(edited)

Steps to reproduce the issue

• new Joomla installation as github clone as described in https://github.com/joomla/joomla-cms/tree/4.4-dev/tests/System
• npm run cypress:run -- --spec 'tests/System/integration/install/Installation.cy.js'

Expected result

• Cypress.based Joomla installation runs without errors, 'Install Joomla' spec is passing
• configuration.php parameters like $mailer = 'smtp' are set correct
• configuration.php file mask is still read-only (444)

Actual result

  1) Install Joomla
       Install Joomla:
     CypressError: `cy.task('writeFile')` failed with the following error:

> EACCES: permission denied, open './configuration.php'

System information (as much as possible)

• seen with local Joomla installations on macOS 14.4.1, Windows 11 and Linux
• does not occur on Linux with root user (as typically in Docker container based installation)
  • in Linux root installation there is the file mask 777 from the web-server created configuration.php file, which may be another problem

Additional comments

• the read-only (444) file mask of configuration.php will likely be the cause
• workaround for Linux, macOS and Windows WSL 2 is to run the installation step as root user who is able to overwrite a read-only file:
  • sudo npx cypress run --spec 'tests/System/integration/install/Installation.cy.js'
  • this needs Cypress to be installed for root user or you use actual users Cypress installation cache, e.g.
    • sudo CYPRESS_CACHE_FOLDER=$HOME/.cache/Cypress npx cypress run --spec 'tests/System/integration/install/Installation.cy.js'
• ongoing pull request is #43466