docker · ArunKumarT1995 · Aug 4, 2025 · Aug 15, 2025
diff --git a/README.md b/README.md
@@ -24,6 +24,7 @@ ___
   * [OCI Oracle Cloud Infrastructure Registry (OCIR)](#oci-oracle-cloud-infrastructure-registry-ocir)
   * [Quay.io](#quayio)
   * [DigitalOcean](#digitalocean-container-registry)
+  * [Multiple Registries](#multiple-registries)
 * [Customizing](#customizing)
   * [inputs](#inputs)
 * [Contributing](#contributing)
@@ -494,6 +495,34 @@ jobs:
           password: ${{ secrets.DIGITALOCEAN_ACCESS_TOKEN }}
 ```
 
+### Multiple Registries
+You can login to multiple registries by providing a multiline string for the registry input. Each registry will be processed sequentically using the same username and password.
+
+```yaml
+name: ci
+
+on:
+  push:
+    branches: main
+
+jobs:
+  login:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Login to Multiple Regsitries
+        uses: docker/login-action@v7
+        with:
+          registry: |
+            ghcr.io
+            docker.io
+            registry.gitlab.com
+          # for single registry, 
+          # registry: "ghcr.io"
+          username: ${{ vars.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_PASSWORD }}
+```
+
 ## Customizing
 
 ### inputs
@@ -502,7 +531,7 @@ The following inputs can be used as `step.with` keys:
 
 | Name       | Type   | Default | Description                                                                   |
 |------------|--------|---------|-------------------------------------------------------------------------------|
-| `registry` | String |         | Server address of Docker registry. If not set then will default to Docker Hub |
+| `registry` | String |         | Server address of Docker registry. If not set then will default to Docker Hub. Supports multiline string for multiplr registries. |
 | `username` | String |         | Username for authenticating to the Docker registry                            |
 | `password` | String |         | Password or personal access token for authenticating the Docker registry      |
 | `ecr`      | String | `auto`  | Specifies whether the given registry is ECR (`auto`, `true` or `false`)       |

diff --git a/__tests__/docker.test.ts b/__tests__/docker.test.ts
@@ -20,17 +20,34 @@ test('loginStandard calls exec', async () => {
 
   const username = 'dbowie';
   const password = 'groundcontrol';
-  const registry = 'https://ghcr.io';
+  // Define const registry as multiline input
+  const registry = `https://ghcr.io
+https://docker.io`;
 
-  await loginStandard(registry, username, password);
+  const registryArray = registry.split('\n').map(r => r.trim());
 
-  expect(execSpy).toHaveBeenCalledTimes(1);
-  const callfunc = execSpy.mock.calls[0];
-  if (callfunc && callfunc[1]) {
+  for (const reg of registryArray) {
+    await loginStandard(reg, username, password);
+  }
+
+  expect(execSpy).toHaveBeenCalledTimes(2);
+  const firstcall = execSpy.mock.calls[0];
+  if (firstcall && firstcall[1]) {
+    // we don't want to check env opt
+    firstcall[1].env = undefined;
+  }
+  expect(execSpy).toHaveBeenCalledWith(['login', '--password-stdin', '--username', username, registryArray[0]], {
+    input: Buffer.from(password),
+    silent: true,
+    ignoreReturnCode: true
+  });
+
+  const secondcall = execSpy.mock.calls[1];
+  if (secondcall && secondcall[1]) {
     // we don't want to check env opt
-    callfunc[1].env = undefined;
+    secondcall[1].env = undefined;
   }
-  expect(execSpy).toHaveBeenCalledWith(['login', '--password-stdin', '--username', username, registry], {
+  expect(execSpy).toHaveBeenCalledWith(['login', '--password-stdin', '--username', username, registryArray[1]], {
     input: Buffer.from(password),
     silent: true,
     ignoreReturnCode: true
@@ -48,17 +65,32 @@ test('logout calls exec', async () => {
     };
   });
 
-  const registry = 'https://ghcr.io';
+  const registry = `https://ghcr.io
+https://docker.io`;
 
-  await logout(registry);
+  const registryArray = registry.split('\n').map(r => r.trim());
 
-  expect(execSpy).toHaveBeenCalledTimes(1);
-  const callfunc = execSpy.mock.calls[0];
-  if (callfunc && callfunc[1]) {
+  for (const reg of registryArray) {
+    await logout(reg);
+  }
+
+  expect(execSpy).toHaveBeenCalledTimes(2);
+  const firstcall = execSpy.mock.calls[0];
+  if (firstcall && firstcall[1]) {
+    // we don't want to check env opt
+    firstcall[1].env = undefined;
+  }
+  expect(execSpy).toHaveBeenCalledWith(['logout', registryArray[0]], {
+    ignoreReturnCode: true
+  });
+
+  const secondcall = execSpy.mock.calls[1];
+  if (secondcall && secondcall[1]) {
     // we don't want to check env opt
-    callfunc[1].env = undefined;
+    secondcall[1].env = undefined;
   }
-  expect(execSpy).toHaveBeenCalledWith(['logout', registry], {
+
+  expect(execSpy).toHaveBeenCalledWith(['logout', registryArray[1]], {
     ignoreReturnCode: true
   });
 });
diff --git a/dist/index.js b/dist/index.js
diff --git a/dist/index.js.map b/dist/index.js.map
diff --git a/package.json b/package.json
@@ -47,4 +47,4 @@
     "ts-node": "^10.9.2",
     "typescript": "^5.4.5"
   }
-}
+}
diff --git a/src/context.ts b/src/context.ts
@@ -1,7 +1,7 @@
 import * as core from '@actions/core';
 
 export interface Inputs {
-  registry: string;
+  registry: string[];
   username: string;
   password: string;
   ecr: string;
@@ -10,7 +10,7 @@ export interface Inputs {
 
 export function getInputs(): Inputs {
   return {
-    registry: core.getInput('registry'),
+    registry: core.getMultilineInput('registry'),
     username: core.getInput('username'),
     password: core.getInput('password'),
     ecr: core.getInput('ecr'),

diff --git a/src/main.ts b/src/main.ts
@@ -4,18 +4,23 @@ import * as context from './context';
 import * as docker from './docker';
 import * as stateHelper from './state-helper';
 
+const input: context.Inputs = context.getInputs();
+
 export async function main(): Promise<void> {
-  const input: context.Inputs = context.getInputs();
   stateHelper.setRegistry(input.registry);
   stateHelper.setLogout(input.logout);
-  await docker.login(input.registry, input.username, input.password, input.ecr);
+  for (const reg of input.registry) {
+    await docker.login(reg, input.username, input.password, input.ecr);
+  }
 }
 
 async function post(): Promise<void> {
   if (!stateHelper.logout) {
     return;
   }
-  await docker.logout(stateHelper.registry);
+  for (const reg of input.registry) {
+    await docker.logout(reg);
+  }
 }
 
 actionsToolkit.run(main, post);
diff --git a/src/state-helper.ts b/src/state-helper.ts
@@ -3,8 +3,9 @@ import * as core from '@actions/core';
 export const registry = process.env['STATE_registry'] || '';
 export const logout = /true/i.test(process.env['STATE_logout'] || '');
 
-export function setRegistry(registry: string) {
-  core.saveState('registry', registry);
+export function setRegistry(registry: string[]) {
+  core.info(`Setting registry: ${registry.join(',')}`);
+  core.saveState('registry', registry.join(','));
 }
 
 export function setLogout(logout: boolean) {
-Original file line number
+Diff line change
@@ Expand Up / @@ -47,4 +47,4 @@ @@
         "ts-node": "^10.9.2",
         "typescript": "^5.4.5"
       }
-    }
+    }