Make shell a source script instead

shell

@@ -1,15 +1,7 @@
 #!/bin/bash
-set -e
 SCRIPT_DIR="$(dirname "$(realpath -s "$BASH_SOURCE")")"
 cd "$SCRIPT_DIR"
 ARGS="$@"
 export PATH="$SCRIPT_DIR/path:$PATH"
 export PS1="\$? $PS1"
-source ./env
-
-if [ "$ARGS" == "" ]; then
-	echo "-- project shell --"
-	exec bash
-else
-	exec bash -c "$ARGS"
-fi
+source ./env