libcamera: tracepoints: Fix copyright year for reproducible builds

The tracepoints.h file is generated from the tracepoints.h.in template
by the gen-tp-header.py script. The template contains a {{year}}
placeholder for the copyright year, which the script fills with the
current year. This breaks reproducible builds with at least the openSUSE
debugsource package.

As the gen-tp-header.py script doesn't add any copyrightable contents to
the tracepoints.h file, fix this by replacing the {{year}} placeholder
with the year of the last copyright-worthy change to tracepoints.h.in.

Signed-off-by: Bernhard M. Wiedemann <bwiedemann@suse.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

include/libcamera/internal/tracepoints.h.in

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 /*
- * Copyright (C) {{year}}, Google Inc.
+ * Copyright (C) 2020, Google Inc.
  *
  * Tracepoints with lttng
  *

utils/codegen/gen-tp-header.py

@@ -6,7 +6,6 @@
 #
 # Generate header file to contain lttng tracepoints
 
-import datetime
 import jinja2
 import pathlib
 import os
@@ -20,7 +19,6 @@ def main(argv):
     output = argv[2]
     template = argv[3]
 
-    year = datetime.datetime.now().year
     path = pathlib.Path(output).absolute().relative_to(argv[1])
 
     source = ''
@@ -28,7 +26,7 @@ def main(argv):
         source += open(fname, 'r', encoding='utf-8').read() + '\n\n'
 
     template = jinja2.Template(open(template, 'r', encoding='utf-8').read())
-    string = template.render(year=year, path=path, source=source)
+    string = template.render(path=path, source=source)
 
     f = open(output, 'w', encoding='utf-8').write(string)