Pattern: Use of undefined == in place of =
Issue: -
== is used for equality comparison in C-like languages, and is also supported by bash and ksh in [ .. ] and test expressions.
sh and dash only supports = for equality comparison, so use that instead.
Example of incorrect code:
#!/bin/sh
if [ $1 == "-n" ]
then
dry_run=1
fiExample of correct code:
#!/bin/sh
if [ $1 = "-n" ]
then
dry_run=1
fi