backward compatibility with old images format

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

.github/workflows/ci.yml

@@ -241,7 +241,8 @@ jobs:
         id: docker_meta
         uses: ./
         with:
-          images: ${{ env.DOCKER_IMAGE }}
+          images: |
+            ${{ env.DOCKER_IMAGE }}
           tags: |
             type=schedule
             type=ref,event=branch

README.md

@@ -126,7 +126,8 @@ jobs:
         id: meta
         uses: docker/metadata-action@v3
         with:
-          images: name/app
+          images: |
+            name/app
           tags: |
             type=ref,event=branch
             type=ref,event=pr
@@ -203,7 +204,8 @@ jobs:
         id: meta
         uses: docker/metadata-action@v3
         with:
-          images: name/app
+          images: |
+            name/app
           tags: |
             type=ref,event=branch
             type=ref,event=pr
@@ -265,14 +267,9 @@ Following inputs can be used as `step.with` keys
 >   org.opencontainers.image.vendor=MyCompany
 > ```
 
-> `CSV` type is a comma-delimited string
-> ```yaml
-> images: name/app,ghcr.io/name/app
-> ```
-
 | Name                | Type   | Description                                              |
-|---------------------|----------|------------------------------------|
+|---------------------|--------|----------------------------------------------------------|
-| `images`            | List/CSV | List of Docker images to use as base name for tags |
+| `images`            | List   | List of Docker images to use as base name for tags       |
 | `tags`              | List   | List of [tags](#tags-input) as key-value pair attributes |
 | `flavor`            | List   | [Flavor](#flavor-input) to apply                         |
 | `labels`            | List   | List of custom labels                                    |
@@ -285,7 +282,7 @@ Following inputs can be used as `step.with` keys
 Following outputs are available
 
 | Name          | Type    | Description                                                                   |
-|---------------|---------|---------------------------------------|
+|---------------|---------|-------------------------------------------------------------------------------|
 | `version`     | String  | Docker image version                                                          |
 | `tags`        | String  | Docker tags                                                                   |
 | `labels`      | String  | Docker labels                                                                 |

__tests__/image.test.ts

@@ -16,6 +16,22 @@ describe('transform', () => {
       ] as Image[],
       false
     ],
+    [
+      [
+        `name/foo,name/bar`
+      ],
+      [
+        {
+          name: `name/foo`,
+          enable: true,
+        },
+        {
+          name: `name/bar`,
+          enable: true,
+        }
+      ] as Image[],
+      false
+    ],
     [
       [
         `name/foo`,
@@ -66,6 +82,9 @@ describe('transform', () => {
     ],
     [
       [`name=,enable=true`], undefined, true
+    ],
+    [
+      [`name/foo,name=name/bar,enable=true`], undefined, true
     ]
   ])('given %p', async (l: string[], expected: Image[], invalid: boolean) => {
     try {

src/context.ts

@@ -27,7 +27,7 @@ export function tmpDir(): string {
 
 export function getInputs(): Inputs {
   return {
-    images: getInputList('images'),
+    images: getInputList('images', true),
     tags: getInputList('tags', true),
     flavor: getInputList('flavor', true),
     labels: getInputList('labels', true),

src/image.ts

@@ -1,4 +1,5 @@
 import {parse} from 'csv-parse/sync';
+import * as core from '@actions/core';
 
 export interface Image {
   name: string;
@@ -6,7 +7,33 @@ export interface Image {
 }
 
 export function Transform(inputs: string[]): Image[] {
-  const images: Image[] = [];
+  let images: Image[] = [];
+
+  // backward compatibility with old format
+  if (inputs.length == 1) {
+    let newformat = false;
+    const fields = parse(inputs[0], {
+      relaxColumnCount: true,
+      skipEmptyLines: true
+    })[0];
+    for (const field of fields) {
+      const parts = field
+        .toString()
+        .split('=')
+        .map(item => item.trim());
+      if (parts.length == 1) {
+        images.push({name: parts[0].toLowerCase(), enable: true});
+      } else {
+        newformat = true;
+        break;
+      }
+    }
+    if (!newformat) {
+      return output(images);
+    }
+  }
+
+  images = [];
   for (const input of inputs) {
     const image: Image = {name: '', enable: true};
     const fields = parse(input, {
@@ -46,5 +73,14 @@ export function Transform(inputs: string[]): Image[] {
     }
     images.push(image);
   }
+  return output(images);
+}
+
+function output(images: Image[]): Image[] {
+  core.startGroup(`Processing images input`);
+  for (const image of images) {
+    core.info(`name=${image.name},enable=${image.enable}`);
+  }
+  core.endGroup();
   return images;
 }