mirror of
https://github.com/Luzifer/envrun.git
synced 2024-12-20 18:31:17 +00:00
122 lines
3.3 KiB
Go
122 lines
3.3 KiB
Go
package main
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import (
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"fmt"
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"os"
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"os/exec"
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"strings"
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log "github.com/sirupsen/logrus"
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"github.com/Luzifer/go_helpers/v2/env"
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"github.com/Luzifer/rconfig/v2"
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)
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var (
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cfg = struct {
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CleanEnv bool `flag:"clean" default:"false" description:"Do not pass current environment to child process"`
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EncryptionMethod string `flag:"encryption" default:"openssl-md5" description:"Encryption method used for encrypted env-file (Available: gpg-symmetric, openssl-md5, openssl-sha256)"`
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EnvFile string `flag:"env-file" default:".env" description:"Location of the environment file"`
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LogLevel string `flag:"log-level" default:"info" description:"Log level (debug, info, warn, error, fatal)"`
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PasswordFile string `flag:"password-file" default:"" description:"Read encryption key from file"`
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Password string `flag:"password,p" default:"" env:"PASSWORD" description:"Password to decrypt environment file"`
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VersionAndExit bool `flag:"version" default:"false" description:"Prints current version and exits"`
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}{}
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version = "dev"
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)
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func initApp() error {
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if err := rconfig.ParseAndValidate(&cfg); err != nil {
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return fmt.Errorf("parsing cli options: %w", err)
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}
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l, err := log.ParseLevel(cfg.LogLevel)
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if err != nil {
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return fmt.Errorf("parsing log-level: %w", err)
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}
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log.SetLevel(l)
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return nil
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}
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func main() {
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var err error
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if err = initApp(); err != nil {
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log.WithError(err).Fatal("intitializing app")
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}
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if cfg.VersionAndExit {
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fmt.Printf("envrun %s\n", version) //nolint:forbidigo
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os.Exit(0)
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}
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if cfg.Password == "" && cfg.PasswordFile != "" {
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if _, err := os.Stat(cfg.PasswordFile); err == nil {
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data, err := os.ReadFile(cfg.PasswordFile)
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if err != nil {
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log.WithError(err).Fatal("Unable to read password from file")
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}
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cfg.Password = strings.TrimSpace(string(data))
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}
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}
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dec, err := decryptMethodFromName(cfg.EncryptionMethod)
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if err != nil {
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log.WithError(err).Fatal("Could not load decrypt method")
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}
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pairs, err := loadEnvFromFile(cfg.EnvFile, cfg.Password, dec)
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if err != nil {
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log.WithError(err).Fatal("Could not load env file")
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}
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childenv := env.ListToMap(os.Environ())
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if cfg.CleanEnv {
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childenv = map[string]string{}
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}
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for k, v := range pairs {
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childenv[k] = v
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}
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if len(rconfig.Args()) < 2 { //nolint:gomnd
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log.Fatal("No command specified")
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}
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c := exec.Command(rconfig.Args()[1], rconfig.Args()[2:]...) //#nosec:G204 // Intended to run cmd from input
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c.Env = env.MapToList(childenv)
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c.Stdout = os.Stdout
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c.Stderr = os.Stderr
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c.Stdin = os.Stdin
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err = c.Run()
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switch err.(type) {
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case nil:
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log.Info("Process exitted with code 0")
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os.Exit(0)
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case *exec.ExitError:
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log.Error("Unclean exit with exit-code != 0")
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os.Exit(1)
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default:
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log.WithError(err).Error("An unknown error occurred")
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os.Exit(2) //nolint:gomnd
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}
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}
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func loadEnvFromFile(filename, passphrase string, decrypt decryptMethod) (map[string]string, error) {
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body, err := os.ReadFile(filename) //#nosec:G304 // Intended to read a variable env file
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if err != nil {
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return nil, fmt.Errorf("reading env-file: %w", err)
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}
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if passphrase != "" {
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if body, err = decrypt(body, passphrase); err != nil {
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return nil, fmt.Errorf("decrypting env-file: %w", err)
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}
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}
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return env.ListToMap(strings.Split(string(body), "\n")), nil
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}
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