String 如何读取外部变量

我试图读取由

--configFile=“”

作为外部参数发送的变量，但始终未找到错误，即使我传递了绝对路径

变量：

var (
    c                          Config
    conf                       = c.getConf()
    app                        = kingpin.New("exporter", "Exporter for Prometheus.")
    configFile                 = app.Flag("configFile", "Configuration file destination (/etc/exporter/config.yaml)").Default("/etc/exporter/config.yaml").String()
)

func (c *Config) getConf() *Config {

    yamlFile, err := ioutil.ReadFile(string(*configFile))
    if err != nil {
        log.Errorf("yamlFile.Get err   #%v ", err)
    }
    err = yaml.Unmarshal(yamlFile, c)
    if err != nil {
        log.Errorf("Unmarshal: %v", err)
    }
    return c
}

server:/etc/exporter # ./exporter --configFile="/etc/exporter/config.yaml"
ERRO[0000] yamlFile.Get err   #open : no such file or directory

total 14152
-rw------- 1 root root     1334 Sep 25 20:47 config.yaml
-rwxrwxr-x 1 root root 14466568 Sep 25 22:03 exporter

配置：

var (
    c                          Config
    conf                       = c.getConf()
    app                        = kingpin.New("exporter", "Exporter for Prometheus.")
    configFile                 = app.Flag("configFile", "Configuration file destination (/etc/exporter/config.yaml)").Default("/etc/exporter/config.yaml").String()
)

func (c *Config) getConf() *Config {

    yamlFile, err := ioutil.ReadFile(string(*configFile))
    if err != nil {
        log.Errorf("yamlFile.Get err   #%v ", err)
    }
    err = yaml.Unmarshal(yamlFile, c)
    if err != nil {
        log.Errorf("Unmarshal: %v", err)
    }
    return c
}

server:/etc/exporter # ./exporter --configFile="/etc/exporter/config.yaml"
ERRO[0000] yamlFile.Get err   #open : no such file or directory

total 14152
-rw------- 1 root root     1334 Sep 25 20:47 config.yaml
-rwxrwxr-x 1 root root 14466568 Sep 25 22:03 exporter

命令/输出：

var (
    c                          Config
    conf                       = c.getConf()
    app                        = kingpin.New("exporter", "Exporter for Prometheus.")
    configFile                 = app.Flag("configFile", "Configuration file destination (/etc/exporter/config.yaml)").Default("/etc/exporter/config.yaml").String()
)

func (c *Config) getConf() *Config {

    yamlFile, err := ioutil.ReadFile(string(*configFile))
    if err != nil {
        log.Errorf("yamlFile.Get err   #%v ", err)
    }
    err = yaml.Unmarshal(yamlFile, c)
    if err != nil {
        log.Errorf("Unmarshal: %v", err)
    }
    return c
}

server:/etc/exporter # ./exporter --configFile="/etc/exporter/config.yaml"
ERRO[0000] yamlFile.Get err   #open : no such file or directory

total 14152
-rw------- 1 root root     1334 Sep 25 20:47 config.yaml
-rwxrwxr-x 1 root root 14466568 Sep 25 22:03 exporter

ls-ltr:

var (
    c                          Config
    conf                       = c.getConf()
    app                        = kingpin.New("exporter", "Exporter for Prometheus.")
    configFile                 = app.Flag("configFile", "Configuration file destination (/etc/exporter/config.yaml)").Default("/etc/exporter/config.yaml").String()
)

func (c *Config) getConf() *Config {

    yamlFile, err := ioutil.ReadFile(string(*configFile))
    if err != nil {
        log.Errorf("yamlFile.Get err   #%v ", err)
    }
    err = yaml.Unmarshal(yamlFile, c)
    if err != nil {
        log.Errorf("Unmarshal: %v", err)
    }
    return c
}

server:/etc/exporter # ./exporter --configFile="/etc/exporter/config.yaml"
ERRO[0000] yamlFile.Get err   #open : no such file or directory

total 14152
-rw------- 1 root root     1334 Sep 25 20:47 config.yaml
-rwxrwxr-x 1 root root 14466568 Sep 25 22:03 exporter

在这里替换代码

与：

conf*Config

在这里替换代码

与：

p:=kingpin.MustParse（app.Parse（os.Args[1:]））
conf=c.getConf（）
开关p{

但是当我添加静态变量时，例如：

yaml File，err:=ioutil.ReadFile（“/etc/exporter/config.yaml”）

。脚本成功地执行了！您的问题是主销没有解析。您必须调用

kingpin.MustParse

。您能提供一个示例吗？添加了说明。可能，但我没有读过。