RPM Macro Expansion in Python

Parse RPM macro files and spec files, and expand macros safely—without the potential Turing-Complete side effects.

This is a standalone library that depends only on the standard Python library and PLY (for expression parsing).

How to Use It

$ norpm-expand-specfile --specfile SPEC --expand-string '%{?epoch}%{!?epoch:(none)}:%version'
(none):1.1.1

Directly from Python, you can use:

from norpm.macrofile import system_macro_registry
from norpm.specfile import specfile_expand
registry = system_macro_registry()
with open("SPEC", "r", encoding="utf8") as fd:
    expanded_specfile = specfile_expand(fd.read(), registry)
    print("Name:", registry["name"].value)
    print("Version:", registry["version"].value)

State of the implementation

There still are a few features to be implemented. Your contributions are welcome and greatly encouraged!