Add gitsigns config file.

lua/plugins.lua

@@ -41,7 +41,7 @@ return require('packer').startup(function(use)
   use ({
     'lewis6991/gitsigns.nvim',
     requires = {'nvim-lua/plenary.nvim'},
-    config = function() require('gitsigns').setup() end
+    config = function() require('plugins.gitsigns') end
   })
 
   -- LSP server

lua/plugins/gitsigns.lua

@@ -0,0 +1,31 @@
+require('gitsigns').setup{
+  on_attach = function(bufnr)
+    local gs = package.loaded.gitsigns
+
+    local function map(mode, l, r, opts)
+      opts = opts or {}
+      opts.buffer = bufnr
+      vim.keymap.set(mode, l, r, opts)
+    end
+
+    -- Navigation
+    map('n', ']c', "&diff ? ']c' : '<cmd>Gitsigns next_hunk<CR>'", {expr=true})
+    map('n', '[c', "&diff ? '[c' : '<cmd>Gitsigns prev_hunk<CR>'", {expr=true})
+
+    -- Actions
+    map({'n', 'v'}, '<leader>hs', ':Gitsigns stage_hunk<CR>')
+    map({'n', 'v'}, '<leader>hr', ':Gitsigns reset_hunk<CR>')
+    map('n', '<leader>hS', gs.stage_buffer)
+    map('n', '<leader>hu', gs.undo_stage_hunk)
+    map('n', '<leader>hR', gs.reset_buffer)
+    map('n', '<leader>hp', gs.preview_hunk)
+    map('n', '<leader>hb', function() gs.blame_line{full=true} end)
+    map('n', '<leader>tb', gs.toggle_current_line_blame)
+    map('n', '<leader>hd', gs.diffthis)
+    map('n', '<leader>hD', function() gs.diffthis('~') end)
+    map('n', '<leader>td', gs.toggle_deleted)
+
+    -- Text object
+    map({'o', 'x'}, 'ih', ':<C-U>Gitsigns select_hunk<CR>')
+  end
+}