Parse image reference before push

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

src/docker.ts

@@ -0,0 +1,30 @@
+export interface Image {
+  registry?: string;
+  namespace?: string;
+  repository: string;
+  tag?: string;
+}
+
+export const parseImage = async (image: string): Promise<Image | undefined> => {
+  const match = image.match(/^(?:([^\/]+)\/)?(?:([^\/]+)\/)?([^@:\/]+)(?:[@:](.+))?$/);
+  if (!match) {
+    return;
+  }
+
+  let res: Image = {
+    registry: match[1],
+    namespace: match[2],
+    repository: match[3],
+    tag: match[4]
+  };
+
+  if (!res.namespace && res.registry && !/[:.]/.test(res.registry)) {
+    res.namespace = res.registry;
+    res.registry = undefined;
+  }
+
+  res.registry = res.registry ? `${res.registry}/` : '';
+  res.namespace = res.namespace && res.namespace !== 'library' ? `${res.namespace}/` : '';
+  res.tag = res.tag && res.tag !== 'latest' ? `:${res.tag}` : '';
+  return res;
+};

src/main.ts

@@ -1,6 +1,7 @@
 import * as os from 'os';
 import * as buildx from './buildx';
 import {Inputs, loadInputs, mustBuildx} from './context-helper';
+import {Image, parseImage} from './docker';
 import * as core from '@actions/core';
 import * as exec from '@actions/exec';
 
@@ -84,10 +85,14 @@ async function run(): Promise<void> {
     if (!buildxEnabled && inputs.push) {
       let pushRepos: Array<string> = [];
       await asyncForEach(inputs.tags, async tag => {
-        const repo = tag.split(':', -1)[0];
+        const img: Image | undefined = await parseImage(tag);
+        if (!img) {
+          core.warning(`Cannot parse image reference ${tag}`);
+          return;
+        }
+        const repo: string = `${img.registry}${img.namespace}${img.repository}`;
         if (!pushRepos.includes(repo)) {
           pushRepos.push(repo);
-
           core.info(`⬆️ Pushing ${repo}...`);
           await exec.exec('docker', ['push', repo]);
         }