zip up files not yet added to git (they should be data files or other residue)

zip-residue.sh

#!/bin/bash

# requires sponge from Debian(?) package moreutils

set -x

project=$(basename $(pwd))
date=$(date +%Y%m%d)
zipfile=${project}-${USER}-data-${date}.zip

zipargs=(
    --suffixes .gz:.bz2:.zip:.rar # these are stored without further compression
    --names-stdin                 # read files & directories to add from stdin
    --recurse-paths               # add contents of directories, too
    --symlinks                    # store them
    --test                        # test output after creating
    --move                        # remove files after zip file created & tested
)

git status --porcelain |
    grep '^[?][?] ' |         # keep only unknown files
    sed 's/^?? //' |          # (remove flags)
    sponge |                  # paranoia: prevent zip temporary file to be listed
  zip ${zipfile} "${zipargs[@]}"