Fix add-hosts context

.github/workflows/ci.yml

@@ -416,7 +416,7 @@ jobs:
         if: always()
         uses: crazy-max/ghaction-dump-context@v1
 
-  addhost:
+  add-hosts:
     runs-on: ubuntu-latest
     steps:
       -
@@ -432,7 +432,7 @@ jobs:
           context: ./test
           file: ./test/addhost.Dockerfile
           tags: name/app:latest
-          add-host: |
+          add-hosts: |
             docker:10.180.0.1
             foo:10.0.0.1
       -

README.md

@@ -199,7 +199,7 @@ Following inputs can be used as `step.with` keys
 
 | Name                | Type     | Description                        |
 |---------------------|----------|------------------------------------|
-| `add-host`          | List/CSV | Add a [custom host-to-IP mapping](https://docs.docker.com/engine/reference/commandline/build/#add-entries-to-container-hosts-file---add-host) (e.g., `docker:10.180.0.1`) |
+| `add-hosts`         | List/CSV | List of [customs host-to-IP mapping](https://docs.docker.com/engine/reference/commandline/build/#add-entries-to-container-hosts-file---add-host) (e.g., `docker:10.180.0.1`) |
 | `allow`             | List/CSV | List of [extra privileged entitlement](https://github.com/docker/buildx/blob/master/docs/reference/buildx_build.md#allow) (e.g., `network.host,security.insecure`) |
 | `builder`           | String   | Builder instance (see [setup-buildx](https://github.com/docker/setup-buildx-action) action) |
 | `build-args`        | List     | List of build-time variables |

__tests__/context.test.ts

@@ -446,6 +446,7 @@ ccc`],
         ['context', '.'],
         ['tag', 'localhost:5000/name/app:latest'],
         ['file', './test/Dockerfile'],
+        ['add-hosts', 'docker:10.180.0.1,foo:10.0.0.1'],
         ['network', 'host'],
         ['load', 'false'],
         ['no-cache', 'false'],
@@ -455,6 +456,8 @@ ccc`],
       [
         'buildx',
         'build',
+        '--add-host', 'docker:10.180.0.1',
+        '--add-host', 'foo:10.0.0.1',
         '--file', './test/Dockerfile',
         '--iidfile', '/tmp/.docker-build-push-jest/iidfile',
         '--metadata-file', '/tmp/.docker-build-push-jest/metadata-file',
@@ -469,7 +472,7 @@ ccc`],
       new Map<string, string>([
         ['context', '.'],
         ['file', './test/Dockerfile'],
-        ['add-host', 'docker:10.180.0.1'],
+        ['add-hosts', 'docker:10.180.0.1\nfoo:10.0.0.1'],
         ['cgroup-parent', 'foo'],
         ['shm-size', '2g'],
         ['ulimit', `nofile=1024:1024
@@ -483,6 +486,7 @@ nproc=3`],
         'buildx',
         'build',
         '--add-host', 'docker:10.180.0.1',
+        '--add-host', 'foo:10.0.0.1',
         '--cgroup-parent', 'foo',
         '--file', './test/Dockerfile',
         '--iidfile', '/tmp/.docker-build-push-jest/iidfile',

action.yml

@@ -7,8 +7,8 @@ branding:
   color: 'blue'
 
 inputs:
-  add-host:
-    description: "Add a custom host-to-IP mapping (e.g., docker:10.180.0.1)"
+  add-hosts:
+    description: "List of a customs host-to-IP mapping (e.g., docker:10.180.0.1)"
     required: false
   allow:
     description: "List of extra privileged entitlement (e.g., network.host,security.insecure)"

src/context.ts

@@ -14,7 +14,7 @@ import * as handlebars from 'handlebars';
 let _defaultContext, _tmpDir: string;
 
 export interface Inputs {
-  addHost: string[];
+  addHosts: string[];
   allow: string[];
   buildArgs: string[];
   builder: string;
@@ -68,7 +68,7 @@ export function tmpNameSync(options?: tmp.TmpNameOptions): string {
 
 export async function getInputs(defaultContext: string): Promise<Inputs> {
   return {
-    addHost: await getInputList('add-host'),
+    addHosts: await getInputList('add-hosts'),
     allow: await getInputList('allow'),
     buildArgs: await getInputList('build-args', true),
     builder: core.getInput('builder'),
@@ -106,9 +106,9 @@ export async function getArgs(inputs: Inputs, defaultContext: string, buildxVers
 
 async function getBuildArgs(inputs: Inputs, defaultContext: string, buildxVersion: string): Promise<Array<string>> {
   let args: Array<string> = ['build'];
-  if (inputs.addHost.length > 0) {
-    args.push('--add-host', inputs.addHost.join(','));
-  }
+  await asyncForEach(inputs.addHosts, async addHost => {
+    args.push('--add-host', addHost);
+  });
   if (inputs.allow.length > 0) {
     args.push('--allow', inputs.allow.join(','));
   }