Move generated files to dedicated folders named by namespace

Making it cleaner and simpler to navigate and removing previous
ugly and now useless hack where we were renaming files ourself
to make meson happy.

generate_code.py

@@ -50,8 +50,10 @@ if __name__ == "__main__":
         '--outdir=' + opts.out,
         '--assembly-name=' + opts.assembly_name,
         '--glue-includes=' + opts.abi_includes,
-        '--abi-c-filename=' + os.path.join(opts.out, opts.assembly_name + "-abi.c"),
-        '--abi-cs-filename=' + os.path.join(opts.out, opts.assembly_name + "-abi.cs"),
+        '--abi-c-filename=' +
+        os.path.join(opts.out, opts.assembly_name + "-abi.c"),
+        '--abi-cs-filename=' +
+        os.path.join(opts.out, opts.assembly_name + "-abi.cs"),
     ]
 
     if opts.schema:
@@ -68,21 +70,24 @@ if __name__ == "__main__":
     # as meson doesn't like path separator in output names.
     regex = re.compile('_')
     dirs = set()
-    for _f in opts.files.split(';'):
-        fpath = os.path.join(opts.out, regex.sub("/", _f, 1))
-        dirs.add(os.path.dirname(fpath))
-        _f = os.path.join(opts.out, _f)
-        shutil.move(fpath, _f)
+    expected_files = set(opts.files.split(';'))
+    for _f in expected_files:
+        dirs.add(os.path.dirname(_f))
 
-    missing_files = []
-    for _dir in dirs:
-        missing_files.extend(glob.glob(os.path.join(_dir, '*.cs')))
-
-    if missing_files:
+    generated = set(glob.glob(os.path.join('*/*.cs')))
+    rcode = 0
+    not_listed = generated - expected_files
+    if not_listed:
         print("Following files were generated but not listed:\n    %s" %
-              '\n    '.join(["'%s_%s'," % (m.split(os.path.sep)[-2], m.split(os.path.sep)[-1])
-             for m in missing_files]))
-        exit(1)
+              '\n    '.join(["'%s/%s'," % (m.split(os.path.sep)[-2], m.split(os.path.sep)[-1])
+                             for m in not_listed]))
+        rcode = 1
 
-    for _dir in dirs:
-        shutil.rmtree(_dir)
+    not_generated = expected_files - generated
+    if not_generated:
+        print("Following files were generated but not listed:\n    %s" %
+              '\n    '.join(["'%s/%s'," % (m.split(os.path.sep)[-2], m.split(os.path.sep)[-1])
+                             for m in not_generated]))
+        rcode = 1
+
+    exit(rcode)