apk-tools Code

#!/bin/sh

#fetch routines

# wget fetcher 
wget_fetch() {
	local qflag
	[ ! "$VERBOSE" ] && qflag="-q"
	wget $qflag -P $2 $1
}

# local filesystem "fetcher"
cp_fetch() {
	local src dest=$2
	src=`echo $uri | sed 's|^[a-z]*:/||'`
	[ "$VERBOSE" ] && eecho "$src -> $dest"
	cp $1 $2
}

# local mount "fetcher"
mnt_fetch() {
	local src uri=$1 dest=$2
	local wasmounted=`mount | grep "$MNT"`
	if [ -z "$wasmounted" ] ; then
		mount $MNT || return 1
	fi
	src=`echo $uri | sed 's|^.*:/|'$MNT'/|'`
	[ "$VERBOSE" ] && eecho "$uri -> $dest"
	cp $src $dest
	
	[ -z "$wasmounted" ] && umount $MNT
}

# fetcher for rsync
rsync_fetch() {
	local vflag
	[ "$VERBOSE" ] && vflag="-v"
	rsync $vflag $1 $2
}

# look for an executable in PATH
find_exe() {
	local i oifs=$IFS
	IFS=:
	for i in $PATH ; do
		IFS=$oifs
		[ -x "$i/$1" ] && return
		IFS=:
	done
	IFS=$oifs
	return 1
}

# search for mount point in fstab
find_mnt() {
	MNT=`awk '{print $2}' /etc/fstab | grep $1`
	[ -z "$MNT" ] && return 1
}


fetch() {
	is_uri "$1" || die "'$1' is not a valid URI. Please verify APK_PATH and INDEX_URI."
	local scheme=`get_uri_scheme $1`
	case "$scheme" in
		file)	fetcher=cp_fetch;;
		http)	find_exe wget && fetcher=wget_fetch;;
		ftp)	find_exe wget && fetcher=wget_fetch;;
		rsync)	find_exe rsync && fetcher=rsync_fetch;;
		*)	find_mnt "$scheme" && fetcher=mnt_fetch;;
	esac
	[ -z "$fetcher" ] && die "URI scheme '$scheme' is not supported."
	$fetcher $1 $2
}