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mpdroog/once.sh

Created August 31, 2021 13:48
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Ensure only one instance at the same time
Raw
once.sh
#!/usr/bin/env bash
# Using lock-file to ensure only one instance can be running
# at the same time.
# DevNote: The trap is used to ensure we ALWAYS remove the lock upon completion
set -x
set -e
if ! mkdir /tmp/MYSCRIPT.lock; then
printf "MYSCRIPT already running.\n" >&2
exit 1
fi
trap 'rm -rf /tmp/MYSCRIPT.lock' EXIT
/path/to/original.file.js
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