dotfiles/.config/nixpkgs/neovim/plugins.lua

-- add extra filetypes for plenary
require('plenary.filetype').add_table({
  extension = {
    ['elv'] = [[elvish]]
  }
})

-- add extra builtin filetypes
vim.filetype.add({
  pattern = {
    ['.*%.ts$'] = 'typescript'
  },
})

-- helpers
local function resolve_git_path(buf_id)
  local bufname = vim.api.nvim_buf_get_name(buf_id)
  if not vim.startswith(bufname, "fugitive://") then
    return false
  end

  local parsed = vim.fn.FugitiveParse(bufname)
  local resolved_path = parsed[1]
  local repo = parsed[2]

  if resolved_path == "" then
    return false
  end

  local parts = vim.split(resolved_path, ':')
  local commit = parts[1]
  local path = parts[2]

  return {
    repo = repo,
    commit = commit,
    path = path,
  }
end

-- file/buffer/etc picker
local telescope_actions = require('telescope.actions')
local action_state = require('telescope.actions.state')
local actions = {}

actions.git_show_commit = function(prompt_bufnr)
  local selection = action_state.get_selected_entry()
  local path = vim.fn.FugitiveFind(selection.value)
  telescope_actions.close(prompt_bufnr)
  vim.cmd.edit(path)
end

local commit_mappings = {
  i = {
    ['<CR>'] = actions.git_show_commit,
    ['<C-r>c'] = telescope_actions.git_checkout,
  }
}

require('telescope').setup({
  defaults = {
    mappings = {
      i = {
        ['jj'] = 'close',
      },
    },
    layout_config = {
      prompt_position = 'top',
    },
    sorting_strategy = 'ascending',
    -- use filename as preview window title
    dynamic_preview_title = true,

    path_display = {
      -- shorten directory names of everything but the last 3 parts
      -- foo/bar/baz/file.txt -> f/boo/bar/file.txt
      shorten = { len = 1, exclude = { -3, -2, -1 } },

      -- truncate the beginning of the file name if wider than the window
      truncate = true,
    },

    preview = {
      -- don't preview files larger than 1MB
      filesize_limit = 1,
      timeout = 500,
    },

    vimgrep_arguments = {
      -- defaults
      "rg",
      "--color=never",
      "--no-heading",
      "--with-filename",
      "--line-number",
      "--column",
      "--smart-case",
      -- search "hidden" files except git folder
      "--hidden",
      "--iglob=!.git"
    },

    -- ignore things we're likely not to edit
    file_ignore_patterns = {
      "%.zip$",
      "%.yarn/releases/",
      "%.yarn/plugins/"
    },

    -- picker history
    cache_picker = {
      num_pickers = 10,
    },
  },
  pickers = {
    buffers = {
      sort_lastused = true,
      sort_mru = true,
      mappings = {
        i = {
          ['<C-k>'] = 'delete_buffer'
        },
      },
    },
    find_files = {
      find_command = { "fd", "--type", "f", "--strip-cwd-prefix" }
    },
    git_commits = {
      mappings = commit_mappings,
    },
    git_bcommits = {
      mappings = commit_mappings,
    },
  },
})

-- use native sorter for better performance
require('telescope').load_extension('fzf')

local telescope_builtin = require('telescope.builtin')
local telescope_pickers = require('telescope.pickers')
local telescope_finders = require('telescope.finders')
local telescope_previewers = require('telescope.previewers')
local telescope_putils = require('telescope.previewers.utils')
local telescope_conf = require('telescope.config').values

-- custom picker to fallback to files if no git
_G.project_files = function()
  local ok = pcall(telescope_builtin.git_files, { show_untracked = true })
  if not ok then telescope_builtin.find_files({}) end
end

-- custom picker for files within a commit
_G.commit_files = function(opts)
  local resolved = resolve_git_path(0)
  if not resolved then
    vim.print("current file is not a fugitive path")
    return
  end

  opts = opts or {}
  telescope_pickers.new(opts, {
    prompt_title = resolved.commit,
    finder = telescope_finders.new_oneshot_job({ "git", "ls-tree", "--name-only", "-r", resolved.commit }, {
      entry_maker = function(entry)
        local path = string.format("fugitive://%s//%s/%s", resolved.repo, resolved.commit, entry)
        return {
          path = path,
          value = entry,
          display = entry,
          ordinal = entry,
        }
      end,
    }),
    sorter = telescope_conf.file_sorter(opts),

    -- the builtin previewer has fancy async loading which doesn't work for
    -- fugitive paths so we have to define our own
    previewer = telescope_previewers.new_buffer_previewer({
      title = function(self)
        return 'Commit Files'
      end,
      dyn_title = function(self, entry)
        return entry.value
      end,
      define_preview = function(self, entry, status)
        -- the builtin previewer does more things like using mime type
        -- fallbacks as well as binary file detection which ours doesn't do
        local ft = telescope_putils.filetype_detect(entry.value)

        vim.api.nvim_buf_call(self.state.bufnr, function()
          vim.cmd('Gread ' .. entry.path)
          telescope_putils.highlighter(self.state.bufnr, ft, opts)
        end)
      end,
    }),
  }):find()
end

-- shows added/removed/changed lines
local MiniDiff = require('mini.diff')
MiniDiff.setup({
  view = {
    style = 'sign',
    signs = {
      delete = '_',
    },
  },
  source = {
    MiniDiff.gen_source.git(),
    -- handle fugitive paths
    {
      name = "fugitive",
      attach = function(buf_id)
        local resolved = resolve_git_path(buf_id)
        if not resolved or resolved.path == "" then
          return false
        end

        local source = vim.fn.FugitiveFind(string.format("%s~1:%s", resolved.commit, resolved.path))
        local text = vim.fn['fugitive#readfile'](source)
        MiniDiff.set_ref_text(buf_id, text)
      end
    }
  }
})

local function section_git(args)
  if MiniStatusline.is_truncated(args.trunc_width) then return '' end
  return vim.fn.FugitiveHead()
end

require('mini.statusline').setup({
  content = {
    -- copy-pasted from default, we just want to remove the icon
    active = function()
      local mode, mode_hl = MiniStatusline.section_mode({ trunc_width = 120 })
      local git           = section_git({ trunc_width = 75 })
      local diagnostics   = MiniStatusline.section_diagnostics({ trunc_width = 75, icon = '' })
      local filename      = MiniStatusline.section_filename({ trunc_width = 140 })
      local fileinfo      = MiniStatusline.section_fileinfo({ trunc_width = 120 })
      local location      = MiniStatusline.section_location({ trunc_width = 75 })

      return MiniStatusline.combine_groups({
        { hl = mode_hl,                  strings = { mode } },
        { hl = 'MiniStatuslineDevinfo',  strings = { git, diagnostics } },
        '%<', -- Mark general truncate point
        { hl = 'MiniStatuslineFilename', strings = { filename } },
        '%=', -- End left alignment
        { hl = 'MiniStatuslineFileinfo', strings = { fileinfo } },
        { hl = mode_hl,                  strings = { location } },
      })
    end
  },
})

-- delete buffer while preserving layout
require('mini.bufremove').setup()

-- shows a line indicating the current indentation scope
require('mini.indentscope').setup()

-- comment actions
require('mini.comment').setup()

-- surround actions
require('mini.surround').setup({
  custom_surroundings = {
    -- js template string
    ['$'] = {
      output = {
        left = '`${',
        right = '}`',
      },
    },
  },
})

local spec_treesitter = require('mini.ai').gen_spec.treesitter

require('mini.ai').setup({
  custom_textobjects = {
    [','] = spec_treesitter({
      a = '@parameter.outer',
      i = '@parameter.inner',
    }),
  },
});

-- align actions
require('mini.align').setup()

-- repeatable f/t
require('mini.jump').setup({
  mappings = {
    repeat_jump = '',
  },
  delay = {
    highlight = 10000000,
  },
})

-- autopair brackets
require('mini.pairs').setup({
  mappings = {
    -- default config includes (, [ and {

    -- autopair <> if preceded by a character, otherwise it might be a regular
    -- comparison operation
    ['<'] = { action = 'open', pair = '<>', neigh_pattern = '%w.' },
    ['>'] = { action = 'close', pair = '<>' },
  },
})

-- notifications
require('mini.notify').setup()
vim.notify = require('mini.notify').make_notify()

-- file explorer
require('mini.files').setup({
  content = {
    -- remove icons
    prefix = function() end,
  }
})

-- rest client
require('kulala').setup({
  global_keymaps = true,
  global_keymaps_prefix = '<leader>r'
})

-- Use Treesitter for syntax highlighting
require('nvim-treesitter.configs').setup({
  highlight = {
    enable = true,
  },
  indent = {
    enable = true,
  },
  incremental_selection = {
    enable = true,
    keymaps = {
      init_selection = "]t",
      node_incremental = "]t",
      node_decremental = "[t",
    },
  },
  textobjects = {
    swap = {
      enable = true,
      swap_next = {
        ['>,'] = '@parameter.inner',
      },
      swap_previous = {
        ['<,'] = '@parameter.inner',
      },
    },
  },
})

local tsj_utils = require('treesj.langs.utils')

-- Treesitter-aware split/join
require('treesj').setup({
  use_default_keymaps = false,
})

-- Treesitter context
require('treesitter-context').setup({
  enable = true,
  multiline_threshold = 5,
})

-- Treesitter navigation
require('treewalker').setup()

-- completion
require('blink.cmp').setup({
  cmdline = {
    enabled = false,
  },
  completion = {
    accept = {
      auto_brackets = {
        enabled = false,
      },
    },
    documentation = {
      auto_show = true,
      auto_show_delay_ms = 500,
    },
    trigger = {
      prefetch_on_insert = false,
      show_on_keyword = false,
      show_on_trigger_character = false,
    },
    menu = {
      draw = {
        columns = {
          { "label", "label_description", gap = 1 },
          { "kind" },
        },
      },
    },
  },
  keymap = {
    ['<Enter>'] = { 'select_and_accept', 'fallback' },
    ['<C-u>'] = { 'scroll_documentation_up', 'fallback_to_mappings' },
    ['<C-d>'] = { 'scroll_documentation_down', 'fallback_to_mappings' },
  },
})

-- typescript-vim compiler options
vim.g.typescript_compiler_options = '--incremental --noEmit'

-- stuff
_G.toggle_end_char = function(char)
  local cursor = vim.api.nvim_win_get_cursor(0)
  local row = cursor[1] - 1
  local end_char = vim.api.nvim_buf_get_text(0, row, -2, row, -1, {})[1]
  if end_char == char then
    vim.api.nvim_buf_set_text(0, row, -2, row, -1, {})
  else
    vim.api.nvim_buf_set_text(0, row, -1, row, -1, { char })
  end
end