releasetools: Capture stderr output when calling delta_generator.
Prior to this CL, the call to delta_generator in
check_ota_package_signature.VerifyAbOtaPayload() didn't redirect stderr.
The logs (mostly INFO) on successful verification added noise to the
normal output, which also upset the unittest result parser.
This CL captures stderr outputs from delta_generator, and will only dump
them on error.
Bug: 72884343
Test: `python -m unittest -v test_ota_from_target_files > /dev/null`
gives clean output.
Test: Inject error into delta_generator. The call to
check_ota_package_signature correctly dumps both of stdout and
stderr outputs.
Change-Id: I014a4b21bf758dcf0a4b9963259d6019851935ee
diff --git a/tools/releasetools/check_ota_package_signature.py b/tools/releasetools/check_ota_package_signature.py
index 81b3c1e..3cac90a 100755
--- a/tools/releasetools/check_ota_package_signature.py
+++ b/tools/releasetools/check_ota_package_signature.py
@@ -165,7 +165,7 @@
cmd = ['delta_generator',
'--in_file=' + payload_file,
'--public_key=' + pubkey]
- proc = common.Run(cmd, stdout=subprocess.PIPE)
+ proc = common.Run(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
stdoutdata, _ = proc.communicate()
assert proc.returncode == 0, \
'Failed to verify payload with delta_generator: %s\n%s' % (package,