docker: configFile method

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

src/docker/docker.ts

@@ -14,17 +14,29 @@
  * limitations under the License.
  */
 
+import fs from 'fs';
 import os from 'os';
 import path from 'path';
 import * as core from '@actions/core';
 import * as io from '@actions/io';
+
 import {Exec} from '../exec';
 
+import {ConfigFile} from '../types/docker';
+
 export class Docker {
   static get configDir(): string {
     return process.env.DOCKER_CONFIG || path.join(os.homedir(), '.docker');
   }
 
+  public static configFile(): ConfigFile | undefined {
+    const f = path.join(Docker.configDir, 'config.json');
+    if (!fs.existsSync(f)) {
+      return undefined;
+    }
+    return <ConfigFile>JSON.parse(fs.readFileSync(f, {encoding: 'utf-8'}));
+  }
+
   public static async isAvailable(): Promise<boolean> {
     return await io
       .which('docker', true)

src/types/docker.ts

@@ -0,0 +1,66 @@
+/**
+ * Copyright 2023 actions-toolkit authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// https://github.com/docker/cli/blob/master/cli/config/configfile/file.go
+export interface ConfigFile {
+  auths: Record<string, AuthConfig>;
+  HttpHeaders?: Record<string, string>;
+  psFormat?: string;
+  imagesFormat?: string;
+  networksFormat?: string;
+  pluginsFormat?: string;
+  volumesFormat?: string;
+  statsFormat?: string;
+  detachKeys?: string;
+  credsStore?: string;
+  credHelpers?: Record<string, string>;
+  serviceInspectFormat?: string;
+  servicesFormat?: string;
+  tasksFormat?: string;
+  secretFormat?: string;
+  configFormat?: string;
+  nodesFormat?: string;
+  pruneFilters?: string[];
+  proxies?: Record<string, ProxyConfig>;
+  experimental?: string;
+  stackOrchestrator?: string;
+  kubernetes?: KubernetesConfig;
+  currentContext?: string;
+  cliPluginsExtraDirs?: string[];
+  plugins?: Record<string, Record<string, string>>;
+  aliases?: Record<string, string>;
+}
+
+export interface ProxyConfig {
+  httpProxy?: string;
+  httpsProxy?: string;
+  noProxy?: string;
+  ftpProxy?: string;
+}
+
+export interface KubernetesConfig {
+  allNamespaces?: string;
+}
+
+export interface AuthConfig {
+  username?: string;
+  password?: string;
+  auth?: string;
+  email?: string;
+  serveraddress?: string;
+  identitytoken?: string;
+  registrytoken?: string;
+}