RFR: 8351073: [macos] jpackage produces invalid Java runtime DMG bundles

[Alexander Matveev]

On Tue, 20 May 2025 17:00:21 GMT, Alexey Semenyuk <asemenyuk at openjdk.org> wrote:

>> Fixed jpackage to produce valid Java runtimes based on description below:
>> 
>> Definitions:
>> 
>> - JDK bundle defined as bundle which contains "Contents/Home", "Contents/MacOS/libjli.dylib" and "Contents/Info.plist".
>> - Signed JDK bundle contains all files as JDK bundle + "Contents/_CodeSignature".
>> - JDK image defined as content of "Contents/Home".
>> - Signed JDK image does not exist, since it cannot be signed as bundle.
>> 
>> jpackage output based on input:
>> 
>> 1. "--runtime-image" points to unsigned JDK bundle and --mac-sign is not provided:
>> - jpackage will copy all files as is from provided path and run ad-hoc codesign.
>> 
>> 2. "--runtime-image" points to unsigned JDK bundle and --mac-sign is provided:
>> - jpackage will copy all files as is from provided path and run codesign with appropriate certificate based on same logic as we do for application image.
>>  
>> 3. "--runtime-image" points to signed JDK bundle and --mac-sign is not provided:
>> - jpackage will copy all files as is from provided path including "Contents/_CodeSignature" to preserve signing.
>> 
>> 4. "--runtime-image" points to signed JDK bundle and --mac-sign is provided:
>> - jpackage will copy all files as is from provided path including "Contents/_CodeSignature" and will re-sign bundle with appropriate certificate.
>> 
>> 5. "--runtime-image" points to JDK image and --mac-sign is not provided:
>>  - jpackage will check for libjli.dylib presence in "lib" folder.
>>  - Create JDK bundle by putting all files from provided path to "Contents/Home", libjli.dylib from "lib" to "Contents/MacOS/libjli.dylib" and create default "Contents/Info.plist" similar to what we do for runtime in application image.
>> - Ad-hoc signing will done.
>> 
>> 6. "--runtime-image" points to JDK image and --mac-sign is provided:
>> - 2 first steps from 5 and certificate signing will be done.
>
> test/jdk/tools/jpackage/helpers/jdk/jpackage/test/JPackageCommand.java line 1004:
> 
>> 1002:             // External runtime image should be R/O unless it is on macOS.
>> 1003:             // On macOS it will be signed ad-hoc or with real certificate.
>> 1004:             return !TKit.isOSX();
> 
> Do I get the comment right, and jpackage will modify the image supplied with `--runtime-image` parameter? This is wrong. jpackage must not modify any externally supplied files/directories unless this is app image signing on macos.

Yes, you get the comment right. We do sign runtime image as well (same as app image). We do ad-hoc signing for runtime image if signing is not requested. Ad-hoc signing will modify runtime image. I think you mean case when "--app-image" and "--runtime-image" is specified, then yes we should not modify it, but when we packaging just runtime it will be modify due to signature. I will update test to reflect it.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25314#discussion_r2099145308