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 <h1 class="page">Using Gradle artifact repositories</h1>
 <div class="sect1">
 <h2 id="downloading-different-versions-of-gradle_che"><a class="anchor" href="#downloading-different-versions-of-gradle_che"></a>Downloading different versions of Gradle</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>The recommended way to download any version of Gradle is by using the Gradle Wrapper script. If your project does not have a <code>gradle/wrapper</code> directory, run <code>$ gradle wrapper</code> to configure the Wrapper.</p>
 </div>
 <div class="ulist">
 <div class="title">Prerequisites</div>
 <ul>
 <li>
 <p>The Gradle Wrapper is present in your project.</p>
 </li>
 </ul>
 </div>
 <div class="paragraph">
 <div class="title">Procedure</div>
 <p>To download a Gradle version from a non-standard location, change your Wrapper settings in <code>/projects/&lt;your_project&gt;/gradle/wrapper/gradle-wrapper.properties</code>:</p>
 </div>
 <div class="ulist">
 <ul>
 <li>
 <p>Change the <code>distributionUrl</code> property to point to a URL of the Gradle distribution <code>ZIP</code> file:</p>
 <div class="listingblock">
 <div class="content">
 <pre>properties
 distributionUrl=http://&lt;url_to_gradle&gt;/gradle-6.1-bin.zip</pre>
 </div>
 </div>
 </li>
 </ul>
 </div>
 <div class="paragraph">
 <p>Alternatively, you may place a Gradle distribution zip file locally in <code>/project/gradle</code> in your workspace.</p>
 </div>
 <div class="ulist">
 <ul>
 <li>
 <p>Change the <code>distributionUrl</code> property to point to a local address of the Gradle distribution zip file:</p>
 <div class="listingblock">
 <div class="content">
 <pre>properties
 distributionUrl=file\:/projects/gradle/gradle-6.1-bin.zip</pre>
 </div>
 </div>
 </li>
 </ul>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="configuring-global-gradle-repositories_che"><a class="anchor" href="#configuring-global-gradle-repositories_che"></a>Configuring global Gradle repositories</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>Use an initialization script to configure global repositories for the workspace.
 Gradle performs extra configuration before projects are evaluated, and this configuration is used in each Gradle project from the workspace.</p>
 </div>
 <div class="paragraph">
 <div class="title">Procedure</div>
 <p>To set global repositories for Gradle that could be used in each Gradle project in the workspace, create an <code>init.gradle</code> script in the <code>~/.gradle/</code> directory:</p>
 </div>
 <div class="listingblock">
 <div class="content">
 <pre class="highlightjs highlight"><code class="language-groovy hljs" data-lang="groovy">allprojects {
   repositories {
     mavenLocal ()
     maven {
       url "http://repo.mycompany.com/maven"
       credentials {
         username "admin"
         password "my_password"
       }
     }
   }
 }</code></pre>
 </div>
 </div>
 <div class="paragraph">
 <p>This file configures Gradle to use a local Maven repository with the given credentials.</p>
 </div>
 <div class="admonitionblock note">
 <table>
 <tr>
 <td class="icon">
 <i class="fa icon-note" title="Note"></i>
 </td>
 <td class="content">
 <div class="paragraph">
 <p>The <code>~/.gradle</code> directory does not persist in the current Java plug-in versions, so you must create the <code>init.gradle</code> script at each workspace start in the Java plug-in sidecar container.</p>
 </div>
 </td>
 </tr>
 </table>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="using-self-signed-certificates-in-gradle-projects_che"><a class="anchor" href="#using-self-signed-certificates-in-gradle-projects_che"></a>Using self-signed certificates in Gradle projects</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>Internal artifact repositories often do not have a certificate signed by an authority that is trusted by default in Java. They are mainly signed by an internal company authority or are self-signed. Configure your tools to accept these certificates by adding them to the Java truststore.</p>
 </div>
 <div class="olist arabic">
 <div class="title">Procedure</div>
 <ol class="arabic">
 <li>
 <p>Obtain a server certificate file from the repository server. It is customary for administrators to provide certificates of internal artifact servers as Kubernetes secrets (see <a href="../../installation-guide/importing-untrusted-tls-certificates/" class="page">Importing untrusted TLS certificates to Che</a>). The relevant server certificates will be mounted in <code>/public-certs</code> in every container in the workspace.</p>
 <div class="olist loweralpha">
 <ol class="loweralpha" type="a">
 <li>
 <p>Copy the original Java truststore file:</p>
 <div class="listingblock">
 <div class="content">
 <pre>$ mkdir /projects/maven
 $ cp $JAVA_HOME/lib/security/cacerts /projects/maven/truststore.jks
 $ chmod +w /projects/maven/truststore.jks</pre>
 </div>
 </div>
 </li>
 <li>
 <p>Import the certificate into the Java truststore file</p>
 <div class="listingblock">
 <div class="content">
 <pre>$ keytool -import -noprompt -file /public-certs/nexus.cer -alias nexus -keystore /projects/maven/truststore.jks -storepass changeit
 Certificate was added to keystore</pre>
 </div>
 </div>
 </li>
 <li>
 <p>Upload the truststore file to <code>/projects/gradle/truststore.jks</code> to make it available for all containers.</p>
 </li>
 </ol>
 </div>
 </li>
 <li>
 <p>Add the truststore file in the Gradle container.</p>
 <div class="olist loweralpha">
 <ol class="loweralpha" type="a">
 <li>
 <p>Add the <code>javax.net.ssl</code> system property to the <code>JAVA_OPTS</code> environment variable:</p>
 <div class="listingblock">
 <div class="content">
 <pre class="highlightjs highlight"><code class="language-yaml hljs" data-lang="yaml">  - mountSources: true
     alias: maven
     type: dockerimage
     ...
     env:
        -name: JAVA_OPTS
         value: &gt;-
           -Duser.home=/projects/gradle
           -Djavax.net.ssl.trustStore=/projects/maven/truststore.jks
           -Djavax.net.ssl.trustStorePassword=changeit</code></pre>
 </div>
 </div>
 </li>
 </ol>
 </div>
 </li>
 </ol>
 </div>
 <div class="ulist">
 <div class="title">Additional resources</div>
 <ul>
 <li>
 <p><a href="https://docs.gradle.org/current/userguide/init_scripts.html">Gradle documentation about initialization scripts</a></p>
 </li>
 <li>
 <p><a href="https://docs.gradle.org/current/userguide/gradle_wrapper.html">The Gradle Wrapper documentation</a></p>
 </li>
 </ul>
 </div>
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