termux_download_deb: check that Packages exist before reading hash

scripts/build/termux_download_deb.sh

@@ -1,24 +1,27 @@
 termux_download_deb() {
-	local package=$1
-	local package_arch=$2
-	local version=$3
-	local deb_file=${package}_${version}_${package_arch}.deb
+	local PACKAGE=$1
+	local PACKAGE_ARCH=$2
+	local VERSION=$3
+	local DEB_FILE=${PACKAGE}_${VERSION}_${PACKAGE_ARCH}.deb
+	PKG_HASH=""
 	for idx in $(seq ${#TERMUX_REPO_URL[@]}); do
 		local TERMUX_REPO_NAME=$(echo ${TERMUX_REPO_URL[$idx-1]} | sed -e 's%https://%%g' -e 's%http://%%g' -e 's%/%-%g')
 		local PACKAGE_FILE_PATH="${TERMUX_REPO_NAME}-${TERMUX_REPO_DISTRIBUTION[$idx-1]}-${TERMUX_REPO_COMPONENT[$idx-1]}-Packages"
-		read -d "\n" PKG_PATH PKG_HASH <<<$(./scripts/get_hash_from_file.py "${TERMUX_COMMON_CACHEDIR}-$arch/$PACKAGE_FILE_PATH" $package $version)
-		if ! [ "$PKG_HASH" = "" ]; then
+		if [ -f "${TERMUX_COMMON_CACHEDIR}-${PACKAGE_ARCH}/${PACKAGE_FILE_PATH}" ]; then
+			read -d "\n" PKG_PATH PKG_HASH <<<$(./scripts/get_hash_from_file.py "${TERMUX_COMMON_CACHEDIR}-${PACKAGE_ARCH}/$PACKAGE_FILE_PATH" $PACKAGE $VERSION)
+			if [ ! -z "$PKG_HASH" ]; then
 				if [ ! "$TERMUX_QUIET_BUILD" = true ]; then
-				echo "Found $package in ${TERMUX_REPO_URL[$idx-1]}/dists/${TERMUX_REPO_DISTRIBUTION[$idx-1]}"
+					echo "Found $PACKAGE in ${TERMUX_REPO_URL[$idx-1]}/dists/${TERMUX_REPO_DISTRIBUTION[$idx-1]}"
 				fi
 				break
 			fi
+		fi
 	done
 	if [ "$PKG_HASH" = "" ]; then
 		return 1
 	else
 		termux_download ${TERMUX_REPO_URL[$idx-1]}/${PKG_PATH} \
-				$TERMUX_COMMON_CACHEDIR-$package_arch/${deb_file} \
+				$TERMUX_COMMON_CACHEDIR-$PACKAGE_ARCH/${DEB_FILE} \
 				$PKG_HASH
 		return 0
 	fi