Add a markdown-doctest CI

Author: adithyaov

.github/workflows/markdown-doctest.yml

@@ -0,0 +1,41 @@
+name: Markdown Doctest
+
+on: pull_request
+
+jobs:
+  markdown-doctest:
+
+    runs-on: ubuntu-latest
+
+    steps:
+
+    - name: Download ghc
+      run: |
+        GHCUP_VER=0.1.20.0
+        curl -sL -o ./ghcup https://downloads.haskell.org/~ghcup/$GHCUP_VER/x86_64-linux-ghcup-$GHCUP_VER
+        chmod +x ./ghcup
+        GHCVER=9.8.1
+        ./ghcup install ghc $GHCVER
+        ./ghcup set ghc $GHCVER
+        cabal update
+
+    - uses: actions/cache@v4
+      name: Cache ~/.cabal
+      with:
+        path: |
+            ~/.cabal
+        # Bump the key version to clear the cache
+        key: cache-v2
+
+    - name: Checkout the current branch
+      uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+
+    - name: Create env files for ghci
+      run: cabal build streamly --write-ghc-environment-files=always
+
+    - name: Run markdown-doctest
+      run: |
+        cabal install markdown-doctest --project-file=cabal.project.markdown-doctest --installdir=./ --overwrite-policy=always
+        find . -type f -name "*.md" -print0 | while IFS= read -r -d '' file; do echo "CMD: ./markdown-doctest $file" && ./markdown-doctest "$file" || break; done

.packcheck.ignore

@@ -3,6 +3,7 @@
 .github/workflows/haskell.yml
 .github/workflows/regression-check.yml
 .github/workflows/packdiff.yml
+.github/workflows/markdown-doctest.yml
 .gitignore
 .hlint.ignore
 .hlint.yaml
@@ -23,6 +24,7 @@ cabal.project.hpc-coveralls
 cabal.project.O0
 cabal.project.report
 cabal.project.packdiff
+cabal.project.markdown-doctest
 cabal.project.streamly
 cabal.project.Werror
 cabal.project.Werror-nocode

cabal.project.markdown-doctest

@@ -0,0 +1,4 @@
+source-repository-package
+  type: git
+  location: https://github.com/composewell/markdown-doctest.git
+  tag: 05dcf5f03128c49b66cf7c7778f567da1990014c