Throw error message instead of exit code

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

.github/workflows/ci.yml

@@ -197,6 +197,64 @@ jobs:
         if: always()
         uses: crazy-max/ghaction-dump-context@v1
 
+  error:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2.3.3
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      -
+        name: Build
+        continue-on-error: true
+        uses: ./
+        with:
+          context: ./test
+          file: ./test/Dockerfile
+          platforms: linux/386,linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64,linux/ppc64le,linux/s390x
+          push: true
+          tags: localhost:5000/name/app:latest
+      -
+        name: Dump context
+        if: always()
+        uses: crazy-max/ghaction-dump-context@v1
+
+  docker-driver:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        push:
+          - true
+          - false
+    services:
+      registry:
+        image: registry:2
+        ports:
+          - 5000:5000
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2.3.3
+      -
+        name: Build
+        continue-on-error: ${{ matrix.push }}
+        uses: ./
+        with:
+          context: ./test
+          file: ./test/Dockerfile
+          push: ${{ matrix.push }}
+          tags: localhost:5000/name/app:latest
+      -
+        name: Dump context
+        if: always()
+        uses: crazy-max/ghaction-dump-context@v1
+
   multi:
     runs-on: ubuntu-latest
     strategy:

__tests__/context.test.ts

@@ -1,7 +1,7 @@
 import * as fs from 'fs';
 import * as path from 'path';
-import * as context from '../src/context';
 import * as buildx from '../src/buildx';
+import * as context from '../src/context';
 
 jest.spyOn(context, 'defaultContext').mockImplementation((): string => {
   return 'https://github.com/docker/build-push-action.git#test-jest';

src/exec.ts

@@ -7,7 +7,7 @@ export interface ExecResult {
   stderr: string;
 }
 
-export const exec = async (command: string, args: string[] = [], silent: boolean): Promise<ExecResult> => {
+export const exec = async (command: string, args: string[] = [], silent?: boolean): Promise<ExecResult> => {
   let stdout: string = '';
   let stderr: string = '';
 

src/main.ts

@@ -2,20 +2,18 @@ import * as fs from 'fs';
 import * as os from 'os';
 import * as buildx from './buildx';
 import * as context from './context';
+import * as exec from './exec';
 import * as stateHelper from './state-helper';
 import * as core from '@actions/core';
-import * as exec from '@actions/exec';
 
 async function run(): Promise<void> {
   try {
     if (os.platform() !== 'linux') {
-      core.setFailed('Only supported on linux platform');
-      return;
+      throw new Error(`Only supported on linux platform`);
     }
 
     if (!(await buildx.isAvailable())) {
-      core.setFailed(`Buildx is required. See https://github.com/docker/setup-buildx-action to set up buildx.`);
-      return;
+      throw new Error(`Buildx is required. See https://github.com/docker/setup-buildx-action to set up buildx.`);
     }
     stateHelper.setTmpDir(context.tmpDir());
 
@@ -27,7 +25,11 @@ async function run(): Promise<void> {
 
     core.info(`🏃 Starting build...`);
     const args: string[] = await context.getArgs(inputs, defContext, buildxVersion);
-    await exec.exec('docker', args);
+    await exec.exec('docker', args).then(res => {
+      if (res.stderr != '' && !res.success) {
+        throw new Error(`buildx call failed with: ${res.stderr.match(/(.*)\s*$/)![0]}`);
+      }
+    });
 
     const imageID = await buildx.getImageID();
     if (imageID) {