feat: show docker version

Show the version of Docker CLI same as way as for Podman CLI.

In the future, they might be able to show the server version.

Signed-off-by: Anders F Björklund <anders.f.bjorklund@gmail.com>

extensions/docker/src/docker-cli.ts

@@ -0,0 +1,61 @@
+/**********************************************************************
+ * Copyright (C) 2024 Red Hat, Inc.
+ *
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ ***********************************************************************/
+import * as extensionApi from '@podman-desktop/api';
+
+const macosExtraPath = '/usr/local/bin:/opt/homebrew/bin:/opt/local/bin';
+
+export function getInstallationPath(): string {
+  const env = process.env;
+  if (extensionApi.env.isMac) {
+    if (!env.PATH) {
+      return macosExtraPath;
+    } else {
+      return env.PATH.concat(':').concat(macosExtraPath);
+    }
+  } else {
+    return env.PATH;
+  }
+}
+
+export function getDockerCli(): string {
+  if (extensionApi.env.isWindows) {
+    return 'docker.exe';
+  }
+  return 'docker';
+}
+
+export interface InstalledDocker {
+  version: string;
+}
+
+export async function getDockerInstallation(): Promise<InstalledDocker | undefined> {
+  try {
+    let { stdout: versionOut } = await extensionApi.process.exec(getDockerCli(), ['--version']);
+    if (!versionOut.startsWith('Docker')) {
+      // could be the podman-docker wrapper script
+      return undefined;
+    }
+    versionOut = versionOut.replace(/, build .*$/, '');
+    const versionArr = versionOut.split(' ');
+    const version = versionArr[versionArr.length - 1];
+    return { version };
+  } catch (err) {
+    // no docker binary
+    return undefined;
+  }
+}

extensions/docker/src/extension.ts

@@ -22,6 +22,7 @@ import * as http from 'node:http';
 
 let stopLoop = false;
 
+import { getDockerInstallation } from './docker-cli';
 let socketPath: string;
 let provider: extensionApi.Provider;
 let providerState: extensionApi.ProviderConnectionStatus = 'stopped';
@@ -108,6 +109,21 @@ async function monitorDaemon(extensionContext: extensionApi.ExtensionContext): P
 }
 
 async function updateProvider(extensionContext: extensionApi.ExtensionContext) {
+  try {
+    const installedDocker = await getDockerInstallation();
+    if (!installedDocker) {
+      provider.updateStatus('not-installed');
+    } else if (installedDocker.version) {
+      provider.updateVersion(installedDocker.version);
+      // update provider status if someone has installed docker externally
+      if (provider.status === 'not-installed') {
+        provider.updateStatus('installed');
+      }
+    }
+  } catch (error) {
+    // ignore the update
+  }
+
   // check if the daemon is alive
   const isAlive = await isDockerDaemonAlive(socketPath);