Add support for public ECR

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

README.md

@@ -18,7 +18,7 @@ GitHub Action to login against a Docker registry.
 ___
 
 * [Usage](#usage)
-  * [DockerHub](#dockerhub)
+  * [Docker Hub](#docker-hub)
   * [GitHub Packages Docker Registry](#github-packages-docker-registry)
   * [GitHub Container Registry](#github-container-registry)
   * [GitLab](#gitlab)
@@ -26,6 +26,7 @@ ___
   * [Google Container Registry (GCR)](#google-container-registry-gcr)
   * [Google Artifact Registry (GAR)](#google-artifact-registry-gar)
   * [AWS Elastic Container Registry (ECR)](#aws-elastic-container-registry-ecr)
+  * [AWS Public Elastic Container Registry (ECR)](#aws-public-elastic-container-registry-ecr)
   * [OCI Oracle Cloud Infrastructure Registry (OCIR)](#oci-oracle-cloud-infrastructure-registry-ocir)
 * [Customizing](#customizing)
   * [inputs](#inputs)
@@ -280,6 +281,66 @@ jobs:
 
 > Replace `<aws-account-number>` and `<region>` with their respective values.
 
+### AWS Public Elastic Container Registry (ECR)
+
+Use an IAM user with the [ability to push to ECR](https://docs.aws.amazon.com/AmazonECR/latest/userguide/ecr_managed_policies.html).
+Then create and download access keys and save `AWS_ACCESS_KEY_ID` and `AWS_SECRET_ACCESS_KEY` [as secrets](https://docs.github.com/en/actions/configuring-and-managing-workflows/creating-and-storing-encrypted-secrets#creating-encrypted-secrets-for-a-repository)
+in your GitHub repo.
+
+```yaml
+name: ci
+
+on:
+  push:
+    branches: master
+
+jobs:
+  login:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Login to Public ECR
+        uses: docker/login-action@v1
+        with:
+          registry: public.ecr.aws
+          username: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          password: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+        env:
+          AWS_REGION: <region>
+```
+
+> Replace `<region>` with its respective value (default `us-east-1`).
+
+You can also use the [Configure AWS Credentials](https://github.com/aws-actions/configure-aws-credentials) action in
+combination with this action:
+
+```yaml
+name: ci
+
+on:
+  push:
+    branches: master
+
+jobs:
+  login:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Configure AWS Credentials
+        uses: aws-actions/configure-aws-credentials@v1
+        with:
+          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+          aws-region: <region>
+      -
+        name: Login to Public ECR
+        uses: docker/login-action@v1
+        with:
+          registry: public.ecr.aws
+```
+
+> Replace `<region>` with its respective value.
+
 ### OCI Oracle Cloud Infrastructure Registry (OCIR)
 To push into OCIR in specific tenancy the [username](https://www.oracle.com/webfolder/technetwork/tutorials/obe/oci/registry/index.html#LogintoOracleCloudInfrastructureRegistryfromtheDockerCLI)
 must be placed in format `<tenancy>/<username>` (in case of federated tenancy use the format `<tenancy-namespace>/oracleidentitycloudservice/<username>`). 

__tests__/aws.test.ts

@@ -5,12 +5,24 @@ describe('isECR', () => {
   test.each([
     ['registry.gitlab.com', false],
     ['gcr.io', false],
-    ['012345678901.dkr.ecr.eu-west-3.amazonaws.com', true]
+    ['012345678901.dkr.ecr.eu-west-3.amazonaws.com', true],
+    ['public.ecr.aws', true]
   ])('given registry %p', async (registry, expected) => {
     expect(await aws.isECR(registry)).toEqual(expected);
   });
 });
 
+describe('isPubECR', () => {
+  test.each([
+    ['registry.gitlab.com', false],
+    ['gcr.io', false],
+    ['012345678901.dkr.ecr.eu-west-3.amazonaws.com', false],
+    ['public.ecr.aws', true]
+  ])('given registry %p', async (registry, expected) => {
+    expect(await aws.isPubECR(registry)).toEqual(expected);
+  });
+});
+
 describe('getCLI', () => {
   it('exists', async () => {
     const awsPath = await aws.getCLI();
@@ -45,10 +57,10 @@ describe('parseCLIVersion', () => {
 });
 
 describe('getRegion', () => {
-  test.each([['012345678901.dkr.ecr.eu-west-3.amazonaws.com', 'eu-west-3']])(
+  test.each([
-    'given registry %p',
+    ['012345678901.dkr.ecr.eu-west-3.amazonaws.com', 'eu-west-3'],
-    async (registry, expected) => {
+    ['public.ecr.aws', 'us-east-1']
+  ])('given registry %p', async (registry, expected) => {
     expect(await aws.getRegion(registry)).toEqual(expected);
-    }
+  });
-  );
 });

dist/index.js

@@ -3088,7 +3088,12 @@ function loginECR(registry, username, password) {
         const cliPath = yield aws.getCLI();
         const cliVersion = yield aws.getCLIVersion();
         const region = yield aws.getRegion(registry);
+        if (yield aws.isPubECR(registry)) {
+            core.info(`💡 AWS Public ECR detected with ${region} region`);
+        }
+        else {
             core.info(`💡 AWS ECR detected with ${region} region`);
+        }
         process.env.AWS_ACCESS_KEY_ID = username || process.env.AWS_ACCESS_KEY_ID;
         process.env.AWS_SECRET_ACCESS_KEY = password || process.env.AWS_SECRET_ACCESS_KEY;
         core.info(`⬇️ Retrieving docker login command through AWS CLI ${cliVersion} (${cliPath})...`);
@@ -4155,14 +4160,20 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.getDockerLoginCmd = exports.parseCLIVersion = exports.getCLIVersion = exports.execCLI = exports.getCLI = exports.getRegion = exports.isECR = void 0;
+exports.getDockerLoginCmd = exports.parseCLIVersion = exports.getCLIVersion = exports.execCLI = exports.getCLI = exports.getRegion = exports.isPubECR = exports.isECR = void 0;
 const semver = __importStar(__webpack_require__(383));
 const io = __importStar(__webpack_require__(436));
 const execm = __importStar(__webpack_require__(757));
 exports.isECR = (registry) => __awaiter(void 0, void 0, void 0, function* () {
-    return registry.includes('amazonaws');
+    return registry.includes('amazonaws') || (yield exports.isPubECR(registry));
+});
+exports.isPubECR = (registry) => __awaiter(void 0, void 0, void 0, function* () {
+    return registry === 'public.ecr.aws';
 });
 exports.getRegion = (registry) => __awaiter(void 0, void 0, void 0, function* () {
+    if (yield exports.isPubECR(registry)) {
+        return process.env.AWS_REGION || process.env.AWS_DEFAULT_REGION || 'us-east-1';
+    }
     return registry.substring(registry.indexOf('ecr.') + 4, registry.indexOf('.amazonaws'));
 });
 exports.getCLI = () => __awaiter(void 0, void 0, void 0, function* () {
@@ -4192,13 +4203,14 @@ exports.parseCLIVersion = (stdout) => __awaiter(void 0, void 0, void 0, function
     return semver.clean(matches[1]);
 });
 exports.getDockerLoginCmd = (cliVersion, registry, region) => __awaiter(void 0, void 0, void 0, function* () {
+    let ecrCmd = (yield exports.isPubECR(registry)) ? 'ecr-public' : 'ecr';
     if (semver.satisfies(cliVersion, '>=2.0.0')) {
-        return exports.execCLI(['ecr', 'get-login-password', '--region', region]).then(pwd => {
+        return exports.execCLI([ecrCmd, 'get-login-password', '--region', region]).then(pwd => {
             return `docker login --username AWS --password ${pwd} ${registry}`;
         });
     }
     else {
-        return exports.execCLI(['ecr', 'get-login', '--region', region, '--no-include-email']).then(dockerLoginCmd => {
+        return exports.execCLI([ecrCmd, 'get-login', '--region', region, '--no-include-email']).then(dockerLoginCmd => {
             return dockerLoginCmd;
         });
     }

src/aws.ts

@@ -3,10 +3,17 @@ import * as io from '@actions/io';
 import * as execm from './exec';
 
 export const isECR = async (registry: string): Promise<boolean> => {
-  return registry.includes('amazonaws');
+  return registry.includes('amazonaws') || (await isPubECR(registry));
+};
+
+export const isPubECR = async (registry: string): Promise<boolean> => {
+  return registry === 'public.ecr.aws';
 };
 
 export const getRegion = async (registry: string): Promise<string> => {
+  if (await isPubECR(registry)) {
+    return process.env.AWS_REGION || process.env.AWS_DEFAULT_REGION || 'us-east-1';
+  }
   return registry.substring(registry.indexOf('ecr.') + 4, registry.indexOf('.amazonaws'));
 };
 
@@ -39,12 +46,13 @@ export const parseCLIVersion = async (stdout: string): Promise<string> => {
 };
 
 export const getDockerLoginCmd = async (cliVersion: string, registry: string, region: string): Promise<string> => {
+  let ecrCmd = (await isPubECR(registry)) ? 'ecr-public' : 'ecr';
   if (semver.satisfies(cliVersion, '>=2.0.0')) {
-    return execCLI(['ecr', 'get-login-password', '--region', region]).then(pwd => {
+    return execCLI([ecrCmd, 'get-login-password', '--region', region]).then(pwd => {
       return `docker login --username AWS --password ${pwd} ${registry}`;
     });
   } else {
-    return execCLI(['ecr', 'get-login', '--region', region, '--no-include-email']).then(dockerLoginCmd => {
+    return execCLI([ecrCmd, 'get-login', '--region', region, '--no-include-email']).then(dockerLoginCmd => {
       return dockerLoginCmd;
     });
   }

src/docker.ts

@@ -44,7 +44,12 @@ export async function loginECR(registry: string, username: string, password: str
   const cliPath = await aws.getCLI();
   const cliVersion = await aws.getCLIVersion();
   const region = await aws.getRegion(registry);
+
+  if (await aws.isPubECR(registry)) {
+    core.info(`💡 AWS Public ECR detected with ${region} region`);
+  } else {
     core.info(`💡 AWS ECR detected with ${region} region`);
+  }
 
   process.env.AWS_ACCESS_KEY_ID = username || process.env.AWS_ACCESS_KEY_ID;
   process.env.AWS_SECRET_ACCESS_KEY = password || process.env.AWS_SECRET_ACCESS_KEY;