Git diff driver for Anki decks

.gitattributes_global

*.apkg diff=apkg

.gitconfig

[core]
  attributesfile = ~/.gitattributes_global
[diff "apkg"]
  textconv = ~/bin/apkg-conv.sh
  cachetextconv = true

apkg-conv.sh

#!/bin/bash
set -o errexit

package_path="$1"

# Temp file
database_path="$(mktemp)"
function cleanup { rm -f "$database_path"; }; trap cleanup EXIT

# Filenames and checksums of package contents
unzip -lv "$package_path" | grep --invert-match '^Archive:\s'
echo

# Database dump
unzip -p "$package_path" 'collection.anki2' > "$database_path"
sqlite3 "$database_path" '.dump'

exit