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node_modules/node-simctl/lib/subcommands/boot.js

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+import _ from 'lodash';
+import log, { LOG_PREFIX } from '../logger';
+
+
+const commands = {};
+
+/**
+ * Boot the particular Simulator if it is not running.
+ *
+ * @throws {Error} If the corresponding simctl subcommand command
+ *                 returns non-zero return code.
+ * @throws {Error} If the `udid` instance property is unset
+ */
+commands.bootDevice = async function bootDevice () {
+  try {
+    await this.exec('boot', {
+      args: [this.requireUdid('boot')]
+    });
+  } catch (e) {
+    if (_.includes(e.message, 'Unable to boot device in current state: Booted')) {
+      throw e;
+    }
+    log.debug(LOG_PREFIX, `Simulator already in 'Booted' state. Continuing`);
+  }
+};
+
+export default commands;