fix(android): catch api issues for --list

This commit catches errors related to unsuitable API installations.
Without system images, AVDs cannot be listed as valid targets.

fixes #23

Author: imhoffd

src/android/list.ts

@@ -1,8 +1,7 @@
-import { Target, list } from '../utils/list';
+import { list } from '../utils/list';
 
-import { Device, getDevices } from './utils/adb';
-import { AVD, getDefaultAVD, getInstalledAVDs } from './utils/avd';
-import { SDK, getSDK } from './utils/sdk';
+import { getDeviceTargets, getVirtualTargets } from './utils/list';
+import { getSDK } from './utils/sdk';
 
 export async function run(args: string[]) {
   const sdk = await getSDK();
@@ -13,44 +12,3 @@ export async function run(args: string[]) {
 
   return list(args, devices, virtualDevices);
 }
-
-export async function getDeviceTargets(sdk: SDK) {
-  return (await getDevices(sdk))
-    .filter(device => device.type === 'hardware')
-    .map(deviceToTarget);
-}
-
-export async function getVirtualTargets(sdk: SDK) {
-  const avds = await getInstalledAVDs(sdk);
-  const defaultAvd = await getDefaultAVD(sdk, avds);
-
-  if (!avds.includes(defaultAvd)) {
-    avds.push(defaultAvd);
-  }
-
-  return avds.map(avdToTarget);
-}
-
-function deviceToTarget(device: Device): Target {
-  return {
-    platform: 'android',
-    model: `${device.manufacturer} ${device.model}`,
-    sdkVersion: device.sdkVersion,
-    id: device.serial,
-    format() {
-      return `${this.model} (API ${this.sdkVersion}) ${this.id}`;
-    },
-  };
-}
-
-function avdToTarget(avd: AVD): Target {
-  return {
-    platform: 'android',
-    name: avd.name,
-    sdkVersion: avd.sdkVersion,
-    id: avd.id,
-    format() {
-      return `${this.name} (API ${this.sdkVersion}) ${this.id}`;
-    },
-  };
-}

src/android/utils/list.ts

@@ -0,0 +1,66 @@
+import * as Debug from 'debug';
+
+import { Target } from '../../utils/list';
+
+import { Device, getDevices } from './adb';
+import { AVD, getDefaultAVD, getInstalledAVDs } from './avd';
+import { SDK } from './sdk';
+
+const modulePrefix = 'native-run:android:utils:list';
+
+export async function getDeviceTargets(sdk: SDK): Promise<Target[]> {
+  const debug = Debug(`${modulePrefix}:${getDeviceTargets.name}`);
+
+  try {
+    return (await getDevices(sdk))
+      .filter(device => device.type === 'hardware')
+      .map(deviceToTarget);
+  } catch (e) {
+    debug('Error getting device targets: %O', e);
+  }
+
+  return [];
+}
+
+export async function getVirtualTargets(sdk: SDK): Promise<Target[]> {
+  const debug = Debug(`${modulePrefix}:${getVirtualTargets.name}`);
+
+  try {
+    const avds = await getInstalledAVDs(sdk);
+    const defaultAvd = await getDefaultAVD(sdk, avds);
+
+    if (!avds.includes(defaultAvd)) {
+      avds.push(defaultAvd);
+    }
+
+    return avds.map(avdToTarget);
+  } catch (e) {
+    debug('Error getting virtual targets: %O', e);
+  }
+
+  return [];
+}
+
+export function deviceToTarget(device: Device): Target {
+  return {
+    platform: 'android',
+    model: `${device.manufacturer} ${device.model}`,
+    sdkVersion: device.sdkVersion,
+    id: device.serial,
+    format() {
+      return `${this.model} (API ${this.sdkVersion}) ${this.id}`;
+    },
+  };
+}
+
+export function avdToTarget(avd: AVD): Target {
+  return {
+    platform: 'android',
+    name: avd.name,
+    sdkVersion: avd.sdkVersion,
+    id: avd.id,
+    format() {
+      return `${this.name} (API ${this.sdkVersion}) ${this.id}`;
+    },
+  };
+}