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flags.go
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flags.go
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package main
import (
"io"
"os"
"github.com/google/uuid"
"github.com/urfave/cli/v2"
)
func envvarNames(s string) []string {
return []string{s, "BF_" + s}
}
// Flags
var (
namespace uuid.UUID
nsFlag = &cli.StringFlag{
Name: "namespace",
Usage: "namespace `UUID`",
Required: true,
Aliases: []string{"ns"},
EnvVars: envvarNames("NS"),
Action: func(_ *cli.Context, ns string) (err error) {
namespace, err = uuid.Parse(ns)
return err
},
}
caCertUri string
caCertFlag = &cli.StringFlag{
Name: "ca-certificate",
Usage: "read CA certificate from `FILE`",
Aliases: []string{"ca-cert"},
EnvVars: envvarNames("CA_CERT"),
TakesFile: true,
Value: "cert.pem",
Destination: &caCertUri,
}
caPrivKeyUri string
caPrivKeyFlag = &cli.StringFlag{
Name: "ca-private-key",
Usage: "read CA private key from `FILE`",
Aliases: []string{"ca-key"},
EnvVars: envvarNames("CA_PRIVKEY"),
TakesFile: true,
Value: "key.pem",
Destination: &caPrivKeyUri,
}
outputFile string
outputFlag = &cli.StringFlag{
Name: "output",
Usage: "write output to `FILE`",
Aliases: []string{"o"},
TakesFile: true,
Value: "-",
Destination: &outputFile,
}
)
func getOutputWriter() (io.Writer, error) {
if outputFile == "-" {
return os.Stdout, nil
}
return os.Create(outputFile)
}