undock: check for availability

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

src/toolkit.ts

@@ -20,6 +20,7 @@ import {Bake as BuildxBake} from './buildx/bake';
 import {Install as BuildxInstall} from './buildx/install';
 import {Builder} from './buildx/builder';
 import {BuildKit} from './buildkit/buildkit';
+import {Undock} from './undock/undock';
 import {GitHub} from './github';
 
 export interface ToolkitOpts {
@@ -38,6 +39,7 @@ export class Toolkit {
   public buildxInstall: BuildxInstall;
   public builder: Builder;
   public buildkit: BuildKit;
+  public undock: Undock;
 
   constructor(opts: ToolkitOpts = {}) {
     this.github = new GitHub({token: opts.githubToken});
@@ -47,5 +49,6 @@ export class Toolkit {
     this.buildxInstall = new BuildxInstall();
     this.builder = new Builder({buildx: this.buildx});
     this.buildkit = new BuildKit({buildx: this.buildx});
+    this.undock = new Undock();
   }
 }

src/undock/undock.ts

@@ -0,0 +1,97 @@
+/**
+ * Copyright 2024 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.
+ */
+
+import os from 'os';
+import path from 'path';
+import * as core from '@actions/core';
+import * as semver from 'semver';
+
+import {Exec} from '../exec';
+
+export interface UndockOpts {
+  binPath?: string;
+}
+
+export class Undock {
+  private readonly binPath: string;
+  private _version: string;
+  private _versionOnce: boolean;
+
+  constructor(opts?: UndockOpts) {
+    this.binPath = opts?.binPath || 'undock';
+    this._version = '';
+    this._versionOnce = false;
+  }
+
+  static get cacheDir(): string {
+    return process.env.UNDOCK_CACHE_DIR || path.join(os.homedir(), '.local', 'share', 'undock', 'cache');
+  }
+
+  public async isAvailable(): Promise<boolean> {
+    const ok: boolean = await Exec.getExecOutput(this.binPath, [], {
+      ignoreReturnCode: true,
+      silent: true
+    })
+      .then(res => {
+        if (res.stderr.length > 0 && res.exitCode != 0) {
+          core.debug(`Undock.isAvailable cmd err: ${res.stderr.trim()}`);
+          return false;
+        }
+        return res.exitCode == 0;
+      })
+      .catch(error => {
+        core.debug(`Undock.isAvailable error: ${error}`);
+        return false;
+      });
+
+    core.debug(`Undock.isAvailable: ${ok}`);
+    return ok;
+  }
+
+  public async version(): Promise<string> {
+    if (this._versionOnce) {
+      return this._version;
+    }
+    this._versionOnce = true;
+    this._version = await Exec.getExecOutput(this.binPath, ['--version'], {
+      ignoreReturnCode: true,
+      silent: true
+    }).then(res => {
+      if (res.stderr.length > 0 && res.exitCode != 0) {
+        throw new Error(res.stderr.trim());
+      }
+      return res.stdout.trim();
+    });
+    return this._version;
+  }
+
+  public async printVersion() {
+    await Exec.exec(this.binPath, ['--version'], {
+      failOnStdErr: false
+    });
+  }
+
+  public async versionSatisfies(range: string, version?: string): Promise<boolean> {
+    const ver = version ?? (await this.version());
+    if (!ver) {
+      core.debug(`Undock.versionSatisfies false: undefined version`);
+      return false;
+    }
+    const res = semver.satisfies(ver, range) || /^[0-9a-f]{7}$/.exec(ver) !== null;
+    core.debug(`Undock.versionSatisfies ${ver} statisfies ${range}: ${res}`);
+    return res;
+  }
+}