Add back singular registry-path output

Fixes #29

Signed-off-by: Tim Etchells <tetchell@redhat.com>

README.md

@@ -86,13 +86,15 @@ Refer to the [`podman push`](http://docs.podman.io/en/latest/markdown/podman-man
 
 ## Action Outputs
 
-`registry-paths`: A JSON array of registry paths to which the tag(s) were pushed.<br>
-For example, `[ quay.io/username/spring-image:v1, quay.io/username/spring-image:latest ]`.
-
 `digest`: The pushed image digest, as written to the `digestfile`.<br>
 For example, `sha256:66ce924069ec4181725d15aa27f34afbaf082f434f448dc07a42daa3305cdab3`.
 For multiple tags, the digest is the same.
 
+`registry-paths`: A JSON array of registry paths to which the tag(s) were pushed.<br>
+For example, `[ quay.io/username/spring-image:v1, quay.io/username/spring-image:latest ]`.
+
+`registry-path`: The first element of `registry-paths`, as a string.
+
 ## Examples
 
 The example below shows how the `push-to-registry` action can be used to push an image created by the [buildah-build](https://github.com/redhat-actions/buildah-build) action.

action.yml

@@ -40,6 +40,8 @@ inputs:
 outputs:
   digest:
     description: 'The pushed image digest, as written to the "digestfile"'
+  registry-path:
+    description: 'The first element of registry-paths.'
   registry-paths:
     description: 'A JSON array of registry paths to which the tag(s) were pushed'
 runs:

src/generated/inputs-outputs.ts

@@ -60,6 +60,12 @@ export enum Outputs {
      * Default: None.
      */
     DIGEST = "digest",
+    /**
+     * The first element of registry-paths.
+     * Required: false
+     * Default: None.
+     */
+    REGISTRY_PATH = "registry-path",
     /**
      * A JSON array of registry paths to which the tag(s) were pushed
      * Required: false

src/index.ts

@@ -197,6 +197,7 @@ async function run(): Promise<void> {
         }
     }
 
+    core.setOutput(Outputs.REGISTRY_PATH, registryPathList[0]);
     core.setOutput(Outputs.REGISTRY_PATHS, JSON.stringify(registryPathList));
 }