keychain: add module

modules/modules.nix

@@ -57,6 +57,7 @@ let
     (loadModule ./programs/info.nix { })
     (loadModule ./programs/irssi.nix { })
     (loadModule ./programs/jq.nix { })
+    (loadModule ./programs/keychain.nix { })
     (loadModule ./programs/lesspipe.nix { })
     (loadModule ./programs/man.nix { })
     (loadModule ./programs/matplotlib.nix { })

modules/programs/keychain.nix

@@ -0,0 +1,88 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.programs.keychain;
+
+  flags = cfg.extraFlags
+    ++ optional (cfg.agents != []) "--agents ${concatStringsSep "," cfg.agents}"
+    ++ optional (cfg.inheritType != null) "--inherit ${cfg.inheritType}";
+
+  shellCommand = ''
+    eval "$(${cfg.package}/bin/keychain --eval ${concatStringsSep " " flags} ${concatStringsSep " " cfg.keys})"
+  '';
+
+in
+
+{
+  meta.maintainers = [ maintainers.marsam ];
+
+  options.programs.keychain = {
+    enable = mkEnableOption "keychain";
+
+    package = mkOption {
+      type = types.package;
+      default = pkgs.keychain;
+      defaultText = "pkgs.keychain";
+      description = ''
+        Keychain package to install.
+      '';
+    };
+
+    keys = mkOption {
+      type = types.listOf types.str;
+      default = [ "id_rsa" ];
+      description = ''
+        Keys to add to keychain.
+      '';
+    };
+
+    agents = mkOption {
+      type = types.listOf types.str;
+      default = [];
+      description = ''
+        Agents to add.
+      '';
+    };
+
+    inheritType = mkOption {
+      type = types.nullOr (types.enum ["local" "any" "local-once" "any-once"]);
+      default = null;
+      description = ''
+        Inherit type to attempt from agent variables from the environment.
+      '';
+    };
+
+    extraFlags = mkOption {
+      type = types.listOf types.str;
+      default = [ "--quiet" ];
+      description = ''
+        Extra flags to pass to keychain.
+      '';
+    };
+
+    enableBashIntegration = mkOption {
+      default = true;
+      type = types.bool;
+      description = ''
+        Whether to enable Bash integration.
+      '';
+    };
+
+    enableZshIntegration = mkOption {
+      default = true;
+      type = types.bool;
+      description = ''
+        Whether to enable Zsh integration.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    home.packages = [ cfg.package ];
+    programs.bash.initExtra = mkIf cfg.enableBashIntegration shellCommand;
+    programs.zsh.initExtra = mkIf cfg.enableZshIntegration shellCommand;
+  };
+}