1 files changed, 43 insertions, 0 deletions
diff --git a/listnewconfig.py b/listnewconfig.py
new file mode 100755
index 0000000..bd35502
--- /dev/null
+++ b/listnewconfig.py
@@ -0,0 +1,43 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2018, Ulf Magnusson
+# SPDX-License-Identifier: ISC
+
+# Works like 'make listnewconfig', listing all modifiable symbols that are not
+# assigned in the configuration file.
+#
+# The default output filename is '.config'. A different filename can be passed
+# in the KCONFIG_CONFIG environment variable.
+
+import sys
+
+from kconfiglib import standard_kconfig, BOOL, TRISTATE, INT, HEX, STRING, \
+                       TRI_TO_STR
+import kconfiglib
+
+def main():
+    kconf = standard_kconfig()
+    kconf.load_config()
+    for sym in kconf.unique_defined_syms:
+        # Only show symbols that can be toggled. Choice symbols are a special
+        # case in that sym.assignable will be (2,) (length 1) for visible
+        # symbols in choices in y mode, but they can still be toggled by
+        # selecting some other symbol.
+        if sym.user_value is None and \
+           (len(sym.assignable) > 1 or \
+            (sym.visibility and (sym.orig_type in (INT, HEX, STRING) or
+                                 sym.choice))):
+
+            # Don't reuse the 'config_string' format for bool/tristate symbols,
+            # to show n-valued symbols as 'CONFIG_FOO=n' instead of
+            # '# CONFIG_FOO is not set'. This matches the C tools.
+            if sym.orig_type in (BOOL, TRISTATE):
+                s = "{}{}={}\n".format(kconf.config_prefix, sym.name,
+                                       TRI_TO_STR[sym.tri_value])
+            else:
+                s = sym.config_string
+
+            sys.stdout.write(s)
+
+if __name__ == "__main__":
+    main()