Add automatic update chacking script

Crunch project websites and try to find the latest version for each
package without having to do the work manually.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>

check_update.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+set -e
+
+SCRIPTDIR=$(cd $(dirname "${BASH_SOURCE[0]}") && pwd)
+
+# dummy toolchain variables
+export LINUXPKG="linux"
+
+# utilities
+source "$SCRIPTDIR/util/depends.sh"
+source "$SCRIPTDIR/util/version.sh"
+source "$SCRIPTDIR/util/misc.sh"
+
+# check all packages
+for pkg in $SCRIPTDIR/pkg/*; do
+	[ -d $pkg ] || continue;
+
+	name=$(basename $pkg)
+	echo "-- checking $name"
+	source "$pkg/build"
+
+	version=$(check_update)
+	if [ ! -z $version ]; then
+		echo "$name has newer version: $version"
+	fi
+done

pkg/bash-completion/build

@@ -24,3 +24,10 @@ deploy() {
 
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	curl --silent -L "$URL" | \
+	    grep -o ">bash-completion-[0-9.]*tar.gz<" | grep -v "2008" |\
+	    sed 's/>bash-completion-//g' | sed 's/.tar.gz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/bash/build

@@ -35,3 +35,9 @@ deploy() {
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 	rm -r "$DEPLOY/lib"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">bash-[0-9.]*tar.gz<" | \
+	    sed 's/>bash-//g' | sed 's/.tar.gz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/bbstatic/build

@@ -30,3 +30,10 @@ deploy() {
 	mkdir -p "$DEPLOY/bin"
 	cp "$PKGBUILDDIR/busybox" "$DEPLOY/bin"
 }
+
+check_update() {
+	curl --silent -L "$URL" | \
+	    grep -o ">busybox-[0-9.]*tar.bz2<" | \
+	    sed 's/>busybox-//g' | sed 's/.tar.bz2<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/bdb/build

@@ -29,3 +29,9 @@ deploy() {
 	rm -r "$DEPLOY/docs"
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	# we need to login to access newer versions
+	# ... because Oracle, thats why!
+	return
+}

pkg/btrfs-progs/build

@@ -32,3 +32,10 @@ deploy() {
 	strip_files ${DEPLOY}/{bin,lib}/*
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	curl --silent -L "$URL" | \
+	    grep -o ">btrfs-progs-v[0-9.]*tar.xz<" | \
+	    sed 's/>btrfs-progs-v//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/bzip2/build

@@ -36,3 +36,9 @@ deploy() {
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 	rmdir "$DEPLOY/lib"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o "bzip2-[0-9.]*tar.gz" | \
+	    sed 's/bzip2-//g' | sed 's/.tar.gz//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/coreutils/build

@@ -23,3 +23,9 @@ deploy() {
 	make DESTDIR="$DEPLOY" install-strip
 	rm -r "$DEPLOY/share" "$DEPLOY/lib"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">coreutils-[0-9.]*tar.xz<" | \
+	    sed 's/>coreutils-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/dhcpcd/build

@@ -34,3 +34,9 @@ deploy() {
 
 	rm -rf "$DEPLOY/usr"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">dhcpcd-[0-9.]*tar.xz<" | \
+	    sed 's/>dhcpcd-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/diffutils/build

@@ -23,3 +23,9 @@ deploy() {
 
 	rm -r "$DEPLOY/share" "$DEPLOY/lib"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">diffutils-[0-9.]*tar.xz<" | \
+	    sed 's/>diffutils-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/dnsmasq/build

@@ -35,3 +35,9 @@ deploy() {
 
 	mkdir -p "$DEPLOY/etc/dnsmasq.d"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">dnsmasq-[0-9.]*tar.xz<" | \
+	    sed 's/>dnsmasq-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/dosfstools/build

@@ -24,3 +24,10 @@ deploy() {
 	make DESTDIR="$DEPLOY" install-strip
 	rm -r "$DEPLOY/share"
 }
+
+check_update() {
+	curl --silent -L "https://github.com/dosfstools/dosfstools/releases" |\
+	    grep -o "dosfstools-[0-9.]*tar.xz" | \
+	    sed 's/dosfstools-//g' | sed 's/.tar.xz//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/ethtool/build

@@ -23,3 +23,9 @@ deploy() {
 
 	rm -r "$DEPLOY/share"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o "ethtool-[0-9.]*tar.xz" | \
+	    sed 's/ethtool-//g' | sed 's/.tar.xz//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/eudev/build

@@ -31,3 +31,9 @@ deploy() {
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 	rmdir "$DEPLOY/share"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o "eudev-[0-9.]*tar.gz" | \
+	    sed 's/eudev-//g' | sed 's/.tar.gz//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/expat/build

@@ -27,3 +27,12 @@ deploy() {
 
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	local version=$(echo "$VERSION" | sed 's/R_//g' | sed 's/_/./g')
+
+	curl --silent -L "https://github.com/libexpat/libexpat/releases" | \
+	    grep -o "expat-[0-9.]*tar.bz2" | \
+	    sed 's/expat-//g' | sed 's/.tar.bz2//g' | \
+	    verson_find_greatest "$version"
+}

pkg/file/build

@@ -26,3 +26,9 @@ deploy() {
 
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	curl --silent --list-only "$URL/" | grep -o "file-[0-9.]*tar.gz" | \
+	    sed 's/file-//g' | sed 's/.tar.gz//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/findutils/build

@@ -24,3 +24,9 @@ deploy() {
 
 	rm -r "$DEPLOY/share" "$DEPLOY/lib"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">findutils-[0-9.]*tar.gz<" | \
+	    sed 's/>findutils-//g' | sed 's/.tar.gz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/firmware-rpi3/build

@@ -32,3 +32,9 @@ deploy() {
 	strip_files ${DEPLOY}/opt/vc/lib/*.so
 	strip_files ${DEPLOY}/opt/vc/lib/plugins/*.so
 }
+
+check_update() {
+	curl --silent -L https://github.com/raspberrypi/firmware/releases | \
+	     grep -o "[0-9.]\+tar.gz" | sed 's/.tar.gz//g' | \
+	     verson_find_greatest "$VERSION"
+}

pkg/gawk/build

@@ -24,3 +24,9 @@ deploy() {
 	rm "$DEPLOY/bin/gawk-$VERSION"
 	rm -r "$DEPLOY/include" "$DEPLOY/share/info" "$DEPLOY/share/man"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">gawk-[0-9.]*tar.xz<" | \
+	    sed 's/>gawk-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/gmp/build

@@ -27,3 +27,9 @@ deploy() {
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 	strip_files ${DEPLOY}/lib/*.so*
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">gmp-[0-9.]*tar.bz2<" | \
+	    sed 's/>gmp-//g' | sed 's/.tar.bz2<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/grep/build

@@ -22,3 +22,9 @@ deploy() {
 	make DESTDIR="$DEPLOY" install-strip
 	rm -r "$DEPLOY/share" "$DEPLOY/lib"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">grep-[0-9.]*tar.xz<" | \
+	    sed 's/>grep-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/gzip/build

@@ -22,3 +22,9 @@ deploy() {
 	make DESTDIR="$DEPLOY" install-strip
 	rm -r "$DEPLOY/share"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">gzip-[0-9.]*tar.xz<" | \
+	    sed 's/>gzip-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/iana-etc/build

@@ -21,3 +21,7 @@ deploy() {
 	cp "$SOURCE/protocols" "$DEPLOY/etc"
 	cp "$SOURCE/services" "$DEPLOY/etc"
 }
+
+check_update() {
+	return
+}

pkg/inetutils/build

@@ -27,3 +27,9 @@ deploy() {
 	rm -r "$DEPLOY/share" "$DEPLOY/lib"
 	(rmdir "$DEPLOY/libexec" || true) 2> /dev/null ;
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">inetutils-[0-9.]*tar.xz<" | \
+	    sed 's/>inetutils-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/init/build

@@ -71,3 +71,7 @@ deploy() {
 
 	unset -v i GETTY_TTY HWCLOCK DHCP_PORTS
 }
+
+check_update() {
+	return
+}

pkg/initrd/build

@@ -26,3 +26,7 @@ slink /bin/sh /bin/busybox 0777 0 0
 file /init $DEPLOY/init 0775 0 0
 _EOF
 }
+
+check_update() {
+	return
+}

pkg/iproute2/build

@@ -27,3 +27,9 @@ deploy() {
 
 	strip_files ${DEPLOY}/bin/*
 }
+
+check_update() {
+	curl --silent -L $URL | grep -o "iproute2-[0-9.]*tar.xz" | \
+	    sed 's/iproute2-//g' | sed 's/.tar.xz//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/kbd/build

@@ -27,3 +27,9 @@ deploy() {
 
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">kbd-[0-9.]*tar.xz<" | \
+	    sed 's/>kbd-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/kmod/build

@@ -32,3 +32,9 @@ deploy() {
 
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">kmod-[0-9.]*tar.xz<" | \
+	    sed 's/>kmod-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/less/build

@@ -25,3 +25,9 @@ deploy() {
 
 	rm -r "$DEPLOY/share"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">less-[0-9.]*tar.gz<" | \
+	    sed 's/>less-//g' | sed 's/.tar.gz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/libbsd/build

@@ -26,3 +26,9 @@ deploy() {
 
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">libbsd-[0-9.]*tar.xz<" | \
+	    sed 's/>libbsd-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/libevent/build

@@ -27,3 +27,9 @@ deploy() {
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 	strip_files ${DEPLOY}/lib/*
 }
+
+check_update() {
+	curl --silent -L https://github.com/libevent/libevent/releases | \
+	    grep -o "libevent-[0-9.]*-stable" | grep -o "[0-9.]*" | \
+	    verson_find_greatest "$VERSION"
+}

pkg/libiconv/build

@@ -28,3 +28,9 @@ deploy() {
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 	strip_files ${DEPLOY}/{bin,lib}/*
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">libiconv-[0-9.]*tar.gz<" | \
+	    sed 's/>libiconv-//g' | sed 's/.tar.gz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/libidn2/build

@@ -26,3 +26,9 @@ deploy() {
 
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">libidn2-[0-9.]*tar.gz<" | \
+	    sed 's/>libidn2-//g' | sed 's/.tar.gz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/libmnl/build

@@ -24,3 +24,9 @@ deploy() {
 
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">libmnl-[0-9.]*tar.bz2<" | \
+	    sed 's/>libmnl-//g' | sed 's/.tar.bz2<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/libnftnl/build

@@ -24,3 +24,9 @@ deploy() {
 
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">libnftnl-[0-9.]*tar.bz2<" | \
+	    sed 's/>libnftnl-//g' | sed 's/.tar.bz2<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/libseccomp/build

@@ -26,3 +26,9 @@ deploy() {
 
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	curl --silent -L https://github.com/seccomp/libseccomp/releases | \
+	    grep -o "libseccomp-[0-9.]*tar.gz" | sed 's/libseccomp-//g' | \
+	    sed 's/.tar.gz//g' | verson_find_greatest "$VERSION"
+}

pkg/libtasn1/build

@@ -26,3 +26,9 @@ deploy() {
 
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">libtasn1-[0-9.]*tar.gz<" | \
+	    sed 's/>libtasn1-//g' | sed 's/.tar.gz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/libunistring/build

@@ -27,3 +27,9 @@ deploy() {
 
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">libunistring-[0-9.]*tar.xz<" | \
+	    sed 's/>libunistring-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/linux-rpi3/build

@@ -32,3 +32,12 @@ deploy() {
 
 	install -m 755 "arch/arm/boot/zImage" "$DEPLOY/vmlinuz"
 }
+
+check_update() {
+	local version=$(echo $VERSION | sed 's/-[0-9]*$//g')
+
+	curl --silent -L "https://github.com/raspberrypi/linux/releases" | \
+	    grep -o "raspberrypi-kernel_[0-9.]*-[0-9]" | \
+	    sed 's/raspberrypi-kernel_//g' | sed 's/-/./g' | \
+	    verson_find_greatest "$version"
+}

pkg/linux/build

@@ -34,3 +34,10 @@ deploy() {
 
 	install -m 755 "arch/$LINUX_CPU/boot/$LINUX_TGT" "$DEPLOY/vmlinuz"
 }
+
+check_update() {
+	curl --silent -L https://www.kernel.org/ | \
+	    grep -o linux-[0-9.]*tar.xz | \
+	    sed 's/linux-//g' | sed 's/.tar.xz//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/lzo/build

@@ -27,3 +27,9 @@ deploy() {
 
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">lzo-[0-9.]*tar.gz<" | \
+	    sed 's/>lzo-//g' | sed 's/.tar.gz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/musl/build

@@ -32,3 +32,9 @@ deploy() {
 
 	strip_files ${DEPLOY}/lib/*
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">musl-[0-9.]*tar.gz<" | \
+	    sed 's/>musl-//g' | sed 's/.tar.gz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/nano/build

@@ -23,3 +23,9 @@ deploy() {
 
 	rm -r "$DEPLOY/share" "$DEPLOY/lib"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">nano-[0-9.]*tar.xz<" | \
+	    sed 's/>nano-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/ncurses/build

@@ -69,3 +69,9 @@ deploy() {
 
 	rm -r "$olddir"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">ncurses-[0-9.]*tar.gz<" | \
+	    sed 's/>ncurses-//g' | sed 's/.tar.gz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/nettle/build

@@ -25,3 +25,9 @@ deploy() {
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 	strip_files ${DEPLOY}/{bin,lib}/*
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">nettle-[0-9.]*tar.gz<" | \
+	    sed 's/>nettle-//g' | sed 's/.tar.gz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/nftables/build

@@ -23,3 +23,9 @@ deploy() {
 
 	make DESTDIR="$DEPLOY" install-strip
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">nftables-[0-9.]*tar.bz2<" | \
+	    sed 's/>nftables-//g' | sed 's/.tar.bz2<//g' | grep -v 0.099 |\
+	    verson_find_greatest "$VERSION"
+}

pkg/openssh/build

@@ -35,3 +35,11 @@ deploy() {
 
 	install -v -m755 "$SOURCE/contrib/ssh-copy-id" "$DEPLOY/bin"
 }
+
+check_update() {
+	local version=$(echo $VERSION | sed 's/p/./g')
+
+	curl --silent -L "$URL" | grep -o ">openssh-[0-9.]*p[0-9]*.tar.gz<" | \
+	    sed 's/>openssh-//g' | sed 's/.tar.gz<//g' | sed 's/p/./g' | \
+	    verson_find_greatest "$version"
+}

pkg/openssl/build

@@ -31,3 +31,12 @@ deploy() {
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 	strip_files ${DEPLOY}/bin/* ${DEPLOY}/lib/*.so*
 }
+
+check_update() {
+	local version=$(echo $VERSION | sed 's/\([[:lower:]]\)/.\1/g')
+
+	curl --silent -L "$URL" | grep -o ">openssl-[0-9a-z.]*tar.gz<" | \
+	    sed 's/>openssl-//g' | sed 's/.tar.gz<//g' | \
+	    sed 's/\([[:lower:]]\)/.\1/g' | \
+	    verson_find_greatest "$version"
+}

pkg/procps-ng/build

@@ -30,3 +30,9 @@ deploy() {
 
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">procps-ng-[0-9.]*tar.xz<" | \
+	    sed 's/>procps-ng-//g' | sed 's/.tar.xz<//g' |\
+	    verson_find_greatest "$VERSION"
+}

pkg/psmisc/build

@@ -26,3 +26,9 @@ deploy() {
 	make DESTDIR="$DEPLOY" install-strip
 	rm -r "$DEPLOY/share"
 }
+
+check_update() {
+	curl --silent -L $URL | grep -o ">psmisc-[0-9.]*tar.xz<" | \
+	    sed 's/>psmisc-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/readline/build

@@ -28,3 +28,9 @@ deploy() {
 	chmod 755 ${DEPLOY}/lib/*
 	strip_files ${DEPLOY}/lib/*
 }
+
+check_update() {
+	curl --silent -L $URL | grep -o ">readline-[0-9.]*tar.gz<" | \
+	    sed 's/>readline-//g' | sed 's/.tar.gz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/release-alix/build

@@ -35,3 +35,7 @@ deploy() {
 
 	tar czf "$DEPLOY/$PKGNAME.tar.gz" *
 }
+
+check_update() {
+	return
+}

pkg/release-rpi3/build

@@ -36,3 +36,7 @@ deploy() {
 
 	tar czf "$DEPLOY/$PKGNAME.tar.gz" *
 }
+
+check_update() {
+	return
+}

pkg/rootfs/build

@@ -59,3 +59,7 @@ deploy() {
 	find $PKGBUILDDIR/{bin,lib,share} -type d -exec chmod u+w {} \;
 	find $PKGBUILDDIR/{bin,lib,share} -type f -exec chmod u+w {} \;
 }
+
+check_update() {
+	return
+}

pkg/sed/build

@@ -23,3 +23,9 @@ deploy() {
 
 	rm -r "$DEPLOY/share" "$DEPLOY/lib"
 }
+
+check_update() {
+	curl --silent -L $URL | grep -o ">sed-[0-9.]*tar.xz<" | \
+	    sed 's/>sed-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/shadow/build

@@ -38,3 +38,10 @@ deploy() {
 
 	rm $DEPLOY/bin/{vigr,vipw,chsh}
 }
+
+check_update() {
+	curl --silent -L https://github.com/shadow-maint/shadow/releases | \
+	    grep -o "shadow-[0-9.]*tar.xz" | \
+	    sed 's/shadow-//g' | sed 's/.tar.xz//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/sqlite3/build

@@ -26,3 +26,9 @@ deploy() {
 
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	curl --silent -L https://sqlite.org/download.html | \
+	    grep -o sqlite-autoconf-[0-9]*.tar.gz | grep -o [0-9]* | \
+	    verson_find_greatest "$VERSION"
+}

pkg/tar/build

@@ -23,3 +23,9 @@ deploy() {
 
 	rm -r "$DEPLOY/share" "$DEPLOY/lib"
 }
+
+check_update() {
+	curl --silent -L $URL | grep -o ">tar-[0-9.]*tar.xz<" | \
+	    sed 's/>tar-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/tc-binutils/build

@@ -20,3 +20,9 @@ build() {
 deploy() {
 	make install
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">binutils-[0-9.]*tar.xz<" | \
+	    sed 's/>binutils-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/tc-cloog/build

@@ -16,3 +16,9 @@ build() {
 deploy() {
 	return
 }
+
+check_update() {
+	curl --silent --list-only "$URL/" | grep -o "cloog-[0-9.]*tar.gz" | \
+	    sed 's/cloog-//g' | sed 's/.tar.gz//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/tc-gcc1/build

@@ -40,3 +40,10 @@ build() {
 deploy() {
 	make install-gcc install-target-libgcc
 }
+
+check_update() {
+	curl --silent -L "http://ftp.gnu.org/gnu/gcc" | \
+	    grep -o ">gcc-[0-9.]*/<" | \
+	    sed 's/>gcc-//g' | sed 's/\/<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/tc-gmp/build

@@ -1,8 +1,5 @@
-VERSION="6.1.2"
+# inherit package details from target GMP package
-SRCDIR="gmp-$VERSION"
+source "$SCRIPTDIR/pkg/gmp/build"
-TARBALL="gmp-$VERSION.tar.bz2"
-URL="http://ftp.gnu.org/gnu/gmp"
-SHA256SUM="5275bb04f4863a13516b2f39392ac5e272f5e1bb8057b18aec1c9b79d73d8fb2"
 DEPENDS=""
 
 prepare() {

pkg/tc-isl/build

@@ -16,3 +16,9 @@ build() {
 deploy() {
 	return
 }
+
+check_update() {
+	curl --silent --list-only "$URL/" | grep -o "isl-[0-9.]*tar.bz2" | \
+	    sed 's/isl-//g' | sed 's/.tar.bz2//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/tc-mpc/build

@@ -16,3 +16,9 @@ build() {
 deploy() {
 	return
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">mpc-[0-9.]*tar.gz<" | \
+	    sed 's/>mpc-//g' | sed 's/.tar.gz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/tc-mpfr/build

@@ -16,3 +16,9 @@ build() {
 deploy() {
 	return
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">mpfr-[0-9.]*tar.xz<" | \
+	    sed 's/>mpfr-//g' | sed 's/.tar.xz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/tc-pkg-config/build

@@ -27,3 +27,9 @@ deploy() {
 
 	ln -s pkg-config "$TCDIR/bin/$TARGET-pkg-config"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">pkg-config-[0-9.]*tar.gz<" | \
+	    sed 's/>pkg-config-//g' | sed 's/.tar.gz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/toolchain/build

@@ -23,3 +23,7 @@ set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
 _EOF
 	save_toolchain
 }
+
+check_update() {
+	return
+}

pkg/unbound/build

@@ -40,3 +40,9 @@ _EOF
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 	strip_files ${DEPLOY}/{bin,lib}/*
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o ">unbound-[0-9.]*tar.gz<" | \
+	    sed 's/>unbound-//g' | sed 's/.tar.gz<//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/util-linux/build

@@ -61,3 +61,9 @@ deploy() {
 
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	curl --silent -L "https://www.kernel.org/pub/linux/utils/util-linux" | \
+	    grep -o "v[0-9.]*/" | grep -o "[0-9.]*" | \
+	    verson_find_greatest "$VERSION"
+}

pkg/xz/build

@@ -26,3 +26,9 @@ deploy() {
 
 	split_dev_deploy "$DEPLOY" "$DEVDEPLOY"
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o "xz-[0-9.]*tar.xz" | \
+	    sed 's/xz-//g' | sed 's/.tar.xz//g' | \
+	    verson_find_greatest "$VERSION"
+}

pkg/zlib/build

@@ -28,3 +28,9 @@ deploy() {
 
 	rm -r ${DEPLOY}/share
 }
+
+check_update() {
+	curl --silent -L "$URL" | grep -o "xz-[0-9.]*tar.xz" | \
+	    sed 's/zlib-//g' | sed 's/.tar.xz//g' | \
+	    verson_find_greatest "$VERSION"
+}

util/depends.sh

@@ -1,7 +1,7 @@
 include_pkg() {
 	PKGNAME="$1"		# globally visible package name
 
-	unset -f build deploy prepare
+	unset -f build deploy prepare check_update
 	unset -v VERSION TARBALL URL SRCDIR SHA256SUM DEPENDS
 	source "$SCRIPTDIR/pkg/$PKGNAME/build"
 }

util/version.sh

@@ -0,0 +1,33 @@
+get_version_field() {
+	local field=$(echo "$1" | cut -d. -f$2 | sed 's/^0*//')
+
+	if [ -z $field ]; then
+		field="0"
+	fi
+
+	case "$field" in
+	[a-zA-Z]) printf '%d' "'$field'" ;;
+	*) echo "$field" ;;
+	esac
+}
+
+verson_find_greatest() {
+	local version i v V
+	local found="$1"
+
+	while read version; do
+		for i in 1 2 3 4; do
+			v=$(get_version_field $version $i)
+			V=$(get_version_field $found $i)
+			[ $v -ge $V ] || break
+			if [ $v -gt $V ]; then
+			    found="$version"
+			    break
+			fi
+		done
+	done
+
+	if [ "$found" != "$1" ]; then
+		echo "$found"
+	fi
+}