small fixes

action.yml

@@ -40,7 +40,7 @@ inputs:
     description: "Prefix to be stripped from the tag"
     required: false
   platforms:
-    description: "Target platforms to build (separated by comma)"
+    description: "Target platforms to build (separated by comma); Example: linux/amd64,linux/arm64"
     required: false
   extra_args:
     description: "Additional arguments to be passed to the kaniko executor"

entrypoint.sh

@@ -87,13 +87,15 @@ runKaniko() {
     # https://github.com/GoogleContainerTools/kaniko/issues/1349
     IFS=''
     kaniko_cmd="executor ${1} --reproducible --force"
-    echo "Running kaniko command ${kaniko_cmd}"
+    echo "Running kaniko command: ${kaniko_cmd}"
     eval "${kaniko_cmd}"
 }
 
-if [ -n "$PLATFORMS" ]; then
+if [ -n "$INPUT_PLATFORMS" ]; then
     # Build image for all platforms, then push the manifest
-    platformArray=$(echo "$PLATFORMS" | sed 's/,/ /g' )
+    platformArray=$(echo "$INPUT_PLATFORMS" | sed 's/,/ /g' )
+    echo "Building for the following platforms: $platformArray"
+
     for platform in $platformArray; do
         platformFn=$(echo "$platform" | sed 's#/#-#g')
 
@@ -117,7 +119,7 @@ if [ -n "$PLATFORMS" ]; then
     fi
 
     manifest_cmd="crane index append $TAGS $DIGESTS"
-    echo "Running crane command ${manifest_cmd}"
+    echo "Running crane command: ${manifest_cmd}"
     IMAGE_TAG_DIGEST=$(eval "$manifest_cmd")
 else
     # Build and push image for the default platform
@@ -134,6 +136,6 @@ fi
 DIGEST=$(echo "$IMAGE_TAG_DIGEST" | cut -f2 -d '@')
 echo "image=$IMAGE" >> "$GITHUB_OUTPUT"
 echo "digest=$DIGEST" >> "$GITHUB_OUTPUT"
-echo "image-tag-digest=IMAGE_TAG_DIGEST" >> "$GITHUB_OUTPUT"
+echo "image-tag-digest=$IMAGE_TAG_DIGEST" >> "$GITHUB_OUTPUT"
 
 echo "🎉 Successfully built $IMAGE_TAG_DIGEST"