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<a href="#package-manifest" title="Package Manifest" class="md-nav__link">
Package Manifest
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<article class="md-content__inner md-typeset">
<a href="https://github.com/vapor/documentation/edit/master/3.0/docs/getting-started/spm.md" title="Edit this page" class="md-icon md-content__icon">&#xE3C9;</a>
<h1 id="managing-your-project">Managing your project<a class="headerlink" href="#managing-your-project" title="Permanent link">&para;</a></h1>
<p>The Swift Package Manager (SPM for short) is used for building your project's source code and dependencies.
It's a similar idea to Cocoapods, Ruby gems, and NPM. Most of the time the <a href="../toolbox/">Vapor Toolbox</a> will
interact with SPM on your behalf. However, it's important to understand the basics.</p>
<div class="admonition tip">
<p class="admonition-title">Tip</p>
<p>Learn more about SPM on <a href="https://swift.org/package-manager/" target="_blank">Swift.org &rarr;</a> </p>
</div>
<h2 id="package-manifest">Package Manifest<a class="headerlink" href="#package-manifest" title="Permanent link">&para;</a></h2>
<p>The first place SPM looks in your project is the package manfiest. This should always be located in the root
directory of your project and named <code>Package.swift</code>.</p>
<h3 id="dependencies">Dependencies<a class="headerlink" href="#dependencies" title="Permanent link">&para;</a></h3>
<p>Dependencies are other SPM packages that your package relies on. All Vapor applications rely on the Vapor package,
but you can add as many other dependencies as you want.</p>
<div class="codehilite"><pre><span></span><span class="c1">// swift-tools-version:4.0</span>
<span class="kd">import</span> <span class="nc">PackageDescription</span>
<span class="kd">let</span> <span class="nv">package</span> <span class="p">=</span> <span class="n">Package</span><span class="p">(</span>
<span class="n">name</span><span class="p">:</span> <span class="s">&quot;VaporApp&quot;</span><span class="p">,</span>
<span class="n">dependencies</span><span class="p">:</span> <span class="p">[</span>
<span class="c1">// 💧 A server-side Swift web framework. </span>
<span class="p">.</span><span class="n">package</span><span class="p">(</span><span class="n">url</span><span class="p">:</span> <span class="s">&quot;https://github.com/vapor/vapor.git&quot;</span><span class="p">,</span> <span class="n">from</span><span class="p">:</span> <span class="s">&quot;3.0.0-rc&quot;</span><span class="p">),</span>
<span class="p">],</span>
<span class="n">targets</span><span class="p">:</span> <span class="p">[</span> <span class="p">...</span> <span class="p">]</span>
<span class="p">)</span>
</pre></div>
<p>In the above example, you can see <a href="https://github.com/vapor/vapor" target="_blank">vapor/vapor &rarr;</a> version 3.0
or later is a dependency of this package.
When you add a dependency to your package, you must next signal which <a href="#targets">targets</a> depend on
the newly available modules.</p>
<div class="admonition warning">
<p class="admonition-title">Warning</p>
<p>Anytime you modify the package manifest, call <code>vapor update</code> to effect the changes.</p>
</div>
<h3 id="targets">Targets<a class="headerlink" href="#targets" title="Permanent link">&para;</a></h3>
<p>Targets are all of the modules, executables, and tests that your package contains. </p>
<div class="codehilite"><pre><span></span><span class="c1">// swift-tools-version:4.0</span>
<span class="kd">import</span> <span class="nc">PackageDescription</span>
<span class="kd">let</span> <span class="nv">package</span> <span class="p">=</span> <span class="n">Package</span><span class="p">(</span>
<span class="n">name</span><span class="p">:</span> <span class="s">&quot;VaporApp&quot;</span><span class="p">,</span>
<span class="n">dependencies</span><span class="p">:</span> <span class="p">[</span> <span class="p">...</span> <span class="p">],</span>
<span class="n">targets</span><span class="p">:</span> <span class="p">[</span>
<span class="p">.</span><span class="n">target</span><span class="p">(</span><span class="n">name</span><span class="p">:</span> <span class="s">&quot;App&quot;</span><span class="p">,</span> <span class="n">dependencies</span><span class="p">:</span> <span class="p">[</span><span class="s">&quot;Vapor&quot;</span><span class="p">]),</span>
<span class="p">.</span><span class="n">target</span><span class="p">(</span><span class="n">name</span><span class="p">:</span> <span class="s">&quot;Run&quot;</span><span class="p">,</span> <span class="n">dependencies</span><span class="p">:</span> <span class="p">[</span><span class="s">&quot;App&quot;</span><span class="p">]),</span>
<span class="p">.</span><span class="n">testTarget</span><span class="p">(</span><span class="n">name</span><span class="p">:</span> <span class="s">&quot;AppTests&quot;</span><span class="p">,</span> <span class="n">dependencies</span><span class="p">:</span> <span class="p">[</span><span class="s">&quot;App&quot;</span><span class="p">]),</span>
<span class="p">]</span>
<span class="p">)</span>
</pre></div>
<p>Most Vapor apps will have three targets, although you can add as many as you like to organize your code.
Each target declares which modules it depends on. You must add module names here in order to <code>import</code> them in your code.
A target can depend on other targets in your project or any modules exposed by packages you've added to
the <a href="#dependencies">main dependencies</a> array.</p>
<div class="admonition tip">
<p class="admonition-title">Tip</p>
<p>Executable targets (targets that contain a <code>main.swift</code> file) cannot be imported by other modules.
This is why Vapor has both an <code>App</code> and a <code>Run</code> target.
Any code you include in <code>App</code> can be tested in the <code>AppTests</code>.</p>
</div>
<h2 id="folder-structure">Folder Structure<a class="headerlink" href="#folder-structure" title="Permanent link">&para;</a></h2>
<p>Below is the typical folder structure for an SPM package.</p>
<div class="codehilite"><pre><span></span>.
├── Sources
│ ├── App
│ │ └── (Source code)
│ └── Run
│ └── main.swift
├── Tests
│ └── AppTests
└── Package.swift
</pre></div>
<p>Each <code>.target</code> corresponds to a folder in the <code>Sources</code> folder.
Each <code>.testTarget</code> corresponds to a folder in the <code>Tests</code> folder.</p>
<h2 id="troubleshooting">Troubleshooting<a class="headerlink" href="#troubleshooting" title="Permanent link">&para;</a></h2>
<p>If you are experiencing problems with SPM, sometimes cleaning your project can help.</p>
<div class="codehilite"><pre><span></span>vapor clean
</pre></div>
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