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