6 uses of FILE_EXIST in Zircon Profile 8.0

drupal_verify_install_file in core/includes/install.inc

Verifies the state of the specified file.

install_check_requirements in core/includes/install.core.inc

Checks installation requirements and reports any errors.

install_check_translations in core/includes/install.core.inc

Checks installation requirements and reports any errors.

simpletest_requirements in core/modules/simpletest/simpletest.install

Implements hook_requirements().

SiteConfigureForm::buildForm in core/lib/Drupal/Core/Installer/Form/SiteConfigureForm.php

Form constructor.

system_requirements in core/modules/system/system.install

Implements hook_requirements().