Disallow lines that span more than 160 columns.

The Rust style guide suggests 100, but we have too many violations in the
tree already. This check can be tightened over time.

1 files changed, 8 insertions, 1 deletions

diff --git a/python/tidy.py b/python/tidy.py
index da930eea333..fc282aaa464 100644
--- a/python/tidy.py
+++ b/python/tidy.py
@@ -56,6 +56,13 @@ def check_license(contents):
         yield (1, "incorrect license")
 
 
+def check_length(contents):
+    lines = contents.splitlines(True)
+    for idx, line in enumerate(lines):
+        if len(line) >= 160:
+            yield (idx + 1, "(much) overlong line")
+
+
 def check_whitespace(contents):
     lines = contents.splitlines(True)
     for idx, line in enumerate(lines):
@@ -88,7 +95,7 @@ def scan():
     all_files = collect_file_names(directories_to_check)
     files_to_check = filter(should_check, all_files)
 
-    checking_functions = [check_license, check_whitespace]
+    checking_functions = [check_license, check_length, check_whitespace]
     errors = collect_errors_for_files(files_to_check, checking_functions)
     errors = list(errors)