PackageApplication stopped working with OS X 10.10 (Yosemite) today - ios

Question

UPDATE:
The correct answer is probably this one: Xcode 6.1 error while building IPA
Using Jenkins to build iOS projects from repositories since a few years. Suddenly today a new error occurs, stopping builds.
I think I based most of this setup on this tutorial way back:
http://www.raywenderlich.com/22816/beginning-automated-testing-with-xcode-part-22
This step causes the error:
# 4
echo "*** Post build step 4"
/usr/bin/xcrun -sdk iphoneos PackageApplication \
-o "${IPA_DIR}/${PROJECT}.ipa" \
-verbose "${APP}" \
-sign "${SIGNING_IDENTITY}" \
--embed "${PROVISIONING_PROFILE}"
It's a bit tricky to look at the logs where the error occurs, but here it is:
### Codesigning '/Users/Shared/Jenkins/Home/jobs/myapp/workspace/myapp_adhoc_7.mobileprovision' with 'iPhone Distribution: mycompany Inc.'
+ /usr/bin/codesign --force --preserve-metadata=identifier,entitlements,resource-rules --sign iPhone Distribution: mycompany Inc. --resource-rules=/var/folders/y1/4hrpc2851b7dxn9bhlkhbrnr00007q/T/ipIxOjxE2z/Payload/myapp.app/ResourceRules.plist --entitlements /var/folders/y1/4hrpc2851b7dxn9bhlkhbrnr00007q/T/ipIxOjxE2z/entitlements_plistYdluSmqT /var/folders/y1/4hrpc2851b7dxn9bhlkhbrnr00007q/T/ipIxOjxE2z/Payload/myapp.app
Program /usr/bin/codesign returned 1 : [Warning: usage of --preserve-metadata with option "resource-rules" (deprecated in Mac OS X >= 10.10)!
Warning: --resource-rules has been deprecated in Mac OS X >= 10.10!
/var/folders/y1/4hrpc2851b7dxn9bhlkhbrnr00007q/T/ipIxOjxE2z/Payload/myapp.app/ResourceRules.plist: cannot read resources
]
error: /usr/bin/codesign --force --preserve-metadata=identifier,entitlements,resource-rules --sign iPhone Distribution: mycompany Inc. --resource-rules=/var/folders/y1/4hrpc2851b7dxn9bhlkhbrnr00007q/T/ipIxOjxE2z/Payload/myapp.app/ResourceRules.plist --entitlements /var/folders/y1/4hrpc2851b7dxn9bhlkhbrnr00007q/T/ipIxOjxE2z/entitlements_plistYdluSmqT /var/folders/y1/4hrpc2851b7dxn9bhlkhbrnr00007q/T/ipIxOjxE2z/Payload/myapp.app failed with error 1. Output: Warning: usage of --preserve-metadata with option "resource-rules" (deprecated in Mac OS X >= 10.10)!
Warning: --resource-rules has been deprecated in Mac OS X >= 10.10!
/var/folders/y1/4hrpc2851b7dxn9bhlkhbrnr00007q/T/ipIxOjxE2z/Payload/myapp.app/ResourceRules.plist: cannot read resources
I'll try to fix this myself and later add the solution here, but in case anyone is faster than me please go ahead.
I have not specified --resource-rules in any settings. I guess xcrun uses this setting on its own, even though it is deprecated.

Answer 1

Instead of using xcrun, you can use xcodebuild to create an archive and then run xcodebuild again to create the IPA file.
# Create an archive
xcodebuild -alltargets -configuration "${CONFIGURATION}" -scheme "${SCHEME}" -archivePath "${APP_PATH}/${PROJECT}.xcarchive" archive
# Create the IPA file from the archive
xcodebuild -exportProvisioningProfile "${PROVISIONING_PROFILE_NAME}" -exportArchive -exportFormat IPA -archivePath "${APP_PATH}/${PROJECT}.xcarchive" -exportPath "${IPA_DIR}/${PROJECT}.ipa" CODE_SIGN_IDENTITY="${SIGNING_IDENTITY}"
Note that ${PROVISIONING_PROFILE_NAME} should contain the name of the provisional profile, and not the path to the file itself.

Answer 2

Found the answer.
The problem that occurred now was the "xcrun PackageApplication" something something line. I had to remove the "-sign some profile" parameter, then things started working again.
That said I don't know why signing was necessary before, and why it isn't now so can't tell if this is going to cause some problem later.