mv-merge

#!/bin/bash
#
# Moves the entire contents of one directory to another, even if some
# subdirectories are common to both source and destination directories.
#
# Uses rsync and rm-src-dups.
#
# Adam Spiers <me@adamspiers.org>
#

set -e
me=`basename $0`

usage () {
    # Call as: usage [EXITCODE] [USAGE MESSAGE]
    exit_code=1
    if [[ "$1" == [0-9] ]]; then
        exit_code="$1"
        shift
    fi
    if [ -n "$1" ]; then
        echo "$*" >&2
        echo
    fi

    cat <<EOF >&2
Usage: $me [OPTIONS] SRC [SRC ...] DESTDIR

SRCs should be relative to the current directory.
DESTDIR can be relative or absolute.

Options (must be in order specified above!)
   -f              Force overwrites of existing files in dest tree
                   (does not overwrite by default)
   -u              Update existing files in dest tree only if source is newer
   -n, --dry-run   Don't actually do anything.
EOF
    exit "$exit_code"
}

parse_opts () {
    overwrite="--ignore-existing"

    while [ $# != 0 ]; do
        case "$1" in
            -h|--help)
                usage 0
                ;;
            -n|--dry-run)
                dry_run=--dry-run
                shift
                ;;
            -f)
                overwrite=""
                shift
                ;;
            -u)
                # takes precedence over -f
                overwrite="--update"
                shift
                ;;
            -*)
                usage "Unrecognized option $1"
                ;;
            *)
                break
                ;;
        esac
    done

    if [ $# -lt 2 ]; then
        usage "Need at least two parameters"
    fi

    srcs=( "${@:1:$(($#-1))}" )
    dst="${@: -1:1}"

    if ! [ -d "$dst" ]; then
        usage "$dst is not a directory"
    fi
}

if ! which rsync 2>&1 >/dev/null; then
    echo "rsync must be on \$PATH for $me to work." >&2
    exit 1
fi

parse_opts "$@"

abs_cwd=`pwd`
for src in "${srcs[@]}"; do
    echo rsync -Rav --link-dest=\""$abs_cwd"\" $dry_run $overwrite \""$src"\" \""$dst"\"
    rsync -Rav --link-dest="$abs_cwd" $dry_run $overwrite "$src" "$dst"

    echo
    echo rm-src-dups -vv $dry_run -s \""$src"\" . \""$dst"\"
    [ -d "$dst/$src" ] && rm-src-dups -vv $dry_run -s "$src" . "$dst"
done