RFR: 8350594: Misleading warning about install dir for DMG packaging

[Michael Hall]

Thanks, mainly curious. 
Now, mostly about how the JavaVirtualMachines MacOS specific JRE’s might be built.

> On Feb 27, 2025, at 11:43 AM, Alexey Semenyuk <alexey.semenyuk at oracle.com> wrote:
> 
> Hi Michael,
> 
> See my comments inline.
> 
> On 2/27/2025 11:11 AM, Michael Hall wrote:
>> 
>> 
>>> On Feb 26, 2025, at 9:22 PM, Michael Hall <mik3hall at gmail.com> <mailto:mik3hall at gmail.com> wrote:
>>> 
>>>> 
>>>> I don’t get that if I delete the existing dmg first.
>>>> 
>>>> Full verbose output at…
>>>> 
>>>> http://mikehall.pairserver.com/rt.txt
>>> 
>> 
>> Is there a how-to on using --runtime-image on MacOS? How are you supposed to get a valid runtime to put into JavaVirtualMachines?
>> 
>> I installed jdk 23 to bootstrap a jdk build. I jpackage’d that.
>> 
>> jpackage --verbose -n rt -t dmg --runtime-image /Users/mjh/Documents/GitHub/jdk/build/macosx-aarch64-server-release/jdk
> This command should produce a Java runtime in JavaVirtualMachines subtree.
> 
>> 
>> The resulting jdk actually appears to have a similar directory layout to what is in JavaVirtualMachines. 
>> 
>> It lacks the _CodeSignature, Info.plist, and MacOS file and directories.
> This is intentional (not sure it is correct, though).
> 
>> 
>> It still is not found with either “java —version” or “/usr/libexec/java_home”
>> 
>> I tried giving it a more standard name in case naming convention mattered.
> No, it doesn't. The name you tried should work.
> 
>> 
>> The built is jdk 25 and the 23 bootstrap still shows current. 
>> 
>> I thought maybe using that runtime to build an application then jpackage would make it a valid MacOS runtime
>> 
>> But jpackage --runtime-image with the runtime from that gets a couple no such file exceptions on
>> runtime/Contents/Home/lib/libnio.dylib.dSYM/Contents/Info.plist
>> 
>> The app gets
>> HalfPipe.app/Contents/MacOS/HalfPipe
>> Error: could not open `/Users/mjh/HalfPipe/HalfPipe_jpkg/outputdir/HalfPipe.app/Contents/runtime/Contents/Home//lib/jvm.cfg’
>> 
>> Possibly not a bug but not obviously easy either. 
> 
> Thank you for trying it out! I'll look closer at the issues you reported and get back to you.
> 
> - Alexey

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