From 844f7d214b338b1d8ebc5b9bd0507117924e7d08 Mon Sep 17 00:00:00 2001
From: Filippo Berto <berto.f@protonmail.com>
Date: Wed, 27 Oct 2021 11:33:47 +0200
Subject: [PATCH] Better kakoune mapping

---
 modules/kakoune.nix | 690 ++++++++++++++++++++++++++------------------
 1 file changed, 406 insertions(+), 284 deletions(-)

diff --git a/modules/kakoune.nix b/modules/kakoune.nix
index 4c22697..d0ccf96 100644
--- a/modules/kakoune.nix
+++ b/modules/kakoune.nix
@@ -1,90 +1,101 @@
 { config, lib, pkgs, ... }:
 let
-  strPalette = with pkgs.rice; palette.toRgbShortHex colorPalette;
-  packages = with pkgs; [
-    (makeDesktopItem
-      {
-        name = "kakoune";
-        type = "Application";
-        exec = "kak %U";
-        icon = "kakoune";
-        desktopName = "Kakoune";
-        comment = "Kakoune text editor";
-        terminal = true;
-        categories = "Development;Office;";
-        mimeType = "text/plain;text/*";
-      })
-  ] ++ [
-    # editorconfig-core-c
-    python3.pkgs.editorconfig
-  ] ++ (
-    lib.optionals (pkgs.devEnvironment.enableCpp) [
-      clang-tools
-    ]
-  ) ++ (
-    lib.optionals (pkgs.devEnvironment.enableData) [
-      yaml-language-server
-      nodePackages.vscode-langservers-extracted
-    ]
-  ) ++ (
-    lib.optionals (pkgs.devEnvironment.enableHtml) [
-      nodePackages.vscode-langservers-extracted
-    ]
-  ) ++ (
-    lib.optionals (pkgs.devEnvironment.enableJavascript) [
-      flow
-    ]
-  ) ++ (
-    lib.optionals (pkgs.devEnvironment.enableLatex) [
-      texlab
-    ]
-  ) ++ (
-    lib.optionals (pkgs.devEnvironment.enableNix) [
-      rnix-lsp
-    ]
-  ) ++ (
-    with python3.pkgs; lib.optionals (pkgs.devEnvironment.enablePython) [
-      black
-      # pyls-black
-      pyls-flake8
-      pyls-isort
-      # pyls-mypy
-      python-lsp-server
-    ]
-  ) ++ (
-    lib.optionals (pkgs.devEnvironment.enableRust) [
-      cargo
-      cargo-watch
-      clippy
-      rust-analyzer
-      rustc
-      rustfmt
-    ]
-  ) ++ (
-    lib.optionals (pkgs.devEnvironment.enableShell) [
-      nodePackages.bash-language-server
-    ]
-  ) ++ (
-    lib.optionals (pkgs.devEnvironment.enableSpelling) [
-      aspell
-      aspellDicts.en
-      aspellDicts.en-computers
-      aspellDicts.en-science
-      aspellDicts.it
-    ]
-  );
-  plugins = with pkgs; [
-    kakounePlugins.prelude-kak
-    kakounePlugins.kak-lsp
-    kakounePlugins.auto-pairs-kak
-    kakounePlugins.powerline-kak
-    kakounePlugins.connect-kak
-  ];
+  strPalette = with pkgs.rice;
+    palette.toRgbShortHex colorPalette;
+  packages = with pkgs;
+    [
+      (makeDesktopItem
+        {
+          name = "kakoune";
+          type = "Application";
+          exec = "kak %U";
+          icon = "kakoune";
+          desktopName = "Kakoune";
+          comment = "Kakoune text editor";
+          terminal = true;
+          categories = "Development;Office;";
+          mimeType = "text/plain;text/*";
+        })
+    ] ++ [
+      # editorconfig-core-c
+      python3.pkgs.editorconfig
+    ] ++ (
+      lib.optionals (pkgs.devEnvironment.enableCpp) [
+        clang-tools
+      ]
+    ) ++ (
+      lib.optionals (pkgs.devEnvironment.enableData) [
+        yaml-language-server
+        nodePackages.vscode-langservers-extracted
+      ]
+    ) ++ (
+      lib.optionals (pkgs.devEnvironment.enableHtml) [
+        nodePackages.vscode-langservers-extracted
+      ]
+    ) ++ (
+      lib.optionals (pkgs.devEnvironment.enableJavascript) [
+        flow
+      ]
+    ) ++ (
+      lib.optionals (pkgs.devEnvironment.enableLatex) [
+        texlab
+      ]
+    ) ++ (
+      lib.optionals (pkgs.devEnvironment.enableNix) [
+        rnix-lsp
+      ]
+    ) ++ (
+      with python3.pkgs;
+      lib.optionals (pkgs.devEnvironment.enablePython) [
+        black
+        # pyls-black
+        pyls-flake8
+        pyls-isort
+        # pyls-mypy
+        python-lsp-server
+      ]
+    ) ++ (
+      lib.optionals (pkgs.devEnvironment.enableRust) [
+        cargo
+        cargo-watch
+        clippy
+        rust-analyzer
+        rustc
+        rustfmt
+      ]
+    ) ++ (
+      lib.optionals (pkgs.devEnvironment.enableShell) [
+        nodePackages.bash-language-server
+      ]
+    ) ++ (
+      lib.optionals (pkgs.devEnvironment.enableSpelling) [
+        aspell
+        aspellDicts.en
+        aspellDicts.en-computers
+        aspellDicts.en-science
+        aspellDicts.it
+      ]
+    );
+  plugins = with pkgs;
+    [
+      kakounePlugins.prelude-kak
+      kakounePlugins.kak-lsp
+      kakounePlugins.auto-pairs-kak
+      kakounePlugins.powerline-kak
+      kakounePlugins.connect-kak
+    ];
 in
 {
-  home.sessionVariables = { EDITOR = "kak"; VISUAL = "kak"; };
-  programs.bash.shellAliases = { k = "kak"; };
-  programs.zsh.shellAliases = { k = "kak"; };
+  home.sessionVariables = {
+    EDITOR = "kak";
+    VISUAL = "kak";
+  };
+  programs.bash.shellAliases = {
+    k = "kak";
+  };
+  programs.zsh.shellAliases = {
+    k = "kak";
+  };
   home.packages = packages;
   programs.kakoune = {
     enable = true;
@@ -110,46 +121,155 @@ in
         enable = true;
         highlightCursor = true;
       };
-      keyMappings = with pkgs; [
-        { mode = "normal"; docstring = "Edit file"; key = "<c-e>"; effect = ":edit<space>"; }
-        { mode = "user"; docstring = "Code actions"; key = "a"; effect = ":lsp-code-actions<ret>"; }
-        { mode = "user"; docstring = "Comment block"; key = "b"; effect = ":comment-block<ret>"; }
-        { mode = "user"; docstring = "Comment line"; key = "l"; effect = ":comment-line<ret>"; }
-        { mode = "user"; docstring = "Copy to clipboard"; key = "y"; effect = "<a-|>${xclip}/bin/xclip -i -selection clipboard<ret>"; }
-        { mode = "user"; docstring = "Format code with formatter"; key = "f"; effect = ":format<ret>"; }
-        { mode = "user"; docstring = "Format code with LSP"; key = "F"; effect = ":lsp-formatting-sync<ret>"; }
-        { mode = "user"; docstring = "Jump to definition"; key = "d"; effect = ":lsp-definition<ret>"; }
-        { mode = "user"; docstring = "Jump to type definition"; key = "t"; effect = ":lsp-type-definition<ret>"; }
-        { mode = "user"; docstring = "List project diagnostics"; key = "i"; effect = ":lsp-diagnostics<ret>"; }
-        { mode = "user"; docstring = "Paste from clipboard (after)"; key = "P"; effect = "<a-!>${xclip}/bin/xclip -selection clipboard -o<ret>"; }
-        { mode = "user"; docstring = "Paste from clipboard (before)"; key = "p"; effect = "!${xclip}/bin/xclip -selection clipboard -o<ret>"; }
-        { mode = "user"; docstring = "Show hover info"; key = "q"; effect = ":lsp-hover<ret>"; }
-        { mode = "user"; docstring = "Spellcheck English"; key = "S"; effect = ":spell en<ret>"; }
-        { mode = "user"; docstring = "Spellcheck"; key = "s"; effect = ":spell "; }
-        { mode = "normal"; docstring = "Try next snippet placeholder"; key = "<c-n>"; effect = "<a-;>: insert-c-n<ret>"; }
-        { mode = "normal"; docstring = "Search"; key = "/"; effect = "/(?i)"; }
-        { mode = "normal"; docstring = "Reverse search"; key = "<a-/>"; effect = "<a-/>(?i)"; }
-      ];
-      hooks = with pkgs; [
-        { name = "BufCreate"; option = ".*"; commands = "editorconfig-load"; }
-        # { name = "ModuleLoaded"; option = "auto-pairs"; commands = "auto-pairs-enable"; }
-        { name = "ModuleLoaded"; option = "powerline"; commands = builtins.concatStringsSep "\n" [ "powerline-enable" ]; }
-        # { name = "WinSetOption"; option = "filetype=(rust|python|c|cpp|latex|javascript|go|nix)"; commands = builtins.concatStringsSep "\n" [ "lsp-enable-window" ]; }
-      ] ++ (
-        lib.optionals (pkgs.devEnvironment.enableLatex) [
-          { name = "BufSetOption"; option = "filetype=latex"; commands = "set-option buffer formatcmd ${texlive.bin.latexindent}/bin/latexindent"; }
-
-        ]
-      ) ++ (
-        lib.optionals (pkgs.devEnvironment.enableData) [
-          { name = "BufSetOption"; option = "filetype=(markdown|html|json|yaml|css|scss|less)"; commands = "set-option buffer formatcmd ${nodePackages.prettier}/bin/prettier"; }
-        ]
-      );
+      keyMappings = with pkgs;
+        [
+          {
+            mode = "normal";
+            docstring = "Edit file";
+            key = "<c-e>";
+            effect = ":edit<space>";
+          }
+          {
+            mode = "user";
+            docstring = "Code actions";
+            key = "a";
+            effect = ":lsp-code-actions<ret>";
+          }
+          {
+            mode = "user";
+            docstring = "Comment block";
+            key = "b";
+            effect = ":comment-block<ret>";
+          }
+          {
+            mode = "user";
+            docstring = "Comment line";
+            key = "l";
+            effect = ":comment-line<ret>";
+          }
+          {
+            mode = "user";
+            docstring = "Copy to clipboard";
+            key = "y";
+            effect = "<a-|>${xclip}/bin/xclip -i -selection clipboard<ret>";
+          }
+          {
+            mode = "user";
+            docstring = "Format code with formatter";
+            key = "f";
+            effect = ":format<ret>";
+          }
+          {
+            mode = "user";
+            docstring = "Format code with LSP";
+            key = "F";
+            effect = ":lsp-formatting-sync<ret>";
+          }
+          {
+            mode = "user";
+            docstring = "Jump to definition";
+            key = "d";
+            effect = ":lsp-definition<ret>";
+          }
+          {
+            mode = "user";
+            docstring = "Jump to type definition";
+            key = "t";
+            effect = ":lsp-type-definition<ret>";
+          }
+          {
+            mode = "user";
+            docstring = "List project diagnostics";
+            key = "i";
+            effect = ":lsp-diagnostics<ret>";
+          }
+          {
+            mode = "user";
+            docstring = "Paste from clipboard (after)";
+            key = "P";
+            effect = "<a-!>${xclip}/bin/xclip -selection clipboard -o<ret>";
+          }
+          {
+            mode = "user";
+            docstring = "Paste from clipboard (before)";
+            key = "p";
+            effect = "!${xclip}/bin/xclip -selection clipboard -o<ret>";
+          }
+          {
+            mode = "user";
+            docstring = "Show hover info";
+            key = "q";
+            effect = ":lsp-hover<ret>";
+          }
+          {
+            mode = "user";
+            docstring = "Spellcheck English";
+            key = "S";
+            effect = ":spell en<ret>";
+          }
+          {
+            mode = "user";
+            docstring = "Spellcheck";
+            key = "s";
+            effect = ":spell ";
+          }
+          {
+            mode = "normal";
+            docstring = "Try next snippet placeholder";
+            key = "<c-n>";
+            effect = "<a-;>: insert-c-n<ret>";
+          }
+          {
+            mode = "normal";
+            docstring = "Search";
+            key = "/";
+            effect = "/(?i)";
+          }
+          {
+            mode = "normal";
+            docstring = "Reverse search";
+            key = "<a-/>";
+            effect = "<a-/>(?i)";
+          }
+        ];
+      hooks = with pkgs;
+        [
+          {
+            name = "BufCreate";
+            option = ".*";
+            commands = "editorconfig-load";
+          }
+          # {
+          #   name = "ModuleLoaded";
+          #   option = "auto-pairs";
+          #   commands = "auto-pairs-enable";
+          # }
+          {
+            name = "ModuleLoaded";
+            option = "powerline";
+            commands = builtins.concatStringsSep "\n" [ "powerline-enable" ];
+          }
+        ] ++ (
+          lib.optionals (pkgs.devEnvironment.enableLatex) [
+            {
+              name = "BufSetOption";
+              option = "filetype=latex";
+              commands = "set-option buffer formatcmd ${texlive.bin.latexindent}/bin/latexindent";
+            }
+          ]
+        ) ++ (
+          lib.optionals (pkgs.devEnvironment.enableData) [
+            {
+              name = "BufSetOption";
+              option = "filetype=(markdown|html|json|yaml|css|scss|less)";
+              commands = "set-option buffer formatcmd ${nodePackages.prettier}/bin/prettier";
+            }
+          ]
+        );
       # TODO add more formatters from https://github.com/mawww/kakoune/wiki/Format
     };
     extraConfig = builtins.concatStringsSep "\n" [
       "# Custom commands"
-      "define-command -docstring 'save and quit' x 'write-all; quit' # Save and quit with 'x'"
       "add-highlighter global/ regex \\h+$ 0:Error                   # Highlight trailing spaces"
       "eval %sh{kak-lsp --kakoune -s $kak_session}"
       "lsp-enable"
@@ -170,169 +290,171 @@ in
     ];
     plugins = plugins;
   };
-  xdg.configFile."kak/colors/nord.kak".text = with strPalette; ''
-    set-face global value rgb:${normal.magenta},default
-    set-face global type rgb:${bright.white},default
-    set-face global identifier rgb:${normal.cyan},default
-    set-face global string rgb:${normal.green},default
-    set-face global error rgb:${normal.red},default
-    set-face global keyword rgb:${normal.blue},default
-    set-face global operator rgb:${normal.blue},default
-    set-face global attribute rgb:${bright.blue},default
-    set-face global comment rgb:${bright.blue},default
-    set-face global meta rgb:${normal.yellow},default
-    set-face global Default rgb:${normal.white},default
-    set-face global PrimarySelection rgb:${normal.black},rgb:${dark.yellow}
-    set-face global SecondarySelection rgb:${normal.black},rgb:${dark.white}
-    set-face global PrimaryCursor rgb:${normal.black},rgb:${normal.yellow}
-    set-face global SecondaryCursor rgb:${normal.black},rgb:${normal.white}
-    set-face global MenuForeground rgb:${normal.white},rgb:${bright.black}
-    set-face global MenuBackground default,rgb:${normal.black}
-    set-face global MenuInfo default,rgb:${normal.black}
-    set-face global Information rgb:${dark.black},rgb:${normal.cyan}
-    set-face global StatusLine rgb:${normal.white},rgb:${normal.black}
-    set-face global StatusLineMode rgb:${normal.blue},rgb:${normal.black}
-    set-face global StatusLineInfo rgb:${normal.blue},rgb:${normal.black}
-    set-face global StatusLineValue rgb:${normal.blue},rgb:${normal.black}
-    set-face global StatusCursor rgb:${dark.black},rgb:${normal.yellow}
-    set-face global Prompt rgb:${normal.cyan},rgb:${normal.black}
-    set-face global BufferPadding default,default
-  '';
-  xdg.configFile."kak-lsp/kak-lsp.toml".text = with pkgs; builtins.concatStringsSep "\n" (
-    [
-      ''
-        snippet_support = false
-        verbosity = 2
-        [server]
-        timeout = 1800 # seconds = 30 minutes
-      ''
-    ]
-    ++ (
-      lib.optional (pkgs.devEnvironment.enableCpp) ''
-        [language.c_cpp]
-        filetypes = ["c", "cpp"]
-        roots = ["compile_commands.json", ".clangd"]
-        command = "${clang-tools}/bin/clangd"
-        offset_encoding = "utf-8"
-      ''
-    ) ++ (
-      lib.optional (pkgs.devEnvironment.enableData) ''
-        [language.json]
-        filetypes = ["json"]
-        roots = ["package.json"]
-        command = "${nodePackages.vscode-langservers-extracted}/bin/vscode-json-language-server"
-        args = ["--stdio"]
-        [language.yaml]
-        filetypes = ["yaml"]
-        roots = [".git"]
-        command = "${yaml-language-server}/bin/yaml-language-server"
-        args = ["--stdio"]
-        [language.yaml.settings]
-        # See https://github.com/redhat-developer/yaml-language-server#language-server-settings
-        # Defaults are at https://github.com/redhat-developer/yaml-language-server/blob/master/src/yamlSettings.ts
-        yaml.format.enable = true
-      ''
-    ) ++ (
-      lib.optional (pkgs.devEnvironment.enableGo) ''
-        [language.go]
-        filetypes = ["go"]
-        roots = ["Gopkg.toml", "go.mod", ".git", ".hg"]
-        command = "gopls"
-        offset_encoding = "utf-8"
-        settings_section = "gopls"
-        [language.go.settings.gopls]
-        # See https://github.com/golang/tools/blob/master/gopls/doc/settings.md
-        # "build.buildFlags" = []
-      ''
-    )
-    ++ (
-      lib.optional (pkgs.devEnvironment.enableHtml) ''
-        [language.html]
-        filetypes = ["html"]
-        roots = ["package.json"]
-        command = "${nodePackages.vscode-langservers-extracted}/bin/vscode-html-language-server"
-        args = ["--stdio"]
-        [language.css]
-        filetypes = ["css"]
-        roots = ["package.json", ".git"]
-        command = "${nodePackages.vscode-langservers-extracted}/bin/vscode-css-language-server"
-        args = ["--stdio"]
-        [language.less]
-        filetypes = ["less"]
-        roots = ["package.json", ".git"]
-        command = "${nodePackages.vscode-langservers-extracted}/bin/vscode-css-language-server"
-        args = ["--stdio"]
-        [language.scss]
-        filetypes = ["scss"]
-        roots = ["package.json", ".git"]
-        command = "${nodePackages.vscode-langservers-extracted}/bin/vscode-css-language-server"
-        args = ["--stdio"]
-      ''
-    ) ++ (
-      lib.optional (pkgs.devEnvironment.enableJavascript) ''
-        [language.javascript]
-        filetypes = ["javascript"]
-        roots = [".flowconfig"]
-        command = "${flow}/bin/flow"
-        args = ["lsp"]
-      ''
-    ) ++ (
-      lib.optional (pkgs.devEnvironment.enableLatex) ''
-        [language.latex]
-        filetypes = ["latex"]
-        roots = [".git"]
-        command = "${texlab}/bin/texlab"
-        settings_section = "texlab"
-        [language.latex.settings.texlab]
-        # See https://github.com/latex-lsp/texlab/blob/master/src/options.rs
-        bibtexFormatter = "${texlab}/bin/texlab"
-      ''
-    ) ++ (
-      lib.optional (pkgs.devEnvironment.enableNix) ''
-        [language.nix]
-        filetypes = ["nix"]
-        roots = ["flake.nix", "shell.nix", ".git"]
-        command = "${rnix-lsp}/bin/rnix-lsp"
-      ''
-    ) ++ (
-      lib.optional (pkgs.devEnvironment.enablePython) ''
-        [language.python]
-        filetypes = ["python"]
-        roots = ["requirements.txt", "setup.py", ".git", ".hg"]
-        command = "${python3.pkgs.python-lsp-server}/bin/pylsp"
-        offset_encoding = "utf-8"
-        [language.python.settings]
-        # See https://github.com/palantir/python-language-server#configuration
-        # and https://github.com/palantir/python-language-server/blob/develop/vscode-client/package.json
-        # "pyls.configurationSources" = ["flake8"]
-      ''
-    ) ++ (
-      lib.optional (pkgs.devEnvironment.enableRust) ''
-        [language.rust]
-        filetypes = ["rust"]
-        roots = ["Cargo.toml"]
-        command = "${rust-analyzer}/bin/rust-analyzer"
-        settings_section = "rust-analyzer"
-        [language.rust.settings.rust-analyzer]
-        hoverActions.enable = false # kak-lsp doesn't support this at the moment
-        # cargo.features = []
-        # See https://rust-analyzer.github.io/manual.html#configuration
-        # If you get 'unresolved proc macro' warnings, you have two options
-        # 1. The safe choice is two disable the warning:
-        diagnostics.disabled = ["unresolved-proc-macro"]
-        # 2. Or you can opt-in for proc macro support
-        procMacro.enable = true
-        cargo.loadOutDirsFromCheck = true
-        # See https://github.com/rust-analyzer/rust-analyzer/issues/6448
-      ''
-    ) ++ (
-      lib.optional (pkgs.devEnvironment.enableShell) ''
-        [language.bash]
-        filetypes = ["sh"]
-        roots = [".git", ".hg"]
-        command = "${nodePackages.bash-language-server}/bin/bash-language-server"
-        args = ["start"]
-      ''
-    )
-  );
+  xdg.configFile."kak/colors/nord.kak".text = with strPalette;
+    ''
+      set-face global value rgb:${normal.magenta},default
+      set-face global type rgb:${bright.white},default
+      set-face global identifier rgb:${normal.cyan},default
+      set-face global string rgb:${normal.green},default
+      set-face global error rgb:${normal.red},default
+      set-face global keyword rgb:${normal.blue},default
+      set-face global operator rgb:${normal.blue},default
+      set-face global attribute rgb:${bright.blue},default
+      set-face global comment rgb:${bright.blue},default
+      set-face global meta rgb:${normal.yellow},default
+      set-face global Default rgb:${normal.white},default
+      set-face global PrimarySelection rgb:${normal.black},rgb:${dark.yellow}
+      set-face global SecondarySelection rgb:${normal.black},rgb:${dark.white}
+      set-face global PrimaryCursor rgb:${normal.black},rgb:${normal.yellow}
+      set-face global SecondaryCursor rgb:${normal.black},rgb:${normal.white}
+      set-face global MenuForeground rgb:${normal.white},rgb:${bright.black}
+      set-face global MenuBackground default,rgb:${normal.black}
+      set-face global MenuInfo default,rgb:${normal.black}
+      set-face global Information rgb:${dark.black},rgb:${normal.cyan}
+      set-face global StatusLine rgb:${normal.white},rgb:${normal.black}
+      set-face global StatusLineMode rgb:${normal.blue},rgb:${normal.black}
+      set-face global StatusLineInfo rgb:${normal.blue},rgb:${normal.black}
+      set-face global StatusLineValue rgb:${normal.blue},rgb:${normal.black}
+      set-face global StatusCursor rgb:${dark.black},rgb:${normal.yellow}
+      set-face global Prompt rgb:${normal.cyan},rgb:${normal.black}
+      set-face global BufferPadding default,default
+    '';
+  xdg.configFile."kak-lsp/kak-lsp.toml".text = with pkgs;
+    builtins.concatStringsSep "\n" (
+      [
+        ''
+          snippet_support = false
+          verbosity = 2
+          [server]
+          timeout = 1800 # seconds = 30 minutes
+        ''
+      ]
+      ++ (
+        lib.optional (pkgs.devEnvironment.enableCpp) ''
+          [language.c_cpp]
+          filetypes = ["c", "cpp"]
+          roots = ["compile_commands.json", ".clangd"]
+          command = "${clang-tools}/bin/clangd"
+          offset_encoding = "utf-8"
+        ''
+      ) ++ (
+        lib.optional (pkgs.devEnvironment.enableData) ''
+          [language.json]
+          filetypes = ["json"]
+          roots = ["package.json"]
+          command = "${nodePackages.vscode-langservers-extracted}/bin/vscode-json-language-server"
+          args = ["--stdio"]
+          [language.yaml]
+          filetypes = ["yaml"]
+          roots = [".git"]
+          command = "${yaml-language-server}/bin/yaml-language-server"
+          args = ["--stdio"]
+          [language.yaml.settings]
+          # See https://github.com/redhat-developer/yaml-language-server#language-server-settings
+          # Defaults are at https://github.com/redhat-developer/yaml-language-server/blob/master/src/yamlSettings.ts
+          yaml.format.enable = true
+        ''
+      ) ++ (
+        lib.optional (pkgs.devEnvironment.enableGo) ''
+          [language.go]
+          filetypes = ["go"]
+          roots = ["Gopkg.toml", "go.mod", ".git", ".hg"]
+          command = "gopls"
+          offset_encoding = "utf-8"
+          settings_section = "gopls"
+          [language.go.settings.gopls]
+          # See https://github.com/golang/tools/blob/master/gopls/doc/settings.md
+          # "build.buildFlags" = []
+        ''
+      )
+      ++ (
+        lib.optional (pkgs.devEnvironment.enableHtml) ''
+          [language.html]
+          filetypes = ["html"]
+          roots = ["package.json"]
+          command = "${nodePackages.vscode-langservers-extracted}/bin/vscode-html-language-server"
+          args = ["--stdio"]
+          [language.css]
+          filetypes = ["css"]
+          roots = ["package.json", ".git"]
+          command = "${nodePackages.vscode-langservers-extracted}/bin/vscode-css-language-server"
+          args = ["--stdio"]
+          [language.less]
+          filetypes = ["less"]
+          roots = ["package.json", ".git"]
+          command = "${nodePackages.vscode-langservers-extracted}/bin/vscode-css-language-server"
+          args = ["--stdio"]
+          [language.scss]
+          filetypes = ["scss"]
+          roots = ["package.json", ".git"]
+          command = "${nodePackages.vscode-langservers-extracted}/bin/vscode-css-language-server"
+          args = ["--stdio"]
+        ''
+      ) ++ (
+        lib.optional (pkgs.devEnvironment.enableJavascript) ''
+          [language.javascript]
+          filetypes = ["javascript"]
+          roots = [".flowconfig"]
+          command = "${flow}/bin/flow"
+          args = ["lsp"]
+        ''
+      ) ++ (
+        lib.optional (pkgs.devEnvironment.enableLatex) ''
+          [language.latex]
+          filetypes = ["latex"]
+          roots = [".git"]
+          command = "${texlab}/bin/texlab"
+          settings_section = "texlab"
+          [language.latex.settings.texlab]
+          # See https://github.com/latex-lsp/texlab/blob/master/src/options.rs
+          # bibtexFormatter = "${texlab}/bin/texlab"
+        ''
+      ) ++ (
+        lib.optional (pkgs.devEnvironment.enableNix) ''
+          [language.nix]
+          filetypes = ["nix"]
+          roots = ["flake.nix", "shell.nix", ".git"]
+          command = "${rnix-lsp}/bin/rnix-lsp"
+        ''
+      ) ++ (
+        lib.optional (pkgs.devEnvironment.enablePython) ''
+          [language.python]
+          filetypes = ["python"]
+          roots = ["requirements.txt", "setup.py", ".git", ".hg"]
+          command = "${python3.pkgs.python-lsp-server}/bin/pylsp"
+          offset_encoding = "utf-8"
+          [language.python.settings]
+          # See https://github.com/palantir/python-language-server#configuration
+          # and https://github.com/palantir/python-language-server/blob/develop/vscode-client/package.json
+          # "pyls.configurationSources" = ["flake8"]
+        ''
+      ) ++ (
+        lib.optional (pkgs.devEnvironment.enableRust) ''
+          [language.rust]
+          filetypes = ["rust"]
+          roots = ["Cargo.toml"]
+          command = "${rust-analyzer}/bin/rust-analyzer"
+          settings_section = "rust-analyzer"
+          [language.rust.settings.rust-analyzer]
+          hoverActions.enable = false # kak-lsp doesn't support this at the moment
+          # cargo.features = []
+          # See https://rust-analyzer.github.io/manual.html#configuration
+          # If you get 'unresolved proc macro' warnings, you have two options
+          # 1. The safe choice is two disable the warning:
+          diagnostics.disabled = ["unresolved-proc-macro"]
+          # 2. Or you can opt-in for proc macro support
+          procMacro.enable = true
+          cargo.loadOutDirsFromCheck = true
+          # See https://github.com/rust-analyzer/rust-analyzer/issues/6448
+        ''
+      ) ++ (
+        lib.optional (pkgs.devEnvironment.enableShell) ''
+          [language.bash]
+          filetypes = ["sh"]
+          roots = [".git", ".hg"]
+          command = "${nodePackages.bash-language-server}/bin/bash-language-server"
+          args = ["start"]
+        ''
+      )
+    );
 }