51 lines
1.4 KiB
Python
51 lines
1.4 KiB
Python
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#!/usr/bin/env python3
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# `llvm-cov show` prints grouped subviews (e.g. for generic functions) in an
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# unstable order, which is inconvenient when checking output snapshots with
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# `diff`. To work around that, this script detects consecutive subviews in its
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# piped input, and sorts them while preserving their contents.
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from __future__ import print_function
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import sys
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def main():
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subviews = []
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def flush_subviews():
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if not subviews:
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return
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# The last "subview" should be just a boundary line on its own, so
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# temporarily remove it before sorting the accumulated subviews.
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terminator = subviews.pop()
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subviews.sort()
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subviews.append(terminator)
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for view in subviews:
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for line in view:
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print(line, end="")
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subviews.clear()
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for line in sys.stdin:
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if line.startswith(" ------------------"):
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# This is a subview boundary line, so start a new subview.
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subviews.append([line])
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elif line.startswith(" |"):
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# Add this line to the current subview.
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subviews[-1].append(line)
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else:
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# This line is not part of a subview, so sort and print any
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# accumulated subviews, and then print the line as-is.
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flush_subviews()
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print(line, end="")
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flush_subviews()
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assert not subviews
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if __name__ == "__main__":
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main()
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