Implement coveralls support

.github/workflows/haskell-ci.yml

@@ -1,4 +1,6 @@
 name: Haskell-CI
+permissions:
+  contents: read
 
 on:
   push:
@@ -15,13 +17,13 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  linux:
-    name: Haskell-CI - Linux - ${{ matrix.ghc-version }}
+  test-with-cabal:
+    name: Haskell-CI - Linux - cabal - ${{ matrix.ghc-version }}
 
     strategy:
       matrix:
         ghc-version: [latest, 9.12, "9.10", 9.8, 9.6]
-        os: [ubuntu-24.04]
+        os: [ubuntu-latest]
       fail-fast: false
 
     runs-on: ${{ matrix.os }}
@@ -43,3 +45,59 @@ jobs:
         with:
           key: ${{ matrix.os }}-${{ matrix.ghc-version }}-${{ github.sha }}
           path: ~/.cabal/store
+
+
+  test-with-stack:
+    name: Stack
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest]
+        resolver: [lts-24, nightly]
+        ghc-version: [latest, 9.12, "9.10", 9.8, 9.6]
+    env:
+      STACK_ARGS: '--resolver ${{ matrix.resolver }} --system-ghc'
+    steps:
+    - uses: actions/checkout@v4
+
+    - uses: haskell-actions/setup@v2
+      id: setup-haskell-cabal
+      name: Setup Haskell
+      with:
+        ghc-version: ${{ matrix.ghc }}
+        enable-stack: true
+        stack-version: ${{ matrix.stack || 'latest' }}
+
+    - name: Cache
+      id: cache
+      uses: actions/cache@v4
+      with:
+        path: |
+          ${{ steps.setup-haskell-cabal.outputs.stack-root }}
+          .stack-work
+        key: ${{ runner.os }}-${{ matrix.resolver }}-${{ github.sha }}
+        restore-keys: |
+          ${{ runner.os }}-${{ matrix.resolver }}
+    - name: Reset modtime
+      run: |
+        set -ex
+        curl -sSL https://raw.githubusercontent.com/lehins/utils/master/haskell/git-modtime/git-modtime.hs -o git-modtime.hs
+        runhaskell -- git-modtime.hs -f .stack-work-root/tree-contents.txt
+    - name: Build
+      run: |
+        set -ex
+        stack $STACK_ARGS test --no-run-tests --bench --no-run-benchmarks --haddock --no-haddock-deps
+    - name: Test
+      env:
+        COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
+      run: |
+        set -ex
+        if [ "${{ matrix.os }}.${{ matrix.resolver }}" == "ubuntu-latest.lts-24" ] && [ -n "${COVERALLS_REPO_TOKEN}" ]; then
+          stack $STACK_ARGS test --coverage
+          stack $STACK_ARGS hpc report --all
+          curl -L https://github.com/rubik/stack-hpc-coveralls/releases/download/v0.0.7.0/shc-Linux-X64.tar.bz2 | tar xj shc
+          ./shc --repo-token="$COVERALLS_REPO_TOKEN" --partial-coverage --fetch-coverage combined custom
+        else
+          stack $STACK_ARGS test
+        fi

stack.yaml

@@ -0,0 +1,67 @@
+# This file was automatically generated by 'stack init'
+#
+# Some commonly used options have been documented as comments in this file.
+# For advanced use and comprehensive documentation of the format, please see:
+# https://docs.haskellstack.org/en/stable/configure/yaml/
+
+# A 'specific' Stackage snapshot or a compiler version.
+# A snapshot resolver dictates the compiler version and the set of packages
+# to be used for project dependencies. For example:
+#
+# snapshot: lts-23.24
+# snapshot: nightly-2025-06-15
+# snapshot: ghc-9.8.4
+#
+# The location of a snapshot can be provided as a file or url. Stack assumes
+# a snapshot provided as a file might change, whereas a url resource does not.
+#
+# snapshot: ./custom-snapshot.yaml
+# snapshot: https://example.com/snapshots/2024-01-01.yaml
+snapshot:
+  url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/24/14.yaml
+
+# User packages to be built.
+# Various formats can be used as shown in the example below.
+#
+# packages:
+# - some-directory
+# - https://example.com/foo/bar/baz-0.0.2.tar.gz
+#   subdirs:
+#   - auto-update
+#   - wai
+packages:
+- .
+# Dependency packages to be pulled from upstream that are not in the snapshot.
+# These entries can reference officially published versions as well as
+# forks / in-progress versions pinned to a git hash. For example:
+#
+# extra-deps:
+# - acme-missiles-0.3
+# - git: https://github.com/commercialhaskell/stack.git
+#   commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+#
+# extra-deps: []
+
+# Override default flag values for project packages and extra-deps
+# flags: {}
+
+# Extra package databases containing global packages
+# extra-package-dbs: []
+
+# Control whether we use the GHC we find on the path
+# system-ghc: true
+#
+# Require a specific version of Stack, using version ranges
+# require-stack-version: -any # Default
+# require-stack-version: ">=3.7"
+#
+# Override the architecture used by Stack, especially useful on Windows
+# arch: i386
+# arch: x86_64
+#
+# Extra directories used by Stack for building
+# extra-include-dirs: [/path/to/dir]
+# extra-lib-dirs: [/path/to/dir]
+#
+# Allow a newer minor version of GHC than the snapshot specifies
+# compiler-check: newer-minor