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vault-patch/main.go

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package main
import (
"fmt"
"os"
"github.com/hashicorp/vault/api"
homedir "github.com/mitchellh/go-homedir"
"github.com/sirupsen/logrus"
"github.com/Luzifer/go_helpers/v2/env"
"github.com/Luzifer/rconfig/v2"
)
var (
cfg struct {
LogLevel string `flag:"log-level" default:"info" description:"Verbosity of logs to use (debug, info, warning, error, ...)"`
VaultAddress string `flag:"vault-addr" env:"VAULT_ADDR" default:"https://127.0.0.1:8200" description:"Vault API address"`
VaultToken string `flag:"vault-token" env:"VAULT_TOKEN" vardefault:"vault-token" description:"Specify a token to use instead of app-id auth"`
VersionAndExit bool `flag:"version" default:"false" description:"Print program version and exit"`
}
version = "dev"
)
func vaultTokenFromDisk() string {
vf, err := homedir.Expand("~/.vault-token")
if err != nil {
return ""
}
data, err := os.ReadFile(vf) //#nosec G304 // Intended to load file from disk
if err != nil {
return ""
}
return string(data)
}
func initApp() (err error) {
rconfig.SetVariableDefaults(map[string]string{"vault-token": vaultTokenFromDisk()})
rconfig.AutoEnv(true)
if err = rconfig.Parse(&cfg); err != nil {
return fmt.Errorf("parsing CLI options: %w", err)
}
logLevel, err := logrus.ParseLevel(cfg.LogLevel)
if err != nil {
return fmt.Errorf("parsing log level: %w", err)
}
logrus.SetLevel(logLevel)
return nil
}
func main() {
var err error
if err = initApp(); err != nil {
logrus.WithError(err).Fatal("initializing app")
}
if cfg.VersionAndExit {
fmt.Printf("vault-patch %s\n", version) //nolint:forbidigo
os.Exit(0)
}
if len(rconfig.Args()) < 2 { //nolint:gomnd
logrus.Fatal("Usage: vault-patch [options] <path> <data>")
}
client, err := api.NewClient(&api.Config{
Address: cfg.VaultAddress,
})
if err != nil {
logrus.WithError(err).Fatal("creating Vault client")
}
client.SetToken(cfg.VaultToken)
key := rconfig.Args()[1]
s, err := client.Logical().Read(key)
if err != nil || s == nil {
logrus.WithError(err).Fatal("reading key from vault")
}
data := s.Data
if data == nil {
data = make(map[string]any)
}
for k, v := range env.ListToMap(rconfig.Args()[2:]) {
data[k] = v
}
if _, err := client.Logical().Write(key, data); err != nil {
logrus.WithError(err).Fatal("writing data to key")
}
logrus.Print("data successfully written to key")
}