Add optional target parameter for build

Introduced an optional target parameter in both 'action.yml' and 'index.js' to directly specify the target to build. Adjusted the build process in 'builder.js' to use this new target parameter when building, and also to reflect the target in the cache key.

build-project/action.yml

@@ -19,6 +19,10 @@ inputs:
     description: 'Build project for the host system regardless of LCNTP_TARGET_PLATFORM environment variable'
     required: false
     default: 'false'
+  target:
+    description: 'Target to build'
+    required: false
+    default: ''
 outputs:
   install-prefix:
     description: "Path to installed files"

build-project/builder.js

@@ -119,7 +119,7 @@ module.exports = async options => {
             }
         }
 
-        const cacheKey = `build-project-${buildFolder.join("/")}-${calculateSHA256(cmakeArgs.join(" "))}`;
+        const cacheKey = `build-project-target${options.target}-${buildFolder.join("/")}-${calculateSHA256(cmakeArgs.join(" "))}`;
 
         let needBuild = true;
         if (options.project !== ".") {
@@ -137,7 +137,12 @@ module.exports = async options => {
 
         if (needBuild) {
             await exec.exec(`cmake`, cmakeArgs);
-            await exec.exec(`cmake`, ["--build", buildDir]);
+
+            const buildArgs = ["--build", buildDir];
+            if (options.target) {
+                buildArgs.push("--target", options.target);
+            }
+            await exec.exec(`cmake`, buildArgs);
         }
 
         if (process.platform === "linux") {

build-project/index.js

@@ -8,11 +8,13 @@ async function run() {
     const extraCmakeArgs = core.getInput("extra-cmake-args");
     const arch = core.getInput("arch");
     const forceHostBuild = core.getInput("force-host-build");
+    const target = core.getInput("target");
 
     let options = {
       project: project,
       arch: arch,
-      forceHostBuild: forceHostBuild === "true"
+      forceHostBuild: forceHostBuild === "true",
+      target: target
     };
 
     if (commitish) options.commitish = commitish;