Refactor Docker config

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

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
         name: Checkout
         uses: actions/checkout@v2.3.1
       -
-        name: Build
+        name: Build and push
         uses: ./
         with:
           context: ./test
@@ -68,7 +68,7 @@ jobs:
           context: ./test
           file: ./test/Dockerfile-${{ matrix.dockerfile }}
           builder: ${{ steps.buildx.outputs.builder }}
-          platforms: linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64,linux/386,linux/ppc64le,linux/s390x
+          platforms: linux/amd64,linux/arm64,linux/386
           #push: true
           tags: |
             localhost:5000/name/app:latest

src/buildx.ts

@@ -1,17 +1,6 @@
-import fs from 'fs';
-import path from 'path';
-import os from 'os';
+import * as docker from './docker';
 import * as exec from './exec';
 
-interface DockerConfig {
-  credsStore?: string;
-  experimental?: string;
-  stackOrchestrator?: string;
-  aliases?: {
-    builder?: string;
-  };
-}
-
 export async function isAvailable(): Promise<Boolean> {
   return await exec.exec(`docker`, ['buildx'], true).then(res => {
     if (res.stderr != '' && !res.success) {
@@ -22,15 +11,8 @@ export async function isAvailable(): Promise<Boolean> {
 }
 
 export async function isInstalled(): Promise<Boolean> {
-  const dockerHome: string = process.env.DOCKER_CONFIG || path.join(os.homedir(), '.docker');
-
-  const dockerCfgFile: string = path.join(dockerHome, 'config.json');
-  if (!fs.existsSync(dockerCfgFile)) {
-    return false;
-  }
-
-  const dockerCfg: DockerConfig = JSON.parse(fs.readFileSync(dockerCfgFile, {encoding: 'utf-8'}));
-  return dockerCfg.aliases?.builder == 'buildx';
+  const dockerCfg = await docker.config();
+  return dockerCfg?.aliases?.builder == 'buildx';
 }
 
 export async function use(builder: string): Promise<void> {

src/docker.ts

@@ -1,10 +1,34 @@
+import path from 'path';
+import os from 'os';
+import fs from 'fs';
+
+export interface Config {
+  credsStore?: string;
+  experimental?: string;
+  stackOrchestrator?: string;
+  aliases?: {
+    builder?: string;
+  };
+}
+
 export interface Image {
   registry?: string;
   namespace?: string;
   repository: string;
   tag?: string;
 }
 
+export async function config(): Promise<Config | undefined> {
+  const dockerHome: string = process.env.DOCKER_CONFIG || path.join(os.homedir(), '.docker');
+
+  const file: string = path.join(dockerHome, 'config.json');
+  if (!fs.existsSync(file)) {
+    return;
+  }
+
+  return JSON.parse(fs.readFileSync(file, {encoding: 'utf-8'})) as Config;
+}
+
 export const parseImage = async (image: string): Promise<Image | undefined> => {
   const match = image.match(/^(?:([^\/]+)\/)?(?:([^\/]+)\/)?([^@:\/]+)(?:[@:](.+))?$/);
   if (!match) {