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09-collab.html
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<!DOCTYPE html>
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<head>
<meta charset="utf-8">
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<title>Software Carpentry: Version Control with Git</title>
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<body class="lesson">
<div class="container card">
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<a href="http://software-carpentry.org" title="Software Carpentry">
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<article>
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<div class="col-md-10 col-md-offset-1">
<a href="index.html"><h1 class="title">Version Control with Git</h1></a>
<h2 class="subtitle">Collaborating</h2>
<section class="objectives panel panel-warning">
<div class="panel-heading">
<h2 id="learning-objectives"><span class="glyphicon glyphicon-certificate"></span>Learning Objectives</h2>
</div>
<div class="panel-body">
<ul>
<li>Collaborate pushing to a common repository.</li>
</ul>
</div>
</section>
<p>For the next step, get into pairs. Pick one of your repositories on GitHub to use for collaboration.</p>
<aside class="callout panel panel-info">
<div class="panel-heading">
<h2 id="practicing-by-yourself"><span class="glyphicon glyphicon-pushpin"></span>Practicing by yourself</h2>
</div>
<div class="panel-body">
<p>If you’re working through this lesson on your own, you can carry on by opening a second terminal window, and switching to another directory (e.g. <code>/tmp</code>). This window will represent your partner, working on another computer. You won’t need to give anyone access on GitHub, because both ‘partners’ are you.</p>
</div>
</aside>
<p>The partner whose repository is being used needs to give the other person access. On GitHub, click the settings button on the right, then select Collaborators, and enter your partner’s username.</p>
<div class="figure">
<img src="fig/github-add-collaborators.png" alt="Adding collaborators on GitHub" />
<p class="caption">Adding collaborators on GitHub</p>
</div>
<p>The other partner should <code>cd</code> to another directory (so <code>ls</code> doesn’t show a <code>planets</code> folder), and then make a copy of this repository on your own computer:</p>
<pre class="sourceCode bash"><code class="sourceCode bash">$ <span class="kw">git</span> clone https://github.com/vlad/planets.git</code></pre>
<p>Replace ‘vlad’ with your partner’s username (the one who owns the repository).</p>
<p><code>git clone</code> creates a fresh local copy of a remote repository.</p>
<div class="figure">
<img src="fig/github-collaboration.svg" alt="After Creating Clone of Repository" />
<p class="caption">After Creating Clone of Repository</p>
</div>
<p>The new collaborator can now make a change in their copy of the repository:</p>
<pre class="sourceCode bash"><code class="sourceCode bash">$ <span class="kw">cd</span> planets
$ <span class="kw">nano</span> pluto.txt
$ <span class="kw">cat</span> pluto.txt</code></pre>
<pre class="output"><code>It is so a planet!</code></pre>
<pre class="sourceCode bash"><code class="sourceCode bash">$ <span class="kw">git</span> add pluto.txt
$ <span class="kw">git</span> commit -m <span class="st">"Some notes about Pluto"</span></code></pre>
<pre class="output"><code> 1 file changed, 1 insertion(+)
create mode 100644 pluto.txt</code></pre>
<p>then push the change to GitHub:</p>
<pre class="sourceCode bash"><code class="sourceCode bash">$ <span class="kw">git</span> push origin master</code></pre>
<pre class="output"><code>Counting objects: 4, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (2/2), done.
Writing objects: 100% (3/3), 306 bytes, done.
Total 3 (delta 0), reused 0 (delta 0)
To https://github.com/vlad/planets.git
9272da5..29aba7c master -> master</code></pre>
<p>Note that we didn’t have to create a remote called <code>origin</code>: Git does this automatically, using that name, when we clone a repository. (This is why <code>origin</code> was a sensible choice earlier when we were setting up remotes by hand.)</p>
<p>We can now download changes into the original repository on our machine:</p>
<pre class="sourceCode bash"><code class="sourceCode bash">$ <span class="kw">git</span> pull origin master</code></pre>
<pre class="output"><code>remote: Counting objects: 4, done.
remote: Compressing objects: 100% (2/2), done.
remote: Total 3 (delta 0), reused 3 (delta 0)
Unpacking objects: 100% (3/3), done.
From https://github.com/vlad/planets
* branch master -> FETCH_HEAD
Updating 9272da5..29aba7c
Fast-forward
pluto.txt | 1 +
1 file changed, 1 insertion(+)
create mode 100644 pluto.txt</code></pre>
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