1

If I type rm main!(.tex|.pdf) into a bash terminal, it will delete all files that start with main but do not end in .tex or .pdf, clearing up various junk files that are strewn around by LaTeX typesetters.

The following shell script, however, doesn't do what I expect it to when placed in a file and then run

#!/bin/bash

rm main!(.tex|.pdf)

A syntax error is reported at the ( token. What gives? What's the canonical way of doing something like this as part of a bash script. Is there are more elegant way of doing this than bringin find to bear against the problem?

2

If the pattern does not work when run from a script, make sure that the extglob option is set for non-interactive use, too.

Just put

#!/usr/bin/env bash
shopt -s extglob

on top of your script after the hashbang. That way it's easy to spot. See also: Glob – Greg's Wiki

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