6 calls to drush_server_home()

drush_directory_cache in includes/environment.inc
The path to the global cache directory.
drush_preflight_backup_dir in includes/filesystem.inc
Decide where our backup directory should go
_drush_config_file in includes/context.inc
Return a list of possible drushrc file locations.
_drush_core_config_php_ini_files in commands/core/core.drush.inc
_drush_preflight_alias_path in includes/preflight.inc
_drush_preflight_base_environment in includes/preflight.inc
Sets up basic environment that controls where Drush looks for files on a system-wide basis. Important to call for "early" functions that need to work with unit tests.