map reduce with redo: Prakhar

all.do

exec >&2
echo -n > diff
redo-ifchange $(find sources -name '*.dat')
for i in $(find sources -name '*.txt');do redo-ifchange ${i}.dat;done
cat diff
grep 'd .*' diff | cut -d ' ' -f 2 | sed -e 's/^/sources\//' | xargs rm
# sh do-reduce <diff
redo-always

default.dat.do

if [ ! -e $1 ];then
 echo -n > $3
 echo d $1.dat >> ../diff
else
 redo-ifchange $1
 echo $1 >> ../diff
 echo $(date) > $3
fi