add metadata to OTA package in easily-parsed form

This is only for use by the tools that manipulate OTA packages; it
doesn't touch device code.

Change-Id: I1e21b24b86340d8f86c9d15b2aeb79c461f75d18

diff --git a/tools/releasetools/ota_from_target_files b/tools/releasetools/ota_from_target_files
index ba29f9b..cf5fb34 100755 (executable)
--- a/tools/releasetools/ota_from_target_files
+++ b/tools/releasetools/ota_from_target_files
@@ -353,12 +353,17 @@ def WriteFullOTAPackage(input_zip, output_zip):
     # change very often.
     script = edify_generator.EdifyGenerator(2)
 
+  metadata = {"post-build": GetBuildProp("ro.build.fingerprint", input_zip),
+              "pre-device": GetBuildProp("ro.product.device", input_zip),
+              }
+
   device_specific = common.DeviceSpecificParams(
       input_zip=input_zip,
       input_version=GetRecoveryAPIVersion(input_zip),
       output_zip=output_zip,
       script=script,
-      input_tmp=OPTIONS.input_tmp)
+      input_tmp=OPTIONS.input_tmp,
+      metadata=metadata)
 
   if not OPTIONS.omit_prereq:
     ts = GetBuildProp("ro.build.date.utc", input_zip)
@@ -404,6 +409,13 @@ def WriteFullOTAPackage(input_zip, output_zip):
 
   script.UnmountAll()
   script.AddToZip(input_zip, output_zip)
+  WriteMetadata(metadata, output_zip)
+
+
+def WriteMetadata(metadata, output_zip):
+  common.ZipWriteStr(output_zip, "META-INF/com/android/metadata",
+                     "".join(["%s=%s\n" % kv
+                              for kv in sorted(metadata.iteritems())]))
 
 
 class File(object):
@@ -589,13 +601,17 @@ def WriteIncrementalOTAPackage(target_zip, source_zip, output_zip):
   else:
     raise ValueError('unknown script mode "%s"' % (OPTIONS.script_mode,))
 
+  metadata = {"pre-device": GetBuildProp("ro.product.device", source_zip),
+              }
+
   device_specific = common.DeviceSpecificParams(
       source_zip=source_zip,
       source_version=source_version,
       target_zip=target_zip,
       target_version=target_version,
       output_zip=output_zip,
-      script=script)
+      script=script,
+      metadata=metadata)
 
   print "Loading target..."
   target_data = LoadSystemFiles(target_zip)
@@ -640,6 +656,8 @@ def WriteIncrementalOTAPackage(target_zip, source_zip, output_zip):
 
   source_fp = GetBuildProp("ro.build.fingerprint", source_zip)
   target_fp = GetBuildProp("ro.build.fingerprint", target_zip)
+  metadata["pre-build"] = source_fp
+  metadata["post-build"] = target_fp
 
   script.Mount("MTD", "system", "/system")
   script.AssertSomeFingerprint(source_fp, target_fp)
@@ -818,6 +836,7 @@ def WriteIncrementalOTAPackage(target_zip, source_zip, output_zip):
     scirpt.AppendExtra(OPTIONS.extra_script)
 
   script.AddToZip(target_zip, output_zip)
+  WriteMetadata(metadata, output_zip)
 
 
 def main(argv):