Add checksum support for CMakeList generation
We now embed a checksum in the generated CMakeLists.txt files.
The emulators cmake build system will use this to make sure the
makefiles have not changed.
Changing the makefiles without regenerating the CMakeLists.txt will
result in a build break in the emulator.
Change-Id: I242dd3292b0d876d80d92cd36bdbe62c6197d259
diff --git a/cmake_transform.py b/cmake_transform.py
index 834dd4b..3e8d9c5 100644
--- a/cmake_transform.py
+++ b/cmake_transform.py
@@ -1,5 +1,6 @@
#!/bin/python
import argparse
+import hashlib
import json
import logging
import os
@@ -69,10 +70,22 @@
]
+def checksum(fname):
+ """Calculates a SHA256 digest of the given file name."""
+ m = hashlib.sha256()
+ with open(fname, 'r') as mk:
+ m.update(mk.read())
+ return m.hexdigest()
+
+
def generate_module(module):
"""Generates a cmake module."""
name = remove_lib_prefix(module['module'])
make = header()
+ mkfile = os.path.join(module['path'], 'Android.mk')
+ sha256 = checksum(mkfile)
+ make.append(
+ 'android_validate_sha256("${GOLDFISH_DEVICE_ROOT}/%s" "%s")' % (mkfile, sha256))
make.append('set(%s_src %s)' % (name, ' '.join(module['src'])))
if module['type'] == 'SHARED_LIBRARY':
make.append('android_add_shared_library(%s)' % name)
@@ -149,8 +162,12 @@
# The root, it will basically just include all the generated files.
root = os.path.join(args.outdir, 'CMakeLists.txt')
+ mkfile = os.path.join(args.outdir, 'Android.mk')
+ sha256 = checksum(mkfile)
cmake[root] = header()
cmake[root].append('set(GOLDFISH_DEVICE_ROOT ${CMAKE_CURRENT_SOURCE_DIR})')
+ cmake[root].append(
+ 'android_validate_sha256("${GOLDFISH_DEVICE_ROOT}/%s" "%s")' % (mkfile, sha256))
# Generate the modules.
for module in modules: