Allow the user to set ANDROID_PW_FILE to the name of a file for
storing password keys. When the tools need additional passwords, they
will rewrite this file and invoke the user's editor for the new
passwords to be added. This allows passwords to be reused across
invocations of the signing tools, without making the user reenter them
every time.
Paranoid users can use a file stored in a ramdisk, or not use this
feature at all (the code will prompt for passwords in the ordinary way
when ANDROID_PW_FILE is not set).
The build system now (in donut) produces builds that use the testkey
cert for OTA package verification. Change the app-signing script to
also optionally substitute the "real" cert in both the recovery and
system images. Also fix bug where the build fingerprint and
description were not getting properly updated in the recovery
partition.
building images & OTA packages out of vendor/google.
No device code is touched by this change.
Original author: dougz
Merged from: //branches/cupcake/...
Automated import of CL 144270
