Allow multiple tags

Dockerfile

@@ -12,7 +12,7 @@ RUN wget -O /kaniko/jq \
     wget -O /kaniko/reg \
     https://github.com/genuinetools/reg/releases/download/v0.16.1/reg-linux-386 && \
     chmod +x /kaniko/reg && \
-    wget -O /crane.tar.gz \ 
+    wget -O /crane.tar.gz \
     https://github.com/google/go-containerregistry/releases/download/v0.8.0/go-containerregistry_Linux_x86_64.tar.gz && \
     tar -xvzf /crane.tar.gz crane -C /kaniko && \
     rm /crane.tar.gz

action.yml

@@ -21,8 +21,8 @@ inputs:
   image:
     description: "Image name"
     required: true
-  tag:
+  tags:
-    description: "Image tag"
+    description: "List of Image tags"
     required: false
   cache:
     description: "Enables build cache"

entrypoint.sh

@@ -7,13 +7,12 @@ fi
 export REGISTRY=${INPUT_REGISTRY:-"docker.io"}
 export IMAGE=${INPUT_IMAGE}
 export BRANCH=$(echo ${GITHUB_REF} | sed -E "s/refs\/(heads|tags)\///g" | sed -e "s/\//-/g")
-export TAG=${INPUT_TAG:-$([ "$BRANCH" == "master" ] && echo latest || echo $BRANCH)}
+export TAGS=${INPUT_TAGS:-$([ "$BRANCH" == "master" ] && echo latest || echo $BRANCH)}
-export TAG=${TAG:-"latest"}
+export TAGS=${TAGS:-"latest"}
-export TAG=${TAG#$INPUT_STRIP_TAG_PREFIX}
+export TAGS=${TAGS#$INPUT_STRIP_TAG_PREFIX}
 export USERNAME=${INPUT_USERNAME:-$GITHUB_ACTOR}
 export PASSWORD=${INPUT_PASSWORD:-$GITHUB_TOKEN}
 export REPOSITORY=$IMAGE
-export IMAGE=$IMAGE:$TAG
 export CONTEXT_PATH=${INPUT_PATH}
 
 if [[ "$INPUT_TAG_WITH_LATEST" == "true" ]]; then
@@ -31,52 +30,10 @@ ensure "${REGISTRY}" "registry"
 ensure "${USERNAME}" "username"
 ensure "${PASSWORD}" "password"
 ensure "${IMAGE}" "image"
-ensure "${TAG}" "tag"
+ensure "${TAGS}" "tags"
 ensure "${CONTEXT_PATH}" "path"
 
-if [ "$REGISTRY" == "ghcr.io" ]; then
+# Set credentials here
-    IMAGE_NAMESPACE="$(echo $GITHUB_REPOSITORY | tr '[:upper:]' '[:lower:]')"
-    export IMAGE="$IMAGE_NAMESPACE/$IMAGE"
-    export REPOSITORY="$IMAGE_NAMESPACE/$REPOSITORY"
-
-    if [ ! -z $IMAGE_LATEST ]; then
-        export IMAGE_LATEST="$IMAGE_NAMESPACE/$IMAGE_LATEST"
-    fi
-
-    if [ ! -z $INPUT_CACHE_REGISTRY ]; then
-        export INPUT_CACHE_REGISTRY="$REGISTRY/$IMAGE_NAMESPACE/$INPUT_CACHE_REGISTRY"
-    fi
-fi
-
-if [ "$REGISTRY" == "docker.io" ]; then
-    export REGISTRY="index.${REGISTRY}/v1/"
-else
-    export IMAGE="$REGISTRY/$IMAGE"
-
-    if [ ! -z $IMAGE_LATEST ]; then
-        export IMAGE_LATEST="$REGISTRY/$IMAGE_LATEST"
-    fi
-fi
-
-export CACHE=${INPUT_CACHE:+"--cache=true"}
-export CACHE=$CACHE${INPUT_CACHE_TTL:+" --cache-ttl=$INPUT_CACHE_TTL"}
-export CACHE=$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="--digest-file digest --no-push --tarPath image.tar --destination $IMAGE"
-else
-    export DESTINATION="--destination $IMAGE"
-    if [ ! -z $IMAGE_LATEST ]; then
-        export DESTINATION="$DESTINATION --destination $IMAGE_LATEST"  
-    fi
-fi
-
-export ARGS="$CACHE $CONTEXT $DOCKERFILE $TARGET $DESTINATION $INPUT_EXTRA_ARGS"
-
 cat <<EOF >/kaniko/.docker/config.json
 {
     "auths": {
@@ -88,6 +45,59 @@ cat <<EOF >/kaniko/.docker/config.json
 }
 EOF
 
+tags=$(echo $TAGS | tr "," "\n")
+
+for tag in $tags; do
+
+    export TAGGED_IMAGE=$IMAGE:$tag
+
+    if [ "$REGISTRY" == "ghcr.io" ]; then
+        IMAGE_NAMESPACE="$(echo $GITHUB_REPOSITORY | tr '[:upper:]' '[:lower:]')"
+        export TAGGED_IMAGE="$IMAGE_NAMESPACE/$IMAGE"
+        export REPOSITORY="$IMAGE_NAMESPACE/$REPOSITORY"
+
+        if [ ! -z $IMAGE_LATEST ]; then
+            export IMAGE_LATEST="$IMAGE_NAMESPACE/$IMAGE_LATEST"
+        fi
+
+        if [ ! -z $INPUT_CACHE_REGISTRY ]; then
+            export INPUT_CACHE_REGISTRY="$REGISTRY/$IMAGE_NAMESPACE/$INPUT_CACHE_REGISTRY"
+        fi
+    fi
+
+    if [ "$REGISTRY" == "docker.io" ]; then
+        export REGISTRY="index.${REGISTRY}/v1/"
+    else
+        export TAGGED_IMAGE="$REGISTRY/$TAGGED_IMAGE"
+
+        if [ ! -z $IMAGE_LATEST ]; then
+            export IMAGE_LATEST="$REGISTRY/$IMAGE_LATEST"
+        fi
+    fi
+
+    export DESTINATIONS="$DESTINATIONS --destination $TAGGED_IMAGE"
+
+done
+
+export CACHE=${INPUT_CACHE:+"--cache=true"}
+export CACHE=$CACHE${INPUT_CACHE_TTL:+" --cache-ttl=$INPUT_CACHE_TTL"}
+export CACHE=$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="--digest-file digest --no-push --tarPath image.tar $DESTINATIONS"
+else
+    export DESTINATION=$DESTINATIONS
+    if [ ! -z $IMAGE_LATEST ]; then
+        export DESTINATION="$DESTINATIONS --destination $IMAGE_LATEST"
+    fi
+fi
+
+export ARGS="$CACHE $CONTEXT $DOCKERFILE $TARGET $DESTINATION $INPUT_EXTRA_ARGS"
+
 # https://github.com/GoogleContainerTools/kaniko/issues/1349
 /kaniko/executor --reproducible --force $ARGS
 
@@ -105,13 +115,13 @@ if [ ! -z $INPUT_SKIP_UNCHANGED_DIGEST ]; then
     fi
 
     echo "Pushing image..."
-    
+
-    /kaniko/crane push image.tar $IMAGE
+    /kaniko/crane push image.tar $TAGGED_IMAGE
 
     if [ ! -z $IMAGE_LATEST ]; then
         echo "Tagging latest..."
-        /kaniko/crane tag $IMAGE latest  
+        /kaniko/crane tag $IMAGE latest
     fi
- 
+
     echo "Done 🎉️"
 fi