Colorscheme plugins as opt plugins

core/plugins.vim

@@ -373,8 +373,7 @@ endif
 """""""""""""""""""""""""""vim-airline setting""""""""""""""""""""""""""""""
 " Set airline theme to a random one if it exists
 let s:candidate_airlinetheme = ['ayu_mirage', 'lucius', 'ayu_dark', 'base16_bright',
-      \ 'base16_adwaita', 'raven', 'term', 'gruvbox_material', 'deus', 'edge', 'onedark',
-      \ 'sonokai']
+      \ 'base16_adwaita', 'raven', 'term', 'deus', 'onedark']
 let s:idx = utils#RandInt(0, len(s:candidate_airlinetheme)-1)
 let s:theme = s:candidate_airlinetheme[s:idx]
 let g:airline_theme=s:theme

core/ui.vim

@@ -3,6 +3,8 @@
 let s:my_theme_dict = {}
 
 function! s:my_theme_dict.gruvbox8() dict abort
+  packadd! vim-gruvbox8
+
   " Italic options should be put before colorscheme setting,
   " see https://github.com/morhetz/gruvbox/wiki/Terminal-specific#1-italics-is-disabled
   let g:gruvbox_italics=1
@@ -13,42 +15,57 @@ function! s:my_theme_dict.gruvbox8() dict abort
 endfunction
 
 function! s:my_theme_dict.deus() dict abort
+  packadd! vim-deus
+
   colorscheme deus
 endfunction
 
 function! s:my_theme_dict.solarized8() dict abort
+  packadd! vim-solarized8
   let g:solarized_term_italics=1
   let g:solarized_visibility='high'
   colorscheme solarized8_high
 endfunction
 
 function! s:my_theme_dict.onedark() dict abort
+  packadd! onedark.nvim
+
   colorscheme onedark
 endfunction
 
 function! s:my_theme_dict.edge() dict abort
+  packadd! edge
+
   let g:edge_enable_italic = 1
   let g:edge_better_performance = 1
   colorscheme edge
 endfunction
 
 function! s:my_theme_dict.sonokai() dict abort
+  packadd! sonokai
+
   let g:sonokai_enable_italic = 1
   let g:sonokai_better_performance = 1
   colorscheme sonokai
 endfunction
 
 function! s:my_theme_dict.gruvbox_material() dict abort
+  packadd! gruvbox-material
+
   let g:gruvbox_material_enable_italic = 1
   let g:gruvbox_material_better_performance = 1
   colorscheme gruvbox-material
 endfunction
 
 function! s:my_theme_dict.nord() dict abort
+  packadd! nord.nvim
+
   colorscheme nord
 endfunction
 
 function! s:my_theme_dict.doom_one() dict abort
+  packadd! doom-one.nvim
+
   let g:doom_one_terminal_color = v:true
   let g:doom_one_italic_comments = v:true
   let g:doom_one_cursor_coloring = v:true
@@ -56,6 +73,8 @@ function! s:my_theme_dict.doom_one() dict abort
 endfunction
 
 function! s:my_theme_dict.everforest() dict abort
+  packadd! everforest
+
   let g:everforest_enable_italic = 1
   let g:everforest_better_performance = 1
   colorscheme everforest