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

@@ -26,20 +26,22 @@ inputs:
     required: false
     default: 'true'
   digestfile:
-    description: | 
+    description: |
       After copying the image, write the digest of the resulting image to the file.
       By default, the filename will be determined from the image and tag.
       The contents of this file are the digest output.
     required: false
   extra-args:
-    description: | 
+    description: |
       Extra args to be passed to podman push.
       Separate arguments by newline. Do not use quotes - @actions/exec will do the quoting for you.
     required: false
-  
+
 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));
 }