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#!/usr/bin/env bash
CABAL="${CABAL:-cabal}"
GHC="${GHC:-ghc}"
CABFLAGS=("--with-compiler=$GHC" "--disable-documentation" "--disable-profiling" "--disable-library-profiling" $CABFLAGS)
( $GHC --info | grep -s '("Support SMP","YES")' > /dev/null ) || CABFLAGS+=("--constraint=hadrian -threaded")
# It is currently more robust to pass Cabal an absolute path to the project file.
PROJ="$PWD/hadrian/cabal.project"
set -euo pipefail
if ! [ -f "$PROJ" ]; then
echo "Current working directory must be GHC's top-level folder"
exit 2
fi
if ! type "$CABAL" > /dev/null; then
echo "Please make sure 'cabal' is in your PATH"
exit 2
fi
CABVERSTR=$("$CABAL" --numeric-version)
CABVER=( ${CABVERSTR//./ } )
if [ "${CABVER[0]}" -gt 2 -o "${CABVER[0]}" -eq 2 -a "${CABVER[1]}" -ge 2 ];
then
"$CABAL" --project-file="$PROJ" new-build "${CABFLAGS[@]}" -j exe:hadrian
# use new-exec instead of new-run to make sure that the build-tools (alex & happy) are in PATH
"$CABAL" --project-file="$PROJ" new-exec "${CABFLAGS[@]}" hadrian -- \
--directory "$PWD" \
"$@"
else
echo "Cabal version is too old; you need at least cabal-install 2.2"
exit 2
fi
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