6d767e2a65
.do files should never modify $1, and should write to *either* $3 or stdout, but not both. If they write to both, it's probably because they forgot to redirect stdout to stderr, a very easy mistake to make but a hard one to detect. Now redo detects it for you and prints an informative message.
8 lines
372 B
Text
8 lines
372 B
Text
# we don't delete $3 here, we just truncate and overwrite it. But redo
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# can detect this by checking the current file position of our stdout when
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# we exit, and making sure it equals either 0 or the file size.
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#
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# If it doesn't, then we accidentally wrote to *both* stdout and a separate
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# file, and we should get warned about it.
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echo hello world
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echo goodbye world >$3
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