Add an allmodconfig implementation

Verified to produce identical output to 'make allmodconfig', for all
arches.

Will be packaged.

1 files changed, 39 insertions, 0 deletions

diff --git a/allmodconfig.py b/allmodconfig.py
new file mode 100755
index 0000000..3f049a8
--- /dev/null
+++ b/allmodconfig.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python
+
+# Works like 'make allmodconfig'. Verified by the test suite to generate output
+# identical to 'make allmodconfig', for all ARCHES.
+#
+# Usage for the Linux kernel:
+#
+#   $ make [ARCH=<arch>] scriptconfig SCRIPT=Kconfiglib/examples/allyesconfig.py
+
+import kconfiglib
+
+def main():
+    kconf = kconfiglib.standard_kconfig()
+
+    # Avoid warnings printed by Kconfiglib when assigning a value to a symbol that
+    # has no prompt. Such assignments never have an effect.
+    kconf.disable_warnings()
+
+    # Small optimizations
+    BOOL = kconfiglib.BOOL
+    TRISTATE = kconfiglib.TRISTATE
+
+    for sym in kconf.defined_syms:
+        if sym.orig_type == BOOL:
+            # 'bool' choice symbols get their default value, as determined by
+            # e.g. 'default's on the choice
+            if not sym.choice:
+                # All other bool symbols get set to 'y', like for allyesconfig
+                sym.set_value(2)
+        elif sym.orig_type == TRISTATE:
+            sym.set_value(1)
+
+    for choice in kconf.choices:
+        choice.set_value(2 if choice.orig_type == BOOL else 1)
+
+    kconf.write_config(kconfiglib.standard_config_filename())
+
+if __name__ == "__main__":
+    main()