Add feature to pass extra args when pushing image (#19)

If a user wants to pass few extra args to push
command when pushing image, then they can pass
using 'extra-args' input parameter.

Signed-off-by: divyansh42 <diagrawa@redhat.com>

.github/workflows/verify-push.yaml

@@ -92,6 +92,8 @@ jobs:
           registry: ${{ env.IMAGE_REGISTRY }}/${{ secrets.REGISTRY_USER }}
           username: ${{ secrets.REGISTRY_USER }}
           password: ${{ secrets.REGISTRY_PASSWORD }}
+          extra-args: |
+            --disable-content-trust
       
       - name: Echo outputs
         run: |

README.md

@@ -68,7 +68,16 @@ Refer to the [`podman push`](http://docs.podman.io/en/latest/markdown/podman-man
     <td>digestfile</td>
     <td>No</td>
     <td>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 <code>digest</code> output.
+    The contents of this file are the <code>digest</code> output.</td>
+  </tr>
+
+  <tr>
+    <td>extra-args</td>
+    <td>No</td>
+    <td>Extra args to be passed to podman push.
+      Separate arguments by newline. Do not use quotes.</td>
+  </tr>
+
 </table>
 
 ## Action Outputs

action.yml

@@ -31,6 +31,11 @@ inputs:
       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: | 
+      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:

src/index.ts

@@ -3,6 +3,7 @@ import * as exec from "@actions/exec";
 import * as io from "@actions/io";
 import * as fs from "fs";
 import * as path from "path";
+import { splitByNewline } from "./util";
 
 interface ExecResult {
     exitCode: number;
@@ -44,6 +45,15 @@ async function run(): Promise<void> {
     const tlsVerify = core.getInput("tls-verify");
     const digestFileInput = core.getInput("digestfile");
 
+    const inputExtraArgsStr = core.getInput("extra-args");
+    let podmanExtraArgs: string[] = [];
+    if (inputExtraArgsStr) {
+        // transform the array of lines into an array of arguments
+        // by splitting over lines, then over spaces, then trimming.
+        const lines = splitByNewline(inputExtraArgsStr);
+        podmanExtraArgs = lines.flatMap((line) => line.split(" ")).map((arg) => arg.trim());
+    }
+
     imageToPush = `${imageInput}`;
     const registryPathList: string[] = [];
 
@@ -159,6 +169,10 @@ async function run(): Promise<void> {
             registryPath,
         ];
 
+        if (podmanExtraArgs.length > 0) {
+            args.push(...podmanExtraArgs);
+        }
+
         // check if tls-verify is not set to null
         if (tlsVerify) {
             args.push(`--tls-verify=${tlsVerify}`);

src/util.ts

@@ -0,0 +1,8 @@
+/***************************************************************************************************
+ *  Copyright (c) Red Hat, Inc. All rights reserved.
+ *  Licensed under the MIT License. See LICENSE file in the project root for license information.
+ **************************************************************************************************/
+
+export function splitByNewline(s: string): string[] {
+    return s.split(/\r?\n/);
+}