1 files changed, 91 insertions, 0 deletions
diff --git a/gen_blueprints.py b/gen_blueprints.py
new file mode 100755
index 000000000..bbdd6786b
--- /dev/null
+++ b/gen_blueprints.py
@@ -0,0 +1,91 @@
+#!/usr/bin/env python
+#
+# Copyright 2015 Google Inc. 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 the Android.bp file for prebuilts/ndk."""
+import os
+
+
+def local_path(path):
+    """Returns an abspath to the given path from this file's directory."""
+    return os.path.normpath(os.path.join(os.path.dirname(__file__), path))
+
+
+def find(path, names):
+    """Finds a list of files in a directory that match the given names."""
+    found = []
+    for root, _, files in os.walk(path):
+        for file_name in sorted(files):
+            if file_name in names:
+                abspath = os.path.abspath(os.path.join(root, file_name))
+                rel_to_root = abspath.replace(os.path.abspath(path), '')
+                found.append(rel_to_root[1:])  # strip leading /
+    return found
+
+
+def sdk_version_from_path(path):
+    """Returns the integer SDK version for the given path."""
+    return int(path.split('/')[0].split('-')[1])
+
+
+def get_prebuilts(names):
+    """Returns a list of prebuilt objects that match the given names."""
+    prebuilts_path = local_path('current/platforms')
+    prebuilts = find(prebuilts_path, names)
+    prebuilts = [p for p in prebuilts if 'arch-arm/' in p]
+    prebuilts.sort(key=sdk_version_from_path)
+    return prebuilts
+
+
+def gen_crt_prebuilt(_, name, version):
+    """Generate a module for a CRT prebuilt object."""
+    return ('ndk_prebuilt_object {{\n'
+            '    name: "ndk_{name}.{version}",\n'
+            '    sdk_version: "{version}",\n'
+            '}}'.format(name=name, version=version))
+
+
+def gen_prebuilts(module_generator, names):
+    """Generate blueprints for the given modules."""
+    prebuilts = []
+    for prebuilt in get_prebuilts(names):
+        name = os.path.splitext(os.path.basename(prebuilt))[0]
+        version = sdk_version_from_path(prebuilt)
+        if version < 9:
+            # We don't support anything before Gingerbread any more.
+            continue
+        prebuilts.append(module_generator(prebuilt, name, version))
+    return prebuilts
+
+
+def main():
+    """Program entry point."""
+    blueprints = gen_prebuilts(gen_crt_prebuilt, (
+        'crtbegin_so.o',
+        'crtend_so.o',
+        'crtbegin_dynamic.o',
+        'crtbegin_static.o',
+        'crtend_android.o'))
+
+    with open(local_path('Android.bp'), 'w') as bpfile:
+        bpfile.write('// THIS FILE IS AUTOGENERATED BY gen-blueprints.py\n')
+        bpfile.write('// DO NOT EDIT\n')
+        bpfile.write('\n')
+        bpfile.write('\n\n'.join(blueprints))
+        bpfile.write('\n\n')
+        bpfile.write('build = ["stl.bp"]')
+
+
+if __name__ == '__main__':
+    main()