feat: output built image reference

README.md

@@ -175,3 +175,9 @@ with:
 ```
 
 for the tag `pre-0.1` will push `kaniko:0.1`, as the `pre-` part will be stripped from the tag name.
+
+## Outputs
+
+### `image`
+
+Full reference to the built image with registry and tag.

action.yml

@@ -57,6 +57,9 @@ inputs:
   debug:
     description: Enables trace for entrypoint.sh
     required: false
+outputs:
+  image:
+    description: "Full reference to the built image with registry and tag"
 runs:
   using: "docker"
   image: "Dockerfile"

entrypoint.sh

@@ -90,6 +90,7 @@ EOF
 
 # https://github.com/GoogleContainerTools/kaniko/issues/1349
 /kaniko/executor --reproducible --force $ARGS
+echo "image=$IMAGE" >> $GITHUB_OUTPUT
 
 if [ ! -z $INPUT_SKIP_UNCHANGED_DIGEST ]; then
     export DIGEST=$(cat digest)