bup-import-rsnapshot.sh

#!/bin/sh
# bup-import-rsnapshot.sh

# Does an import of a rsnapshot archive.

# testing wrapper function for bup
bup() {
	echo "$@"
}

usage() {
	echo "Usage: bup import-rsnapshot <path to rsnapshot's snapshot_root>"
	exit -1
}

[ "$#" -eq 1 ] || usage

if [ ! -e "$1/." ]; then
	echo "$1 isn't a directory!"
	exit -1
fi

ABSPATH=`readlink -f "$1"`

for SNAPSHOT in "$ABSPATH/"*; do
	if [ -e "$SNAPSHOT/." ]; then
		for BRANCH_PATH in "$SNAPSHOT/"*; do
			if [ -e "$BRANCH_PATH/." ]; then
				# Get the snapshot's ctime
				DATE=`stat -c %Z "$BRANCH_PATH"`
				BRANCH=`basename "$BRANCH_PATH"`

				# the echos are only for testing
				bup index -ux \
					--strip-path=\"$BRANCH_PATH\" \
					\"$BRANCH_PATH/\"
				bup save \
					--strip-path=\"$BRANCH_PATH\" \
					--date=\"$DATE\"\
					-n \"$BRANCH\" \
					\"$BRANCH_PATH/\"
			fi
		done
	fi
done

You shouldn't use "-d $filename"; use "-e $filename/." instead. Otherwise symlinks won't work as expected.

Rather than using the "echo" lines for testing, I recommend adding a shell function at the top: bup() { echo "$@" } or something like that. Otherwise it's not a very good test at all, because you're quoting a bunch of stuff differently than you would in real life.

Why do you need the readlink above? bup already knows how to handle symlinks nicely. Just make sure you use the $1/. trick.

Note that bup subcommands can be shell scripts; just put any script into bup/cmd/bup-import-rsnapshot and it should work.