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Add SC2339: warn about ** when globstar is not enabled - #3588
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Fixes #3542
Summary
Adds ShellCheck warning SC2339 for Bash scripts that use
**withoutglobstarbeing enabled.Motivation
Without the
globstarshell option,**does not provide recursive pathname expansion. This warning helps identify cases where a pattern may not behave as intended.Implementation
**glob patterns whenglobstaris definitely disabled.globstarstate changes throughshoptcommands.globstarstate is unknown, reducing false positives.