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| <h1 id="experimental-rust-bundle">Experimental Rust Bundle</h1> |
| <p>This experimental bundles shows that it is possible to write a bundle in Rust, it directly uses the Apache Celix C api |
| and is not intended to be used in production.</p> |
| <p>Ideally Rust support is done by adding a Rust API for Apache Celix and use that API for Rust bundles, the current |
| implementation only shows that is possible to write a bundle in Rust that gets called by Apache Celix framework.</p> |
| <h1 id="building">Building</h1> |
| <p>To build rust source the Corrosion cmake module is used. This module will be automatically downloaded when building |
| using <code>FetchContent_Declare</code>.</p> |
| <p>To actual build the rust source files both the rust compiler and cargo are required. For ubuntu this can be installed |
| using apt:</p> |
| <div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>sudo apt install rustc cargo |
| </span></span></code></pre></div><p>It is possible to define C bindings in rust manually, but this is a lot of work and error prone. Rust has a tool called |
| bindgen which can generate C bindings from a C header file. This is used to generate the C bindings for Apache Celix. |
| bindgen is used in the build.rs of the rust package <code>celix_bindings</code>.</p> |
| <p>It is also possible to run bindgen manually, for example:</p> |
| <div class="highlight"><pre tabindex="0" style="background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>cargo install bindgen <span style="color:#080;font-style:italic"># install bindgen, only needed once</span> |
| </span></span><span style="display:flex;"><span><span style="color:#b8860b">PATH</span><span style="color:#666">=</span><span style="color:#b8860b">$PATH</span>:<span style="color:#b8860b">$HOME</span>/.cargo/bin <span style="color:#080;font-style:italic"># add cargo bin to path</span> |
| </span></span><span style="display:flex;"><span> |
| </span></span><span style="display:flex;"><span><span style="color:#a2f">cd</span> misc/experimental/rust/celix_bindings |
| </span></span><span style="display:flex;"><span>bindgen -o src/celix_bindings.rs celix_bindings.h -- -I<celix_framework_include_dir> -I<celix_utils_include_dir> |
| </span></span></code></pre></div> |
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