Add support for LESS CSS

Author: tpope

autoload/rails.vim

@@ -707,7 +707,7 @@ function! s:readable_calculate_file_type() dict abort
     let r = "task"
   elseif f =~ '\<log/.*\.log$'
     let r = "log"
-  elseif e == "css" || e == "sass"
+  elseif e == "css" || e == "sass" || e == "less"
     let r = "stylesheet-".e
   elseif e == "js"
     let r = "javascript"
@@ -762,7 +762,8 @@ function! s:app_has(feature) dict
         \'test': 'test/',
         \'spec': 'spec/',
         \'cucumber': 'features/',
-        \'sass': 'public/stylesheets/sass/'}
+        \'sass': 'public/stylesheets/sass/',
+        \'lesscss': 'app/stylesheets/'}
   if self.cache.needs('features')
     call self.cache.set('features',{})
   endif
@@ -1346,6 +1347,8 @@ function! s:readable_preview_urls(lnum) dict abort
     let urls = urls + [s:sub(s:sub(self.name(),'^public/stylesheets/sass/','/stylesheets/'),'\.sass$','.css')]
   elseif self.name() =~ '^public/'
     let urls = urls + [s:sub(self.name(),'^public','')]
+  elseif self.name() =~ '^app/stylesheets/'
+    let urls = urls + [s:sub(s:sub(self.name(),'^app/stylesheets/','/stylesheets/'),'\.less$','.css')]
   elseif self.controller_name() != '' && self.controller_name() != 'application'
     if self.type_name('controller') && self.last_method(a:lnum) != ''
       let urls += ['/'.self.controller_name().'/'.self.last_method(a:lnum).'/']
@@ -2613,6 +2616,8 @@ function! s:stylesheetEdit(cmd,...)
   let name = a:0 ? a:1 : s:controller(1)
   if rails#app().has('sass') && rails#app().has_file('public/stylesheets/sass/'.name.'.sass')
     return s:EditSimpleRb(a:cmd,"stylesheet",name,"public/stylesheets/sass/",".sass",1)
+  elseif rails#app().has('lesscss') && rails#app().has_file('app/stylesheets/'.name.'.less')
+    return s:EditSimpleRb(a:cmd,"stylesheet",name,"app/stylesheets/",".less",1)
   else
     return s:EditSimpleRb(a:cmd,"stylesheet",name,"public/stylesheets/",".css",1)
   endif
@@ -4469,6 +4474,8 @@ function! RailsBufInit(path)
     setlocal filetype=haml
   elseif &ft =~ '^\%(sass\|conf\)\=$' && expand("%:e") == "sass"
     setlocal filetype=sass
+  elseif &ft =~ '^\%(lesscss\|conf\)\=$' && expand("%:e") == "less"
+    setlocal filetype=lesscss
   elseif &ft =~ '^\%(dryml\)\=$' && expand("%:e") == "dryml"
     setlocal filetype=dryml
   elseif (&ft == "" || v:version < 701) && expand("%:e") =~ '^\%(rhtml\|erb\)$'
@@ -4573,7 +4580,7 @@ function! s:BufSettings()
   call self.setvar('&includeexpr','RailsIncludeexpr()')
   call self.setvar('&suffixesadd', ".rb,.".s:gsub(s:view_types,',',',.').",.css,.js,.yml,.csv,.rake,.sql,.html,.xml")
   let ft = self.getvar('&filetype')
-  if ft =~ '^\%(e\=ruby\|[yh]aml\|javascript\|css\|sass\)$'
+  if ft =~ '^\%(e\=ruby\|[yh]aml\|javascript\|css\|sass\|lesscss\)$'
     call self.setvar('&shiftwidth',2)
     call self.setvar('&softtabstop',2)
     call self.setvar('&expandtab',1)