Environments

Expressions are evaluated in the environment specified by their language property.

The value maps to a specific environment as specified in settings.LANGUAGES (See the LANGUAGES setting).

Included Environments

Currently, the following environments are shipped with databuild:

Python

Unsafe Python environment. Use only with trusted build files.

Writing Custom Environments

An Environment is a subclass of databuild.environments.base.BaseEnvironment that implements the following methods:

• __init__(self, book): Initializes the environment with the appropriate global variables.
• copy(self, iterable): Copies a variable from the databuild process to the hosted environment.
• eval(self, expression, context): Evaluates the string expression to an actual functions and returns it.

Add-on Environments

Lua

An additional Lua environment is available at http://github.com/databuild/databuild-lua

Requires Lua or LuaJIT (Note: LuaJIT is currently unsupported on OS X).