nvim/lua/user/gitsigns.lua

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

gitsigns.setup {
  signs = {
    add = { hl = "GitSignsAdd", text = "▎", numhl = "GitSignsAddNr", linehl = "GitSignsAddLn" },
    change = { hl = "GitSignsChange", text = "▎", numhl = "GitSignsChangeNr", linehl = "GitSignsChangeLn" },
    delete = { hl = "GitSignsDelete", text = "契", numhl = "GitSignsDeleteNr", linehl = "GitSignsDeleteLn" },
    topdelete = { hl = "GitSignsDelete", text = "契", numhl = "GitSignsDeleteNr", linehl = "GitSignsDeleteLn" },
    changedelete = { hl = "GitSignsChange", text = "▎", numhl = "GitSignsChangeNr", linehl = "GitSignsChangeLn" },
  },
  signcolumn = true, -- Toggle with `:Gitsigns toggle_signs`
  watch_gitdir = {
    interval = 1000,
    follow_files = true,
  },
  attach_to_untracked = true,
  current_line_blame_opts = {
    virt_text = true,
    virt_text_pos = "eol", -- 'eol' | 'overlay' | 'right_align'
    delay = 1000,
  },
  sign_priority = 6,
  update_debounce = 100,
  status_formatter = nil, -- Use default
  preview_config = {
    -- Options passed to nvim_open_win
    border = "single",
    style = "minimal",
    relative = "cursor",
    row = 0,
    col = 1,
  },
  on_attach = function (bufnr)
    local gs = package.loaded.gitsigns
    local opts = { buffer=bufnr, silent=true }
    vim.keymap.set('n', '<Leader>hp', gs.preview_hunk, opts)
    vim.keymap.set('n', '<Leader>hb', function() gs.blame_line{full=false} end, opts)
    vim.keymap.set('n', '<Leader>hB', function() gs.blame_line{full=true} end, opts)
  end
}