modules: check if all dependencies can be satisfied

Verifies if all dependencies are correctly listed in the modinfo.c too
and stop the builds if they're not.

Signed-off-by: Jose R. Ziviani <jziviani@suse.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Jose R. Ziviani <jziviani@suse.de>
Message-Id: <20210624103836.2382472-5-kraxel@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

scripts/modinfo-generate.py

@@ -59,6 +59,7 @@ def generate(name, lines):
     print_array("deps", deps)
     print_array("opts", opts)
     print("},{");
+    return deps
 
 def print_pre():
     print("/* generated by scripts/modinfo-generate.py */")
@@ -71,14 +72,26 @@ def print_post():
     print("}};")
 
 def main(args):
+    deps = {}
     print_pre()
     for modinfo in args:
         with open(modinfo) as f:
             lines = f.readlines()
         print("    /* %s */" % modinfo)
         (basename, ext) = os.path.splitext(modinfo)
-        generate(basename, lines)
+        deps[basename] = generate(basename, lines)
     print_post()
 
+    flattened_deps = {flat.strip('" ') for dep in deps.values() for flat in dep}
+    error = False
+    for dep in flattened_deps:
+        if dep not in deps.keys():
+            print("Dependency {} cannot be satisfied".format(dep),
+                  file=sys.stderr)
+            error = True
+
+    if error:
+        exit(1)
+
 if __name__ == "__main__":
     main(sys.argv[1:])