Close #2 init composer.json open command

Author: Gianluca Arbezzano

README.md

@@ -11,6 +11,10 @@ To run command for example `:ComposerRun validate` run command validate for your
 ```
 This command exec the installation flow of composer's install. This process require `curl`
 
+```vim
+:ComposerJSON
+```
+This command open `composer.json`
 
 ## Install
 ```vim

plugin/vim-composer.vim

@@ -23,6 +23,7 @@ endif
 
 command! -narg=* ComposerRun call s:ComposerRunFunc(<q-args>)
 command! ComposerGet call s:ComposerGetFunc()
+command! ComposerJSON call s:OpenComposerJSON()
 
 function! s:ComposerRunFunc(arg)
     let s:arg = a:arg
@@ -32,3 +33,11 @@ endfunction
 function! s:ComposerGetFunc()
     exe "! curl -Ss https://getcomposer.org/installer | php"
 endfunction
+
+function! s:OpenComposerJSON()
+    if filereadable("./composer.json")
+        exe "vsplit ./composer.json"
+    else
+        echo "Composer json doesn't exist"
+    endif
+endfunction