devenv: add more modules

1 files changed, 53 insertions, 0 deletions

diff --git a/modules/devenv/integrations/emacs.nix b/modules/devenv/integrations/emacs.nix
new file mode 100644
index 0000000..b7f1e42
--- /dev/null
+++ b/modules/devenv/integrations/emacs.nix
@@ -0,0 +1,53 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  cfg = config.emacs;
+  attrs2alist = value:
+    if lib.isAttrs value
+    then "(${lib.concatStringsSep "\n" (lib.mapAttrsToList (name: value: "(${name} . ${attrs2alist value})") value)})"
+    else
+      (
+        if lib.isList value
+        then "(${lib.concatStringsSep " " value})"
+        else
+          (
+            if lib.isBool value
+            then
+              (
+                if value
+                then "t"
+                else "nil"
+              )
+            else builtins.toString value
+          )
+      );
+in {
+  options.emacs = {
+    enable = lib.mkEnableOption "emacs integration";
+    dirLocals = lib.mkOption {
+      type = with lib.types; attrsOf (attrsOf str);
+      default = {};
+      example =
+        # the first example from https://www.gnu.org/software/emacs/manual/html_node/emacs/Directory-Variables.html
+        {
+          nil = {
+            indent-tabs-mode = true;
+            fill-column = 80;
+            mode = "auto-fill";
+          };
+          c-mode = {
+            c-file-style = ''"BSD"'';
+            subdirs = "nil";
+          };
+          "\"src/imported\"".nil.change-log-default-name = ''"ChangeLog.local"'';
+        };
+    };
+  };
+
+  config.dotfiles.".dir-locals.el" = lib.mkIf (cfg.dirLocals != {}) {
+    gitignore = lib.mkDefault true;
+    text = attrs2alist cfg.dirLocals;
+  };
+}