From ca9211ecdede9bdedb812b2243a4abdb8dacd1b9 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Wed, 7 Jan 2015 19:55:37 +0000
Subject: Import compiler-rt trunk r224034.

https://llvm.org/svn/llvm-project/compiler-rt/trunk@224034
---
 lib/sanitizer_common/scripts/litlint.py | 72 +++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100755 lib/sanitizer_common/scripts/litlint.py

(limited to 'lib/sanitizer_common/scripts/litlint.py')

diff --git a/lib/sanitizer_common/scripts/litlint.py b/lib/sanitizer_common/scripts/litlint.py
new file mode 100755
index 0000000000000..1e78448b63d4d
--- /dev/null
+++ b/lib/sanitizer_common/scripts/litlint.py
@@ -0,0 +1,72 @@
+#!/usr/bin/python
+#
+# litlint
+#
+# Ensure RUN commands in lit tests are free of common errors.
+#
+# If any errors are detected, litlint returns a nonzero exit code.
+#
+
+import optparse
+import re
+import sys
+
+# Compile regex once for all files
+runRegex = re.compile(r'(?<!-o)(?<!%run) %t\s')
+
+def LintLine(s):
+  """ Validate a line
+
+  Args:
+    s: str, the line to validate
+
+  Returns:
+    Returns an error message and a 1-based column number if an error was
+    detected, otherwise (None, None).
+  """
+
+  # Check that RUN command can be executed with an emulator
+  m = runRegex.search(s)
+  if m:
+    start, end = m.span()
+    return ('missing %run before %t', start + 2)
+
+  # No errors
+  return (None, None)
+
+
+def LintFile(p):
+  """ Check that each RUN command can be executed with an emulator
+
+  Args:
+    p: str, valid path to a file
+
+  Returns:
+    The number of errors detected.
+  """
+  errs = 0
+  with open(p, 'r') as f:
+    for i, s in enumerate(f.readlines(), start=1):
+      msg, col = LintLine(s)
+      if msg != None:
+        errs += 1
+        errorMsg = 'litlint: {}:{}:{}: error: {}.\n{}{}\n'
+        arrow = (col-1) * ' ' + '^'
+        sys.stderr.write(errorMsg.format(p, i, col, msg, s, arrow))
+  return errs
+
+
+if __name__ == "__main__":
+  # Parse args
+  parser = optparse.OptionParser()
+  parser.add_option('--filter')  # ignored
+  (options, filenames) = parser.parse_args()
+
+  # Lint each file
+  errs = 0
+  for p in filenames:
+    errs += LintFile(p)
+
+  # If errors, return nonzero
+  if errs > 0:
+    sys.exit(1)
-- 
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