Software Features - Declarative Gradle

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</span> </a> </li> </ul> </nav> </div> </div> </div> <div class="md-content" data-md-component="content"> <article class="md-content__inner md-typeset"> <a href="https://github.com/gradle/declarative-gradle/edit/main/docs/reference/software-features.md" title="Edit this page" class="md-content__button md-icon"> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M10 20H6V4h7v5h5v3.1l2-2V8l-6-6H6c-1.1 0-2 .9-2 2v16c0 1.1.9 2 2 2h4v-2m10.2-7c.1 0 .3.1.4.2l1.3 1.3c.2.2.2.6 0 .8l-1 1-2.1-2.1 1-1c.1-.1.2-.2.4-.2m0 3.9L14.1 23H12v-2.1l6.1-6.1 2.1 2.1Z"/></svg> </a> <a href="https://github.com/gradle/declarative-gradle/raw/main/docs/reference/software-features.md" title="View source of this page" class="md-content__button md-icon"> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M17 18c.56 0 1 .44 1 1s-.44 1-1 1-1-.44-1-1 .44-1 1-1m0-3c-2.73 0-5.06 1.66-6 4 .94 2.34 3.27 4 6 4s5.06-1.66 6-4c-.94-2.34-3.27-4-6-4m0 6.5a2.5 2.5 0 0 1-2.5-2.5 2.5 2.5 0 0 1 2.5-2.5 2.5 2.5 0 0 1 2.5 2.5 2.5 2.5 0 0 1-2.5 2.5M9.27 20H6V4h7v5h5v4.07c.7.08 1.36.25 2 .49V8l-6-6H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h4.5a8.15 8.15 0 0 1-1.23-2Z"/></svg> </a> <div><h1 id="software-features">Software Features<a class="headerlink" href="#software-features" title="Permanent link">#</a></h1> <p>Software features are capabilities that can be added to a project. They are optional and can be made available in a build by applying a plugin in the declarative settings file that registers the software feature in the build. Once a feature is available, it can be used in a build by referencing the feature in the project's declarative build file. If a project does not reference a feature, it will not be used in the build.</p> <p>For example, to make the software features associated with producing jvm software available in a build, the <code>jvm-ecosystem</code> plugin is applied in the declarative settings file:</p> <div class="language-kotlin highlight"><pre><span></span><code><span id="__span-0-1"><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="n">plugins</span><span class="w"> </span><span class="p">{</span> </span><span id="__span-0-2"><a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a><span class="w"> </span><span class="n">id</span><span class="p">(</span><span class="s">"org.gradle.experimental.jvm-ecosystem"</span><span class="p">)</span> </span><span id="__span-0-3"><a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a><span class="p">}</span> </span></code></pre></div> <p>Software features have three distinct components:</p> <h3 id="a-public-model">A Public Model<a class="headerlink" href="#a-public-model" title="Permanent link">#</a></h3> <p>This is the user-configurable model exposed in the declarative DSL. Configuring the model object on the target is also the trigger for applying the feature's implementation.</p> <h3 id="a-target">A Target<a class="headerlink" href="#a-target" title="Permanent link">#</a></h3> <p>The target is the object that the software feature is applied to. The public model is added as a configurable property of the target.</p> <h3 id="an-implementation">An Implementation<a class="headerlink" href="#an-implementation" title="Permanent link">#</a></h3> <p>The implementation is the build logic necessary to implement the capability the software feature provides. This is a plugin class that modifies the software feature's target and/or model in some way.</p> <h2 id="software-types">Software Types<a class="headerlink" href="#software-types" title="Permanent link">#</a></h2> <p>The most fundamental type of software feature is a Software Type. A Software Type is a collection of capabilities that are common to a particular type of software. For example, an <code>androidLibrary</code> software type is a collection of capabilities that are common to Android libraries. A <code>javaLibrary</code> software type is a collection of capabilities that are common to Java libraries. Software types are used to define the type of software that a project produces and target the <code>Project</code> object of a project it is applied to. They are applied by referencing the software type as a top-level block in the project's declarative build file.</p> <p>For example, to declare that a project produces a java library built for Java 11, the <code>javaLibrary</code> software type is applied to the project:</p> <div class="language-kotlin highlight"><pre><span></span><code><span id="__span-1-1"><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="n">javaLibrary</span><span class="w"> </span><span class="p">{</span> </span><span id="__span-1-2"><a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a><span class="w"> </span><span class="n">javaVersion</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="m">11</span> </span><span id="__span-1-3"><a id="__codelineno-1-3" name="__codelineno-1-3" href="#__codelineno-1-3"></a><span class="p">}</span> </span></code></pre></div> <p>A project can have only one software type applied to it.</p> <p>In the future, additional types of software features will be added to Declarative Gradle to provide more capabilities to projects. For instance, the ability to add additional capabilities to a software type in a composable way, or the ability to restrict the model of a software type to a subset of its capabilities.</p> <h2 id="shared-model-defaults">Shared Model Defaults<a class="headerlink" href="#shared-model-defaults" title="Permanent link">#</a></h2> <p>Shared Model Defaults are collections of settings that are applied to all projects in a build that use a given software type. They are shared across all projects in a build. These are declared by referencing the software type in the <code>defaults</code> block in the declarative settings file.</p> <p>For example, to declare that all projects that produce Java libraries should produce a library built for Java 11, the <code>javaLibrary</code> software type is configured in <code>settings.gradle.dcl</code>:</p> <div class="language-kotlin highlight"><pre><span></span><code><span id="__span-2-1"><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a><span class="n">defaults</span><span class="w"> </span><span class="p">{</span> </span><span id="__span-2-2"><a id="__codelineno-2-2" name="__codelineno-2-2" href="#__codelineno-2-2"></a><span class="w"> </span><span class="n">javaLibrary</span><span class="w"> </span><span class="p">{</span> </span><span id="__span-2-3"><a id="__codelineno-2-3" name="__codelineno-2-3" href="#__codelineno-2-3"></a><span class="w"> </span><span class="n">javaVersion</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="m">11</span> </span><span id="__span-2-4"><a id="__codelineno-2-4" name="__codelineno-2-4" href="#__codelineno-2-4"></a><span class="w"> </span><span class="p">}</span> </span><span id="__span-2-5"><a id="__codelineno-2-5" name="__codelineno-2-5" href="#__codelineno-2-5"></a><span class="p">}</span> </span></code></pre></div></div> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var tab,labels=set.querySelector(".tabbed-labels");for(tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type="button" class="md-top md-icon" data-md-component="top" hidden> 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