opdavies.nvim/after/plugin/gitsigns.lua

local gitsigns_status_ok, gitsigns = pcall(require, "gitsigns")
if not gitsigns_status_ok then
  return
end

gitsigns.setup {
  linehl = false,
  numhl = true,
}

local bufnr = vim.api.nvim_get_current_buf()

local map = require "opdavies.keymap".map
local nmap = require "opdavies.keymap".nmap
local vmap = require "opdavies.keymap".vmap

nmap { '[h', "&diff ? '[c' : '<cmd>Gitsigns prev_hunk<CR>'", { expr = true, buffer = bufnr }}
nmap { ']h', "&diff ? ']c' : '<cmd>Gitsigns next_hunk<CR>'", { expr = true, buffer = bufnr }}

nmap { '<leader>hR', gitsigns.reset_buffer }
nmap { '<leader>hS', gitsigns.stage_buffer }
nmap { '<leader>hp', gitsigns.preview_hunk }
nmap { '<leader>hr', gitsigns.reset_hunk }
nmap { '<leader>hs', gitsigns.stage_hunk }
nmap { '<leader>hu', gitsigns.undo_stage_hunk }
vmap { '<leader>hr', function() gitsigns.reset_hunk { vim.fn.line('.'), vim.fn.line('v') } end }
vmap { '<leader>hs', function() gitsigns.stage_hunk { vim.fn.line('.'), vim.fn.line('v')} end }

-- Text object.
map{ {'o', 'x'}, 'ih', ':<C-U>Gitsigns select_hunk<CR>' }