67 lines
2.0 KiB
Python
67 lines
2.0 KiB
Python
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#!/usr/bin/env python
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# Copyright 2020 the V8 project authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""
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Compare two folders and print any differences between files to both a
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results file and stderr.
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Specifically we use this to compare the output of Torque generator for
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both x86 and x64 (-m32) toolchains.
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"""
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import difflib
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import filecmp
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import itertools
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import os
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import sys
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assert len(sys.argv) > 3
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folder1 = sys.argv[1]
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folder2 = sys.argv[2]
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results_file_name = sys.argv[3]
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with open(results_file_name, "w") as results_file:
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def write(line):
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# Print line to both results file and stderr
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sys.stderr.write(line)
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results_file.write(line)
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def has_one_sided_diff(dcmp, side, side_list):
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# Check that we do not have files only on one side of the comparison
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if side_list:
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write("Some files exist only in %s\n" % side)
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for fl in side_list:
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write(fl)
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return side_list
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def has_content_diff(dcmp):
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# Check that we do not have content differences in the common files
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_, diffs, _ = filecmp.cmpfiles(
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dcmp.left, dcmp.right,
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dcmp.common_files, shallow=False)
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if diffs:
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write("Found content differences between %s and %s\n" %
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(dcmp.left, dcmp.right))
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for name in diffs:
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write("File diff %s\n" % name)
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left_file = os.path.join(dcmp.left, name)
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right_file = os.path.join(dcmp.right, name)
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with open(left_file) as f1, open(right_file) as f2:
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diff = difflib.unified_diff(
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f1.readlines(), f2.readlines(),
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dcmp.left, dcmp.right)
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for l in itertools.islice(diff, 100):
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write(l)
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write("\n\n")
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return diffs
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dcmp = filecmp.dircmp(folder1, folder2)
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has_diffs = has_one_sided_diff(dcmp, dcmp.left, dcmp.left_only) \
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or has_one_sided_diff(dcmp, dcmp.right, dcmp.right_only) \
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or has_content_diff(dcmp)
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if has_diffs:
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sys.exit(1)
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