verlte() { [ "$1" = "$(printf '%s\n%s\n' "$1" "$2" | sort -V | head -n1)" ] } mkdir -p "$build_dir/bin" if command -v stack; then stack_ver=$(stack --numeric-version) else stack_ver=0 fi ghc_ver=$(ghc --numeric-version) # we need at least 1.9.4 for `stack ide packages --cabal-files --stdout` if verlte "$stack_ver" 1.9.3 && verlte 8.2.2 "$ghc_ver" then "$CI_SCRIPTS_DIR"/install-stack.sh "$build_dir/bin" PATH="$build_dir/bin:$PATH" export PATH fi