feat: add listTarget api

lib/Api.js

@@ -277,6 +277,12 @@ class Api {
         });
     }
 
+    listTargets (options) {
+        return require('./check_reqs').check_android().then(() => {
+            return require('./run').runListDevices.call(this, options);
+        });
+    }
+
     /**
      * Cleans out the build artifacts from platform's directory, and also
      * cleans out the platform www directory if called without options specified.

lib/run.js

@@ -83,3 +83,49 @@ module.exports.run = async function (runOptions = {}) {
 
     return target.install(resolvedTarget, { manifest, buildResults, cordovaGradleConfigParser });
 };
+
+async function listDevices () {
+    events.emit('log', `\nAvailable ${this.platform} devices:`);
+
+    const { list } = require('./target');
+
+    await list().then(targets => {
+        const deviceIds = targets
+            .filter(({ type }) => type === 'device')
+            .map(({ id }) => id);
+
+        console.log(deviceIds.join('\n'));
+    }, function (err) {
+        console.error('ERROR: ' + err);
+        process.exit(2);
+    });
+}
+
+async function listEmulators () {
+    events.emit('log', `\nAvailable ${this.platform} virtual devices:`);
+    const emulators = require('./emulator');
+
+    await emulators.list_images().then(function (emulator_list) {
+        emulator_list && emulator_list.forEach(function (emu) {
+            console.log(emu.name);
+        });
+    }, function (err) {
+        console.error('ERROR: ' + err);
+        process.exit(2);
+    });
+}
+
+module.exports.runListDevices = async function (options) {
+    const { options: cliArgs } = options;
+
+    if (cliArgs.device) {
+        await listDevices.call(this);
+    } else if (cliArgs.emulator) {
+        await listEmulators.call(this);
+    } else {
+        await listDevices.call(this);
+        await listEmulators.call(this);
+    }
+
+    return true;
+};