tools/lldbmacros/core/syntax_checker.py

   1 #!/usr/bin/env python
   2
   3 helpdoc = """
   4 A simple utility that verifies the syntax for python scripts.
   5 The checks it does are :
   6   * Check for 'tab' characters in .py files
   7   * Compile errors in py sources
   8 Usage:
   9   python syntax_checker.py <python_source_file> [<python_source_file> ..]
  10 """
  11 import py_compile
  12 import sys
  13 import os
  14 import re
  15
  16 tabs_search_rex = re.compile("^\s*\t+",re.MULTILINE|re.DOTALL)
  17
  18 def find_non_ascii(s):
  19     for c in s:
  20         if ord(c) >= 0x80: return True
  21     return False
  22
  23 if __name__ == "__main__":
  24     if len(sys.argv) < 2:
  25         print >>sys.stderr, "Error: Unknown arguments"
  26         print helpdoc
  27         sys.exit(1)
  28     for fname in sys.argv[1:]:
  29         if not os.path.exists(fname):
  30             print >>sys.stderr, "Error: Cannot recognize %s as a file" % fname
  31             sys.exit(1)
  32         if fname.split('.')[-1] != 'py':
  33             print "Note: %s is not a valid python file. Skipping." % fname
  34             continue
  35         fh = open(fname)
  36         strdata = fh.readlines()
  37         lineno = 0
  38         syntax_fail = False
  39         for linedata in strdata:
  40             lineno += 1
  41             if len(tabs_search_rex.findall(linedata)) > 0 :
  42                 print >>sys.stderr, "Error: Found a TAB character at %s:%d" % (fname, lineno)
  43                 syntax_fail = True
  44             if find_non_ascii(linedata):
  45                 print >>sys.stderr, "Error: Found a non ascii character at %s:%d" % (fname, lineno)
  46                 syntax_fail = True
  47         if syntax_fail:
  48             print >>sys.stderr, "Error: Syntax check failed. Please fix the errors and try again."
  49             sys.exit(1)
  50         #now check for error in compilation
  51         try:
  52             compile_result = py_compile.compile(fname, cfile="/dev/null", doraise=True)
  53         except py_compile.PyCompileError as exc:
  54             print >>sys.stderr, str(exc)
  55             print >>sys.stderr, "Error: Compilation failed. Please fix the errors and try again."
  56             sys.exit(1)
  57         print "Success: Checked %s. No syntax errors found." % fname
  58     sys.exit(0)
  59