What's with: # [ <-- needed because of Argbash There's also this bit: The square brackets in your script have to match (i.e. every opening square bracket

What's with: # [ <-- needed because of Argbash There's also this bit: The square brackets in your script have to match (i.e. every opening square bracket [ has to be followed at some point by a closing square bracket ]). There is a workaround — if you need constructs s.a. red=$'\e[0;91m', you can put the matching square bracket behind a comment, i.e. red=$'\e[0;91m' # match square bracket: ]. That kind of kludginess is a turn-off.