setup-apkcache: new setup tool

A tool to setup the apk cache. This and setup-lbu replaces the
setup-apklbu tool.

.gitignore

@@ -5,6 +5,7 @@ setup-acf
 setup-ads
 setup-alpine
 setup-alpine-web
+setup-apkcache
 setup-apkrepos
 setup-bootable
 setup-cryptswap

Makefile

@@ -13,7 +13,7 @@ SBIN_FILES	:= lbu\
 		setup-ads\
 		setup-alpine\
 		setup-alpine-web\
-		setup-apklbu\
+		setup-apkcache\
 		setup-apkrepos\
 		setup-ntp\
 		setup-cryptswap\

setup-alpine.in

@@ -88,7 +88,9 @@ NTPOPTS="-c openntpd"
 DISKOPTS="-m data /dev/sda"
 
 # Setup in /media/sdb1
-APKLBUOPTS="-m sdb1"
+LBUOPTS="/media/sdb1"
+APKCACHEOPTS="/media/sdb1/cache"
+
 __EOF__
 	echo "Answer file $CREATEANSWERFILE has been created.  Please add or remove options as desired in that file"
 	exit 0
@@ -155,5 +157,6 @@ DEFAULT_DISK=none \
 	$PREFIX/sbin/setup-disk -q ${DISKOPTS}
 
 if [ "`cat /tmp/alpine-install-diskmode.out`" != "sys" ]; then
-	$PREFIX/sbin/setup-apklbu -i ${APKLBUOPTS}
+	$PREFIX/sbin/setup-lbu ${LBUOPTS}
+	$PREFIX/sbin/setup-apkcache ${APKCACHEOPTS}
 fi

setup-apkcache.in

+#!/bin/sh
+
+PREFIX=
+
+. "$PREFIX/lib/libalpine.sh"
+
+usage() {
+        cat <<__EOF__
+usage: setup-apkcache [-h] [DIR]
+
+Setup apk caching.
+
+If DIR is not specified user will be asked for location.
+
+options:
+ -h  Show this help 
+__EOF__
+        exit 1
+}
+
+is_mounted() {
+	awk '{print $2}' /proc/mounts | grep -q "^$1$"
+}
+
+# figure out mount point
+find_mount_point() {
+	local dir="$1"
+	while ! [ -d "$dir" ]; do
+		dir=${dir%/*}
+	done
+	local fs_id=$(stat -f -c %i "$dir")
+	local parent="${dir%/*}"
+	while [ -n "$parent" ] && [ "$(stat -f -c %i $parent)" = "$fs_id" ]; do
+		dir=$parent
+		parent=${parent%/*}
+	done
+	[ -z "$dir" ] && dir=/
+	echo $dir
+}
+
+get_mount_opts() {
+	local mnt="$1"
+	awk "\$2 == \"$mnt\" {gsub(/,/, \" \", \$4); print \$4}" /proc/mounts
+}
+
+is_mounted_ro() {
+	local mnt="$1"
+	local opts=$(get_mount_opts $mnt)
+	local opt=
+	for opt in $opts; do
+		if [ "$opt" = "ro" ]; then
+			return 0
+		fi
+	done
+	return 1
+}
+
+while getopts "h" opt; do
+        case $opt in
+		h) usage;;
+        esac
+done
+shift $(( $OPTIND - 1 ))
+
+# try auto detetect what we suggest
+suggestion=
+if [ -L /etc/apk/cache ]; then
+	suggestion=$(readlink $suggestion)
+
+if [ -z "$suggestion" ] && [ -f /etc/lbu/lbu.conf ]; then
+	. /etc/lbu/lbu.conf
+	if [ -n "$LBU_MEDIA" ]; then
+		suggestion=/media/$LBU_MEDIA/cache
+	fi
+fi
+
+if [ -z "$suggestion" ] && [ -L /dev/usbdisk ]; then
+	suggestion=/media/usb/cache
+fi
+
+if [ -z "$suggestion" ]; then
+	suggestion=none
+fi
+cachedir=$1
+
+while [ -z "$cachedir" ]; do
+	echo -n "Where would you like to store apk cache? (or none) [$suggestion] "
+	default_read cachedir $suggestion
+done
+
+if [ "$cachedir" = "none" ]; then
+	exit 0
+fi
+
+mount=$(find_mount_point $cachedir)
+
+cleanup=
+
+if ! is_mounted $mount; then
+	mount $mount || exit 1
+	cleanup="umount"
+elif is_mounted_ro $mount; then
+	mount -o remount,rw $mount || exit 1
+	cleanup="remount"
+fi
+
+mkdir -p $cachedir
+if [ -L /etc/apk/cache ]; then
+	rm -f /etc/apk/cache
+fi
+ln -s $cachedir /etc/apk/cache
+
+case "$cleanup" in
+	umount) umount $mount;;
+	remount) mount -o remount,ro $mount;;
+esac
+

setup-apklbu.in

-#!/bin/sh
-
-PREFIX=
-
-. "$PREFIX/lib/libalpine.sh"
-
-usage() {
-        cat <<__EOF__
-usage: setup-apklbu [-hi] [-m relative mountpoint]
-
-Setup apk caching and lbu settings.
-
-options:
- -h  Show this help
- -i  Run in installer mode (usually only when called by setup-alpine)
- -m  Specify mountpoint under /media for lbu backups (default is usb)
-__EOF__
-        exit 1
-}
-
-
-while getopts "im:h" opt; do
-        case $opt in
-                i) VERBOSE="1";;
-		h) usage;;
-		m) MOUNTPOINT="$OPTARG";;
-        esac
-done
-
-if [ "$VERBOSE" = "1" ]; then
-	echo "Setup apk caching and lbu? (y/N)"
-	default_read setupapklbu
-	if [ "$setupapklbu" = "N" ] || [ "$setupapklbu" = "n" ]; then 
-		exit 0
-	fi
-	if [ -z $MOUNTPOINT ]; then
-		MOUNTPOINT="usb"
-		echo "Please enter mountpoint directory under /media for lbu [$MOUNTPOINT]:"
-		default_read MOUNTPOINT "$MOUNTPOINT"
-	fi
-fi
-
-if [ -z $MOUNTPOINT ]; then
-	MOUNTPOINT="usb"
-fi
-
-mountstatus="`mount | grep /media/${MOUNTPOINT}`"
-
-if [ -z $mountstatus ]; then
-	echo "$MOUNTPOINT is not mounted" && exit 1
-fi
-
-readwritestatus="`echo $mountstatus | awk -F '(' '{print $2}' | awk -F ',' '{print $1}'`"
-
-if [ "$readwritestatus" = "ro" ]; then
-	rewrite=1
-fi
-
-if [ "$rewrite" = 1 ]; then
-	mount -o remount,rw /media/${MOUNTPOINT} || die "Failed to remount media rw"
-fi
-
-mkdir -p /media/${MOUNTPOINT}/cache || die "Failed to create /media/${MOUNTPOINT}/cache"
-ln -s /media/${MOUNTPOINT}/cache /etc/apk/cache || die "Failed to create apk cache softlink"
-apk cache sync
-cat > /etc/lbu/lbu.conf <<EOF
-# what cipher to use with -e option
-DEFAULT_CIPHER=aes-256-cbc
-
-# Uncomment the row below to encrypt config by default
-# ENCRYPTION=$DEFAULT_CIPHER
-
-# Uncomment below to avoid <media> option to 'lbu commit'
-# Can also be set to 'floppy'
-LBU_MEDIA=$MOUNTPOINT
-
-# Uncomment below to let lbu make up to 3 backups
-# BACKUP_LIMIT=3
-EOF
-lbu package /media/"$MOUNTPOINT" || die "Failed to lbu apkovl on /media/${MOUNTPOINT}"
-sync
-if [ "$rewrite" = 1 ]; then
-	mount -o remount,ro /media/${MOUNTPOINT} || die "Failed to remount media ro"
-fi