cron is package that parses and expands cron expressions (see the Godoc for more on which features are supported).
Also provided is a command line which takes an expression as its only input and prints the expanded expression.
With a recent version of Go installed.
You can build the command with go build -o parse cmd/parse/main.go or run it
directly, e.g:
% go run cmd/parse/main.go "*/15 0 1,15 * 1-5 /usr/bin/find"
minute 0 15 30 45
hour 0
day of month 1 15
month 1 2 3 4 5 6 7 8 9 10 11 12
day of week 1 2 3 4 5
command /usr/bin/find
Tests can be run the same way as any other Go projects, e.g:
go test