update-url.yaml

name: update-url
run-name: update site after url change

on:
  # run when called from another workflow
  workflow_call:
    outputs:
      changed:
        value: ${{ jobs.update-url.outputs.changed }}

  # run if user manually requests it
  workflow_dispatch:

permissions:
  contents: write

jobs:
  update-url:
    runs-on: ubuntu-latest

    steps:
      # for debugging
      - name: Print contexts
        uses: crazy-max/ghaction-dump-context@v1

      - name: Get Pages url
        id: pages
        uses: actions/configure-pages@v2
        with:
          enablement: false

      - name: Checkout branch contents
        uses: actions/checkout@v3

      # update link to site in readme
      - name: Update readme
        uses: actions/github-script@v6
        with:
          script: |
            const { readFileSync, writeFileSync } = require("fs");
            const file = "README.md";
            let contents = readFileSync(file).toString();
            const find = /\*\*\[.*\]\(.*\)\*\*/;
            const host = "${{ steps.pages.outputs.host }}";
            const path = "${{ steps.pages.outputs.base_path }}";
            const url = "${{ steps.pages.outputs.base_url }}";
            const replace = `**[${host}${path}](${url})**`;
            if (contents.match(find))
              contents = contents.replace(find, replace);
            else
              contents = `Visit ${replace} 🚀\n\n` + contents;
            writeFileSync(file, contents);

      - name: Check if readme changed
        id: changed
        uses: tj-actions/verify-changed-files@v13
        with:
          files: |
            README.md

      - name: Commit changed files
        if: steps.changed.outputs.files_changed == 'true'
        uses: stefanzweifel/git-auto-commit-action@v4
        with:
          commit_message: "Update url"

    outputs:
      changed: ${{ steps.changed.outputs.files_changed }}