synapsecns/sanguine

package commandline_test

import (
    "fmt"
    "github.com/ipfs/go-log"
    "github.com/synapsecns/sanguine/core/commandline"
    "github.com/urfave/cli/v2"
    "go.uber.org/zap/zapcore"
    "os"
)

var logger = log.Logger("synapse-logger-example")

func ExampleSetLogLevel() {
    app := cli.NewApp()
    app.Commands = cli.Commands{
        {
            Name:        "test",
            Description: "I'm a test command",
            Flags: []cli.Flag{
                &commandline.LogLevel,
            },
            Action: func(c *cli.Context) error {
                commandline.SetLogLevel(c)
                logger.Debug("I won't be shown if level is set to warn")
                logger.Warn("I will be shown if level is set to warn")
                return nil
            },
        },
    }
    fmt.Printf("running ./example %s --%s %s", app.Commands[0].Name, commandline.LogLevel.Name, zapcore.WarnLevel.String())

    err := app.Run([]string{os.Args[0], app.Commands[0].Name, commandline.LogLevel.Name, zapcore.WarnLevel.String()})
    if err != nil {
        panic(err)
    }

    // output: running ./example test --log-level warn
}