feat: Add target option

README.md

@@ -55,6 +55,7 @@ the most used values. So, technically there is a single required argument
 | skip_unchanged_digest | Avoids pushing the image if the build generated the same digest | false    |                 |
 | path                  | Path to the build context. Defaults to `.`                      | false    | .               |
 | tag_with_latest       | Tags the built image with additional latest tag                 | false    |                 |
+| target                | Sets the target stage to build                                  | false    |                 |
 
 **Here is where it gets specific, as the optional arguments become required depending on the registry targeted**
 

action.yml

@@ -51,6 +51,9 @@ inputs:
   tag_with_latest:
     description: "Tags the built image with additional latest tag"
     required: false
+  target:
+    description: Sets the target stage to build
+    required: false
 runs:
   using: "docker"
   image: "Dockerfile"

entrypoint.sh

@@ -58,6 +58,7 @@ export CACHE=$CACHE${INPUT_CACHE_REGISTRY:+" --cache-repo=$INPUT_CACHE_REGISTRY"
 export CACHE=$CACHE${INPUT_CACHE_DIRECTORY:+" --cache-dir=$INPUT_CACHE_DIRECTORY"}
 export CONTEXT="--context $GITHUB_WORKSPACE/$CONTEXT_PATH"
 export DOCKERFILE="--dockerfile $CONTEXT_PATH/${INPUT_BUILD_FILE:-Dockerfile}"
+export TARGET=${INPUT_TARGET:+"--target=$INPUT_TARGET"}
 
 if [ ! -z $INPUT_SKIP_UNCHANGED_DIGEST ]; then
     export DESTINATION="--no-push --digest-file digest"
@@ -68,7 +69,7 @@ else
     fi
 fi
 
-export ARGS="$CACHE $CONTEXT $DOCKERFILE $DESTINATION $INPUT_EXTRA_ARGS"
+export ARGS="$CACHE $CONTEXT $DOCKERFILE $TARGET $DESTINATION $INPUT_EXTRA_ARGS"
 
 cat <<EOF >/kaniko/.docker/config.json
 {
@@ -104,7 +105,7 @@ if [ ! -z $INPUT_SKIP_UNCHANGED_DIGEST ]; then
         export DESTINATION="$DESTINATION --destination $IMAGE_LATEST"  
     fi
 
-    export ARGS="$CACHE $CONTEXT $DOCKERFILE $DESTINATION $INPUT_EXTRA_ARGS"
+    export ARGS="$CACHE $CONTEXT $DOCKERFILE $TARGET $DESTINATION $INPUT_EXTRA_ARGS"
 
     echo "Pushing image..."