Context retrieved from cobra subcommand is empty

Question content

I want a global timeout (set in rootCmd), so I set it in rootCmd is set as follows

ctxInit := context.Background()
timeout := viper.GetInt("timeout")
ctx, cancel := context.WithTimeout(ctxInit, time.Duration(timeout)*time.Second)
defer cancel()
cmd.SetContext(ctx)

Then in the subcommand

ctx := rootCmd.Context()

But ctx is context.emptyCtx {}

Am I doing something wrong in setting/retrieving the context?

edit

My rootCmd Statement

// rootCmd represents the base command when called without any subcommands
var rootCmd = &cobra.Command{
    Use:              "my-cli",
    TraverseChildren: true,
    Short:            "cli",
    PersistentPreRunE: func(cmd *cobra.Command, _ []string) error {
        var err error
        logger, err = logging.InitialiseLogger(*logLevel, *logFormat)
        if err != nil {
            return err
        }
        if err := viper.BindPFlags(cmd.Flags()); err != nil {
            return fmt.Errorf("error binding flags to %s command: %w\n", cmd.Name(), err)
        }
        if err := cloneMethodValidator(cmd); err != nil {
            return err
        }
        if err := InitConfig(false); err != nil {
            logger.Fatal("ERROR initiating configuration:\n", err)
        }
        ctxInit := context.Background()
        timeout := viper.GetInt("timeout")
        ctx, cancel := context.WithTimeout(ctxInit, time.Duration(timeout)*time.Second)
        defer cancel()
        cmd.SetContext(ctx)
        return nil
    },
}

Correct answer

As @Peter mentioned, cmd and rootCmd are not the same. The Cobra documentation describes PersistentPreRun(E):

So cmd.SetContext(ctx) does not set the context of rootCmd, but sets the context of the subcommand.

Then in the subcommand you can use:

ctx := cmd.Context()

instead of rootCmd.Context().

The above is the detailed content of Context retrieved from cobra subcommand is empty. For more information, please follow other related articles on the PHP Chinese website!