Cal, Pawel, Baho, all, For the arch master build script I have the script update the tree and then create tarballs on the fly. (easier that mount --bind of local git tree into chroot to use the git tree directly). One of the things I had to do was to automate the update of the md5sum in the PKGBUILD. I have come up with a rather wonky 2-function approach that I want to get comment on. May be OK as it (it works fine), but I welcome thoughts for improvement. The only limitation is that the tarball must be the first md5sum listed in the md5sum array. The functions I use are: ## function getsum(): get the new md5sum (getsum filename) getsum() { [[ -r "$1" ]] || { echo "ERROR: file not found '$1' in function getsum"; return 1; } _tmp=$(md5sum "$1") echo "${_tmp//\ *}" } ## function updtsum(): update the md5sum in pkgbuild (updtsum file newmd5sum) updtsum() { sed -i -e "s/md5sums=('.*'/md5sums=('$2'/" "$1" } Then they are called in the script as follows: ## update the md5sum _newsum=$(getsum "${tgzdir}/${tgzfn}") echo " updating PKGBUILD md5sum -> $_newsum" updtsum "${pbpkgd}/${pbpkg}/PKGBUILD" $_newsum Any areas you see that could be improved? The script isn't ready for distribution yet, but it is getting close. -- David C. Rankin, J.D.,P.E.