dumb bash preprocessor

sourcegrep.sh

#!/bin/bash -evx

#replace strings like !sg{int peer_id net/receivethread.cpp} to relevant source:line string like net/receivethread.cpp:123

grep -P -o '!sg\{[^\n]+?\}' $1 | sed -e 's/}$//' -e 's/!sg{//' | while read l
do
    file=$(echo "$l" | rev | cut -f 1 -d' ' | rev)
    pattern=$(echo "$l" | sed -e "s; $file$;;")
    pointer=$(grep -FnH "$pattern" $file | cut -f 1-2 -d: | head -n1)
    echo "$file $pattern $pointer"
    [ -z "$pointer" -o -z "$pattern" -o -z "$file" ] && exit 1
    sed -i -e 's$!sg{'"$l"'}$'"$pointer"'$' $1 || exit 1
done