meson: Move all code generation scripts to utils/codegen/

We have multiple code generation scripts in utils/, mixed with other
miscellaneous utilities, as well as a larger code base based on mojom in
utils/ipc/. To make code sharing easier between the generator scripts,
without creating a mess in the utils/ directory, move all the code
generation code to utils/codegen/.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>

1 files changed, 79 insertions, 0 deletions

diff --git a/utils/codegen/ipc/extract-docs.py b/utils/codegen/ipc/extract-docs.py
new file mode 100755
index 00000000..61f44cae
--- /dev/null
+++ b/utils/codegen/ipc/extract-docs.py
@@ -0,0 +1,79 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (C) 2021, Google Inc.
+#
+# Author: Paul Elder <paul.elder@ideasonboard.com>
+#
+# Extract doxygen documentation from mojom files
+
+import argparse
+import re
+import sys
+
+regex_block_start = re.compile(r'^/\*\*$')
+regex_block_end = re.compile(r'^ \*/$')
+regex_spdx = re.compile(r'^/\* SPDX-License-Identifier: .* \*/$')
+
+
+def main(argv):
+
+    # Parse command line arguments
+    parser = argparse.ArgumentParser()
+    parser.add_argument('-o', dest='output', metavar='file',
+                        type=argparse.FileType('w', encoding='utf-8'),
+                        default=sys.stdout,
+                        help='Output file name (default: standard output)')
+    parser.add_argument('input', type=str,
+                        help='Input file name.')
+    args = parser.parse_args(argv[1:])
+
+    lines = open(args.input, 'r').readlines()
+    pipeline = args.input.split('/')[-1].replace('.mojom', '')
+
+    if not regex_spdx.match(lines[0]):
+        raise Exception(f'Missing SPDX license header in {args.input}')
+
+    data = lines[0]
+    data += f'''\
+/*
+ * Copyright (C) 2021, Google Inc.
+ *
+ * Docs file for generated {pipeline}.mojom
+ *
+ * This file is auto-generated. Do not edit.
+ */
+
+namespace libcamera {{
+
+'''
+
+    in_block = False
+    comment = ''
+    for lineno, line in enumerate(lines, start=1):
+        if regex_block_start.match(line):
+            if in_block:
+                raise SyntaxError('Expected end of comment',
+                                  (args.input, lineno, 1, line))
+            in_block = True
+            comment = line
+            continue
+
+        if regex_block_end.match(line):
+            if in_block:
+                comment += line
+                data += comment + '\n'
+            in_block = False
+            continue
+
+        if in_block:
+            comment += line
+
+    data += '} /* namespace libcamera */\n'
+
+    args.output.write(data)
+
+    return 0
+
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv))