Tool to extract diff from a wikibase instance

• Java 17
• Lombok plugin (Dev only)

You can create the jar with this command

./gradlew shadowJar
mv ./build/libs/wikidata-changes-*-all.jar wiki-changes.jar

then run it with

java -Xmx4g -jar ./wiki-changes.jar --date UTC_DATE_TOSEARCH --hdtsource YOUR_PREVIOUS_DUMP

• UTC_DATE_TOSEARCH is the date to search the changes, you can type java -jar ./wiki-changes.jar -T to get the current date.
• YOUR_PREVIOUS_DUMP is your previous HDT dump to diff/cat to the changes.
• -Xmx4g is here to specify the memory to allocate to the process, here 4GB, the diff/cat computation and the changes hdt creation can require a lot of memory.

the result will be in cache/result.hdt.