This action extends actions/github-script and makes it easy to quickly write a script in your workflow that uses the GitHub API and the workflow run context then posts comment to Pull Request and GitHub Summary.

To use this action, provide an input named script that contains the body of an asynchronous JavaScript function call. The following arguments will be provided:

• github A pre-authenticated octokit/rest.js client with pagination plugins
• context An object containing the context of the workflow run
• core A reference to the @actions/core package
• glob A reference to the @actions/glob package
• io A reference to the @actions/io package
• exec A reference to the @actions/exec package
• require A proxy wrapper around the normal Node.js require to enable requiring relative paths (relative to the current working directory) and requiring npm packages installed in the current working directory. If for some reason you need the non-wrapped require, there is an escape hatch available: __original_require__ is the original value of require without our wrapping applied.

Since the script is just a function body, these values will already be defined, so you don't have to import them (see examples below). You script must return a string that will be included in comment on Pull Request and GitHub Summary.

See actions/github-script for documentation.

WARNING: Actions expressions are evaluated before the script is passed to the action, so the result of any expressions will be evaluated as JavaScript code.

It's highly recommended to not evaluate expressions directly in the script to avoid script injections and potential SyntaxErrors when the expression is not valid JavaScript code (particularly when it comes to improperly escaped strings).

This examples will retrieve coverage/coverage-summary.json results from prior task and pretty print test coverage results to GitHub pull request (if exists) and GitHub Summary. The label is used to provide logging context.

- name: Add Test Coverage Comment on PR and GitHub Summary
  uses: aguilita1/github-script-post-comment@v1
  env:
    JEST_THRESHOLD_LINES: 75
  with:
    label: "Test Coverage"
    script: |
      const fs = require('fs');
      const thresholdLines = parseInt(process.env.JEST_THRESHOLD_LINES, 10);
      if (isNaN(thresholdLines)) {
          throw new Error('JEST_THRESHOLD_LINES environment variable is not set or invalid');
      }

      const coverage = JSON.parse(fs.readFileSync('coverage/coverage-summary.json'));
      const pct = Math.round(coverage.total.lines.pct);
      const status = pct >= thresholdLines ? '✅' : '❌';

      let body = `## Test Coverage Report ${status}\n\n`
          + `**Coverage Found:** ${pct}%\n`
          + `**Expected:** ${thresholdLines}%\n\n`
          + `- Lines: ${coverage.total.lines.pct}%\n`
          + `- Functions: ${coverage.total.functions.pct}%\n`
          + `- Branches: ${coverage.total.branches.pct}%\n`
          + `- Statements: ${coverage.total.statements.pct}%`;

      return body;