Switch vim colorscheme to gruvbox (#23)

.config/nvim/colors/noclown.vim

@@ -0,0 +1,179 @@
+" noclown
+"
+" A mostly color free theme with a goal of not making your code look like a
+" clown threw up.
+"
+" Propaganda:
+" -- Visual clutter saps mental energy.
+"
+" * http://www.linusakesson.net/programming/syntaxhighlighting/
+" * http://kyleisom.net/blog/2012/10/17/syntax-off/
+" * https://www.robertmelton.com/2016/04/10/syntax-highlighting-off/
+"
+" PUBLIC DOMAIN
+" To the extent possible under law, Berk D. Demir has waived all copyright and
+" related or neighboring rights to noclown color scheme for Vim.
+" This work is published from: United States.
+
+
+highlight clear
+if exists('syntax_on')
+  syntax reset
+endif
+let g:colors_name = "noclown"
+
+" Terminals that don't support italics, resort to rendering them as standout.
+" For comments and other things we italicize, this can become annoying very
+" quickly.  We are going to ignore 'italic' attribute if the terminal doesn't
+" know about it.
+if (has('gui_running') ||
+      \ has('unix') && system('tput sitm') == "\e[3m")
+  let g:noclown_has_italics = 1
+endif
+
+let s:palette = {
+      \ 'foreground' : [250, '#bcbcbc'],
+      \ 'background' : [234, '#1c1c1c'],
+      \ 'fade'       : [245, '#8a8a8a'],
+      \ 'fade-more'  : [238, '#444444'],
+      \ 'highlight'  : [230, '#ffffd7'],
+      \ 'attention'  : [224, '#ffd7d7'],
+      \ 'error'      : [203, '#ff5f5f'],
+      \ }
+
+function! s:fg(name)
+  let [l:ctermfg, l:guifg] = s:palette[a:name]
+  return {'ctermfg': l:ctermfg, 'guifg': l:guifg}
+endfunction
+
+function! s:bg(name)
+  let [l:ctermfg, l:guifg] = s:palette[a:name]
+  return {'ctermbg': l:ctermfg, 'guibg': l:guifg}
+endfunction
+
+function! s:attr(...)
+  let l:alist = a:000
+
+  if !exists('g:noclown_has_italics')
+    " We're going to modify the list, so make a copy (a:* are immutable)
+    let l:alist = copy(a:000)
+    call filter(l:alist, 'v:val != "italic"')
+  endif
+
+  " l:attrs: comma separated 'l:alist' as string or if empty: 'NONE'
+  let l:attrs = empty(l:alist) ? 'NONE' : join(l:alist, ',')
+
+  return {'term': l:attrs, 'cterm': l:attrs, 'gui': l:attrs}
+endfunction
+
+" Clear every attribute to NONE to avoid inheriting from default colorscheme.
+let s:hi_clear = {}
+for key in ['term', 'cterm', 'ctermfg', 'ctermbg', 'gui', 'guifg', 'guibg']
+  let s:hi_clear[key] = 'NONE'
+endfor
+
+function! s:Defn(group, ...)
+  let l:hi_dict = copy(s:hi_clear)
+
+  " Merge attribute group definitions to main dictionary
+  for setting in a:000
+    call extend(l:hi_dict, setting)
+  endfor
+
+  let l:hi_expr = 'highlight ' . a:group  . ' '
+  " Convert { k1: v1, k2: v2, ..., kn: vn} dictionary to 'k1=v1 k2=v2 ... kn=vn' string
+  let l:hi_expr .= join(map(items(l:hi_dict), 'join(v:val, "=")'), ' ')
+
+  execute l:hi_expr
+endfunction
+
+function! s:None(group)
+  execute 'highlight ' . a:group . ' NONE'
+endfunction
+
+function! s:Link(from, to)
+  call s:None(a:from)
+  execute 'highlight link ' . a:from . ' ' . a:to
+endfunction
+
+" Suggested group names from naming conventions -- ':h E669'
+call s:Defn('Comment', s:fg('fade'), s:attr('italic'))
+call s:None('Constant') "<- String Character Number Boolean Float
+call s:None('Identifier') "<- Function
+call s:None('Statement') "<- Conditional Repeat Label Operator Keyword Exception
+call s:None('PreProc') "<- Include Define Macro PreCondit
+call s:None('Type') "<- StorageClass Structure Typedef
+call s:None('Special') "<- SpecialChar Tag Delimiter SpecialComment Debug
+call s:Defn('Underlined', s:attr('underline'))
+call s:Defn('Ignore', s:fg('fade-more'))
+call s:Defn('Error', s:fg('error'))
+call s:Defn('Todo', s:attr('reverse'))
+
+" Default group names -- ':h highlight-default'
+call s:Defn('Normal', s:fg('foreground'), s:bg('background'))
+
+call s:Defn('SpecialKey', s:fg('fade'))
+call s:Defn('NonText', s:fg('fade-more'))
+call s:Link('CursorLineNr', 'SpecialKey')
+call s:Link('LineNr', 'NonText')
+call s:None('CursorLine')
+
+call s:Defn('VertSplit', s:fg('fade'), s:bg('fade-more'))
+call s:Link('StatusLineNC', 'VertSplit')
+
+call s:Defn('StatusLine', s:attr('reverse'))
+call s:Defn('Visual', s:attr('reverse'))
+call s:Defn('MatchParen', s:attr('reverse'))
+
+call s:Defn('Title', s:fg('highlight'))  " titles for output from ':set all', ':autocmd' etc.
+call s:Link('Question', 'Title')
+call s:Link('MoreMsg', 'Title')
+call s:Link('IncSearch', 'Title')
+call s:Defn('Search', s:fg('highlight'), s:attr('reverse'))
+call s:Link('WildMenu', 'Search')
+
+call s:Defn('WarningMsg', s:fg('attention'))
+call s:Defn('ErrorMsg', s:fg('error'))
+
+call s:Defn('Pmenu', s:bg('fade-more'))
+call s:Defn('PMenuSel', s:fg('highlight'), s:bg('fade'))
+call s:Defn('PMenuSbar', s:fg('fade'), s:bg('fade'))
+call s:Defn('PMenuThumb', s:fg('fade'), s:bg('highlight'))
+
+call s:Defn('SpellBad', s:fg('attention'), s:attr('italic'))
+call s:Link('SpellCap', 'Underlined')
+call s:Link('SpellLocal', 'SpellCap')
+call s:Link('SpellRare', 'SpellCap')
+
+call s:Defn('Folded', s:fg('highlight'), s:bg('fade'))
+call s:Defn('FoldColumn', s:fg('highlight'), s:bg('fade-more'))
+
+call s:Defn('DiffAdd', s:attr('bold'), s:bg('fade-more'))
+call s:Defn('DiffChange', s:bg('fade-more'))
+call s:Defn('DiffDelete', s:fg('error'), s:bg('fade-more'))
+call s:Defn('DiffText', s:bg('attention'), s:fg('background'))
+
+" QuickFix
+call s:Defn('qfFileName', s:fg('fade'))
+
+""""
+""" Unmodified groups from default group names list.
+""" They retain their colorscheme from Vim's defaults.
+"""
+"ColorColumn	used for the columns set with 'colorcolumn'
+"Conceal		placeholder characters substituted for concealed
+"		text (see 'conceallevel')
+"Cursor		the character under the cursor
+"CursorIM	like Cursor, but used when in IME mode |CursorIM|
+"CursorColumn	the screen column that the cursor is in when 'cursorcolumn' is
+"		set
+"Directory	directory names (and other special names in listings)
+"EndOfBuffer	filler lines (~) after the last line in the buffer.
+"		By default, this is highlighted like |hl-NonText|.
+"SignColumn	column where |signs| are displayed
+"ModeMsg		'showmode' message (e.g., "-- INSERT --")
+"TabLine		tab pages line, not active tab page label
+"TabLineFill	tab pages line, where there are no labels
+"TabLineSel	tab pages line, active tab page label
+"VisualNOS	Visual mode selection when vim is "Not Owning the Selection".
+"		Only X11 Gui's |gui-x11| and |xterm-clipboard| supports this.