GNU xargs has a `-r, --no-run-if-empty` option but I don't think we want
to depend on GNU (thanks, MacOS).
Why? Sometimes, when you are messing with codegens, you end up with an
empty input and then it just hangs.
This document describes how you can use the scripts from hack directory
and gives a brief introduction and explanation of these scripts.
Overview
The hack directory contains many scripts that ensure continuous development of kubernetes,
enhance the robustness of the code, improve development efficiency, etc.
The explanations and descriptions of these scripts are helpful for contributors.
For details, refer to the following guidelines.
Key scripts
verify-all.sh: This script is a vestigial redirection, Please do not add "real" logic. It is equivalent to make verify.
update-all.sh: This script is a vestigial redirection, Please do not add "real" logic.
The true target of this makerule is hack/make-rules/update.sh.It is equivalent to make update.
Attention
Note that all scripts must be run from the Kubernetes root directory.
We should run hack/verify-all.sh before submitting a PR and if anything fails run hack/update-all.sh.
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