tabline/bufferline: convert to setupOpts

this is pretty much WIP and contains a bunch of bugs that I haven't tackled yet.

modules/plugins/tabline/nvim-bufferline/config.nix

@@ -6,42 +6,20 @@
   inherit (lib.modules) mkIf mkMerge;
   inherit (lib.nvim.binds) mkLuaBinding mkBinding pushDownDefault;
   inherit (lib.nvim.dag) entryAnywhere;
+  inherit (lib.nvim.lua) toLuaObject;
 
   cfg = config.vim.tabline.nvimBufferline;
 
   self = import ./nvim-bufferline.nix {inherit lib;};
   inherit (self.options.vim.tabline.nvimBufferline) mappings;
 in {
-  config = mkIf cfg.enable (
+  config = mkIf cfg.enable {
-    let
-      mouse = {
-        right = "'vertical sbuffer %d'";
-        close = ''
-          function(bufnum)
-            require("bufdelete").bufdelete(bufnum, false)
-          end
-        '';
-      };
-    in {
     vim = {
       startPlugins = [
         (assert config.vim.visuals.nvimWebDevicons.enable; "nvim-bufferline-lua")
         "bufdelete-nvim"
       ];
 
-        maps.normal = mkMerge [
-          (mkLuaBinding cfg.mappings.closeCurrent "require(\"bufdelete\").bufdelete" mappings.closeCurrent.description)
-          (mkBinding cfg.mappings.cycleNext ":BufferLineCycleNext<CR>" mappings.cycleNext.description)
-          (mkBinding cfg.mappings.cycleNext ":BufferLineCycleNext<CR>" mappings.cycleNext.description)
-          (mkBinding cfg.mappings.cyclePrevious ":BufferLineCyclePrev<CR>" mappings.cyclePrevious.description)
-          (mkBinding cfg.mappings.pick ":BufferLinePick<CR>" mappings.pick.description)
-          (mkBinding cfg.mappings.sortByExtension ":BufferLineSortByExtension<CR>" mappings.sortByExtension.description)
-          (mkBinding cfg.mappings.sortByDirectory ":BufferLineSortByDirectory<CR>" mappings.sortByDirectory.description)
-          (mkLuaBinding cfg.mappings.sortById "function() require(\"bufferline\").sort_buffers_by(function (buf_a, buf_b) return buf_a.id < buf_b.id end) end" mappings.sortById.description)
-          (mkBinding cfg.mappings.moveNext ":BufferLineMoveNext<CR>" mappings.moveNext.description)
-          (mkBinding cfg.mappings.movePrevious ":BufferLineMovePrev<CR>" mappings.movePrevious.description)
-        ];
-
       binds.whichKey.register = pushDownDefault {
         "<leader>b" = "+Buffer";
         "<leader>bm" = "BufferLineMove";
@@ -50,57 +28,8 @@ in {
       };
 
       luaConfigRC.nvimBufferline = entryAnywhere ''
-          require("bufferline").setup{
+        require("bufferline").setup({options = ${toLuaObject cfg.setupOpts}})
-             options = {
-                mode = "buffers",
-                numbers = "both",
-                close_command = ${mouse.close},
-                right_mouse_command = ${mouse.right},
-                indicator = {
-                  style = 'icon',
-                  indicator_icon = '▎',
-                },
-                buffer_close_icon = '󰅖',
-                modified_icon = '●',
-                close_icon = '',
-                left_trunc_marker = '',
-                right_trunc_marker = '',
-                max_name_length = 18,
-                max_prefix_length = 15,
-                tab_size = 18,
-                show_buffer_icons = true,
-                show_buffer_close_icons = true,
-                show_close_icon = true,
-                show_tab_indicators = true,
-                persist_buffer_sort = true,
-                --separator_style = "thin",
-                separator_style = { " ", " " },
-                enforce_regular_tabs = true,
-                always_show_bufferline = true,
-                offsets = {
-                  {filetype = "NvimTree", text = "File Explorer", text_align = "center"}
-                },
-                sort_by = 'extension',
-                diagnostics = "nvim_lsp", -- TODO: use coc if it's enabled
-                diagnostics_update_in_insert = true,
-                diagnostics_indicator = function(count, level, diagnostics_dict, context)
-                   local s = ""
-                   for e, n in pairs(diagnostics_dict) do
-                      local sym = e == "error" and ""
-                         or (e == "warning" and "" or "" )
-                      if(sym ~= "") then
-                      s = s .. " " .. n .. sym
-                      end
-                   end
-                   return s
-                end,
-                numbers = function(opts)
-                  return string.format('%s·%s', opts.raise(opts.id), opts.lower(opts.ordinal))
-                end,
-             }
-          }
       '';
     };
-    }
+  };
-  );
 }

modules/plugins/tabline/nvim-bufferline/nvim-bufferline.nix

@@ -1,6 +1,8 @@
 {lib, ...}: let
-  inherit (lib.options) mkEnableOption;
+  inherit (lib.options) mkOption mkEnableOption literalExpression;
+  inherit (lib.types) enum bool either nullOr str int listOf;
   inherit (lib.nvim.binds) mkMappingOption;
+  inherit (lib.nvim.types) mkPluginSetupOption luaInline;
 in {
   options.vim.tabline.nvimBufferline = {
     enable = mkEnableOption "neovim bufferline";
@@ -16,5 +18,319 @@ in {
       moveNext = mkMappingOption "Move next buffer" "<leader>bmn";
       movePrevious = mkMappingOption "Move previous buffer" "<leader>bmp";
     };
+
+    setupOpts = mkPluginSetupOption "Bufferline-nvim" {
+      mode = mkOption {
+        type = enum ["tabs" "buffers"];
+        default = "tabs";
+        description = "Mode to use for bufferline";
+      };
+
+      themable = mkOption {
+        type = bool;
+        default = true;
+        description = ''
+          Whether or not highlight groups to be overriden.
+
+          While false, bufferline.nvim sets highlights as default
+        '';
+      };
+
+      numbers = mkOption {
+        type = either (enum ["none" "ordinal" "buffer_id" "both"]) luaInline;
+        default = lib.generators.mkLuaInline ''
+          function(opts)
+            return string.format('%s·%s', opts.raise(opts.id), opts.lower(opts.ordinal))
+          end
+        '';
+        description = "Whether or not to show buffer numbers";
+      };
+
+      close_command = mkOption {
+        type = either str luaInline;
+        default = lib.generators.mkLuaInline ''
+          function(bufnum)
+            require("bufdelete").bufdelete(bufnum, false)
+          end
+        '';
+        description = "Command to run when closing a buffer";
+      };
+
+      right_mouse_command = mkOption {
+        type = nullOr (either str luaInline);
+        default = "vertical sbuffer %d";
+        description = "Command to run when right clicking a buffer";
+      };
+
+      middle_mouse_command = mkOption {
+        type = nullOr (either str luaInline);
+        default = null;
+        description = "Command to run when middle clicking a buffer";
+      };
+
+      indicator = {
+        icon = mkOption {
+          type = nullOr str;
+          default = null;
+          description = ''
+            The indicatotor icon to use for current buffer.
+
+            ::: {.warning}
+            This **must** be ommitted while style is not `icon`
+            :::
+          '';
+        };
+
+        style = mkOption {
+          type = enum ["icon" "underline" "none"];
+          default = "underline";
+          description = "Style for indicator";
+        };
+      };
+
+      buffer_close_icon = mkOption {
+        type = str;
+        default = " 󰅖 ";
+        description = "Icon for close button";
+      };
+
+      modified_icon = mkOption {
+        type = str;
+        default = "● ";
+        description = "Icon for modified buffer";
+      };
+
+      close_icon = mkOption {
+        type = str;
+        default = "  ";
+        description = "Icon for close button";
+      };
+
+      left_trunc_marker = mkOption {
+        type = str;
+        default = "";
+        description = "Icon for left truncation";
+      };
+
+      right_trunc_marker = mkOption {
+        type = str;
+        default = "";
+        description = "Icon for right truncation";
+      };
+
+      name_formatter = mkOption {
+        type = nullOr luaInline;
+        default = null;
+        description = ''
+          `name_formatter` can be used to change the buffer's label in the
+          bufferline.
+
+          ::: {.note}
+          Some names can/will break the bufferline so use this at your
+          discretion knowing that it has some limitations that will
+          **NOT** be fixed.
+          :::
+        '';
+      };
+
+      max_name_length = mkOption {
+        type = int;
+        default = 18;
+        description = "Max name length";
+      };
+
+      max_prefix_length = mkOption {
+        type = int;
+        default = 15;
+        description = "Length of prefix used when a buffer is de-duplicated";
+      };
+
+      truncate_names = mkOption {
+        type = bool;
+        default = true;
+        description = "Truncate names";
+      };
+
+      diagnostics = mkOption {
+        type = enum [false "nvim_lsp" "coc"];
+        default = "nvim_lsp";
+        description = "Diagnostics provider to be used in buffer LSP indicators";
+      };
+
+      diagnostics_update_in_insert = mkOption {
+        type = bool;
+        default = false;
+        description = ''
+          Whether to update diagnostics while in insert mode.
+
+          Setting this to true has performance implications, but they may be
+          negligible depending on your setup. Set it to true if you know what
+          you are doing.
+        '';
+      };
+
+      diagnostics_indicator = mkOption {
+        type = nullOr luaInline;
+        default = lib.generators.mkLuaInline ''
+          function(count, level, diagnostics_dict, context)
+            local s = " "
+              for e, n in pairs(diagnostics_dict) do
+                local sym = e == "error" and "   "
+                  or (e == "warning" and "   " or "  " )
+                s = s .. n .. sym
+              end
+            return s
+          end
+        '';
+
+        description = ''
+          Function to get the diagnostics indicator.
+          The function should return a string to be used as the indicator.
+
+          Can be set to nil to keep the buffer name highlight, but delete the
+          highlighting.
+        '';
+      };
+
+      custom_filter = mkOption {
+        type = nullOr luaInline;
+        default = null;
+        example = literalExpression lib.generators.mkLuaInline ''
+          custom_filter = function(buf_number, buf_numbers)
+            -- filter out filetypes you don't want to see
+            if vim.bo[buf_number].filetype ~= "<i-dont-want-to-see-this>" then
+              return true
+            end
+            -- filter out by buffer name
+            if vim.fn.bufname(buf_number) ~= "<buffer-name-I-dont-want>" then
+                return true
+            end
+            -- filter out based on arbitrary rules
+            -- e.g. filter out vim wiki buffer from tabline in your work repo
+            if vim.fn.getcwd() == "<work-repo>" and vim.bo[buf_number].filetype ~= "wiki" then
+                return true
+            end
+            -- filter out by it's index number in list (don't show first buffer)
+            if buf_numbers[1] ~= buf_number then
+                return true
+            end
+          end
+        '';
+
+        description = ''
+          Custom filter function for filtering out buffers.
+
+          ::: {.note}
+          This will be called a lot, so you are encouraged to keep it as
+          short and lightweight as possible unless you are fully aware
+          of the performance implications.
+          :::
+        '';
+      };
+
+      color_icons = mkOption {
+        type = bool;
+        default = true;
+        description = "Whether or not to add filetype icon highlights";
+      };
+
+      show_buffer_icons = mkOption {
+        type = bool;
+        default = true;
+        description = "Whether or not to show buffer icons";
+      };
+
+      show_buffer_close_icons = mkOption {
+        type = bool;
+        default = true;
+        description = "Whether or not to show buffer close icons";
+      };
+
+      show_close_icon = mkOption {
+        type = bool;
+        default = true;
+        description = "Whether or not to show close icon";
+      };
+
+      show_tab_indicators = mkOption {
+        type = bool;
+        default = true;
+        description = "Whether or not to show tab indicators";
+      };
+
+      show_duplicate_prefix = mkOption {
+        type = bool;
+        default = true;
+        description = "Whether or not to show duplicate prefix";
+      };
+
+      duplicates_across_groups = mkOption {
+        type = bool;
+        default = true;
+        description = "Whether to consider duplicate paths in different groups as duplicates";
+      };
+
+      persist_buffer_sort = mkOption {
+        type = bool;
+        default = true;
+        description = "Whether or not custom sorted buffers should persist";
+      };
+
+      move_wraps_at_ends = mkOption {
+        type = bool;
+        default = false;
+        description = "Whether or not the move command \"wraps\" at the first or last position";
+      };
+
+      seperator_style = mkOption {
+        type = either (enum ["thick" "thin" "slope" "slant"]) (listOf str);
+        default = [" " " "];
+        description = ''
+          Style of the buffer separator.
+
+          Can be either one of the suspported values, or a list containing
+          **at most** two elements for `focused` and `unfocused` respectively.
+        '';
+      };
+
+      enforce_regular_tabs = mkOption {
+        type = bool;
+        default = false;
+        description = "Whether to enforce regular tabs";
+      };
+
+      always_show_bufferline = mkOption {
+        type = bool;
+        default = true;
+        description = "Whether to always show bufferline";
+      };
+
+      auto_toggle_bufferline = mkOption {
+        type = bool;
+        default = false;
+        description = "Whether to auto toggle bufferline";
+      };
+
+      hover = {
+        enabled = mkEnableOption "hover" // {default = true;};
+        delay = mkOption {
+          type = int;
+          default = 200;
+          description = "Delay for hover, in ms";
+        };
+
+        reveal = mkOption {
+          type = listOf str;
+          default = ["close"];
+          description = "Reveal hover window";
+        };
+      };
+
+      sort_by = mkOption {
+        type = either (enum ["insert_after_current" "insert_at_end" "id" "extension" "relative_directory" "directory" "tabs"]) luaInline;
+        default = "extension";
+        description = "Method to sort buffers by. Must be one of the supported valuees, or an inline Lua value.";
+      };
+    };
   };
 }