mirror of
https://github.com/dgtlmoon/changedetection.io.git
synced 2025-11-03 16:17:51 +00:00
53 lines
2.1 KiB
Python
53 lines
2.1 KiB
Python
# used for the notifications, the front-end is using a JS library
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import difflib
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def same_slicer(l, a, b):
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if a == b:
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return [l[a]]
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else:
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return l[a:b]
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# like .compare but a little different output
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def customSequenceMatcher(before, after, include_equal=False):
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cruncher = difflib.SequenceMatcher(isjunk=lambda x: x in " \\t", a=before, b=after)
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# @todo Line-by-line mode instead of buncghed, including `after` that is not in `before` (maybe unset?)
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for tag, alo, ahi, blo, bhi in cruncher.get_opcodes():
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if include_equal and tag == 'equal':
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g = before[alo:ahi]
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yield g
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elif tag == 'delete':
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g = ["(removed) " + i for i in same_slicer(before, alo, ahi)]
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yield g
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elif tag == 'replace':
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g = ["(changed) " + i for i in same_slicer(before, alo, ahi)]
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g += ["(into ) " + i for i in same_slicer(after, blo, bhi)]
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yield g
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elif tag == 'insert':
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g = ["(added ) " + i for i in same_slicer(after, blo, bhi)]
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yield g
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# only_differences - only return info about the differences, no context
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# line_feed_sep could be "<br/>" or "<li>" or "\n" etc
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def render_diff(previous_file, newest_file, include_equal=False, line_feed_sep="\n"):
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with open(newest_file, 'r') as f:
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newest_version_file_contents = f.read()
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newest_version_file_contents = [line.rstrip() for line in newest_version_file_contents.splitlines()]
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if previous_file:
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with open(previous_file, 'r') as f:
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previous_version_file_contents = f.read()
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previous_version_file_contents = [line.rstrip() for line in previous_version_file_contents.splitlines()]
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else:
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previous_version_file_contents = ""
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rendered_diff = customSequenceMatcher(previous_version_file_contents,
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newest_version_file_contents,
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include_equal)
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# Recursively join lists
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f = lambda L: line_feed_sep.join([f(x) if type(x) is list else x for x in L])
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return f(rendered_diff)
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