Warn and error helpers

bash

warn() { printf 'WARN: %s\n' "$*" >&2; }
die() { printf 'ERROR: %s\n' "$*" >&2; exit 1; }

Explanation

Keeps scripts readable and consistent.

Learn the surrounding workflow

Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

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Print timestamped log lines.

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Write output to terminal and log file.

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Use env to locate Bash on PATH.

Create a secure temporary file.

Retry a command several times before giving up.

Resolve the directory of the current script.