Clean up tidy scripts, coverage, performance

This restructures tidy.py to walk the tree itself,
and improves performance considerably by not loading entire
files into buffers for licenseck.

Splits build rules into 'tidy', 'tidy-basic', 'tidy-binaries',
'tidy-errors', 'tidy-features'.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/etc/errorck.py b/src/etc/errorck.py
index 9db9ed576cb..7b11504f3cd 100644
--- a/src/etc/errorck.py
+++ b/src/etc/errorck.py
@@ -15,6 +15,10 @@ import sys
 import os
 import re
 
+if len(sys.argv) < 2:
+    print "usage: errorck.py <src-dir>"
+    sys.exit(1)
+
 src_dir = sys.argv[1]
 errcode_map = {}
 error_re = re.compile("(E\d\d\d\d)")