unwrap_or eagerly evaluates the or case, so in WASM we were getting the "no current directory" error even when we pass Some working_dir, since current_dir() was returning an Err.
By switching this to a match the None case is only evaluated if needed, and by passing working_dir we avoid evaluating current_dir().
unwrap_oreagerly evaluates the or case, so in WASM we were getting the "no current directory" error even when we pass Someworking_dir, sincecurrent_dir()was returning anErr.By switching this to a match the
Nonecase is only evaluated if needed, and by passingworking_dirwe avoid evaluatingcurrent_dir().