CI: constraint-set bytestring-0.12

Author: andreasabel

.github/workflows/haskell-ci.yml

@@ -231,6 +231,7 @@ jobs:
           if [ $((HCNUMVER >= 80200)) -ne 0 ] ; then echo "package regex-tdfa" >> cabal.project ; fi
           if [ $((HCNUMVER >= 80200)) -ne 0 ] ; then echo "    ghc-options: -Werror=missing-methods" >> cabal.project ; fi
           cat >> cabal.project <<EOF
+          allow-newer: bytestring
           EOF
           $HCPKG list --simple-output --names-only | perl -ne 'for (split /\s+/) { print "constraints: $_ installed\n" unless /^(Cabal|regex-tdfa|text)$/; }' >> cabal.project.local
           cat cabal.project
@@ -272,10 +273,10 @@ jobs:
       - name: prepare for constraint sets
         run: |
           rm -f cabal.project.local
-      - name: constraint set mtl-2.3
+      - name: constraint set bytestring-0.12
         run: |
-          if [ $((HCNUMVER >= 80600)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='mtl >= 2.3' --constraint='transformers >= 0.6' --dependencies-only -j2 all ; fi
-          if [ $((HCNUMVER >= 80600)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='mtl >= 2.3' --constraint='transformers >= 0.6' all ; fi
+          if [ $((HCNUMVER >= 80000)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='bytestring >= 0.12' --dependencies-only -j2 all ; fi
+          if [ $((HCNUMVER >= 80000)) -ne 0 ] ; then $CABAL v2-build $ARG_COMPILER --disable-tests --disable-benchmarks --constraint='bytestring >= 0.12' all ; fi
       - name: save cache
         uses: actions/cache/save@v3
         if: always()

cabal.haskell-ci

@@ -2,9 +2,31 @@ branches: master
 
 installed: +all -text -Cabal
 
-constraint-set mtl-2.3
-  ghc: >= 8.6
-  constraints: mtl >= 2.3, transformers >= 0.6
-
 -- doctest-parallel requires base >= 4.10
-tests: >= 8.2
+tests: >= 8.2
+
+constraint-set bytestring-0.12
+  -- bytestring-0.12 requires base >=4.9 (GHC 8.0)
+  ghc: >= 8.0
+  constraints: bytestring >= 0.12
+  --
+  -- The following is silently ignored here:
+  --
+  -- raw-project
+  --   allow-newer: bytestring
+  --
+  -- Cannot build tests with newer bytestring because doctest-parallel relies on non-upgradeable ghc library
+  --
+  -- tests: True
+  -- run-tests: True
+
+-- The following is meant to be for constraint-set bytestring-0.12 only,
+-- but there is currently no way to enable `allow-newer: bytestring`
+-- just for the constraint set.
+--
+-- Since core library `bytestring` is constrained to `installed`,
+-- it is not harmful to allow newer `bytestring` in the default runs
+-- as well---it will have no effect there.
+--
+raw-project
+  allow-newer: bytestring