Support for target

README.md

@@ -16,6 +16,7 @@ The accepted inputs are:
 | `dockerHubUser`   | String    |   | Only if `publish` is true         | User that will publish the image                 |
 | `dockerHubPassword`   | String    |   | Only if `publish` is true         | Password of the `dockerHubUser`                 |
 | `load`     | Boolean   | `false`   | No          | Indicate if you want to load image into docker |
+| `target`     | String   | ``   | No          | Set the target build stage to build |
 ## Example of usage
 
 ```

action.yml

@@ -26,6 +26,10 @@ inputs:
         description: "User that will publish the image, if indicated"
     dockerHubPassword:
         description: "Password of the dockerHubUser"
+    load:
+        description: "Indicate if you want to load image into docker"
+    target:
+        description: "Set the target build stage to build"
 runs:
     using: 'node12'
-    main: index.js
+    main: index.js

index.js

@@ -14,8 +14,9 @@ async function docker_buildx() {
         const load = extractInput('load', false, 'false').toLowerCase() === 'true';
         const platform = extractInput('platform', false, 'linux/amd64,linux/arm64,linux/arm/v7');
         const buildArg = extractInput('buildArg', false, '');
+        const target = extractInput('target', false, '');
         const buildFunction = publish ? buildAndPublish : buildOnly;
-        await buildFunction(platform, imageName, imageTag, dockerFile, buildArg, load);
+        await buildFunction(platform, imageName, imageTag, dockerFile, buildArg, load, target);
         cleanMyself();
     } catch (error) {
         core.setFailed(error.message);
@@ -46,15 +47,15 @@ async function executeShellScript(scriptName, ...parameters) {
     child_process.execSync(command, {stdio: 'inherit'});
 }
 
-async function buildAndPublish(platform, imageName, imageTag, dockerFile, buildArg, load) {
+async function buildAndPublish(platform, imageName, imageTag, dockerFile, buildArg, load, target) {
     const dockerHubUser = extractInput('dockerHubUser', true);
     const dockerHubPassword = extractInput('dockerHubPassword', true);
     await executeShellScript('dockerhub_login', dockerHubUser, dockerHubPassword);
-    await executeShellScript('docker_build', platform, imageName, imageTag, dockerFile, true, buildArg, load);
+    await executeShellScript('docker_build', platform, imageName, imageTag, dockerFile, true, buildArg, load, target);
 }
 
-async function buildOnly(platform, imageName, imageTag, dockerFile, buildArg, load) {
-    await executeShellScript('docker_build', platform, imageName, imageTag, dockerFile, false, buildArg, load);
+async function buildOnly(platform, imageName, imageTag, dockerFile, buildArg, load, target) {
+    await executeShellScript('docker_build', platform, imageName, imageTag, dockerFile, false, buildArg, load, target);
 }
 
 function cloneMyself() {

scripts/docker_build.sh

@@ -24,4 +24,10 @@ then
     LOAD="--load"
 fi
 
-docker buildx build --platform $1 $PUSH $LOAD $TAGS $BUILD_ARGS -f $4 .
+TARGET=
+if [ -z "$8" ];
+then
+   TARGET="--target $8"
+fi
+
+docker buildx build --platform $1 $PUSH $LOAD $TAGS $BUILD_ARGS $TARGET -f $4 .