apenwarr-redo/t/silencetest.do
Avery Pennarun 59201dd7a0 $3 and stdout no longer refer to the same file.
This is slightly inelegant, as the old style
	echo foo
	echo blah
	chmod a+x $3

doesn't work anymore; the stuff you wrote to stdout didn't end up in $3.
You can rewrite it as:
	exec >$3
	echo foo
	echo blah
	chmod a+x $3

Anyway, it's better this way, because now we can tell the difference between
a zero-length $3 and a nonexistent one.  A .do script can thus produce
either one and we'll either delete the target or move the empty $3 to
replace it, whichever is right.

As a bonus, this simplifies our detection of whether you did something weird
with overlapping changes to stdout and $3.
2010-12-11 00:29:04 -08:00

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echo 'echo hello' >silence.do
redo silence
[ -e silence ] || exit 55
echo 'true' >silence.do
redo silence
[ ! -e silence ] || exit 66
rm -f silence.do