piston-cli: add module (#2052)

* piston-cli: add module

* News: Remove trailing whitespace

.github/CODEOWNERS

@@ -148,6 +148,8 @@
 
 /modules/programs/pidgin.nix                          @rycee
 
+/modules/programs/piston-cli.nix                      @ethancedwards8
+
 /modules/programs/powerline-go.nix                    @DamienCassou
 
 /modules/programs/rbw.nix                             @ambroisie

modules/misc/news.nix

@@ -2054,6 +2054,13 @@ in
           A new module is available: 'programs.rbw'.
         '';
       }
+
+      {
+        time = "2021-05-30T15:22:10+00:00";
+        message = ''
+          A new module is available: 'programs.piston-cli'.
+        '';
+      }
     ];
   };
 }

modules/modules.nix

@@ -118,6 +118,7 @@ let
     (loadModule ./programs/pazi.nix { })
     (loadModule ./programs/pet.nix { })
     (loadModule ./programs/pidgin.nix { })
+    (loadModule ./programs/piston-cli.nix { })
     (loadModule ./programs/powerline-go.nix { })
     (loadModule ./programs/qutebrowser.nix { })
     (loadModule ./programs/rbw.nix { })

modules/programs/piston-cli.nix

@@ -0,0 +1,46 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.programs.piston-cli;
+  yamlFormat = pkgs.formats.yaml { };
+in {
+  meta.maintainers = with maintainers; [ ethancedwards8 ];
+
+  options.programs.piston-cli = {
+    enable = mkEnableOption "piston-cli, code runner";
+
+    package = mkOption {
+      type = types.package;
+      default = pkgs.piston-cli;
+      defaultText = literalExample "pkgs.piston-cli";
+      description = "The piston-cli package to use.";
+    };
+
+    settings = mkOption {
+      type = yamlFormat.type;
+      default = { };
+      example = literalExample ''
+        {
+          theme = "emacs";
+          box_style = "MINIMAL_DOUBLE_HEAD";
+          prompt_continuation = "...";
+          prompt_start = ">>>";
+        }
+      '';
+      description = ''
+        Configuration written to
+        <filename>$XDG_CONFIG_HOME/piston-cli/config.yml</filename>.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    home.packages = [ cfg.package ];
+
+    xdg.configFile."piston-cli/config.yml" = mkIf (cfg.settings != { }) {
+      source = yamlFormat.generate "config.yml" cfg.settings;
+    };
+  };
+}