ungoogled-chromium: 87.0.4280.141 -> 88.0.4324.104

Unfortunately this requires a crazy hack to support building with
Google's proprietary Widevine DRM technology as that requires fetching
the Google Chrome sources (see also 86ff1e45ce).
The hack is required because ungoogled-chromium doesn't always use tags
that correspond to a Google Chrome release.

pkgs/applications/networking/browsers/chromium/default.nix

@@ -55,14 +55,23 @@ let
   pkgSuffix = if channel == "dev" then "unstable" else
     (if channel == "ungoogled-chromium" then "stable" else channel);
   pkgName = "google-chrome-${pkgSuffix}";
-  chromeSrc = fetchurl {
-    urls = map (repo: "${repo}/${pkgName}/${pkgName}_${version}-1_amd64.deb") [
-      "https://dl.google.com/linux/chrome/deb/pool/main/g"
-      "http://95.31.35.30/chrome/pool/main/g"
-      "http://mirror.pcbeta.com/google/chrome/deb/pool/main/g"
-      "http://repo.fdzh.org/chrome/deb/pool/main/g"
-    ];
-    sha256 = chromium.upstream-info.sha256bin64;
+  chromeSrc =
+    let
+      # Use the latest stable Chrome version if necessary:
+      version = if chromium.upstream-info.sha256bin64 != null
+        then chromium.upstream-info.version
+        else (lib.importJSON ./upstream-info.json).stable.version;
+      sha256 = if chromium.upstream-info.sha256bin64 != null
+        then chromium.upstream-info.sha256bin64
+        else (lib.importJSON ./upstream-info.json).stable.sha256bin64;
+    in fetchurl {
+      urls = map (repo: "${repo}/${pkgName}/${pkgName}_${version}-1_amd64.deb") [
+        "https://dl.google.com/linux/chrome/deb/pool/main/g"
+        "http://95.31.35.30/chrome/pool/main/g"
+        "http://mirror.pcbeta.com/google/chrome/deb/pool/main/g"
+        "http://repo.fdzh.org/chrome/deb/pool/main/g"
+      ];
+      inherit sha256;
   };
 
   mkrpath = p: "${lib.makeSearchPathOutput "lib" "lib64" p}:${lib.makeLibraryPath p}";

pkgs/applications/networking/browsers/chromium/update.py

@@ -166,9 +166,18 @@ with urlopen(HISTORY_URL) as resp:
                 f'{DEB_URL}/google-chrome-{google_chrome_suffix}/' +
                 f'google-chrome-{google_chrome_suffix}_{build["version"]}-1_amd64.deb')
         except subprocess.CalledProcessError:
-            # This build isn't actually available yet.  Continue to
-            # the next one.
-            continue
+            if (channel_name == 'ungoogled-chromium' and 'sha256' in channel and
+                    build['version'].split('.')[0] == last_channels['stable']['version'].split('.')[0]):
+                # Sometimes ungoogled-chromium is updated to a newer tag than
+                # the latest stable Chromium version. In this case we'll set
+                # sha256bin64 to null and the Nixpkgs code will fall back to
+                # the latest stable Google Chrome (only required for
+                # Widevine/DRM which is disabled by default):
+                channel['sha256bin64'] = None
+            else:
+                # This build isn't actually available yet.  Continue to
+                # the next one.
+                continue
 
         channel['deps'] = get_channel_dependencies(channel['version'])
         if channel_name == 'stable':

pkgs/applications/networking/browsers/chromium/upstream-info.json

@@ -44,19 +44,19 @@
     }
   },
   "ungoogled-chromium": {
-    "version": "87.0.4280.141",
-    "sha256": "0x9k809m36pfirnw2vnr9pk93nxdbgrvna0xf1rs3q91zkbr2x8l",
-    "sha256bin64": "0wq3yi0qyxzcid390w5rh4xjq92fjajvlifjl70g6sqnbk6vgvdp",
+    "version": "88.0.4324.104",
+    "sha256": "0iq1rmfiqmxsj6skbi17g007zqgjsb50b59slfni2n4mz06xmgbx",
+    "sha256bin64": null,
     "deps": {
       "gn": {
-        "version": "2020-09-09",
+        "version": "2020-11-05",
         "url": "https://gn.googlesource.com/gn",
-        "rev": "e002e68a48d1c82648eadde2f6aafa20d08c36f2",
-        "sha256": "0x4c7amxwzxs39grqs3dnnz0531mpf1p75niq7zhinyfqm86i4dk"
+        "rev": "53d92014bf94c3893886470a1c7c1289f8818db0",
+        "sha256": "1xcm07qjk6m2czi150fiqqxql067i832adck6zxrishm70c9jbr9"
       },
       "ungoogled-patches": {
-        "rev": "87.0.4280.141-1",
-        "sha256": "0r09d27jrdz01rcwifchbq7ksh2bac15h8svq18jx426mr56dzla"
+        "rev": "88.0.4324.104-1",
+        "sha256": "09x6kxd99a274mln3k3ckly6swyp5qdnkkp8p6grs9nr5jrgqqx5"
       }
     }
   }