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kobalt-doc/getting-started/index.html
2016-01-20 15:59:05 -08:00

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<title>
Kobalt, by Cedric Beust
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<h2 class="section" id="downloading">1. Download Kobalt</h2>
<p>
<a href="https://github.com/cbeust/kobalt/releases/latest">Download the zip file</a> then unzip it in a location we'll call <code>KOBALT_HOME</code>:
</p>
<pre class="brush:plain">
cd $KOBALT_HOME
unzip kobalt-xxx.zip
</pre>
<p>
<em>Note: Kobalt doesn't need any environment variable to run, the environment variable used above
is only here for clarity.</em>
</p>
<h2 class="section" id="initialize">2. Initialize your project</h2>
<p>
Change to your project directory and call the <code>kobaltw</code> command with <code>--init</code>:
</p>
<pre class="brush:plain">
cd ~/java/project
$KOBALT_HOME/kobaltw --init
</pre>
<p>
This command will do two things:
</p>
<ol>
<li>Create a default <code>kobalt/src/Build.kt</code> file based on what was found in your project.
<li>Install the Kobalt Wrapper in your current directory (a script called <code>kobaltw</code>) and a few additional files in the <code>kobalt/wrapper</code> directory. From now on, you can just use <code>./kobaltw</code> to build and you can ignore <code>$KOBALT_HOME</code>.
</ol>
<p>
You can now attempt to build your project with Kobalt:
</p>
<pre class="brush:plain">
./kobaltw assemble
</pre>
If your project follows a regular build structure (e.g. <a href="https://maven.apache.org/guides/introduction/introduction-to-the-standard-directory-layout.html">Maven's hierarchy</a>), this should compile your file and create a .jar file. If not, you will have to make a few edits to your <code>Build.kt</code>.
As of this writing, Kobalt supports Java and Kotlin projects.
<h2 class="section" id="edit">3. Edit kobalt/src/Build.kt</h2>
Here is the <code>Build.kt</code> for the <a href="https://github.com/hhariri/wasabi/blob/master/kobalt/src/Build.kt">Wasabi HTTP framework</a>:
<pre class="brush:java">
import com.beust.kobalt.*
import com.beust.kobalt.plugin.packaging.assemble
import com.beust.kobalt.plugin.kotlin.*
val kotlinVersion = "1.0.0-beta-4583"
val p = kotlinProject {
name = "wasabi"
group = "com.example"
artifactId = name
version = "0.1"
// Tell Kobalt to also search here for dependencies
val repos = repos("http://oss.sonatype.org/content/repositories/snapshots")
dependencies {
compile("org.jetbrains.kotlin:kotlin-stdlib:" + kotlinVersion,
"org.jetbrains.kotlin:kotlin-reflect:" + kotlinVersion,
"io.netty:netty-all:4.0.31.Final",
"commons-codec:commons-codec:1.6",
"commons-logging:commons-logging:1.1.1",
"joda-time:joda-time:2.3")
}
// Test dependencies
dependenciesTest {
compile("junit:junit:4.9",
"org.mockito:mockito-all:1.9.5",
"org.apache.httpcomponents:httpclient:4.5.1")
}
// Tell kobalt to produce a fat jar and also the artifacts required for Maven
assemble {
jar {
fatJar=true
name = "wasabi-fat-" + version + ".jar"
}
mavenJars{
}
}
}
</pre>
<h2 class="section" id="idea-plugin">4. Sync your build file</h2>
<p>
If you're using Intellij IDEA, make sure you've <a href="../idea-plug-in/index.html">installed the Kobalt plugin</a> and then go to <code>Kobalt -> Sync Build File</code>. This will download dependencies in a way that IDEA understand so you no longer get errors.
</p>
<h2 class="section" id="next-steps">5. Next steps</h2>
<p>
From this point, you can either <a href="../idea-plug-in/index.html">learn how to install the Kobalt IDEA plug-in</a> or read <a href="../documentation/index.html">Kobalt's documentation</a>.
</p>
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