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).