[nvim] remove airline-themes and use a custom theme instead

nvim/autoload/airline/themes/dotfiles.vim

@@ -0,0 +1,43 @@
+let s:palette = {}
+
+let s:colors = g:dotfiles_colorscheme_base16_colors
+function! s:base16_color(fg, bg)
+  let l:fg = s:colors[a:fg]
+  let l:bg = s:colors[a:bg]
+  return [l:fg.gui, l:bg.gui, l:fg.cterm, l:bg.cterm]
+endfunction
+
+let s:section_a = s:base16_color(0x1, 0xB)
+let s:section_b = s:base16_color(0x6, 0x2)
+let s:section_c = s:base16_color(0x9, 0x1)
+let s:palette.normal = airline#themes#generate_color_map(
+\ s:section_a,
+\ s:section_b,
+\ s:section_c)
+
+let s:section_a_overrides = {
+\ 'insert' : s:base16_color(0x1, 0xD),
+\ 'replace': s:base16_color(0x1, 0x8),
+\ 'visual' : s:base16_color(0x1, 0xE),
+\ }
+for [s:mode, s:color] in items(s:section_a_overrides)
+  let s:palette[s:mode] = { 'airline_a': s:color, 'airline_z': s:color }
+endfor
+
+let s:section_inactive = s:base16_color(0x5, 0x1)
+let s:palette.inactive = airline#themes#generate_color_map(
+\ s:section_inactive,
+\ s:section_inactive,
+\ s:section_inactive)
+
+if get(g:, 'loaded_ctrlp', 0)
+  let s:ctrlp_dark  = s:base16_color(0x7, 0x2)
+  let s:ctrlp_light = s:base16_color(0x7, 0x4)
+  let s:ctrlp_white = s:base16_color(0x5, 0x1) + ['bold']
+  let s:palette.ctrlp = airline#extensions#ctrlp#generate_color_map(
+  \ s:ctrlp_dark,
+  \ s:ctrlp_light,
+  \ s:ctrlp_white)
+endif
+
+let airline#themes#dotfiles#palette = s:palette

nvim/lib/interface.vim

@@ -94,6 +94,8 @@ endif
 
 " Airline (statusline) {{{
 
+  let g:airline_theme = 'dotfiles'
+
   let g:airline_symbols = {
     \ 'readonly': 'RO',
     \ 'whitespace': "\u21e5 ",

nvim/lib/plugins.vim

@@ -46,7 +46,6 @@ Plug 'junegunn/vim-plug'
   Plug 'moll/vim-bbye'
   Plug 'gerw/vim-HiLinkTrace'
   Plug 'vim-airline/vim-airline'
-  Plug 'vim-airline/vim-airline-themes'
   Plug 'tpope/vim-obsession'
   Plug 'romainl/vim-qf'
   if g:vim_ide