From 37219602dee2afae4bf396fbfa404154c7d1fa21 Mon Sep 17 00:00:00 2001
From: Aaron Lampros <alampros@gmail.com>
Date: Fri, 15 Apr 2016 14:00:30 -0400
Subject: [PATCH] Use H for host option short flag.

Fixes subcommand help display (`-h`).
Add program help text to show subcommand help.
---
 lib/bin/cli.js | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/lib/bin/cli.js b/lib/bin/cli.js
index 434f7825513d0..005e795c8aae0 100644
--- a/lib/bin/cli.js
+++ b/lib/bin/cli.js
@@ -22,7 +22,7 @@ program
 
 program.command('develop')
   .description('Start development server. Watches files and rebuilds and hot reloads if something changes') // eslint-disable-line max-len
-  .option('-h, --host <url>',
+  .option('-H, --host <url>',
           `Set host. Defaults to ${defaultHost}`,
           defaultHost
          )
@@ -56,7 +56,7 @@ program.command('build')
 
 program.command('serve-build')
   .description('Serve built site.')
-  .option('-h, --host <url>',
+  .option('-H, --host <url>',
           `Set host. Defaults to ${defaultHost}`,
           defaultHost
          )
@@ -78,6 +78,12 @@ program
     newCommand(rootPath, starter)
   })
 
+program.on('--help', () => {
+  console.log(`To show subcommand help:
+
+    gatsby [command] -h
+`)
+})
 
 // If the user types an unknown sub-command, just display the help.
 const subCmd = process.argv.slice(2, 3)[0]