ncmpcpp: add module

.github/CODEOWNERS

@@ -77,6 +77,9 @@
 
 /modules/programs/mpv.nix                             @tadeokondrak
 
+/modules/programs/ncmpcpp.nix                         @olmokramer
+/tests/modules/programs/ncmpcpp                       @olmokramer
+
 /modules/programs/ne.nix                              @cwyc
 /tests/modules/programs/ne                            @cwyc
 

modules/lib/maintainers.nix

@@ -35,4 +35,10 @@
       fingerprint = "D446 E58D 87A0 31C7 EC15  88D7 B461 2924 45C6 E696";
     }];
   };
+  olmokramer = {
+    name = "Olmo Kramer";
+    email = "[email protected]";
+    github = "olmokramer";
+    githubId = 3612514;
+  };
 }

modules/misc/news.nix

@@ -1642,6 +1642,13 @@ in
           A new module is available: 'programs.mcfly'
         '';
       }
+
+      {
+        time = "2020-08-26T18:47:12+00:00";
+        message = ''
+          A new module is available: 'programs.ncmpcpp'
+        '';
+      }
     ];
   };
 }

modules/modules.nix

@@ -90,6 +90,7 @@ let
     (loadModule ./programs/mercurial.nix { })
     (loadModule ./programs/mpv.nix { })
     (loadModule ./programs/msmtp.nix { })
+    (loadModule ./programs/ncmpcpp.nix { })
     (loadModule ./programs/ne.nix { })
     (loadModule ./programs/neomutt.nix { })
     (loadModule ./programs/neovim.nix { })

modules/programs/ncmpcpp.nix

@@ -0,0 +1,136 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (lib) types mkIf mkEnableOption mkOption;
+
+  cfg = config.programs.ncmpcpp;
+
+  mpdCfg = config.services.mpd;
+
+  renderSettings = settings:
+    lib.concatStringsSep "\n" (lib.mapAttrsToList renderSetting settings);
+
+  renderSetting = name: value: "${name}=${renderValue value}";
+
+  renderValue = option:
+    {
+      int = toString option;
+      bool = if option then "yes" else "no";
+      string = option;
+    }.${builtins.typeOf option};
+
+  renderBindings = bindings:
+    lib.concatStringsSep "\n" (map renderBinding bindings);
+
+  renderBinding = { key, command }:
+    lib.concatStringsSep "\n  "
+    ([ ''def_key "${key}"'' ] ++ maybeWrapList command);
+
+  maybeWrapList = xs: if lib.isList xs then xs else [ xs ];
+
+  valueType = with types; oneOf [ bool int str ];
+
+  bindingType = types.submodule ({ name, config, ... }: {
+    options = {
+      key = mkOption {
+        type = types.str;
+        description = "Key to bind.";
+        example = "j";
+      };
+
+      command = mkOption {
+        type = with types; either str (listOf str);
+        description = "Command or sequence of commands to be executed.";
+        example = "scroll_down";
+      };
+    };
+  });
+
+in {
+  meta.maintainers = with lib.maintainers; [ olmokramer ];
+
+  options.programs.ncmpcpp = {
+    enable =
+      mkEnableOption "ncmpcpp - An ncurses Music Player Daemon (MPD) client";
+
+    package = mkOption {
+      type = types.package;
+      default = pkgs.ncmpcpp;
+      defaultText = "pkgs.ncmpcpp";
+      description = "Package providing the <code>ncmpcpp</code> command.";
+      example = "pkgs.ncmpcpp.override { ... }";
+    };
+
+    mpdMusicDir = mkOption {
+      type = types.nullOr types.path;
+      default = if mpdCfg.enable then mpdCfg.musicDirectory else null;
+      defaultText = lib.literalExample ''
+        if config.services.mpd.enable then
+          config.services.mpd.musicDirectory
+        else
+          null
+      '';
+      description = ''
+        Value of the <code>mpd_music_dir</code> setting. The value of
+        services.mpd.musicDirectory is used as the default if
+        services.mpd.enable is <literal>true</literal>.
+      '';
+      example = "~/music";
+    };
+
+    settings = mkOption {
+      type = types.attrsOf valueType;
+      default = { };
+      description = ''
+        Attrset from name of a setting to its value. For available options
+        See
+        <citerefentry>
+          <refentrytitle>ncmpcpp</refentrytitle>
+          <manvolnum>1</manvolnum>
+        </citerefentry>
+      '';
+      example = lib.literalExample ''
+        {
+          ncmpcpp_directory = "~/.local/share/ncmpcpp";
+        }
+      '';
+    };
+
+    bindings = mkOption {
+      type = types.listOf bindingType;
+      default = [ ];
+      description = "List of keybindings.";
+      example = lib.literalExample ''
+        [
+          { key = "j"; command = "scroll_down"; }
+          { key = "k"; command = "scroll_up"; }
+          { key = "J"; command = [ "select_item" "scroll_down" ]; }
+          { key = "K"; command = [ "select_item" "scroll_up" ]; }
+        ]
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    warnings = mkIf (cfg.settings ? mpd_music_dir && cfg.mpdMusicDir != null) [
+      ("programs.ncmpcpp.settings.mpd_music_dir will be overridden by"
+        + " programs.ncmpcpp.mpdMusicDir.")
+    ];
+
+    home.packages = [ cfg.package ];
+
+    xdg.configFile = {
+      "ncmpcpp/config" = let
+        settings = cfg.settings // lib.optionalAttrs (cfg.mpdMusicDir != null) {
+          mpd_music_dir = toString cfg.mpdMusicDir;
+        };
+      in mkIf (lib.length (lib.attrValues settings) > 0) {
+        text = renderSettings settings + "\n";
+      };
+
+      "ncmpcpp/bindings" = mkIf (lib.length cfg.bindings > 0) {
+        text = renderBindings cfg.bindings + "\n";
+      };
+    };
+  };
+}

tests/default.nix

@@ -53,6 +53,7 @@ import nmt {
     ./modules/programs/lf
     ./modules/programs/lieer
     ./modules/programs/mbsync
+    ./modules/programs/ncmpcpp
     ./modules/programs/ne
     ./modules/programs/neomutt
     ./modules/programs/newsboat

tests/modules/programs/ncmpcpp/default.nix

@@ -0,0 +1,5 @@
+{
+  ncmpcpp-use-mpd-config = ./ncmpcpp-use-mpd-config.nix;
+  ncmpcpp-empty-settings = ./ncmpcpp-empty-settings.nix;
+  ncmpcpp-example-settings = ./ncmpcpp-example-settings.nix;
+}

tests/modules/programs/ncmpcpp/ncmpcpp-empty-settings.nix

@@ -0,0 +1,16 @@
+{ pkgs, ... }:
+
+{
+  config = {
+    programs.ncmpcpp.enable = true;
+
+    nixpkgs.overlays =
+      [ (self: super: { ncmpcpp = pkgs.writeScriptBin "dummy-ncmpcpp" ""; }) ];
+
+    nmt.script = ''
+      assertPathNotExists home-files/.config/ncmpcpp/config
+
+      assertPathNotExists home-files/.config/ncmpcpp/bindings
+    '';
+  };
+}

tests/modules/programs/ncmpcpp/ncmpcpp-example-settings-expected-bindings

@@ -0,0 +1,16 @@
+def_key "j"
+  scroll_down
+def_key "k"
+  scroll_up
+def_key "J"
+  select_item
+  scroll_down
+def_key "K"
+  select_item
+  scroll_up
+def_key "x"
+  delete_playlist_items
+def_key "x"
+  delete_browser_items
+def_key "x"
+  delete_stored_playlist

tests/modules/programs/ncmpcpp/ncmpcpp-example-settings-expected-config

@@ -0,0 +1,4 @@
+display_volume_level=no
+mpd_music_dir=/home/user/music
+playlist_disable_highlight_delay=0
+user_interface=alternative

tests/modules/programs/ncmpcpp/ncmpcpp-example-settings.nix

@@ -0,0 +1,60 @@
+{ pkgs, ... }:
+
+{
+  config = {
+    programs.ncmpcpp = {
+      enable = true;
+      mpdMusicDir = "/home/user/music";
+
+      settings = {
+        user_interface = "alternative";
+        display_volume_level = false;
+        playlist_disable_highlight_delay = 0;
+      };
+
+      bindings = [
+        {
+          key = "j";
+          command = "scroll_down";
+        }
+        {
+          key = "k";
+          command = "scroll_up";
+        }
+        {
+          key = "J";
+          command = [ "select_item" "scroll_down" ];
+        }
+        {
+          key = "K";
+          command = [ "select_item" "scroll_up" ];
+        }
+        {
+          key = "x";
+          command = "delete_playlist_items";
+        }
+        {
+          key = "x";
+          command = "delete_browser_items";
+        }
+        {
+          key = "x";
+          command = "delete_stored_playlist";
+        }
+      ];
+    };
+
+    nixpkgs.overlays =
+      [ (self: super: { ncmpcpp = pkgs.writeScriptBin "dummy-ncmpcpp" ""; }) ];
+
+    nmt.script = ''
+      assertFileContent \
+        home-files/.config/ncmpcpp/config \
+        ${./ncmpcpp-example-settings-expected-config}
+
+      assertFileContent \
+        home-files/.config/ncmpcpp/bindings \
+        ${./ncmpcpp-example-settings-expected-bindings}
+    '';
+  };
+}

tests/modules/programs/ncmpcpp/ncmpcpp-use-mpd-config-expected-config

@@ -0,0 +1 @@
+mpd_music_dir=/home/user/music

tests/modules/programs/ncmpcpp/ncmpcpp-use-mpd-config.nix

@@ -0,0 +1,25 @@
+{ pkgs, ... }:
+
+{
+  config = {
+    programs.ncmpcpp.enable = true;
+
+    services.mpd.enable = true;
+    services.mpd.musicDirectory = "/home/user/music";
+
+    nixpkgs.overlays = [
+      (self: super: {
+        ncmpcpp = pkgs.writeScriptBin "dummy-ncmpcpp" "";
+        mpd = pkgs.writeScriptBin "dummy-mpd" "";
+      })
+    ];
+
+    nmt.script = ''
+      assertFileContent \
+        home-files/.config/ncmpcpp/config \
+        ${./ncmpcpp-use-mpd-config-expected-config}
+
+      assertPathNotExists home-files/.config/ncmpcpp/bindings
+    '';
+  };
+}