Disable haddock for nightly stack snapshot on Windows

This works around #2200

Author: avdv

start

@@ -201,6 +201,8 @@ case "${MODE}" in
         ;;
 esac > "${ZLIB_BUILD_FILE}"
 
+WITH_HADDOCK=True
+
 case "$GHC_VERSION" in
     8.10.*)
         SNAPSHOT=lts-18.28
@@ -218,6 +220,12 @@ case "$GHC_VERSION" in
         SNAPSHOT=lts-22.22
         ;;
     *)
+        # zlib >= 0.7.1.0 depends on zlib-clib on Windows (unless using pkg-config), since zlib-clib is
+        # a C only cabal library that does not produce any haddock this results in an error.
+        # See https://github.com/tweag/rules_haskell/issues/2200
+        case "$( uname )" in
+            WindowsNT | MINGW* | MSYS* ) WITH_HADDOCK=False ;;
+        esac
         SNAPSHOT=nightly-2024-05-24
         stderr "warning: unsupported GHC version: ${GHC_VERSION}, using stack resolver ${SNAPSHOT}"
 esac
@@ -273,6 +281,7 @@ stack_snapshot(
 
     # disable calling pkg-config
     flags = {"zlib": ["-pkg-config"]},
+    haddock = $WITH_HADDOCK,
 
     # LTS snapshot published for ghc-${GHC_VERSION} (default version used by rules_haskell)
     snapshot = "$SNAPSHOT",