#!/usr/bin/env nix-shell
#!nix-shell -i bash -p bash ripgrep nix

if [ "$1" == "head" ]; then
	ADDED_MAINPROGRAMS=$(git diff-tree --no-commit-id --name-only -r HEAD)
elif [ "$1" == "wip" ]; then
  ADDED_MAINPROGRAMS=$(git diff --name-only --cached)
else
	echo "USAGE: $0 [ head | wip ]"
	exit 1
fi

trap "exit 0" SIGINT

TOTAL_COUNT=$(echo $ADDED_MAINPROGRAMS | wc -w)
COUNTER=0
for FILE in $ADDED_MAINPROGRAMS; do
	PACKAGE_PATH=$(dirname "$FILE")
	PACKAGE="${PACKAGE_PATH%/}"
	PACKAGE="${PACKAGE##*/}"

	COUNTER=$((COUNTER + 1))

	echo "($COUNTER/$TOTAL_COUNT) Verifying mainProgram of: $PACKAGE"

	NIXPKGS_ALLOW_UNFREE=1 nix build ".#$PACKAGE" --option builders '' --impure || {
		echo "$PACKAGE" >> missing_main_program.txt && continue;
	}

	MAIN_PROGRAM=$(rg "mainProgram = \"(.+?)\";" --replace "\$1" --only-matching --no-line-number "$FILE" | xargs)

	echo "mainProgram: $PACKAGE"
	if ! {
		{
			[ -d "result/bin" ] && [ "$(ls result/bin | xargs)" == "$MAIN_PROGRAM" ];
		} || {
			[ -d "result-bin/bin" ] && [ "$(ls result-bin/bin | xargs)" == "$MAIN_PROGRAM" ];
		};
	}; then
	  echo "mainProgram doesn't match contents:"
 		ls result/bin 2>/dev/null || true
 		ls result-bin/bin 2>/dev/null || true
		echo "$PACKAGE" >> missing_main_program.txt
	fi

	rm result* || true
done