nixos-blueprint/modules/home/programs/editor/helix.nix

{
  pkgs,
  config,
  lib,
  ...
}: let
  inherit (lib) mkIf mkEnableOption getExe;
  cfg = config.editor.helix;
in {
  options = {
    editor.helix.enable =
      mkEnableOption "enable helix editor";
  };
  config = mkIf cfg.enable {
    programs.helix = {
      enable = true; # vim-like editor in rust
      defaultEditor = true;
      settings = {
        editor = {
          bufferline = "multiple";
          cursorline = true;
          inline-diagnostics.cursor-line = "warning";
          line-number = "relative";
          lsp = {
            display-messages = true;
            display-inlay-hints = true;
          };
          cursor-shape = {
            insert = "bar";
            normal = "block";
            select = "underline";
          };
          statusline = {
            left = ["mode" "spinner" "version-control"];
            center = ["file-name"];
            right = ["diagnostics" "selections" "position" "file-encoding" "file-line-ending" "file-type"];
            separator = "|";
          };
          soft-wrap = {
            enable = true;
            max-wrap = 25;
            max-indent-retain = 0;
            wrap-indicator = "";
          };
        };
        keys = {
          insert.C-c = "normal_mode";
          normal = {
            esc = ["collapse_selection" "keep_primary_selection"];
            space = {
              space = "file_picker";
              w = ":w";
              q = ":q";
              x = ":x";
              n = ":n";
              "," = "goto_previous_buffer";
              "." = "goto_next_buffer";
              l = ":reflow";
            };
          };
        };
      };
      languages = {
        language-server = {
          # markdown-oxide.command = getExe pkgs.markdown-oxide;
          # nixd.command = getExe pkgs.nixd;
          # pyright = {
          #   command = getExe pkgs.pyright;
          #   args = ["-"];
          # };
          # rust-analyzer.command = getExe pkgs.rust-analyzer;
          # texlab.command = getExe pkgs.texlab;
          bash-language-server = {
            command = getExe pkgs.bash-language-server;
            environment = {
              "SHELLCHECK_PATH" = getExe pkgs.shellcheck;
              "SHFMT_PATH" = getExe pkgs.shfmt;
            };
          };
          clangd.command = "${pkgs.clang-tools}/bin/clangd";
          fsac = {
            command = getExe pkgs.fsautocomplete;
            config = {
              # editor.formatOnSave = true;
              AutomaticWorkspaceInit = true;
              FSharp.ExternalAutocomplete = true;
              FSharp.linting.fsharplint.enabled = true;
              FSharp.linting.fsharplint.configFile = "fsharplint.json";
              FSharp.formatting.fantomas.enabled = true;
            };
          };
          nil = {
            command = getExe pkgs.nil;
            config = {
              formatting.command = [(getExe pkgs.alejandra)];
            };
          };
          ruff = {
            command = getExe pkgs.ruff;
            args = ["server"];
          };
          tinymist.command = getExe pkgs.tinymist;
          vscode-json-language-server.command = getExe pkgs.nodePackages.vscode-json-languageserver;
          yaml-language-server.command = getExe pkgs.yaml-language-server;
          zk = {
            command = getExe pkgs.zk;
            args = ["lsp"];
          };
        };
        language = [
          {
            name = "nix";
            auto-format = true;
            language-servers = ["nil"];
          }
          {
            name = "typst";
            auto-format = true;
            formatter.command = getExe pkgs.typstyle;
            language-servers = ["tinymist"];
          }
          {
            name = "markdown";
            # auto-format = true;
            language-servers = ["zk" "markdown-oxide"];
          }
          {
            name = "c";
            auto-format = true;
            # formatter.command = "${pkgs.clang-tools}/bin/clang-format";
          }
          {
            name = "cpp";
            auto-format = true;
            # formatter.command = "${pkgs.clang-tools}/bin/clang-format";
          }
          {
            name = "fsharp";
            auto-format = true;
            language-servers = ["fsac"];
            scope = "source.fs";
            roots = ["fsproj" "sln" ".git"];
          }
          # {
          #   name = "rust";
          #   auto-format = true;
          #   language-servers = ["rust-analyzer"];
          #   formatter.command = getExe pkgs.rustfmt;
          # }
          {
            name = "json";
            auto-format = true;
            formatter.command = getExe pkgs.jq;
            language-servers = ["vscode-json-language-server"];
          }
          {
            name = "yaml";
            auto-format = true;
            formatter.command = getExe pkgs.yamlfmt;
            formatter.args = ["-"];
            language-servers = ["yaml-language-server"];
          }
          {
            name = "bash";
            auto-format = true;
            # formatter.command = getExe pkgs.shfmt;
            # formatter.args = ["-"];
          }
          {
            name = "python";
            auto-format = true;
            language-servers = [
              {
                name = "ruff";
                # only-features = ["format" "diagnostics"];
              }
              # {
              # name = "pyright";
              # except-features = ["format" "diagnostics"];
              # }
            ];
          }
        ];
      };
    };
  };
}