I'm writing a command line app in Go and want to specify a redis endpoint as a flag. I've added the following:
app.Flags = []cli.Flag{
cli.StringFlag{
Name: "redis, r",
Value: "127.0.0.1",
Usage: "redis host to listen to",
EnvVar: "REDIS_URL",
},
}
However, in my command, the flag is always blank:
return cli.Command{
Name: "listen",
Usage: "Listen to a stream",
Action: func(c *cli.Context) {
redisUrl := c.String("redis")
log.Printf("Connecting to redis: %s\n", redisUrl)
},
}
Invoked with:
./mantle-monitor --redis 127.0.0.1 listen
What am I doing wrong?
Flags defined in app.Flags
are accessed with the Context.Global*
methods.
You want
return cli.Command{
Name: "listen",
Usage: "Listen to a stream",
Action: func(c *cli.Context) {
redisUrl := c.GlobalString("redis")
log.Printf("Connecting to redis: %s\n", redisUrl)
},
}
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