nvim: Drop signify and switch to gitsigns

signify seems to be giving an error after somewhat long usage of
"E489: too many highlight and syntax groups".

nvim/.config/nvim/after/plugin/gitsigns.lua

@@ -0,0 +1,65 @@
+require('gitsigns').setup {
+  status_formatter    = nil,
+  sign_priority       = 6,
+  update_debounce     = 100,
+  max_file_length     = 10000,
+  signcolumn          = true,
+  numhl               = false,
+  linehl              = false,
+  word_diff           = false,
+  attach_to_untracked = false,
+  current_line_blame  = false,
+  current_line_blame_opts = {
+    virt_text     = true,
+    virt_text_pos = 'eol', -- 'eol' | 'overlay' | 'right_align'
+    delay         = 1000,
+  },
+  watch_gitdir = {
+    interval     = 1000,
+    follow_files = true
+  },
+  current_line_blame_formatter_opts = {
+    relative_time = false
+  },
+  preview_config = {
+    -- Options passed to nvim_open_win
+    border   = 'single',
+    style    = 'minimal',
+    relative = 'cursor',
+    row      = 0,
+    col      = 1
+  },
+  yadm = {
+    enable = false
+  },
+  signs = {
+    add          = { hl = 'GitSignsAdd'   , text = '│', numhl='GitSignsAddNr'   , linehl='GitSignsAddLn'    },
+    change       = { hl = 'GitSignsChange', text = '│', numhl='GitSignsChangeNr', linehl='GitSignsChangeLn' },
+    delete       = { hl = 'GitSignsDelete', text = '_', numhl='GitSignsDeleteNr', linehl='GitSignsDeleteLn' },
+    topdelete    = { hl = 'GitSignsDelete', text = '‾', numhl='GitSignsDeleteNr', linehl='GitSignsDeleteLn' },
+    changedelete = { hl = 'GitSignsChange', text = '~', numhl='GitSignsChangeNr', linehl='GitSignsChangeLn' },
+  },
+  keymaps = {
+    noremap          = true,
+
+    ['n ]c']         = { expr = true, "&diff ? ']c' : '<cmd>lua require\"gitsigns.actions\".next_hunk()<CR>'" },
+    ['n [c']         = { expr = true, "&diff ? '[c' : '<cmd>lua require\"gitsigns.actions\".prev_hunk()<CR>'" },
+
+    ['n <Leader>hl'] = '<cmd>lua require"gitsigns".setloclist()<CR>',
+    ['n <Leader>hp'] = '<cmd>lua require"gitsigns".preview_hunk()<CR>',
+    ['n <Leader>hq'] = '<cmd>lua require"gitsigns".setqflist()<CR>',
+    ['n <Leader>hQ'] = '<cmd>lua require"gitsigns".setqflist("attached")<CR>',
+    ['n <Leader>hr'] = '<cmd>lua require"gitsigns".reset_hunk()<CR>',
+    ['v <Leader>hr'] = '<cmd>lua require"gitsigns".reset_hunk({vim.fn.line("."), vim.fn.line("v")})<CR>',
+    ['n <Leader>hR'] = '<cmd>lua require"gitsigns".reset_buffer()<CR>',
+    ['n <Leader>hs'] = '<cmd>lua require"gitsigns".stage_hunk()<CR>',
+    ['v <Leader>hs'] = '<cmd>lua require"gitsigns".stage_hunk({vim.fn.line("."), vim.fn.line("v")})<CR>',
+    ['n <Leader>hS'] = '<cmd>lua require"gitsigns".stage_buffer()<CR>',
+    ['n <Leader>ht'] = '<cmd>lua require"gitsigns".toggle_signs()<CR>',
+    ['n <Leader>hu'] = '<cmd>lua require"gitsigns".undo_stage_hunk()<CR>',
+    ['n <Leader>hU'] = '<cmd>lua require"gitsigns".reset_buffer_index()<CR>',
+
+    ['o ih']         = ':<C-U>lua require"gitsigns.actions".select_hunk()<CR>',
+    ['x ih']         = ':<C-U>lua require"gitsigns.actions".select_hunk()<CR>'
+  },
+}

nvim/.config/nvim/after/plugin/signify.lua

@@ -1,12 +0,0 @@
-local remap = vim.api.nvim_set_keymap
-
-remap('n', 'ghr', ':SignifyHunkUndo<CR>', { noremap = true })
-remap('n', 'ghp', ':SignifyHunkDiff<CR>', { noremap = true })
-remap('n', ']c',  '<Plug>(signify-next-hunk)', { noremap = false })
-remap('n', '[c',  '<Plug>(signify-prev-hunk)', { noremap = false })
-remap('n', ']C',  '9999]c', { noremap = false })
-remap('n', '[C',  '9999[c', { noremap = false })
-remap('o', 'ih',  '<Plug>(signify-motion-inner-pending)', { noremap = false })
-remap('x', 'ih',  '<Plug>(signify-motion-inner-visual)',  { noremap = false })
-remap('o', 'ah',  '<Plug>(signify-motion-outer-pending)', { noremap = false })
-remap('x', 'ah',  '<Plug>(signify-motion-outer-visual)',  { noremap = false })

nvim/.config/nvim/lua/plugins.lua

@@ -21,7 +21,7 @@ local init = function ()
   -- For autocompletion
   use 'hrsh7th/nvim-compe'
   -- Git support
-  use 'mhinz/vim-signify'
+  use 'lewis6991/gitsigns.nvim'
   use 'tpope/vim-fugitive'
   use 'rhysd/git-messenger.vim'
   use 'whiteinge/diffconflicts'