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Environment variables

A number of environment variables influence frePPLe.

Variable Description
FREPPLE_HOME FrePPLe uses some configuration files during the execution of the program:

  • The file frepple.xsd points to the xsd schema for the frePPLe XML files.
    This xsd file typically references additional xsd files located in the same directory.
  • If present, the XML data in the file init.xml are processed automatically when frePPLe is started.
    This is the recommended place to load any standard data entities your application may need.
  • If present, the Python code in the file init.py is executed automatically when frePPLe is started.
    This is the recommended place to define any Python functions or classes your application may need. FrePPLe extension modules are also typcially loaded in this file.
  • Plugin module libraries.

FrePPLe searches the following directories in sequence to locate these files.

  • The current directory.
  • The directory pointed to by the FREPPLE_HOME environment variable.
  • The data directory where the default configuration files are installed.
    This applies only for Linux and Unix platforms.
  • The library directory where the default module libraries are installed.
    This applies only for Linux and Unix platforms.
  • For the loading module libraries frePPLe also searches the standard path for location shared libraries.
    Configuring this is platform dependent.

By setting the FREPPLE_HOME environment variable you can control the directories where the application looks for your application files.

TZ FrePPLe uses the C-library functions for date and time manipulations. These functions are respecting time zones and daylight saving time, which can give sometimes give unexpected results: twice a year you’ll find a day with 25 or 23 hours.
To disable any effects of daylight saving time, change the TZ variable to a time zone without daylight saving time, e.g. ‘EST’.
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