Bash Strict Mode

19 days ago

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Bash strict mode makes scripts more robust, reliable, and maintainable by causing them to fail immediately on errors.
Key components of bash strict mode include `set -euo pipefail` and `IFS=$'\n\t'`.
`set -e` causes the script to exit immediately if any command fails.
`set -u` treats references to undefined variables as errors.
`set -o pipefail` ensures that pipeline failures are not masked by the success of later commands.
Setting `IFS` to `$'\n\t'` improves word splitting behavior in loops and arrays.
Common issues and solutions when using strict mode include handling sourced documents, positional parameters, and commands expected to fail.
Essential clean-up can be managed using bash exit traps.
Short-circuiting expressions can lead to unexpected exit codes, especially when they are the last line of a script.

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