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|
// package main provides a tool named sigsum-debug.
//
// Install as follows:
//
// $ go install -ldflags="-X 'main.someVersion=git commit $(git rev-list -1 HEAD)'"
//
// Usage:
//
// $ sigsum-debug help
//
package main
import (
"flag"
"fmt"
"log"
"os"
)
const usage = `sigsum-debug version %s
Usage:
sigsum-debug help
Outputs a usage message.
sigsum-debug genkey
Outputs a new private key.
sigsum-debug pubkey
Reads a private key from stdin and output its public key.
sigsum-debug hashkey
Reads a public key from stdin and output its key hash.
`
var (
someVersion = "unknown"
)
func main() {
log.SetFlags(0)
var err error
switch cmd := parseCommand(); cmd.Name() {
case "help":
cmd.Usage()
case "genkey":
err = CmdGenKey()
case "pubkey":
err = CmdPubKey()
case "hashkey":
err = CmdHashKey()
default:
err = fmt.Errorf("invalid command %q, try %q", cmd.Name(), "sigsum help")
}
if err != nil {
log.Printf("%s", err)
os.Exit(1)
}
}
func parseCommand() *flag.FlagSet {
args := os.Args
if len(args) < 2 {
args = append(args, "")
}
fs := flag.NewFlagSet(args[1], flag.ExitOnError)
fs.Usage = func() {
log.Printf(usage, someVersion)
}
registerOptions(fs)
fs.Parse(args[2:])
return fs
}
func registerOptions(fs *flag.FlagSet) {
switch cmd := fs.Name(); cmd {
default:
}
}
func registerStringOption(fs *flag.FlagSet, opt *string, short, long, value string) {
fs.StringVar(opt, short, value, "")
fs.StringVar(opt, long, value, "")
}
func registerUint64Option(fs *flag.FlagSet, opt *uint64, short, long string, value uint64) {
fs.Uint64Var(opt, short, value, "")
fs.Uint64Var(opt, long, value, "")
}
|
