Latest revision as of 14:25, 14 October 2024

Haskell GHC 9.6 and Stackage LTS 22

Summary

Update the GHC Haskell compiler from major version 9.4 to 9.6 and Haskell packages from Stackage LTS 21 to LTS 22 versions.

Owner

Name: Jens Petersen
Email: <petersen@redhat.com>

Current status

Targeted release: Fedora Linux 41
Last updated: 2024-10-14
Announced
Discussion thread
FESCo issue: #3133
Tracker bug: #2258070
Release notes tracker: #138

Detailed Description

For Fedora 41, the main GHC Haskell compiler package will be updated from version 9.4.5 to the latest stable 9.6.6 release (rebasing the ghc package from the ghc9.6 package). Along with this, Haskell packages in Stackage (the stable Haskell source package distribution) will be updated from the versions in LTS 21 to latest LTS 22 release. Haskell packages not in Stackage will be updated to the latest appropriate version in the upstream Hackage package repository.

Feedback

Benefit to Fedora

Fedora users will have the latest stable Haskell compiler release, package tools, and current Haskell packages from latest Stackage LTS.

GHC 9.6.6 is the latest current stable version of GHC with various enhancements and fixes (see the release notes linked in the Documentation section for more details about new features and improvements in 9.6).

Scope

Proposal owners:
- update rawhide ghc9.4 is build against itself [done]
- rebase ghc to 9.6.6 and obsolete ghc9.6 [done]
- refresh packagings with the latest cabal-rpm release if needed [done before mass rebuild]
- update packages to latest Stackage LTS 22 versions using cabal-rpm [used lts-22.29]
- build all the packages in a Koji sidetag repo in dependency order using fbrnch [done]
- push the sidetag through Bodhi to rawhide [done]
- obsolete deprecated packages [in progress]
- build ghc9.10 using the new Haskell packages [in progress]

Other developers: no actions should be needed

Release engineering: #Releng issue number

Policies and guidelines: N/A (not needed for this Change)

Trademark approval: N/A (not needed for this Change)

Alignment with Community Initiatives: N/A

Upgrade/compatibility impact

Any dropped packages will have obsoletes added. Otherwise there should not be any direct upgrade impact.

Users' Haskell projects will get built with ghc-9.6 when they next build them and might need some minor code tweaks (see the release notes linked below).

How To Test

install ghc and cabal-install
install pandoc, ShellCheck, ghcid, git-annex, hadolint, stack, xmonad, Agda
install ghc-*-devel or ghc-*-prof or ghc-*-doc
cabal-rpm builddep <favouritepackage>; cabal install <favouritepackage>
install ghc8.10, ghc9.0, ghc9.2, ghc9.4, or ghc*devel
test upgrades of F40 Haskell packages to F41

User Experience

Users will have the most recent stable major version of ghc and Haskell libraries and tools available to them. This makes it easier to build the latest versions of Haskell projects.

In particular cabal-install will also be updated from 3.8 to 3.10, pandoc will be updated to 3.1.11, and stack to 2.15.

Dependencies

Contingency Plan

Contingency mechanism:
- Change owner will drop the new builds and revert dist-git back to the versions in F40
Contingency deadline: Beta Freeze
Blocks release? No

Documentation

Release Notes

GHC has been updated to major version 9.6 and Haskell packages to Stackage LTS 22 versions.

@@ Line 19: / Line 19: @@
 == Current status ==
-[[Category:ChangeAcceptedF40]]
+[[Category:ChangeAcceptedF41]]
 <!-- When your change proposal page is completed and ready for review and announcement -->
 <!-- remove Category:ChangePageIncomplete and change it to Category:ChangeReadyForWrangler -->
@@ Line 29: / Line 29: @@
 <!-- [[Category:SystemWideChange]] -->
-* Targeted release: [https://docs.fedoraproject.org/en-US/releases/f40/ Fedora Linux 40]
+* Targeted release: [https://docs.fedoraproject.org/en-US/releases/f41/ Fedora Linux 41]
 * Last updated: <!-- this is an automatic macro — you don't need to change this line -->  {{REVISIONYEAR}}-{{REVISIONMONTH}}-{{REVISIONDAY2}}
 <!-- After the change proposal is accepted by FESCo, tracking bug is created in Bugzilla and linked to this page
@@ Line 41: / Line 41: @@
 * FESCo issue: [https://pagure.io/fesco/issue/3133 #3133]
 * Tracker bug: [https://bugzilla.redhat.com/show_bug.cgi?id=2258070 #2258070]
-* Release notes tracker: <will be assigned by the Wrangler>
+* Release notes tracker: [https://gitlab.com/fedora/docs/fedora-linux-documentation/release-notes/-/issues/138 #138]
 == Detailed Description ==
-For Fedora 40, the main [https://www.haskell.org/ghc/ GHC] Haskell compiler package will be updated from version [https://www.haskell.org/ghc/download_ghc_9_4_5.html 9.4.5] to the latest stable [https://www.haskell.org/ghc/download_ghc_9_6_4.html 9.6.4] or newer bugfix release (rebasing the [https://src.fedoraproject.org/rpms/ghc/ ghc] package with the [https://src.fedoraproject.org/rpms/ghc9.6/ ghc9.6] package).
+For Fedora 41, the main [https://www.haskell.org/ghc/ GHC] Haskell compiler package will be updated from version [https://www.haskell.org/ghc/download_ghc_9_4_5.html 9.4.5] to the latest stable [https://www.haskell.org/ghc/download_ghc_9_6_6.html 9.6.6] release (rebasing the [https://src.fedoraproject.org/rpms/ghc/ ghc] package from the [https://src.fedoraproject.org/rpms/ghc9.6/ ghc9.6] package).
 Along with this, Haskell packages in [https://www.stackage.org Stackage] (the stable Haskell source package distribution) will be updated from the versions in [https://www.stackage.org/lts-21 LTS 21] to latest [https://www.stackage.org/lts-22 LTS 22] release.
 Haskell packages not in Stackage will be updated to the latest appropriate version in the upstream [https://hackage.haskell.org Hackage] package repository.
@@ Line 54: / Line 54: @@
 Fedora users will have the latest stable Haskell compiler release, package tools, and current Haskell packages from latest Stackage LTS.
-GHC 9.6.4 is the latest current stable version of GHC with various enhancements and fixes (see the release notes linked in the Documentation section for more details about new features and improvements in 9.6).
+GHC 9.6.6 is the latest current stable version of GHC with various enhancements and fixes (see the release notes linked in the Documentation section for more details about new features and improvements in 9.6).
 == Scope ==
 * Proposal owners:
-** update rawhide ghc9.4 is build against itself
+** update rawhide ghc9.4 is build against itself [done]
-** rebase ghc to 9.6.4
+** rebase ghc to 9.6.6 and obsolete ghc9.6 [done]
-** refresh packagings with the latest cabal-rpm release if needed
+** refresh packagings with the latest cabal-rpm release if needed [done before mass rebuild]
-** update packages to latest [https://www.stackage.org/lts-22 Stackage LTS 22] versions using cabal-rpm
+** update packages to latest [https://www.stackage.org/lts-22 Stackage LTS 22] versions using cabal-rpm [used lts-22.29]
-** build all the packages in a Koji sidetag repo in dependency order using fbrnch
+** build all the packages in a Koji sidetag repo in dependency order using fbrnch [done]
-** push the sidetag through Bodhi to rawhide
+** push the sidetag through Bodhi to rawhide [done]
-** deal with obsoleting ghc9.6 if needed
+** obsolete deprecated packages [in progress]
+** build ghc9.10 using the new Haskell packages [in progress]
 * Other developers: no actions should be needed <!-- REQUIRED FOR SYSTEM WIDE CHANGES -->
@@ Line 94: / Line 95: @@
 * cabal-rpm builddep <favouritepackage>; cabal install <favouritepackage>
 * install ghc8.10, ghc9.0, ghc9.2, ghc9.4, or ghc*devel
-* test upgrades of F39 Haskell packages to F40
+* test upgrades of F40 Haskell packages to F41
 == User Experience ==
@@ Line 100: / Line 101: @@
 This makes it easier to build the latest versions of Haskell projects.
-In particular `cabal-install` will also be updated from 3.8 to 3.10, `pandoc` will be updated to 3.1, and `stack` to 2.13.
+In particular `cabal-install` will also be updated from 3.8 to 3.10, `pandoc` will be updated to 3.1.11, and `stack` to 2.15.
 == Dependencies ==
@@ Line 112: / Line 113: @@
 <!-- If you cannot complete your feature by the final development freeze, what is the backup plan?  This might be as simple as "Revert the shipped configuration".  Or it might not (e.g. rebuilding a number of dependent packages).  If you feature is not completed in time we want to assure others that other parts of Fedora will not be in jeopardy.  -->
 * Contingency mechanism:
-** Change owner will drop the new builds and revert dist-git back to the versions in F39
+** Change owner will drop the new builds and revert dist-git back to the versions in F40
 * Contingency deadline: Beta Freeze
 <!-- Does finishing this feature block the release, or can we ship with the feature in incomplete state? -->
@@ Line 118: / Line 119: @@
 == Documentation ==
-* https://downloads.haskell.org/~ghc/9.6.4/docs/html/users_guide/9.6.1-notes.html
+* https://downloads.haskell.org/~ghc/9.6.6/docs/users_guide/9.6.1-notes.html
+* https://gitlab.haskell.org/ghc/ghc/-/wikis/migration/9.6
 == Release Notes ==
+GHC has been updated to major version 9.6 and Haskell packages to Stackage LTS 22 versions.
 <!-- The Fedora Release Notes inform end-users about what is new in the release.  Examples of past release notes are at https://docs.fedoraproject.org/en-US/fedora/latest/release-notes/ -->
 <!-- The release notes also help users know how to deal with platform changes such as ABIs/APIs, configuration or data file formats, or upgrade concerns.  If there are any such changes involved in this change, indicate them here.  A link to upstream documentation will often satisfy this need.  This information forms the basis of the release notes edited by the documentation team and shipped with the release.

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