add deprecation messages for flake8 settings

diff --git a/autoload/flake8.vim b/autoload/flake8.vim
index b7200e6b883e1d4b109c24fdefba7a928be0f62e..a958ec5d73acf9fd7c4a3d324898a0ad81e432e3 100644 (file)
--- a/autoload/flake8.vim
+++ b/autoload/flake8.vim
@@ -12,16 +12,41 @@ set cpo&vim
 
 function! flake8#Flake8()
     call s:Flake8()
+    call s:Warnings()
 endfunction
 
 function! flake8#Flake8UnplaceMarkers()
     call s:UnplaceMarkers()
+    call s:Warnings()
 endfunction
 
 "" }}}
 
 "" ** internal ** {{{
 
+"" warnings 
+
+let s:displayed_warnings = 0
+function s:Warnings()
+  if !s:displayed_warnings
+    let l:show_website_url = 0
+
+    let l:msg = "has been depreciated in favour of flake8 config files"
+    for setting_name in ['g:flake8_ignore', 'g:flake8_builtins', 'g:flake8_max_line_length', 'g:flake8_max_complexity']
+      if exists(setting_name)
+        echohl WarningMsg | echom setting_name l:msg | echohl None
+        let l:show_website_url = 1
+      endif
+    endfor
+
+    if l:show_website_url
+      let l:url = "http://flake8.readthedocs.org/en/latest/config.html"
+      echohl WarningMsg | echom l:url | echohl None
+    endif
+    let s:displayed_warnings = 1
+  endif
+endfunction
+
 "" config
 
 function! s:DeclareOption(name, globalPrefix, default)  " {{{