ci: test linking on all static plugins

Will ensure that our static libraries and pkg-config files are properly
generated.

.gitlab-ci.yml

@@ -166,8 +166,13 @@ meson shared:
 meson static:
   extends: .img-stable
   script:
-    - meson build --default-library=static
+    - meson build --default-library=static --prefix=$(pwd)/install -Dsodium=built-in
+    - ninja -C build install
+    - ./ci/generate-static-test.py test-static-link-all
+    - cd test-static-link-all
+    - PKG_CONFIG_PATH=$PKG_CONFIG_PATH:$(pwd)/../install/lib/x86_64-linux-gnu/pkgconfig meson build
     - ninja -C build
+    - ./build/test-gst-static
   rules:
     - if: '$UPDATE_IMG == null || $UPDATE_IMG == "stable"'
 

ci/generate-static-test.py

@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+# Generate a meson project statically linking on all plugins
+
+import sys
+import os
+
+from utils import iterate_plugins
+
+# the csound version used on ci does not ship a .pc file
+IGNORE = ['csound']
+
+outdir = sys.argv[1]
+
+plugins = list(filter(lambda p: p not in IGNORE, iterate_plugins()))
+deps = list(
+    map(lambda p: "    dependency('gst{}', static: true)".format(p), plugins))
+deps = ',\n'.join(deps)
+
+meson = """
+project('test-gst-plugins-rs-static', 'c')
+
+gst_deps = [
+    dependency('gstreamer-1.0'),
+%s
+]
+
+executable('test-gst-static', ['main.c'],
+  dependencies: gst_deps,
+)
+""" % (deps)
+
+declare = list(
+    map(lambda p: "GST_PLUGIN_STATIC_DECLARE({});".format(p), plugins))
+declare = '\n'.join(declare)
+
+register = list(
+    map(lambda p: "\tGST_PLUGIN_STATIC_REGISTER({});".format(p), plugins))
+register = '\n'.join(register)
+
+check = list(
+    map(lambda p: "\tg_assert (gst_registry_find_plugin(registry, \"{}\"));".format(p), plugins))
+check = '\n'.join(check)
+
+main = """
+#include <gst/gst.h>
+
+%s
+
+int main(int argc, char **argv)
+{
+	g_autoptr(GstRegistry) registry = NULL;
+
+	gst_init(&argc, &argv);
+
+%s
+
+	registry = gst_registry_get();
+
+%s
+
+	return 0;
+}
+""" % (declare, register, check)
+
+os.makedirs(outdir)
+
+meson_file = open(os.path.join(outdir, 'meson.build'), 'w')
+meson_file.write(meson)
+
+main_file = open(os.path.join(outdir, 'main.c'), 'w')
+main_file.write(main)