59201dd7a0
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.
11 lines
237 B
Text
11 lines
237 B
Text
redo-ifchange config.sh
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. ./config.sh
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exec >$3
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cat <<-EOF
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redo-ifchange \$1.c
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gcc -MD -MF \$3.deps.tmp -o \$3 -c \$1.c
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DEPS=\$(sed -e "s/^\$3://" -e 's/\\\\//g' <\$3.deps.tmp)
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rm -f \$3.deps.tmp
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redo-ifchange \$DEPS
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EOF
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chmod +x $3
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