This should take cron expression like 0 */6 0 * * /usr/bin/find
and output a table like the one below.
minute 0
hour 0 6 12 18
day of month 1
month 1 2 3 4 5 6 7 8 9 10 11 12
day of week 0 1 2 3 4 5 6
command /usr/bin/find
It supports * , - and / expressions. It's currently not supporting specials (like @yearly, @daily, etc) and ? in expressions (this is since it is only used in day of week / day of month, and I was getting out of scope/time)
Project is using gradle and kotlin, you will need to have JDK11 installed for this.
Run ./gradlew clean build to run the tests and build artifacts.
You can run the app itself in a few ways. You can open it in intelliJ and run Application.class (might need to add arguments to run configuration though)
Easier way would be to run it through gradle:
./gradlew run --args="'0 0 * * * /usr/bin/find'"
You can also build and run jar file like this:
./gradlew clean build
java -jar build/libs/cronparser-1.0-SNAPSHOT-all.jar '0 0 * * * /usr/bin/find'