Merge branch 'add/auto_format'

Author: rhysd

README.md

@@ -74,6 +74,11 @@ You can specify more extra options in `g:clang_format#extra_args` as String or L
 When this variable's value is `1`, vim-clang-format automatically detects the style file like
 `.clang-format` or `_clang-format` and applies the style to formatting.
 
+- `g:clang_format#auto_format`
+
+When the value is 1, a current buffer is automatically formatted on saving the buffer.
+Formatting is executed at `BufWritePre` event.
+
 ### Vimrc Example
 
 ```vim

autoload/clang_format.vim

@@ -105,6 +105,7 @@ let g:clang_format#code_style = s:getg('clang_format#code_style', 'google')
 let g:clang_format#style_options = s:getg('clang_format#style_options', {})
 
 let g:clang_format#detect_style_file = s:getg('clang_format#detect_style_file', 1)
+let g:clang_format#auto_format = s:getg('clang_format#auto_format', 0)
 " }}}
 
 " check version of clang-format "{{{

plugin/clang_format.vim

@@ -14,7 +14,7 @@ command! -range=% -nargs=0 ClangFormatEchoFormattedCode echo clang_format#format
 
 augroup plugin-clang-format-auto-format
     autocmd!
-    autocmd BufWritePre * if &ft ==# 'cpp' && get(g:, 'clang_format#auto_format', 0) | call clang_format#replace(1, line('$')) | endif
+    autocmd BufWritePre * if &ft ==# 'cpp' && g:clang_format#auto_format | call clang_format#replace(1, line('$')) | endif
 augroup END
 
 let g:loaded_clang_format = 1

t/clang_format_spec.vim

@@ -212,3 +212,30 @@ describe ':ClangFormat'
 
 end
 " }}}
+
+
+" test for auto formatting {{{
+describe 'g:clang_format#auto_format'
+
+    before
+        let g:clang_format#auto_format = 1
+        new
+        execute 'silent' 'edit!' './'.s:root_dir.'t/test.cpp'
+    end
+
+    after
+        bdelete!
+        if filereadable('./'.s:root_dir.'t/tmp.cpp')
+            call delete('./'.s:root_dir.'t/tmp.cpp')
+        endif
+    end
+
+    it 'formats a current buffer on BufWritePre if the value is 1'
+        SKIP because somehow BufWritePre event isn't fired
+        let formatted = clang_format#format(1, line('$'))
+        doautocmd BufWritePre
+        let auto_formatted = join(getline(1, line('$')), "\n")
+        Expect auto_formatted ==# formatted
+    end
+end
+" }}}