Merge pull request #11966 from haskell/three-years

Narrow GHC support window from 5 to 3 years

Author: mergify[bot]

.github/workflows/validate.yml

@@ -65,43 +65,8 @@ jobs:
             "9.10.3",
             "9.8.4",
             "9.6.7",
-            "9.4.8",
-            "9.2.8",
-            "9.0.2",
-            "8.10.7",
-            "8.8.4",
+            "9.4.8"
           ]
-        exclude:
-          # ghc-pkg.exe starts silently failing for a few hours
-          - sys:
-              { os: windows-latest, shell: "C:/msys64/usr/bin/bash.exe -e {0}" }
-            ghc: "9.2.8"
-          # Throws fatal "cabal-tests.exe: fd:8: hGetLine: end of file" exception
-          # even with --io-manager=native
-          - sys:
-              { os: windows-latest, shell: "C:/msys64/usr/bin/bash.exe -e {0}" }
-            ghc: "9.0.2"
-          # corrupts GHA cache or the fabric of reality itself, see https://github.com/haskell/cabal/issues/8356
-          - sys:
-              { os: windows-latest, shell: "C:/msys64/usr/bin/bash.exe -e {0}" }
-            ghc: "8.10.7"
-          # lot of segfaults caused by ghc bugs
-          - sys:
-              { os: windows-latest, shell: "C:/msys64/usr/bin/bash.exe -e {0}" }
-            ghc: "8.8.4"
-          # ghc before 8.10.5 doesn't run on AArch64
-          # 9.0.2 suffers from https://gitlab.haskell.org/ghc/ghc/-/issues/20592
-          # 8.10.7 throws asm errors in hashable's cbits suggesting the runner doesn't
-          # support a CPU extension for hardware SHA; may be fixable with flags
-          - sys:
-              { os: macos-latest, shell: bash }
-            ghc: "9.0.2"
-          - sys:
-              { os: macos-latest, shell: bash }
-            ghc: "8.10.7"
-          - sys:
-              { os: macos-latest, shell: bash }
-            ghc: "8.8.4"
     defaults:
       run:
         shell: ${{ matrix.sys.shell }}
@@ -271,7 +236,7 @@ jobs:
     strategy:
       matrix:
         extra-ghc:
-          ["8.6.5", "8.4.4", "8.2.2", "8.0.2"]
+          ["9.2.8", "9.0.2", "8.10.7", "8.8.4", "8.6.5", "8.4.4", "8.2.2", "8.0.2"]
           ## GHC 7.10.3 does not install on ubuntu-latest with ghcup.
           ## Older GHCs are not supported by ghcup in the first place.
       fail-fast: false

Cabal-hooks/Cabal-hooks.cabal

@@ -29,7 +29,7 @@ library
   build-depends:
     , Cabal-syntax    >= 3.17      && < 3.18
     , Cabal           >= 3.17      && < 3.18
-    , base            >= 4.13      && < 5
+    , base            >= 4.17      && < 5
     , containers      >= 0.5.0.0   && < 0.9
     , transformers    >= 0.5.6.0   && < 0.7
 

Cabal-syntax/Cabal-syntax.cabal

@@ -29,7 +29,7 @@ library
 
   build-depends:
     , array      >= 0.4.0.1  && < 0.6
-    , base       >= 4.13     && < 5
+    , base       >= 4.17     && < 5
     , binary     >= 0.8.1    && < 0.9
     , bytestring >= 0.10.4.0 && < 0.13
     , containers >= 0.5.2    && < 0.9

Cabal-tests/Cabal-tests.cabal

@@ -56,7 +56,7 @@ test-suite unit-tests
   main-is:          UnitTests.hs
   build-depends:
     , array
-    , base                >=4.13    && <5
+    , base                >=4.17    && <5
     , bytestring
     , Cabal
     , Cabal-described

Cabal/Cabal.cabal

@@ -41,7 +41,7 @@ library
   build-depends:
     , Cabal-syntax ^>= 3.17
     , array      >= 0.4.0.1  && < 0.6
-    , base       >= 4.13     && < 5
+    , base       >= 4.17     && < 5
     , bytestring >= 0.10.8   && < 0.13
     , containers >= 0.5.8.2  && < 0.9
     , deepseq    >= 1.3.0.1  && < 1.7

README.md

@@ -115,17 +115,17 @@ Got questions? Ask in [Haskell Matrix](https://matrix.to/#/#haskell:matrix.org)
 Support window
 --------------
 
-Our GHC support window is five years ([reference](https://gitlab.haskell.org/ghc/ghc/-/wikis/GHC%20Status#all-released-ghc-versions))
+Our GHC support window is three years ([reference](https://gitlab.haskell.org/ghc/ghc/-/wikis/GHC%20Status#all-released-ghc-versions))
 for both the Cabal library and `cabal-install`.  That is:
 
 * Cabal library must be buildable out-of-the-box against the
-  boot libraries shipped with GHC, for any GHC released in the past five
+  boot libraries shipped with GHC, for any GHC released in the past three
   years from Cabal library release date.
 * `cabal-install` should be buildable with `bootstrap/bootstrap.py`
-  script, for any GHC released in the past five years from `cabal-install`
+  script, for any GHC released in the past three years from `cabal-install`
   release date.
 * `cabal-install` should be able to drive the most recent minor version of
-  any GHCs major version released in the past five years from `cabal-install`
+  any GHCs major version released in the past three years from `cabal-install`
   release date.
   In this context, "drive" means `cabal-install` will work with the Cabal
   library (usually but not always the one that came with the ghc version)
@@ -135,7 +135,7 @@ Self-upgrade to the latest version (i.e. `cabal install cabal-install`)
 must work with all versions of `cabal-install` released during the last
 three years.
 
-Cabal maintainers try to support GHC versions older than five years
+Cabal maintainers try to support GHC versions older than three years
 on a minimal-effort basis.
 
 Build for hacking and contributing to cabal

bootstrap/cabal-bootstrap-gen.cabal

@@ -9,7 +9,7 @@ executable cabal-bootstrap-gen
   main-is:          Main.hs
   build-depends:
     , aeson                  ^>=1.5.2.0  || ^>=2.0.3.0 || ^>=2.1.0.0 || ^>=2.2.0.0
-    , base                    >=4.12.0.0 && < 5
+    , base                    >=4.17.0.0 && < 5
     , bytestring              >=0.10.8.2 && <0.13
     , Cabal                  ^>=3.14.1.0 || ^>=3.16.0.0
     , Cabal-syntax           ^>=3.14.1.0 || ^>=3.16.0.0