Atlas - eval_expr.py
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[FILE BEGIN]
1# Evaluates an expression (e.g. "X86_64 || (X86_32 && X86_LOCAL_APIC)") in the
2# context of a configuration. Note that this always yields a tristate value (n,
3# m, or y).
4#
5# Usage:
6#
7#   $ make [ARCH=<arch>] scriptconfig SCRIPT=Kconfiglib/examples/eval_expr.py SCRIPT_ARG=<expr>
8
9import sys
10
11import kconfiglib
12
13
14if len(sys.argv) < 3:
15    sys.exit("Pass the expression to evaluate with SCRIPT_ARG=<expression>")
16
17kconf = kconfiglib.Kconfig(sys.argv[1])
18expr = sys.argv[2]
19
20# Enable modules so that m doesn't get demoted to n
21kconf.modules.set_value(2)
22
23print("the expression '{}' evaluates to {}"
24      .format(expr, kconf.eval_string(expr)))
25
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