Add auto-alignment of class definition with tabular

Author: Felixoid

README.md

@@ -8,8 +8,10 @@ Provides
 
   * Formatting based on the latest Puppetlabs Style Guide
   * Syntax highlighting compatible with puppet 4.x
-  * Automatic => alignment
+  * Automatic '=>' alignment
     * If you don't like that, add `let g:puppet_align_hashes = 0` to your vimrc.
+  * Automatic '=' alignment in class definition ([tabular](https://github.com/godlygeek/tabular) is required)
+    * If you don't like that, add `let g:puppet_align_classes = 0` to your vimrc.
   * Ctags support
   * Doesn't require a bloated JRE
   * Doesn't take minutes to open
@@ -24,6 +26,7 @@ Additional useful plugins
    [snipmate](https://github.com/garbas/vim-snipmate) and
    [ultisnips](https://github.com/SirVer/ultisnips).
  * [Tagbar](https://github.com/majutsushi/tagbar) plugin for Ctags support.
+ * [Tabular](https://github.com/godlygeek/tabular) plugin for automatical align
 
 Installation
 ------------

after/plugin/puppet_tabular.vim

@@ -0,0 +1,27 @@
+if !exists('g:puppet_align_classes')
+    let g:puppet_align_classes = 1
+endif
+
+if exists(':AddTabularPipeline') && g:puppet_align_classes
+    " The unction is filtering definition by '$' symbol, then applies tabular to
+    " payload and join again. Source for this taken from
+    " https://unix.stackexchange.com/questions/35787/indent-the-middle-of-multiple-lines
+    function! AlignPuppetClass(lines)
+        " List of payload, should contain '$' AND not contain '=>'
+        let attributes = map(copy(a:lines), '(v:val =~ "[$]" && v:val !~ "=>") ? v:val : ""')
+        " List of noise, may be without '$' or with '=>'
+        let noise = map(copy(a:lines), '(v:val !~ "[$]" || v:val =~ "=>") ? v:val : ""')
+        " Splitting only by first '$attribute'
+        call tabular#TabularizeStrings(attributes, '^[^$]*\zs\s\+\$\w\+\>', 'l0l1')
+        call map(a:lines, 'remove(attributes, 0) . remove(noise, 0)')
+    endfunction
+
+    " The class definition could be interrupted with enum's multiline, selectors
+    " or whatever else, so tabular will search for any of `${['",#` symbols and
+    " pass them into AlignPuppetClass function
+    au FileType puppet AddTabularPipeline! puppet_class /[${['",#]/ AlignPuppetClass(a:lines)
+    au FileType puppet inoremap <buffer> <silent> ,<CR> ,<Esc>:Tabularize puppet_class<CR>o
+    " A comma should be at the last position in the line that's why 'norm A'
+    " is enough in this case
+    au FileType puppet inoremap <buffer> <silent> ,, ,<Esc>:Tabularize puppet_class<CR>A
+endif