nixos-config/home/editors/neovim/gitsigns.lua

require("gitsigns").setup {
  on_attach = function(bufnr)
    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", "<leader>hs", ":Gitsigns stage_hunk<CR>")
    map("v", "<leader>hs", ":Gitsigns stage_hunk<CR>")
    map("n", "<leader>hr", ":Gitsigns reset_hunk<CR>")
    map("v", "<leader>hr", ":Gitsigns reset_hunk<CR>")
    map("n", "<leader>hS", "<cmd>Gitsigns stage_buffer<CR>")
    map("n", "<leader>hu", "<cmd>Gitsigns undo_stage_hunk<CR>")
    map("n", "<leader>hR", "<cmd>Gitsigns reset_buffer<CR>")
    map("n", "<leader>hp", "<cmd>Gitsigns preview_hunk<CR>")
    map("n", "<leader>hb", "<cmd>lua require'gitsigns'.blame_line{full=true}<CR>")
    map("n", "<leader>tb", "<cmd>Gitsigns toggle_current_line_blame<CR>")
    map("n", "<leader>hd", "<cmd>Gitsigns diffthis<CR>")
    map("n", "<leader>hD", "<cmd>lua require'gitsigns'.diffthis('~')<CR>")
    map("n", "<leader>td", "<cmd>Gitsigns toggle_deleted<CR>")

    -- Text object
    map("o", "ih", ":<C-U>Gitsigns select_hunk<CR>")
    map("x", "ih", ":<C-U>Gitsigns select_hunk<CR>")
  end
}