -42,4 +42,5 @@</span> when the fan was last cleaned.
+ There was an poignant pause.
+
+ CHAPTER 3:
+<span style="color: #e42e16">-Hilariousness! This chapter is awesome!</span>
+<span style="color: #19c518">+</span><span style="color: #19c518">Mr. Usagi felt that something wasn't right. Shortly after the Domo-Kun left he</span>
+<span style="color: #19c518">+</span><span style="color: #19c518">began feeling sick.</span>
+</code></pre></div></div><p><div class="paragraph"> Much better</p></div><div class="listingblock"><div class="content"><pre><code><span style="font-weight: bold; color: #ffffff">$ git rebase --continue</span>
+Applying: beginning of chapter 3
+<span style="font-weight: bold; color: #ffffff">$ git rebase-update</span>
+Fetching origin
+chap3 up-to-date
+<span style="font-weight: bold; color: #ffffff">$ gclient sync</span>
+... truncated output ...
+<span style="font-weight: bold; color: #ffffff">$ git map</span>
+<span style="background-color: #492ee1"></span><span style="font-weight: bold; background-color: #492ee1">* </span><span style="font-weight: bold; color: #e42e16; background-color: #492ee1">1cb4f5b </span><span style="color: #19c518"> (</span><span style="color: #33d6e5"></span><span style="font-weight: bold; color: #33d6e5">chap3</span><span style="font-weight: bold"></span><span style="font-weight: bold"></span><span style="color: #19c518">) </span><span style="color: #e7e71c">2014-04-10</span> ~ beginning of chapter 3
+* <span style="font-weight: bold; color: #e42e16">59cdb73 </span><span style="color: #19c518"> (</span><span style="color: #e42e16">origin/master</span><span style="color: #19c518">, </span><span style="color: #e42e16">origin/HEAD</span><span style="color: #19c518">) </span><span style="color: #e7e71c">2014-04-10</span> ~ Refactor data interchange format.<span style="font-weight: bold"></span><span style="font-weight: bold; color: #ffffff"> &lt;(chap3)</span><span style="font-weight: bold"></span><span style="font-weight: bold"></span>
+* <span style="font-weight: bold; color: #e42e16">34676a3 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Ensure FS is exited for all not-in-same-page navigations.
+* <span style="font-weight: bold; color: #e42e16">7d4784e </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Add best chapter2 ever!
+* <span style="font-weight: bold; color: #e42e16">5d26fec </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Finish chapter 2
+* <span style="font-weight: bold; color: #e42e16">df7fefb </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Revert 255617, due to it not tracking use of the link doctor page properly.
+* <span style="font-weight: bold; color: #e42e16">4b39cda </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Fix terrible typo.
+* <span style="font-weight: bold; color: #e42e16">248c5b6 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Temporarily CHECK(trial) in ChromeRenderProcessObserver::OnSetFieldTrialGroup.
+* <span style="font-weight: bold; color: #e42e16">8171df8 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Remove AMD family check for the flapper crypto accelerator.
+* <span style="font-weight: bold; color: #e42e16">d6a30d2 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Change the Pica load benchmark to listen for the polymer-ready event
+* <span style="font-weight: bold; color: #e42e16">beec6f4 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Make ReflectorImpl use mailboxes
+* <span style="font-weight: bold; color: #e42e16">41290e0 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ don't use glibc-specific execinfo.h on uclibc builds
+* <span style="font-weight: bold; color: #e42e16">a76fde7 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ [fsp] Add requestUnmount() method together with the request manager.
+* <span style="font-weight: bold; color: #e42e16">9de7a71 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ linux_aura: Use system configuration for middle clicking the titlebar.
+* <span style="font-weight: bold; color: #e42e16">073b0c2 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ ContentView-&gt;ContentViewCore in ContentViewRenderView
+* <span style="font-weight: bold; color: #e42e16">2250f53 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ ozone: evdev: Filter devices by path
+* <span style="font-weight: bold; color: #e42e16">33a7a74 </span><span style="color: #19c518"></span> <span style="color: #e7e71c">2014-04-10</span> ~ Always output seccomp error messages to stderr
+<span style="font-weight: bold; color: #ffffff">$ git cl upload</span>
+... truncated output ...
+</code></pre></div></div><p><div class="paragraph"></p></div>
+<div class="paragraph"><p>So there you have the basic flow. Note that you don&#8217;t <em>have</em> to do chromium
+development using these tools. Any git workflow is compatible, as long as
+<code>git cl upload</code> is able to upload good patches.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_creating_uploading_a_cl">CREATING / UPLOADING A CL</h2>
+<div class="sectionbody">
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">The remainder of the tutorial assumes that your current working directory
+is the <code>src/</code> folder mentioned in <a href="#_getting_the_code">Getting the code</a>.</td>
+</tr></table>
+</div>
+<div class="paragraph"><p>Each CL corresponds exactly with a single branch in git. Any time you want to
+begin a new CL, just:</p></div>
+<div class="listingblock">
+<div class="content">
+<pre><code><strong><span class="white">$ git new-branch &lt;branch_name&gt;</span></strong></code></pre>
+</div></div>
+<div class="paragraph"><p>This will create and checkout a new branch named <code>branch_name</code> which will track
+the default upstream (which is <code>origin/master</code>). See <a href="git-new-branch.html">git-new-branch(1)</a>
+for more features, such as the ability to track <em>LKGR</em>.</p></div>
+<div class="paragraph"><p>Commit as many changes as you like to this branch. When you want to upload it
+for review, run:</p></div>
+<div class="listingblock">
+<div class="content">
+<pre><code><strong><span class="white">$ git cl upload</span></strong></code></pre>
+</div></div>
+<div class="paragraph"><p>This will take the diff of your branch against its upstream (<code>origin/master</code>),
+and will post it to the <a href="https://codereview.chromium.org">Chromium code
+review site</a>.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_updating_the_code">UPDATING THE CODE</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Inevitably, you&#8217;ll want to pull in changes from the main Chromium repo. This is
+pretty easy with <em>depot_tools</em>:</p></div>
+<div class="listingblock">
+<div class="content">
+<pre><code><strong><span class="white">$ git rebase-update</span></strong></code></pre>
+</div></div>
+<div class="paragraph"><p>This command will update all of your CLs to contain the latest code from their
+upstreams. It will also automatically clean up CLs which have been committed and
+a couple other nice things. See <a href="git-rebase-update.html">git-rebase-update(1)</a> for the full
+scoop.</p></div>
+<div class="paragraph"><p>One thing to look out for are <em>merge conflicts</em>. These happen for exactly the
+same as they do with SVN, but the experience is a little more controllable with
+git. <code>git rebase-update</code> will try to rebase all your branches for you, but if it
+encounters a merge conflict in one, it will halt and leave you in a rebase
+conflict state (see <a href="git-rebase.html">git-rebase(1)</a>). Resolving <code>git rebase</code> merge
+conflicts is beyond the scope of this tutorial, but there are many good sources
+online (see the <a href="#_prerequisites">Prerequisites</a> for some).</p></div>
+<div class="paragraph"><p>Sometimes you&#8217;re pretty certain that you&#8217;ve committed a certain branch, but <code>git
+rebase-update</code> isn&#8217;t able to tell that for sure. This is usually because your
+branch doesn&#8217;t rebase cleanly. You could just delete the branch with <code>git branch
+-D &lt;branch&gt;</code>, but you&#8217;d like to double check the diff of your branch against its
+upstream before deleting it. If this is the case you can abort the rebase
+started by <code>git rebase-update</code>, and then run <a href="git-squash-branch.html">git-squash-branch(1)</a> to
+flatten your branch into a single commit. When you run <code>git rebase-update</code>
+again, you&#8217;ll get a (hopefully) much smaller / saner diff. If it turns out you
+were wrong about your branch being fully committed, you can use
+<a href="git-reflog.html">git-reflog(1)</a> to reset your branch back to where it was before. If the
+diff looks inconsequential, you can use <code>git rebase --skip</code> to ignore it, and
+then <code>git rebase-update</code> will clean it up for you.</p></div>
+<div class="paragraph"><p>Once you&#8217;re done resolving all of the merge conflict, just run <code>git
+rebase-update</code>, and it will pick up where it left off. Once the command has
+finished updating all of your branches, it will return you back to the branch
+you started on.</p></div>
+<div class="admonitionblock">
+<table><tr>
+<td class="icon">
+<div class="title">Note</div>
+</td>
+<td class="content">Running <code>git rebase-update</code> will update all your branches, but it will not
+automatically run <code>gclient sync</code> to update your dependencies.</td>
+</tr></table>
+</div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_managing_multiple_cls">MANAGING MULTIPLE CLS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Sometimes you want to work on more than one CL at once (say, you have a CL
+posted for review and want to work on something else). For each CL that you
+want to work on, just use <code>git new-branch &lt;branchname&gt;</code>.</p></div>
+<div class="paragraph"><p>Once you start to have more than one CL at a time, it can be easy to lose your
+bearings. Fortunately, <em>depot_tools</em> has two tools to help you out:</p></div>
+<div class="listingblock">
+<div class="content">
+<pre><code><strong><span class="white">$ git map</span></strong>
+<span class="white blue-background">*</span>&#8203;<strong><span class="blue-background red"> 7dcfe47 </span></strong> <span class="green">(</span>&#8203;<strong><span class="aqua">frozen_changes</span></strong>&#8203;<span class="green">)</span> <span class="yellow">2014-03-12</span> ~ FREEZE.unindexed
+* <strong><span class="red">4b0c180</span></strong> <span class="yellow">2014-03-12</span> ~ modfile
+* <strong><span class="red">59a7cca</span></strong> <span class="yellow">2014-03-12</span> ~ a deleted file
+* <strong><span class="red">6bec695</span></strong> <span class="green">(</span>&#8203;<span class="red">origin/master</span>&#8203;<span class="green">)</span> <span class="yellow">2014-03-11</span> ~ Add neat feature <strong><span class="white">&lt;(frozen_changes)</span></strong>
+* <strong><span class="red">d15a38a</span></strong> <span class="yellow">2014-03-11</span> ~ Epic README update
+* <strong><span class="red">d559894</span></strong> <span class="green">(</span>&#8203;<strong><span class="lime">master</span></strong>&#8203;<span class="green">)</span> <span class="yellow">2014-03-11</span> ~ Important upstream change
+<span class="red">|</span> * <strong><span class="red">9c311fd</span></strong> <span class="green">(</span>&#8203;<strong><span class="lime">cool_feature</span></strong>&#8203;<span class="green">)</span> <span class="yellow">2014-03-11</span> ~ Respond to CL comments
+<span class="red">|</span> <span class="green">|</span> * <strong><span class="red">2a1eeb2</span></strong> <span class="green">(</span>&#8203;<strong><span class="lime">subfeature</span></strong>&#8203;<span class="green">)</span> <span class="yellow">2014-03-11</span> ~ integrate with CoolService
+<span class="red">|</span> <span class="green">|</span> * <strong><span class="red">d777af6</span></strong> <span class="yellow">2014-03-11</span> ~ slick commenting action
+<span class="red">|</span> <span class="green">|/</span>
+<span class="red">|</span> * <strong><span class="red">265803a</span></strong> <span class="yellow">2014-03-11</span> ~ another improvement <strong><span class="white">&lt;(subfeature)</span></strong>
+<span class="red">|</span> * <strong><span class="red">6d831ac</span></strong> <span class="green">(</span>&#8203;<strong><span class="fuchsia">spleen_tag</span></strong>&#8203;<span class="green">)</span> <span class="yellow">2014-03-11</span> ~ Refactor spleen
+<span class="red">|</span> * <strong><span class="red">82e74ab</span></strong> <span class="yellow">2014-03-11</span> ~ Add widget
+<span class="red">|/</span>
+* <strong><span class="red">d08c5b3</span></strong> <span class="green">(</span>&#8203;<strong><span class="lime">bogus_noparent</span></strong>&#8203;<span class="green">)</span> <span class="yellow">2014-03-11</span> ~ Wonderful beginnings <strong><span class="white">&lt;(cool_feature)</span></strong></code></pre>
+</div></div>
+<div class="paragraph"><p>Note that this example repo is in dire need of a <a href="git-rebase-update.html">git-rebase-update(1)</a>!</p></div>
+<div class="listingblock">
+<div class="content">
+<pre><code><strong><span class="white">$ git map-branches</span></strong>
+<span class="red">origin/master</span>
+ <span class="green">cool_feature</span>
+ <span class="green">subfeature</span>
+ <span class="aqua">frozen_changes *</span>
+ <span class="green">master</span></code></pre>
+</div></div>
+<div class="dlist"><dl>
+<dt class="hdlist1">
+<a href="git-map.html">git-map(1)</a>
+</dt>
+<dd>
+<p>
+ This tool shows you the history of all of your branches in a pseudo-graphical
+ format. In particular, it will show you which commits all of your branches
+ are on, which commit you currently have checked out, and more. Check out the
+ doc for the full details.
+</p>
+</dd>
+<dt class="hdlist1">
+<a href="git-map-branches.html">git-map-branches(1)</a>
+</dt>
+<dd>
+<p>
+ This tool just shows you which branches you have in your repo, and thier
+ upstream relationship to each other (as well as which branch you have checked
+ out at the moment).
+</p>
+</dd>
+</dl></div>
+<div class="paragraph"><p>Additionally, sometimes you need to switch between branches, but you&#8217;ve got work
+in progress. You could use <a href="git-stash.html">git-stash(1)</a>, but that can be tricky to
+manage because you need to remember which branches you stashed what changes on.
+Helpfully <em>depot_tools</em> includes two tools which can greatly assist in case:</p></div>
+<div class="paragraph"><p><a href="git-freeze.html">git-freeze(1)</a> allows you to put the current branch in 'suspended
+animation' by committing your changes to a specially-named commit on the top of
+your current branch. When you come back to your branch later, you can just run
+<a href="git-thaw.html">git-thaw(1)</a> to get your work-in-progress changes back to what they were.</p></div>
+<div class="paragraph"><p>Another useful tool is <a href="git-rename-branch.html">git-rename-branch(1)</a>. Unlike <code>git branch -m &lt;old&gt;
+&lt;new&gt;</code>, this tool will correctly preserve the upstream relationships of your
+branch compared to its downstreams.</p></div>
+<div class="paragraph"><p>Finally, take a look at <a href="git-upstream-diff.html">git-upstream-diff(1)</a>. This will show you the
+combined diff for all the commits on your branch against the upstream tracking
+branch. This is <em>exactly</em> what <code>git cl upload</code> will push up to code review.
+Additionally, consider trying the <code>--wordwise</code> argument to get a colorized
+per-word diff (instead of a per-line diff).</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_managing_dependent_cls">MANAGING DEPENDENT CLS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Now that you know how to manage <em>independent</em> CLs, we&#8217;ll see how to manage
+<em>dependent</em> CLs. Dependent CLs are useful when your second (or third or fourth
+or &#8230;) CL depends on the changes in one of your other CLs (such as: CL 2 won&#8217;t
+compile without CL 1, but you want to submit them as two separate reviews).</p></div>
+<div class="paragraph"><p>Like all of the other CLs we&#8217;ve created, we use <a href="git-new-branch.html">git-new-branch(1)</a>, but
+this time with an extra argument. First, <code>git checkout</code> the branch
+you want to base the new one on (i.e. CL 1), and then run:</p></div>
+<div class="listingblock">
+<div class="content">
+<pre><code><strong><span class="white">$ git new-branch --upstream_current &lt;branch_name&gt;</span></strong></code></pre>
+</div></div>
+<div class="paragraph"><p>This will make a new branch which tracks the <em>current</em> branch as its upstream
+(as opposed to <em>origin/master</em>). All changes you commit to this branch will be
+in addition to the previous branch, but when you <code>git cl upload</code>, you will only
+upload the diff for the dependent (child) branch. You may have as many branches
+nested in this fashion as you like.</p></div>
+<div class="paragraph"><p><a href="git-map.html">git-map(1)</a> and <a href="git-map-branches.html">git-map-branches(1)</a> are particularly helpful when
+you have dependent branches. In addition, there are two helper commands which
+let you traverse your working copy up and down this tree of branches:
+<a href="git-nav-upstream.html">git-nav-upstream(1)</a> and <a href="git-nav-downstream.html">git-nav-downstream(1)</a>.</p></div>
+<div class="paragraph"><p>Sometimes when dealing with dependent CLs, it turns out that you accidentally
+based a branch on the wrong upstream, but since then you&#8217;ve committed changes to
+it, or even based <em>another</em> branch off of that one. Or you discover that you
+have two independent CLs that would actually be much better off as dependent
+CLs. In instances like these, you can check out the offending branch and use
+<a href="git-reparent-branch.html">git-reparent-branch(1)</a> to move it to track a different parent. Note that
+this can also be used to move a branch from tracking <code>origin/master</code> to <code>lkgr</code>
+or vice versa.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_conclusion">CONCLUSION</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Hopefully that gives you a good starting overview on Chromium development using
+<em>depot_tools</em>. If you have questions which weren&#8217;t answered by this tutorial or
+the man pages for the tools (see the index of all tools here:
+<a href="depot_tools.html">depot_tools(7)</a>), please feel free to ask.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_glossary">GLOSSARY</h2>
+<div class="sectionbody">
+<div class="dlist"><dl>
+<dt class="hdlist1">
+CL
+</dt>
+<dd>
+<p>
+ A <em>change-list</em>. This is a diff which you would like to commit to the
+ codebase.
+</p>
+</dd>
+<dt class="hdlist1">
+DEPS
+</dt>
+<dd>
+<p>
+ A file in the chromium checkout which <code>gclient sync</code> uses to determine what
+ dependencies to pull in. This file also contains <em>hooks</em>.
+</p>
+</dd>
+<dt class="hdlist1">
+LKGR
+</dt>
+<dd>
+<p>
+ Last Known Good Revision. This is a <a href="git-tag.html">git-tag(1)</a> which tracks the last
+ version of <code>origin/master</code> which has passed the full set of testing on the
+ <a href="http://build.chromium.org">main Chromium waterfall</a>.
+</p>
+</dd>
+</dl></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_chromium_depot_tools">CHROMIUM DEPOT_TOOLS</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>Part of the chromium <a href="depot_tools.html">depot_tools(7)</a> suite. These tools are meant to
+assist with the development of chromium and related projects. Download the tools
+from <a href="https://chromium.googlesource.com/chromium/tools/depot_tools.git">here</a>.</p></div>
+</div>
+</div>
+</div>
+<div id="footnotes"><hr /></div>
+<div id="footer">
+<div id="footer-text">
+Last updated 2014-04-10 21:30:33 PDT
+</div>
+</div>
+</body>
+</html>
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