RFR: 8368030: Make package bundlers stateless

[Alexey Semenyuk]

On Wed, 24 Sep 2025 23:17:02 GMT, Alexander Matveev <almatvee at openjdk.org> wrote:

>> Introduce `jdk.jpackage.internal.SystemEnvironment` interface to describe system tools needed for building specific package bundles with three immediate subinterfaces: `WinSystemEnvironment`, `LinuxSystemEnvironment`, and `MacDmgSystemEnvironment`.
>> 
>> `LinuxSystemEnvironment` has two subinterfaces: `LinuxDebSystemEnvironment` and `LinuxRpmSystemEnvironment`.
>> 
>> There is no `MacSystemEnvironment` interface as pkg and dmg bundlers are unrelated, unlike rpm and deb bundlers, which share a fair amount of code.
>> 
>> There is no `MacPkgSystemEnvironment` interface because the pkg bundler doesn't validate tools.
>> 
>> Instances of these interfaces are created as member fields of the corresponding bundler classes, i.e., bundling system tools are validated only once when a specific bundler is instantiated.
>> 
>> Move the bundling code away from *Bundler classes into *Packager classes and completely isolate it from the "params". This is a follow-up for the effort to isolate the "params" in [JDK-8333664](https://bugs.openjdk.org/browse/JDK-8333664).
>
> src/jdk.jpackage/linux/classes/jdk/jpackage/internal/LinuxDebPackager.java line 82:
> 
>> 80:             } catch (IOException ex) {
>> 81:                 // Try the default path if differ
>> 82:                 if (!realPath.toString().equals(file.toString())) {
> 
> Why converting to `String`? `realPath` and `file` are both `Path`. `Path` has `equals` method.

This code is copied from [LinuxDebBundler.java#L108](https://github.com/openjdk/jdk/blame/569e78080b3c25c95d85e9e194626f95f86b9b10/src/jdk.jpackage/linux/classes/jdk/jpackage/internal/LinuxDebBundler.java#L108).

`Path.equals()` will always return `true` as two Path objects reference the same file. The test must compare path strings, not that two Path objects reference the same file (which they do). That is why `String.equals()` is used.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27377#discussion_r2379601925