post-to-smee.js

const core = require('@actions/core')
const { context } = require('@actions/github')
const fetch = require('node-fetch')

module.exports = async function postToSmee () {
  // Serialize payload object
  const payload = {
    ...context.payload,
    'smee-action': {
      action: context.action,
      actor: context.actor,
      event: process.env.GITHUB_EVENT_NAME,
      sha: context.sha,
      ref: context.ref,
      workflow: context.workflow,
      run_id: process.env.GITHUB_RUN_ID
    }
  }

  // Serialize headers
  const headers = {
    'X-GitHub-Event': process.env.GITHUB_EVENT_NAME,
    // Used to prevent duplication
    'X-GitHub-Delivery': process.env.GITHUB_RUN_ID
  }
  // Get the channel id
  const channel = (
    // Use the provided `channel` input
    core.getInput('channel') ||
    // Default to `owner-repo`
    `${context.repo.owner}-${context.repo.repo}`
  )

  // Send the data to Smee
  const url = `https://smee.io/${channel}`
  await fetch(url, {
    method: 'POST',
    body: JSON.stringify(payload),
    headers: {
      ...headers,
      'Content-Type': 'application/json'
    }
  })

  core.info(`Done! Check it out at ${url}.`)
  core.info('Remember that Smee only shows payloads received while your browser tab is open!')
  core.setOutput('url', url)
}