feat: added cli command for previewing cron schedules

src/console/schedule/schedule.v

@@ -0,0 +1,34 @@
+module schedule
+
+import cli
+import cron.expression { parse_expression }
+
+// cmd returns the cli submodule for previewing a cron schedule.
+pub fn cmd() cli.Command {
+	return cli.Command{
+		name: 'schedule'
+		description: 'Preview the behavior of a cron schedule.'
+		flags: [
+			cli.Flag{
+				name: 'count'
+				description: 'How many scheduled times to show.'
+				flag: cli.FlagType.int
+				default_value: ['5']
+			},
+		]
+		execute: fn (cmd cli.Command) ? {
+			exp := parse_expression(cmd.args.join(' '))?
+
+			mut t := exp.next_from_now()?
+			println(t)
+
+			count := cmd.flags.get_int('count')?
+
+			for _ in 1 .. count {
+				t = exp.next(t)?
+
+				println(t)
+			}
+		}
+	}
+}

src/main.v

@@ -5,6 +5,7 @@ import server
 import cli
 import console.git
 import console.logs
+import console.schedule
 import cron
 
 fn main() {
@@ -27,6 +28,7 @@ fn main() {
 			git.cmd(),
 			cron.cmd(),
 			logs.cmd(),
+			schedule.cmd(),
 		]
 	}
 	app.setup()