How to intercept and react to non-zero exits in bash
source link: https://www.peterbe.com/plog/how-to-intercept-and-react-non-zero-exits-in-bash
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Inside a step in a GitHub Action, I want to run a script, and depending on the outcome of that, maybe do some more things. Essentially, if the script fails, I want to print some extra user-friendly messages, but the whole Action should still fail with the same exit code.
In pseudo-code, this is what I want to achieve:
exit_code = that_other_script()
if exit_code > 0:
print("Extra message if it failed")
exit(exit_code)
So here's how to do that with bash:
# If it's not the default, make it so that it proceeds even if
# any one line exits non-zero
set +e
./script/update-internal-links.js --check
exit_code=$?
if [ $exit_code != 0 ]; then
echo "Extra message here informing that the script failed"
exit $exit_code
fi
The origin, for me, at the moment, was that I had a GitHub Action where it calls another script that might fail. If it fails, I wanted to print out a verbose extra hint to whoever looks at the output. Steps in GitHub Action runs with set -e by default I think, meaning that if anything goes wrong in the step it leaves the step and runs those steps with if: ${{ failure() }} next.
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