vimrc: ALE, unimpaired and colors

.vimrc

@@ -30,6 +30,8 @@ if filereadable(expand(vundle_dir) . "/README.md")
     if empty($VIM_DISABLE_YCM)
         Plugin 'ycm-core/YouCompleteMe'
     endif
+    Plugin 'dense-analysis/ale'
+    Plugin 'tpope/vim-unimpaired'
 
     call vundle#end()            " required
 else
@@ -201,6 +203,19 @@ let g:ycm_python_interpreter_path = '~/.python-venv.kuba/bin/python'
 "let g:ycm_autoclose_preview_window_after_insertion = 1 " Close after leaving insert mode
 let g:ycm_autoclose_preview_window_after_completion = 1 " Close after accepting completion
 
+" ALE
+let g:ale_linters = {
+            \   'python': ['flake8'],
+            \   'c':      ['gcc']
+            \}
+let g:ale_set_highlights = 1
+let g:ale_sign_error = '>>'
+let g:ale_sign_warning = '--'
+let g:ale_lint_on_text_changed = 'never'
+let g:ale_lint_on_enter = 0
+let g:ale_c_parse_makefile = 1
+let g:ale_lint_on_insert_leave = 1
+
 " fugitive.vim looks for tags in .git
 " set tags +=~/tags " Recursively move upwards in tree, searching in subfolders for tags file
 
@@ -222,6 +237,11 @@ set statusline+=\ %l:%c"
 set statusline+=%#MoreMsg#
 set statusline+=\ "
 
+" Colors
+highlight SignColumn      ctermbg=NONE
+highlight GitGutterAdd    ctermbg=NONE ctermfg=2
+highlight GitGutterChange ctermbg=NONE ctermfg=3
+highlight GitGutterDelete ctermbg=NONE ctermfg=1
 
 " flake8
 let g:flake8_show_in_gutter=1