openwrt-archive/scripts/update-package-md5sum

#!/usr/bin/env sh
#
# update-package-md5sum - Updates md5sum of OpenWrt packages
#
# update-package-md5sum will update the md5sum for all recusivly found OpenWrt packages
# in a given directory.
#
# Usage: scripts/update-package-md5sum <package directory>
#
# Example: `scripts/update-package-md5sum feeds/packages/python`

DL_FOLDER=`grep -Eo '^CONFIG_DOWNLOAD_FOLDER=".*"$' .config | \
    sed 's,^CONFIG_DOWNLOAD_FOLDER="\(.*\)"$,\1,'`
if test -z ${DL_FOLDER}; then
    DL_FOLDER=./dl
fi

if test -z "$1"; then
	echo "Usage: $0 <package directory>"
	exit
fi

for file in `find $1 -name Makefile`; do
    if grep BuildPackage ${file} > /dev/null; then
        source=`DUMP=1 TOPDIR=\`pwd\` make -f ${file} | grep -m 1 Source | cut -f 2 -d ' '`
        if test -n "${source}"; then
			if test ! -f "${DL_FOLDER}/${source}"; then
				make package/`basename \`dirname ${file}\``/download
			fi
            sum=`md5sum ${DL_FOLDER}/${source} 2> /dev/null` || continue
            echo Updating ${file}...
            sum=`echo ${sum} | cut -d ' ' -f 1`
            sed -i "s,^PKG_MD5SUM:=.*,PKG_MD5SUM:=${sum}," ${file}
        else
            echo No source for ${file}
        fi
    fi
done