[Bug 2036873] [NEW] [WIP] Provide a bootstrapping build for Java 21 GA in focal and mantic -proposed.

[Vladimir Petko]

Public bug reported:

[Impact]

Java 21 is the latest stable release of Java. In order for Ubuntu to
provide a robust Java toolchain for our users the stable Ubuntu releases
(focal and jammy) should include Java 21.

Java 21 requires bootstrapping from Java 20 (or existing Java 21).
Neither Java 20 nor Java 21 are published in Jammy and Focal.

Mantic contains the Release Candidate Java 21 build 35. It was promoted
to a General Availability build on 20 September 2023.

adjust-bootjdk.patch (attached) allows bootstrapping from openjdk-17
that is present in Focal and Jammy releases. This patch is only intended
for bootstrapping of GA Java 21 build and contains limitations such as
disabled jtreg tests and disabled documentation package. The full
debdiff of bootstrap openjdk-21 package is attached.

The openjdk-21  21~35ea-1ubuntu1~20.04 should be published to focal -proposed and blocked from migration.
The openjdk-21  21~35ea-1ubuntu1~22.04 should be published to jammy -proposed and blocked from migration.

Those builds will allow publishing of the openjdk-21 21+35-X package
once it is available to Jammy and Focal.

Jtreg tests should be disabled for the package due to the large number
of packages that need to be upgraded in order to port jtreg7. This
should be handled as a separate issue.

[Test Plan]

The ppas are set up with security pocket enabled.

PPA: ppa:vpa1977/openjdk-21-jtreg
PPA: ppa:vpa1977/openjdk-21-bootstrapped

The jtreg7 with dependencies, openjdk-21  21~35ea-1ubuntu1~20.04 and
openjdk-21  21~35ea-1ubuntu1~22.04 are published to the PPA[1].

A dependent PPA[2] has openjdk-21 21+35-1 uploaded to focal and Jammy.
Note: final upload needs jtreg tests disabled.

The ppa:vpa1977/openjdk-21-bootstrapped[2] should build and jtreg tests
should pass (see comments).

Packages built in bootstrapped[2] PPA should pass installation tests
(see comments).

[Where problems could occur]

The packages need to be blocked from migration otherwise users will get
an incomplete openjdk-21 package (missing documentation).

The jtreg tests need to be disabled in the archive (either -1ubuntu1 or
+35-2 package) as we do not have an official jtreg port yet.

There are no packages in the archive depending on Java 21 (except
openjdk-21 itself).

[1] https://launchpad.net/~vpa1977/+archive/ubuntu/openjdk-21
[2] https://launchpad.net/~vpa1977/+archive/ubuntu/openjdk-21-bootstrapped

** Affects: openjdk-21 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2036873

Title:
  [WIP] Provide a bootstrapping build for Java 21 GA in focal and mantic
  -proposed.

Status in openjdk-21 package in Ubuntu:
  New

Bug description:
  [Impact]

  Java 21 is the latest stable release of Java. In order for Ubuntu to
  provide a robust Java toolchain for our users the stable Ubuntu
  releases (focal and jammy) should include Java 21.

  Java 21 requires bootstrapping from Java 20 (or existing Java 21).
  Neither Java 20 nor Java 21 are published in Jammy and Focal.

  Mantic contains the Release Candidate Java 21 build 35. It was
  promoted to a General Availability build on 20 September 2023.

  adjust-bootjdk.patch (attached) allows bootstrapping from openjdk-17
  that is present in Focal and Jammy releases. This patch is only
  intended for bootstrapping of GA Java 21 build and contains
  limitations such as disabled jtreg tests and disabled documentation
  package. The full debdiff of bootstrap openjdk-21 package is attached.

  The openjdk-21  21~35ea-1ubuntu1~20.04 should be published to focal -proposed and blocked from migration.
  The openjdk-21  21~35ea-1ubuntu1~22.04 should be published to jammy -proposed and blocked from migration.

  Those builds will allow publishing of the openjdk-21 21+35-X package
  once it is available to Jammy and Focal.

  Jtreg tests should be disabled for the package due to the large number
  of packages that need to be upgraded in order to port jtreg7. This
  should be handled as a separate issue.

  [Test Plan]

  The ppas are set up with security pocket enabled.

  PPA: ppa:vpa1977/openjdk-21-jtreg
  PPA: ppa:vpa1977/openjdk-21-bootstrapped

  The jtreg7 with dependencies, openjdk-21  21~35ea-1ubuntu1~20.04 and
  openjdk-21  21~35ea-1ubuntu1~22.04 are published to the PPA[1].

  A dependent PPA[2] has openjdk-21 21+35-1 uploaded to focal and Jammy.
  Note: final upload needs jtreg tests disabled.

  The ppa:vpa1977/openjdk-21-bootstrapped[2] should build and jtreg
  tests should pass (see comments).

  Packages built in bootstrapped[2] PPA should pass installation tests
  (see comments).

  [Where problems could occur]

  The packages need to be blocked from migration otherwise users will
  get an incomplete openjdk-21 package (missing documentation).

  The jtreg tests need to be disabled in the archive (either -1ubuntu1
  or +35-2 package) as we do not have an official jtreg port yet.

  There are no packages in the archive depending on Java 21 (except
  openjdk-21 itself).

  [1] https://launchpad.net/~vpa1977/+archive/ubuntu/openjdk-21
  [2] https://launchpad.net/~vpa1977/+archive/ubuntu/openjdk-21-bootstrapped

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