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local misc = require('core.misc')
local map = misc.map

return { 'lewis6991/gitsigns.nvim',
  disable = vim.version().minor < 9,
  function()
    local gs = require("gitsigns")

    gs.setup {
      signs = {
        add          = { text = '│' },
        change       = { text = '│' },
        delete       = { text = '-' },
        topdelete    = { text = '‾' },
        changedelete = { text = '~' },
        untracked    = { text = '┆' }
      },

      signcolumn = true,
      numhl      = false,
      linehl     = false,
      word_diff  = false,

      watch_gitdir = {
        interval = 1000,
        follow_files = true
      },

      attach_to_untracked = true,
      current_line_blame_formatter = '<author>, <author_time:%Y-%m-%d> - <summary>',

      preview_config = { border = 'solid' },

      on_attach = function(bufnr)
        local opts = { buffer = bufnr }

        -- 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, buffer = bufnr })

        map('n', '[c', function()
          if vim.wo.diff then
            return '[c'
          end
          vim.schedule(function() gs.prev_hunk() end)
          return '<Ignore>'
        end, { expr = true, buffer = bufnr })

        -- Actions
        map('n', '<leader>hs', gs.stage_hunk, opts)
        map('n', '<leader>hr', gs.reset_hunk, opts)
        map('v', '<leader>hs', function()
          gs.stage_hunk { vim.fn.line('.'), vim.fn.line('v') }
        end, opts)
        map('v', '<leader>hr', function()
          gs.reset_hunk { vim.fn.line('.'), vim.fn.line('v') }
        end, opts)
        map('n', '<leader>hS', gs.stage_buffer, opts)
        map('n', '<leader>hu', gs.undo_stage_hunk, opts)
        map('n', '<leader>hR', gs.reset_buffer, opts)
        map('n', '<leader>hp', gs.preview_hunk, opts)
        map('n', '<leader>hb', function() gs.blame_line { full=true } end, opts)
        map('n', '<leader>tb', gs.toggle_current_line_blame, opts)
        map('n', '<leader>hd', gs.diffthis, opts)
        map('n', '<leader>hD', function() gs.diffthis('~') end, opts)
        map('n', '<leader>td', gs.toggle_deleted, opts)

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