The add-path command is deprecated and will be disabled soon

[jon-groovy]

This action has started to throw the following warning

Warning: The `add-path` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands/

Which seems to be triggered here

setup-kustomize/dist/index.js

Lines 5436 to 5439 in d6406c9

	function addPath(inputPath) {
	command_1.issueCommand('add-path', {}, inputPath);
	process.env['PATH'] = `${inputPath}${path.delimiter}${process.env['PATH']}`;
	}

Specifically line 5437

The changelog recommendation is to updating $GITHUB_PATH

https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-commands-for-github-actions#adding-a-system-path

[imranismail]

This should be fixed in master, could you try again with v1 tag

[jon-groovy]

This is indeed fixed with v1 tag