2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
3 Copyright (C) 2016-2021 Sergey Matveev <stargrave@stargrave.org>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, version 3 of the License.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>.
18 // NNCP cron expression checker.
29 "github.com/gorhill/cronexpr"
30 "go.cypherpunks.ru/nncp/v7"
34 fmt.Fprintf(os.Stderr, nncp.UsageHeader())
35 fmt.Fprintf(os.Stderr, "nncp-cronexpr -- cron expression checker\n\n")
36 fmt.Fprintf(os.Stderr, "Usage: %s [-num XXX] CRON-EXPRESSION\n", os.Args[0])
42 num = flag.Uint("num", 10, "Number of future entries to print")
43 version = flag.Bool("version", false, "Print version information")
44 warranty = flag.Bool("warranty", false, "Print warranty information")
46 log.SetFlags(log.Lshortfile)
50 fmt.Println(nncp.Warranty)
54 fmt.Println(nncp.VersionGet())
58 expr, err := cronexpr.Parse(strings.Join(flag.Args(), " "))
63 fmt.Printf("Now:\t%s\n", now.UTC().Format(time.RFC3339Nano))
64 for n, t := range expr.NextN(now, *num) {
65 fmt.Printf("%d:\t%s\n", n, t.UTC().Format(time.RFC3339Nano))