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|
#!/bin/sh
PREFIX=@PREFIX@
: ${LIBDIR=$PREFIX/lib}
. "$LIBDIR/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 "^$1$"
}
find_fstab_mount_point() {
local dir="$1"
local res=
if ! [ -r "${ROOT}"etc/fstab ]; then
return
fi
while [ -n "$dir" ]; do
res=$(awk "\$2 == \"$dir\" {print \$2}" "${ROOT}"etc/fstab)
if [ -n "$res" ]; then
echo $res
return
fi
dir=${dir%/*}
done
}
# figure out mount point
find_mount_point() {
local dir="$(find_fstab_mount_point "$1")"
if [ -d "$dir" ] && [ "$dir" != "/" ]; then
echo $dir
return
fi
local dir="$1"
while [ -n "$dir" ] && ! [ -d "$dir" ]; do
dir=${dir%/*}
done
local fs_id="$(stat -f -c %i "${dir:-/}")"
local parent="${dir%/*}"
while [ -n "$dir" ] && [ "$(stat -f -c %i "$parent/")" = "$fs_id" ]; do
dir=$parent
parent=${parent%/*}
done
[ -z "$dir" ] && dir=/
echo $dir
}
# get device for a given mount point
get_dev_from_mountpoint() {
local mnt="$1"
local fstab="$2"
awk "\$2 == \"$mnt\" {print \$1}" "$fstab"
}
get_mount_opts_from_mountpoint() {
local mnt="$1"
local fstab="$2"
awk "\$2 == \"$mnt\" {gsub(/,/, \" \", \$4); print \$4}" "$fstab"
}
has_mount_opt() {
local searchfor="$1"
local mnt="$2"
local fstab="$3"
local opts="$(get_mount_opts_from_mountpoint "$mnt" "$fstab")"
local opt=
for opt in $opts; do
if [ "$opt" = "$searchfor" ]; then
return 0
fi
done
return 1
}
is_mounted_ro() {
has_mount_opt ro "$1" /proc/mounts
}
# get the fstype of the given mount point
mount_fstype() {
# we only want the last mount in case there are several
awk -v mnt="$1" '$2 == "/" {fstype = mnt} END {print fstype}' \
/proc/mounts
}
apk_cache_help() {
cat <<-__EOF__
Packages installed from network can be cached locally to be available during
boot, before the network is started. Specifying a directory here will make apk
cache the packages locally in this directory.
Enter 'none' if you do not want to cache packages from network.
__EOF__
}
while getopts "h" opt; do
case $opt in
h) usage 0;;
'?') usage "1" >&2;;
esac
done
shift $(( OPTIND - 1 ))
# try auto detetect what we suggest
suggestion=
if [ -L "${ROOT}"etc/apk/cache ]; then
suggestion=$(readlink "${ROOT}"etc/apk/cache)
fi
if [ -z "$suggestion" ] && [ -f "$ROOT"etc/lbu/lbu.conf ]; then
. "$ROOT"etc/lbu/lbu.conf
if [ -n "$LBU_MEDIA" ]; then
suggestion=/media/$LBU_MEDIA/cache
fi
fi
if [ -z "$suggestion" ] && [ -L /dev/usbdisk ]; then
suggestion=/media/usb/cache
fi
if [ -z "$suggestion" ] && [ "$(mount_fstype /)" != "tmpfs" ]; then
suggestion=/var/cache/apk
fi
if [ -z "$suggestion" ]; then
suggestion=none
fi
cachedir="$1"
resp=
while [ $# -eq 0 ] && [ -z "$cachedir" ]; do
ask "Enter apk cache directory (or '?' or 'none')" "$suggestion"
cachedir="$resp"
if [ "$cachedir" = "?" ]; then
apk_cache_help
cachedir=
fi
done
if [ "$cachedir" = "none" ]; then
exit 0
fi
case "$cachedir" in
/*) ;;
*) cachedir="${PWD#${ROOT%/}}/$cachedir";;
esac
mount=$(find_mount_point "$cachedir")
cleanup=
if ! is_mounted "$mount"; then
# remove noauto that setup-lbu might have added
if has_mount_opt noauto "$mount" /etc/fstab; then
fstabtmp=$(mktemp)
awk -v mnt="$mount" \
'$2 != mnt {print $0}
$2 == mnt {
sub(/noauto,|,noauto/, "", $4);
sub(/^noauto$/, "defaults", $4);
print $0
}' /etc/fstab > "$fstabtmp"
mv "$fstabtmp" /etc/fstab
fi
mount "$mount" || exit 1
elif is_mounted_ro "$mount"; then
mount -o remount,rw "$mount" || exit 1
cleanup="remount"
fi
mkdir -p "$ROOT$cachedir"
if [ -L "$ROOT"etc/apk/cache ]; then
rm -f "$ROOT"etc/apk/cache
fi
mkdir -p "$ROOT"etc/apk
ln -s "$cachedir" "$ROOT"etc/apk/cache
case "$cleanup" in
umount) umount "$mount";;
remount) mount -o remount,ro "$mount";;
esac
|
