feat: added example to use pgp signing of emails, fixed browserpass

- Added example on how to enable pgp signing on gmail email accounts
- The programs.browserpass.enable option only used extension ids for the
  actual extensions not for the custom extension key we gave it. So we
are updaing the com.github.browserpass.native.json file to manually add
our own extension id to it

3 files changed, 137 insertions, 94 deletions

diff --git a/modules/web/chromium/browserpass.nix b/modules/web/chromium/browserpass.nix
index 860d46e..f09945d 100644
--- a/modules/web/chromium/browserpass.nix
+++ b/modules/web/chromium/browserpass.nix
@@ -1,13 +1,30 @@
 {
   lib,
   config,
+  pkgs,
   ...
 }:
+let
+  # Extension ID computed from the pinned "extensionKey" in
+  patchedHost =
+    pkgs.runCommand "com.github.browserpass.native.json"
+      {
+        nativeBuildInputs = [ pkgs.jq ];
+      }
+      ''
+        jq '.allowed_origins = ["chrome-extension://${config.web.chromium.extensions.browserpass.id}/"]' \
+          ${config.programs.browserpass.package}/lib/browserpass/hosts/chromium/com.github.browserpass.native.json \
+          > $out
+      '';
+in
 {
   config = lib.mkIf (config.web.chromium.enable && config.security.gopass.enable) {
     programs.browserpass = {
       enable = true;
       browsers = [ "chromium" ];
     };
+    home.file.".config/chromium/NativeMessagingHosts/com.github.browserpass.native.json" = lib.mkForce {
+      source = patchedHost;
+    };
   };
 }
diff --git a/modules/web/chromium/default.nix b/modules/web/chromium/default.nix
index 2cd9fc1..8a86a5a 100644
--- a/modules/web/chromium/default.nix
+++ b/modules/web/chromium/default.nix
@@ -7,7 +7,7 @@
 {
   imports = [
     ./browserpass.nix
-    ./extensions/assertions.nix
+    ./extensions
   ];
 
   options.web.chromium = {
@@ -29,93 +29,80 @@
     };
   };
 
-  config = lib.mkIf config.web.chromium.enable (
-    let
-      exts = import ./extensions {
-        inherit lib pkgs config;
-        checkForUpdates = config.web.chromium.checkForUpdates;
-      };
-
-      extensionDirs = [
-        exts.aria2Explorer.drv
-        exts.browserpass.drv
-        exts.darkMode.drv
-        exts.searxngHome.drv
-        exts.theme.drv
-        exts.ublockOrigin.drv
-      ];
-
-      pinnedIds = lib.filter (id: id != null) [
-        exts.browserpass.id
-        exts.darkMode.id
-        exts.ublockOrigin.id
-      ];
-    in
-    {
-      programs.chromium = {
-        enable = true;
-        package = pkgs.ungoogled-chromium;
-        commandLineArgs = [
+  config = lib.mkIf config.web.chromium.enable {
+    programs.chromium = {
+      enable = true;
+      package = pkgs.ungoogled-chromium;
+      commandLineArgs =
+        let
+          extensionDirs = lib.concatStringsSep "," (
+            lib.mapAttrsToList (_: ext: ext.drv) config.web.chromium.extensions
+          );
+        in
+        [
           "--force-device-scale-factor=1.15"
-          "--load-extension=${lib.concatStringsSep "," extensionDirs}"
+          "--load-extension=${extensionDirs}"
         ];
-      };
+    };
 
-      xdg.mimeApps.defaultApplications = {
-        "x-scheme-handler/http" = "chromium-browser.desktop";
-        "x-scheme-handler/https" = "chromium-browser.desktop";
-        "x-scheme-handler/chrome" = "chromium-browser.desktop";
-        "text/html" = "chromium-browser.desktop";
-        "application/xhtml+xml" = "chromium-browser.desktop";
-      };
+    xdg.mimeApps.defaultApplications = {
+      "x-scheme-handler/http" = "chromium-browser.desktop";
+      "x-scheme-handler/https" = "chromium-browser.desktop";
+      "x-scheme-handler/chrome" = "chromium-browser.desktop";
+      "text/html" = "chromium-browser.desktop";
+      "application/xhtml+xml" = "chromium-browser.desktop";
+    };
 
-      xdg.configFile."chromium/Default/Preferences" = {
-        force = true;
-        text = builtins.toJSON {
-          NewTabPage = {
-            FooterVisible = false;
-          };
-          bookmark_bar = {
-            show_on_all_tabs = false;
-          };
-          browser = {
-            show_full_urls = true;
-            theme = {
-              follows_system_colors = true;
-            };
-          };
-          search = {
-            suggest_enabled = false;
-          };
-          url_handling = {
-            show_full_urls = true;
-          };
-          autofill = {
-            profile_enabled = false;
-            credit_card_enabled = false;
-          };
-          vertical_tabs = {
-            collapsed_state = true;
-            enabled = true;
-            enabled_first_time = true;
-            uncollapsed_width = 240;
+    xdg.configFile."chromium/Default/Preferences" = {
+      force = true;
+      text = builtins.toJSON {
+        NewTabPage = {
+          FooterVisible = false;
+        };
+        bookmark_bar = {
+          show_on_all_tabs = false;
+        };
+        browser = {
+          show_full_urls = true;
+          theme = {
+            follows_system_colors = true;
           };
-          credentials_enable_service = false;
-          credentials_enable_autosignin = false;
-          extensions = {
-            pinned_extensions = pinnedIds;
-            ui = {
-              developer_mode = true;
-            };
+        };
+        search = {
+          suggest_enabled = false;
+        };
+        url_handling = {
+          show_full_urls = true;
+        };
+        autofill = {
+          profile_enabled = false;
+          credit_card_enabled = false;
+        };
+        vertical_tabs = {
+          collapsed_state = true;
+          enabled = true;
+          enabled_first_time = true;
+          uncollapsed_width = 240;
+        };
+        credentials_enable_service = false;
+        credentials_enable_autosignin = false;
+        extensions = {
+          pinned_extensions = [
+            config.web.chromium.extensions.browserpass.id
+            config.web.chromium.extensions.darkMode.id
+            config.web.chromium.extensions.ublockOrigin.id
+          ];
+          ui = {
+            developer_mode = true;
           };
-          profile = {
-            default_content_setting_values = {
-              notifications = 2;
-            };
+        };
+        profile = {
+          default_content_setting_values = {
+            notifications = 2;
           };
-          high_efficiency_mode_enabled = true;
         };
+        high_efficiency_mode_enabled = true;
       };
-    }
-  );
+    };
+  };
 }
diff --git a/modules/web/chromium/extensions/default.nix b/modules/web/chromium/extensions/default.nix
index a73f5f2..6128d2b 100644
--- a/modules/web/chromium/extensions/default.nix
+++ b/modules/web/chromium/extensions/default.nix
@@ -2,24 +2,63 @@
   lib,
   pkgs,
   config,
-  checkForUpdates ? true,
+  ...
 }:
 let
+  cfg = config.web.chromium;
+
   extLib = import ./lib.nix {
-    inherit
-      lib
-      pkgs
-      config
-      checkForUpdates
-      ;
+    inherit lib pkgs config;
+    checkForUpdates = cfg.checkForUpdates;
   };
+
   mkExtension = path: import path { inherit lib pkgs extLib; };
+
+  extensionSubmodule = lib.types.submodule {
+    options = {
+      pname = lib.mkOption {
+        type = lib.types.str;
+        description = "Package name of the extension.";
+      };
+      version = lib.mkOption {
+        type = lib.types.str;
+        description = "Resolved/pinned version of the extension.";
+      };
+      id = lib.mkOption {
+        type = lib.types.nullOr lib.types.str;
+        description = "Chrome extension ID, derived from the pinned key. Null if the extension isn't key-pinned.";
+      };
+      drv = lib.mkOption {
+        type = lib.types.package;
+        description = "Unpacked extension derivation.";
+      };
+    };
+  };
 in
 {
-  aria2Explorer = mkExtension ./aria2-explorer.nix;
-  browserpass = mkExtension ./browserpass.nix;
-  darkMode = mkExtension ./dark-mode.nix;
-  searxngHome = mkExtension ./searxng-home.nix;
-  theme = mkExtension ./theme.nix;
-  ublockOrigin = mkExtension ./ublock-origin.nix;
+  imports = [
+    ./assertions.nix
+  ];
+
+  options.web.chromium.extensions = lib.mkOption {
+    type = lib.types.attrsOf extensionSubmodule;
+    internal = true;
+    default = { };
+    description = ''
+      Resolved chromium extension derivations, keyed by name. Computed
+      internally from ./extensions/*.nix — not user-settable. Read from
+      other modules via e.g. `config.web.chromium.extensions.browserpass.id`.
+    '';
+  };
+
+  # readOnly options get their actual value assigned here, in this same
+  # module's config — this is the one place allowed to set it.
+  config.web.chromium.extensions = {
+    aria2Explorer = mkExtension ./aria2-explorer.nix;
+    browserpass = mkExtension ./browserpass.nix;
+    darkMode = mkExtension ./dark-mode.nix;
+    searxngHome = mkExtension ./searxng-home.nix;
+    theme = mkExtension ./theme.nix;
+    ublockOrigin = mkExtension ./ublock-origin.nix;
+  };
 }