depends_on :java

[vitorgalvao]

Builds on #7993.

Interface for depends_on :java:

• Similar to depends_on :macos and depends_on :x11. Valid examples:
  • depends_on java: true # any java version
  • depends_on java: '8' # exact version
  • depends_on java: ['6', '7'] # any of array of versions
  • depends_on java: '>= 6' # equal to or greater than version

[adidalal]

Early implementation followup at #16591

[vitorgalvao]

@reitermarkus What about we scrap this, remove the depends_on_java caveat and start making those casks depends_on formula: 'openjdk'? Do you foresee major problems with that approach? Alternatively, seeing as we’re so integrated with HB, would it be viable to use whatever formulae use to check for java?

[reitermarkus]

depends_on formula: 'openjdk' does not install it globally, i.e. link it to /Library/Java/JavaVirtualMachines which most GUI apps probably depend on.

[CAMOBAP]

Is there a way to achieve depends_on java: '>= 6' behavior? Or the implementation still on the way?

[vitorgalvao]

Is there a way to achieve depends_on java: '>= 6' behavior?

No.

Or the implementation still on the way?

Also no. The feature is desirable, but no one is working on it. This has never evolved in six years. Either we get an outside contribution for it, or we abandon it.

[reitermarkus]

There is now an openjdk formula and depends_on :java in formulae is deprecated if not already removed.

[CAMOBAP]

@vitorgalvao @reitermarkus what if I will add depends_on openjdk@8, does it mean that my formula depends exactly on java 8, and will download java 8 even if java 11 available?

[reitermarkus]

Yes. You should always depend on the latest version unless an older version is actually necessary.

[MikeMcQuaid]

Closing this, as-of Homebrew/brew#11290 being merged I think we're as good as we're going to get here and it's been open without progress for a long time.