npm installation feature

npm/install.js

@@ -2,6 +2,7 @@
 
 const ora = require('ora')('Initializing...').start()
 const Promise = require('bluebird')
+const exec = require('child_process').exec
 const fs = Promise.promisifyAll(require('fs-extra'))
 const https = require('follow-redirects').https
 const path = require('path')
@@ -41,23 +42,47 @@ fs.readJsonAsync('package.json').then((packageObj) => {
       })
     })
   })
+}).then(() => {
+  return new Promise((resolve, reject) => {
+    ora.text = 'Installing Wiki.js npm dependencies...'
+    let npmInstallProc = exec('npm install --only=production', {
+      cwd: installDir
+    })
+    npmInstallProc.stdout.pipe(process.stdout)
+    npmInstallProc.on('error', err => {
+      reject(err)
+    })
+    .on('exit', () => {
+      ora.text = 'Wiki.js npm dependencies installed successfully.'
+      resolve(true)
+    })
+  })
 }).then(() => {
   fs.accessAsync(path.join(installDir, 'config.yml')).then(() => {
     /**
      * Upgrade mode
      */
     ora.text = 'Upgrade succeeded. Reloading Wiki.js...'
-    return pm2.restartAsync('wiki').catch(err => { // eslint-disable-line handle-callback-err
-      return new Error('Unable to restart Wiki.js via pm2... Do a manual restart!')
-    }).then(() => {
-      ora.succeed('Wiki.js has restarted. Upgrade completed.')
+    return pm2.connectAsync().then(() => {
+      return pm2.restartAsync('wiki').catch(err => { // eslint-disable-line handle-callback-err
+        return new Error('Unable to restart Wiki.js via pm2... Do a manual restart!')
+      }).then(() => {
+        ora.succeed('Wiki.js has restarted. Upgrade completed.')
+      })
+    }).catch(err => {
+      ora.fail(err)
+    }).finally(() => {
+      pm2.disconnect()
     })
   }).catch(err => {
     /**
      * Install mode
      */
     if (err.code === 'ENOENT') {
-      ora.succeed('Installation succeeded. You can now continue with the configuration steps. Check out https://docs.wiki.requarks.io/install for more info.')
+      ora.text = 'First-time install, creating a new config.yml...'
+      return fs.copyAsync(path.join(installDir, 'config.sample.yml'), path.join(installDir, 'config.yml')).then(() => {
+        ora.succeed('Installation succeeded. You can now continue with the configuration steps. Check out https://docs.wiki.requarks.io/install for more info.')
+      })
     } else {
       return err
     }