make gh-url executable

README.md

@@ -115,6 +115,14 @@ Script: [empty-trash](empty-trash)
 empty-trash
 ```
 
+### 🏹 Create custom short link for a GitHub URL using git.io
+
+Script: [gh-url](gh-url)
+
+```sh
+gh-url <url-to-shorten> <short-code>
+```
+
 ### 🤐 ZIP without .DS_Store on a Mac
 
 Script: [maczip](maczip)
@@ -130,13 +138,3 @@ Script: [delete-ss](delete-ss)
 ```sh
 delete-ss
 ```
-
-### 🏹 Custom short GitHub URL
-
-Script: [gh-url](gh-url)
-
-```sh
-gh-url <url-to-shorten> <custom-code>
-```
-
-*It will shorten your GitHub URLs to https://git.io/{custom-code}.*

gh-url

@@ -1,5 +1,6 @@
 #!/bin/bash
-curl -i https://git.io -F "url=$1" -F "code=$2"
+curl -s -i https://git.io -F "url=$1" -F "code=$2" | grep -Fi Location
 
+# will not return any output if short code is already taken
 # https://github.com/aashutoshrathi/awesome-bashrc/issues/15
 # https://blog.github.com/2011-11-10-git-io-github-url-shortener/