nixos/config/nvim/lua/plugins/gitsigns.lua

return {
    "lewis6991/gitsigns.nvim",
    event = { "BufReadPre", "BufNewFile" },
    config = function()
        require("gitsigns").setup {
            signcolumn = true,
            numhl = true,
            linehl = false,
            current_line_blame = true,
            word_diff = false,
            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", function()
                    if vim.wo.diff then return "]c" end
                    vim.schedule(function() gs.next_hunk() end)
                    return "<Ignore>"
                end, { expr = true })

                map("n", "[c", function()
                    if vim.wo.diff then return "[c" end
                    vim.schedule(function() gs.prev_hunk() end)
                    return "<Ignore>"
                end, { 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,
        }
    end,
}