Add script that updates sha256sums in PKGBUILD
Enforce backup of PKGBUILD
Force direct execution of generate-checksums.sh
Make sed make a backup and do changes in place
Remove PKGBUILD.geninteg when we're done with it
Add comments to generate-checksums.sh
Assume checksums are 32 characters or more

For compatibility with md5sum, sha512sum etc
Run makepkg --verifysource at end of script
Add trace output to generate-checksums.sh
Rename generate-checksums.sh to update-checksums.sh
Add script that automagically updates checksums

Just run
$ ./update-checksums.sh
and enjoy the magic!

The script runs 'makepkg -g' on a copy of PKGBUILD where all if/elif/fi
statements have been removed, and then replaces the old checksums with
the new.