third_party/python/pygobject/init.patch

commit fe03a5f1aa619f4c1208ca1dce7d98db513dbec8
Author: Philipp Schrader <philipp.schrader@gmail.com>
Date:   Thu Oct 27 20:28:03 2022 -0700

    Make pygobject hermetic

diff --git a/site-packages/gi/__init__.py b/site-packages/gi/__init__.py
index 3454790..a6f3246 100644
--- a/site-packages/gi/__init__.py
+++ b/site-packages/gi/__init__.py
@@ -27,6 +27,49 @@ import os
 import importlib
 import types
 
+from bazel_tools.tools.python.runfiles import runfiles
+
+def _hermeticity_fixup():
+    _runfiles = runfiles.Create()
+    runfiles_dir = _runfiles.EnvVars()["RUNFILES_DIR"]
+    if not runfiles_dir:
+        raise FileNotFoundError("Failed runfiles lookup.")
+
+    gtk_runtime_dir = os.path.join(runfiles_dir, "gtk_runtime")
+
+    ld_library_path = os.getenv("LD_LIBRARY_PATH") or ""
+    if ld_library_path:
+        ld_library_path = ":" + ld_library_path
+
+    os.environ["LD_LIBRARY_PATH"] = ":".join([
+        gtk_runtime_dir + "/lib/x86_64-linux-gnu",
+        gtk_runtime_dir + "/usr/lib/x86_64-linux-gnu",
+    ]) + ld_library_path
+
+    os.environ["GI_GIR_PATH"] = os.path.join(gtk_runtime_dir, "usr", "share", "gir-1.0")
+    os.environ["GI_TYPELIB_PATH"] = os.path.join(gtk_runtime_dir, "usr", "lib",
+                                                 "x86_64-linux-gnu",
+                                                 "girepository-1.0")
+
+    os.environ["GIO_EXTRA_MODULES"] = os.path.join(gtk_runtime_dir, "usr", "lib", "x86_64-linux-gnu", "gio", "modules")
+
+    # Tell fontconfig where to find the sandboxed font files.
+    os.environ["FONTCONFIG_PATH"] = os.path.join(gtk_runtime_dir, "etc/fonts/")
+    os.environ["FONTCONFIG_FILE"] = os.path.join(gtk_runtime_dir, "etc/fonts/fonts.conf")
+    # The sysroot here needs to be "/". If it were _base, then the font caches
+    # would contain _base-relative paths in them. Unfortunately pango interprets
+    # those as absolute paths and ends up failing to find all fonts.
+    os.environ["FONTCONFIG_SYSROOT"] = "/"
+    os.environ["GDK_PIXBUF_MODULEDIR"] = os.path.join(gtk_runtime_dir, "usr", "lib",
+                                                      "x86_64-linux-gnu", "gdk-pixbuf-2.0",
+                                                      "2.10.0", "loaders")
+    os.environ["GDK_PIXBUF_MODULE_FILE"] = os.path.join(os.environ["GDK_PIXBUF_MODULEDIR"], "loaders.cache")
+    os.system(os.path.join(gtk_runtime_dir, "usr/lib/x86_64-linux-gnu/gdk-pixbuf-2.0/gdk-pixbuf-query-loaders") + " --update-cache")
+
+
+_hermeticity_fixup()
+
+
 _static_binding_error = ('When using gi.repository you must not import static '
                          'modules like "gobject". Please change all occurrences '
                          'of "import gobject" to "from gi.repository import GObject". '