Stop using deprecated `set-output`

[atoomic]

Need to adjust set-output usage, this is currently throwing that warning

The set-output command is deprecated and will be disabled soon.
Please upgrade to using Environment Files.
For more information see:
https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

[atoomic]

Let's try to update the full upstream stack via #16

[atoomic]

This is already reported upstream and tracked via actions/toolkit#1218

Temporary Suggestion:

const os = require("os")
const fs = require("fs")

function setOutput(key, value) {
  // Temporary hack until core actions library catches up with github new recommendations
  const output = process.env['GITHUB_OUTPUT']
  fs.appendFileSync(output, `${key}=${value}${os.EOL}`)
}

Probably better to wait for a fix from upstream

[JJ]

This should be fixed already upstream, right?

[atoomic]

this is not fixed upstream view https://github.com/actions/toolkit/blob/main/packages/core/src/core.ts#L199

export function setOutput(name: string, value: any): void {
  const filePath = process.env['GITHUB_OUTPUT'] || ''
  if (filePath) {
    return issueFileCommand('OUTPUT', prepareKeyValueMessage(name, value))
  }

  process.stdout.write(os.EOL)
  issueCommand('set-output', {name}, toCommandValue(value))
}

[atoomic]

there is a case to fix it we should track actions/toolkit#1336

[rafork]

This is getting urgent. Two weeks left (maybe?):

From https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/
Starting today [October 11, 2022] runner version 2.298.2 will begin to warn you if you use the save-state or set-output commands via stdout. We are monitoring telemetry for the usage of these commands and plan to fully disable them on 31st May 2023. Starting 1st June 2023 workflows using save-state or set-output commands via stdout will fail with an error.

[atoomic]

probably consider using console.log instead

[atoomic]

this should now be fixed by 798bfcd