Merge pull request #7 from react-native-training/feature/install-packages

Install Packages using npm or yarn

Author: dabit3

bin/build.js

@@ -5,6 +5,42 @@ const paths = require('path');
 const fs = require('fs');
 const figlet = require('figlet');
 const chalk = require('chalk');
+const execSync = require('child_process').execSync;
+const spawn = require('cross-spawn');
+
+function shouldUseYarn() {
+  try {
+    execSync('yarnpkg --version', { stdio: 'ignore' });
+    return true;
+  } catch (e) {
+    return false;
+  }
+}
+
+const installPackages = () => {
+  console.log(chalk.white.bold('Installing Packages'));
+  return new Promise((resolve, reject) => {
+    let command;
+    let args = ['install'];
+
+    if (shouldUseYarn()) {
+      command = 'yarn';
+    } else {
+      command = 'npm';
+    }
+
+    const child = spawn(command, args, { stdio: 'inherit' });
+    child.on('close', code => {
+      if (code !== 0) {
+        reject({
+          command: `${command} ${args.join(' ')}`
+        });
+        return;
+      }
+      resolve();
+    })
+  })
+}
 
 const build = (appName) => {
   cp('-r', __dirname + '/../node_modules/rxapp/.', appName);
@@ -19,21 +55,27 @@ const build = (appName) => {
     console.log('----------------------------------------------------------');
     console.log(chalk.green.bold('Welcome to ReactXP'));
     console.log('----------------------------------------------------------');
-    console.log(chalk.white.bold('Let\'s get started'));
-    console.log(chalk.green('Step 1: cd into the newly created ' + appName + ' directory'));
-    console.log(chalk.green('Step 2: install dependencies using yarn or npm'));
-    console.log('----------------------------------------------------------');
-    console.log(chalk.white.bold('For Web'));
-    console.log(chalk.green('Step 1. npm run web-watch'));
-    console.log(chalk.black.bold('This compiles the TypeScript code and recompiles it whenever any files are changed.'))
-    console.log(chalk.green('Step 2. Open index.html in your browser to view the result.'));
-    console.log('----------------------------------------------------------');
-    console.log(chalk.white.bold('For React Native'));
-    console.log(chalk.green('Step 1. run npm run rn-watch'));
-    console.log(chalk.black.bold('This compiles the TypeScript code and recompiles it whenever any files are changed.'));
-    console.log(chalk.green('Step 2. run npm start'));
-    console.log(chalk.black.bold('This starts the React Native Packager.'));
-    console.log('----------------------------------------------------------');
+    cd(appName);
+    installPackages().then(() => {
+      console.log(chalk.white.bold('Let\'s get started'));
+      console.log(chalk.green('Step 1: cd into the newly created ' + appName + ' directory'));
+      console.log('----------------------------------------------------------');
+      console.log(chalk.white.bold('For Web'));
+      console.log(chalk.green('Step 1. npm run web-watch'));
+      console.log(chalk.black.bold('This compiles the TypeScript code and recompiles it whenever any files are changed.'))
+      console.log(chalk.green('Step 2. Open index.html in your browser to view the result.'));
+      console.log('----------------------------------------------------------');
+      console.log(chalk.white.bold('For React Native'));
+      console.log(chalk.green('Step 1. run npm run rn-watch'));
+      console.log(chalk.black.bold('This compiles the TypeScript code and recompiles it whenever any files are changed.'));
+      console.log(chalk.green('Step 2. run npm start'));
+      console.log(chalk.black.bold('This starts the React Native Packager.'));
+      console.log('----------------------------------------------------------');
+    })
+    .catch(error => {
+      console.log(chalk.red('An unexpected error occurred'))
+      console.log(chalk.red(error));
+    });
   });
 }
 

package.json

@@ -20,6 +20,7 @@
   },
   "devDependencies": {
     "chalk": "^1.1.3",
-    "commander": "^2.9.0"
+    "commander": "^2.9.0",
+    "cross-spawn": "^5.1.0"
   }
 }

yarn.lock

@@ -1178,6 +1178,14 @@ cross-spawn@^3.0.1:
     lru-cache "^4.0.1"
     which "^1.2.9"
 
+cross-spawn@^5.1.0:
+  version "5.1.0"
+  resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-5.1.0.tgz#e8bd0efee58fcff6f8f94510a0a554bbfa235449"
+  dependencies:
+    lru-cache "^4.0.1"
+    shebang-command "^1.2.0"
+    which "^1.2.9"
+
 [email protected]:
   version "2.0.5"
   resolved "https://registry.yarnpkg.com/cryptiles/-/cryptiles-2.0.5.tgz#3bdfecdc608147c1c67202fa291e7dca59eaa3b8"
@@ -3725,6 +3733,16 @@ setimmediate@^1.0.5:
   version "1.0.5"
   resolved "https://registry.yarnpkg.com/setimmediate/-/setimmediate-1.0.5.tgz#290cbb232e306942d7d7ea9b83732ab7856f8285"
 
+shebang-command@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/shebang-command/-/shebang-command-1.2.0.tgz#44aac65b695b03398968c39f363fee5deafdf1ea"
+  dependencies:
+    shebang-regex "^1.0.0"
+
+shebang-regex@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/shebang-regex/-/shebang-regex-1.0.0.tgz#da42f49740c0b42db2ca9728571cb190c98efea3"
+
 [email protected]:
   version "1.6.1"
   resolved "https://registry.yarnpkg.com/shell-quote/-/shell-quote-1.6.1.tgz#f4781949cce402697127430ea3b3c5476f481767"