Don't show backtraces for expected exceptions in tools

KconfigError and IOError are part of normal operation and don't indicate
a problem with the library itself. Catch and print them in
standard_kconfig() and sys.exit(), to avoid spammy backtraces from e.g.
menuconfig.py when Kconfig files don't exist or have errors.

1 files changed, 7 insertions, 1 deletions

diff --git a/kconfiglib.py b/kconfiglib.py
index 1e320a5..eae271e 100644
--- a/kconfiglib.py
+++ b/kconfiglib.py
@@ -5585,7 +5585,13 @@ def standard_kconfig():
     if len(sys.argv) > 2:
         sys.exit("usage: {} [Kconfig]".format(sys.argv[0]))
 
-    return Kconfig("Kconfig" if len(sys.argv) < 2 else sys.argv[1])
+    # Only show backtraces for unexpected exceptions
+    try:
+        return Kconfig("Kconfig" if len(sys.argv) < 2 else sys.argv[1])
+    except (IOError, KconfigError) as e:
+        # Some long exception messages have extra newlines for better
+        # formatting when reported as an unhandled exception. Strip them here.
+        sys.exit(str(e).strip())
 
 def standard_config_filename():
     """