Update to use GitHub's environment files

[sormuras]

setup-java/src/Download.java

Line 221 in 2e3562c

System.out.printf("::set-output name=%s::%s%n", name, value);

Action and workflow authors who are using save-state or set-output via stdout should update to use the new environment files.

https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

[derlin]

Are you suggesting to modify this line with the following ?

System.out.printf("echo \"%s=%s\" >> $GITHUB_OUTPUT%n", name, value); 

Or do you see other changes that are necessary ?

(I am interested in taking this issue)

[sormuras]

Yes, as far as I can tell, it's the only line that requires a change:

Your proposed change woudn't work on Windows (cmd.exe nor PowerShell), would it?
Perhaps using NIO's Files.write[String]() is platform-agnostic solution. Something like:

var output = Path.of(System.env...);
Files.write(
    output,
    List.of(name + "=" + value),
    StandardCharsets.UTF_8,
    StandardOpenOption.CREATE,
    StandardOpenOption.APPEND,
    StandardOpenOption.WRITE);

Before you hack away and create a pull request, I first need to clarify whether and how contributions can be submitted.

[sormuras]

Starting today runner version 2.298.2 will begin to warn you if you use the save-state or set-output commands via stdout.

Warnings are now in place.

[sormuras]

@derlin I am taking care of this issue because I want to get rid of the warnings as soon as possible. That's why I removed the good first issue label and filed:

• Add contributing guidelines #46

[sormuras]

Outputs are empty?!

[sormuras]

Fixed by e81158a