1 files changed, 77 insertions, 0 deletions
diff --git a/tools/update_build_version.py b/tools/update_build_version.py
new file mode 100755
index 0000000..b353607
--- /dev/null
+++ b/tools/update_build_version.py
@@ -0,0 +1,77 @@
+#!/usr/bin/env python
+
+# Copyright 2018 The Amber Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Generates build-versions.h in the src/ directory.
+#
+# Args:  <output_dir> <amber-dir> <spirv-tools-dir> <spirv-headers> <glslang-dir> <shaderc-dir>
+
+from __future__ import print_function
+
+import datetime
+import os.path
+import re
+import subprocess
+import sys
+import time
+
+OUTFILE = 'src/build-versions.h'
+
+
+def command_output(cmd, directory):
+  p = subprocess.Popen(cmd,
+                       cwd=directory,
+                       stdout=subprocess.PIPE,
+                       stderr=subprocess.PIPE)
+  (stdout, _) = p.communicate()
+  if p.returncode != 0:
+    raise RuntimeError('Failed to run {} in {}'.format(cmd, directory))
+  return stdout
+
+
+def describe(directory):
+  return command_output(
+      ['git', 'log', '-1', '--format=%h'], directory).rstrip().decode()
+
+
+def get_version_string(project, directory):
+  return "#define {}_VERSION \"{}\"".format(project.upper(), describe(directory))
+
+
+def main():
+  if len(sys.argv) != 7:
+    print('usage: {} <outdir> <amber-dir> <spirv-tools-dir> <spirv-headers> <glslang-dir> <shaderc-dir>'.format(
+      sys.argv[0]))
+    sys.exit(1)
+
+  outdir = sys.argv[1]
+
+  projects = ['amber', 'spirv_tools', 'spirv_headers', 'glslang', 'shaderc']
+  new_content = ''.join([
+    '{}\n'.format(get_version_string(p, d))
+    for (p, d) in zip(projects, sys.argv[2:])
+  ])
+
+  file = outdir + "/" + OUTFILE
+  if os.path.isfile(file):
+    with open(file, 'r') as f:
+      if new_content == f.read():
+        return
+  with open(file, 'w') as f:
+    f.write(new_content)
+
+
+if __name__ == '__main__':
+  main()