如何获取 Go 标志包以接受表单的标志名称 --telemetry.addr

Question

我需要编写一段代码来接受参数"--telemetry.addr=8080"和"--telemetry.path=/metrics"，格式专门像这样。

我的代码：

package main
import (
"flag"
"fmt"
"net/http"
"os"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/prometheus/common/log"
)
var portNumber = flag.String("-telementry.addr", "8080", "a string denoting what port number the data should be accessible at.")
var endpoint = flag.String("-telemetry.path", "/metrics", "a string denoting what endpoint the data should be accessible at.")
func main() {
log.Info(os.Args[1])
log.Info(os.Args[2])
flag.Parse()
http.Handle("/"+*endpoint, promhttp.Handler())
log.Info("Endpoint set to " + *endpoint)
log.Info("Beginning to serve on port :" + *portNumber)
fmt.Printf("Test %s %s", *endpoint, *portNumber)
log.Fatal(http.ListenAndServe(":"+*portNumber, nil))
}

给我输出：

JORDYT-MBP:array-exporter jordy$ go run array-exporter.go --telemetry.addr=8080 --telemetry.path=/metrics
INFO[0000] --telemetry.addr=8080                         source="array-exporter.go:17"
INFO[0000] --telemetry.path=/metrics                     source="array-exporter.go:18"
flag provided but not defined: -telemetry.addr
Usage of /var/folders/mv/466rq_qj7zj9ywd11w4t8wc00000gp/T/go-build765060090/b001/exe/array-exporter:
--telementry.addr string
a string denoting what port number the data should be accessible at. (default "8080")
--telemetry.path string
a string denoting what endpoint the data should be accessible at. (default "/metrics")
exit status 2

不管我对国旗做了什么。字符串行，我似乎无法欺骗它接受以"--"开头的东西

Answer 1

标志参数不接受"-"。您应该做的是从标志调用中删除连字符

var portNumber = flag.String("telemetry.addr", "8080", "a string denoting what port number the data should be accessible at.")
var endpoint = flag.String("telemetry.path", "/metrics", "a string denoting what endpoint the data should be accessible at.")

您可以通过添加双连字符来执行二进制文件，如下所示

go build --telemenary.addr=8080 --telemetry.path=metrics