playwright: stop expecting git-scm.com to be the Rails app

Now that we are really close to switching over https://git-scm.com/ from
the Rails app to the Hugo/Pagefind-generated static site, it is time to
stop assuming that it is the former.

Indeed, I have just changed the `deploy` workflow to ensure that the
site works as expected when being deployed as `http://git-scm.com/`.

So let's just change the `playwright` workflow to have another input
that specifies whether the person triggering that workflow expects the
URL to resolve to a Rails app variant of the site or not, and stop
trying to determine that automatically.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

Diff for: .github/workflows/playwright.yml

@@ -6,6 +6,10 @@ on:
         description: 'URL to test'
         required: true
         default: 'https://git-scm.com'
+      assume-rails-app:
+        description: 'Whether the URL points to the original Rails app variant of the site'
+        required: false
+        default: 'false'
 jobs:
   test:
     timeout-minutes: 60
@@ -20,6 +24,7 @@ jobs:
     - name: Run Playwright tests
       env:
         PLAYWRIGHT_TEST_URL: ${{ github.event.inputs.url }}
+        PLAYWRIGHT_ASSUME_RAILS_APP: ${{ github.event.inputs.assume-rails-app }}
       run: npx playwright test --project=chrome
     - uses: actions/upload-artifact@v4
       if: always()

Diff for: tests/git-scm.spec.js

@@ -3,7 +3,7 @@ const { test, expect, selectors } = require('@playwright/test')
 const url = process.env.PLAYWRIGHT_TEST_URL
   ? process.env.PLAYWRIGHT_TEST_URL.replace(/[^/]$/, '$&/')
   : 'https://git-scm.com/'
-const isRailsApp = url === 'https://git-scm.com/'
+const isRailsApp = process.env.PLAYWRIGHT_ASSUME_RAILS_APP === 'true'
 
 // Whenever a test fails, attach a screenshot to diagnose failures better
 test.afterEach(async ({ page }, testInfo) => {