Signing and Notarizing install4j DMGs for OSX

0. You will need an up to date Apple Developer ID subscription and have a valid developer key for signing/notarizing apps, installers and DMGs available on your system.

1. Build the install4j installers - signing these for windows requires a Certum cryptokey or other suitable java codesigning cert. Details to be provided.

2. Unpack the OSX installer to a local directory
hdiutil attach build/install4j/11/Jalview_Develop-2_11_2_0dev-d20210128-macos-java_11.dmg 
mkdir newdmg; ditto /Volumes/Jalview\ Develop\ Installer newdmg/

3. Remove the uninstaller if necessary/and/or others, and then deep sign the dmg

xattr -cr ./newdmg/Jalview\ Develop.app/Contents/Resources/app/jre/Contents/MacOS/libjli.dylib 
codesign --verify --deep -v ./newdmg/Jalview\ Develop.app/Contents/Resources/app/jre/Contents/MacOS/libjli.dylib 

codesign --force --deep -vvvv -s "Developer ID" --options runtime --entitlements ./utils/osx_signing/entitlements.txt ./newdmg/Jalview\ Develop.app/Contents/Resources/app/jre/Contents/MacOS/libjli.dylib 

codesign --verify --deep -v ./newdmg/Jalview\ Develop.app/Contents/Resources/app/jre/Contents/MacOS/libjli.dylib 

codesign --force --deep -vvvv -s "Developer ID" --options runtime --entitlements ./utils/osx_signing/entitlements.txt ./newdmg/Jalview\ Develop.app/Contents/MacOS/JavaApplicationStub 

hdiutil create -megabytes 240 -srcfolder ./newdmg -volname 'Jalview Develop Installer (2.11.2)' Jalview_Develop-2_11_2-macos-java_11.dmg

codesign --force --deep -vvvv -s "Developer ID" --options runtime --entitlements ./utils/osx_signing/entitlements.txt Jalview_Develop-2_11_2-macos-java_11.dmg

codesign --deep -vvvv Jalview_Develop-2_11_2-macos-java_11.dmg

4. Notarize
xcrun altool --notarize-app --primary-bundle-id "org.jalview.jalview-desktop" -u jalview-dev-owner@jalview.org -p $ALTOOL_PASSWORD --file Jalview_Develop-2_11_2-macos-java_11.dmg 
.. run with --notarization-info $notarization-session-id until complete

5. Staple to dmg so it can be verified without a net connection.