werc/bin/md_cache

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#!/usr/bin/env rc
#!/bin/rc
. 9.rc
cachedir=/tmp/md_cache
mkdir -p $cachedir >[2]/dev/null
tmpfile=$cachedir/mdtmp.$pid
score=`{{tee $tmpfile || exit 1} | sha1sum}
cachefile=$cachedir/$score
if(test -f $cachefile)
cat $cachefile
if not {
markdown.pl < $tmpfile | tee $cachefile.$pid
mv $cachefile.$pid $cachefile
}
rm $tmpfile >[2]/dev/null