67 lines
1.8 KiB
Go
67 lines
1.8 KiB
Go
package shared
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import (
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"github.com/jnovack/flag"
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"log"
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"os"
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"strings"
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)
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type Config struct {
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Verbose bool
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Domain string
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SOAFqdn string
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HostExpirationDays int
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ListenFrontend string
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ListenBackend string
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RedisHost string
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CustomTemplatePath string
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fs *flag.FlagSet
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}
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func (c *Config) Initialize() {
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fs := flag.NewFlagSetWithEnvPrefix(os.Args[0], "DDNS", 0)
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fs.StringVar(&c.Domain, "domain", "",
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"The subdomain which should be handled by DDNS")
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fs.StringVar(&c.SOAFqdn, "soa_fqdn", "",
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"The FQDN of the DNS server which is returned as a SOA record")
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fs.StringVar(&c.ListenBackend, "listen-backend", ":8053",
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"Which socket should the backend web service use to bind itself")
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fs.StringVar(&c.ListenFrontend, "listen-frontend", ":8080",
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"Which socket should the frontend web service use to bind itself")
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fs.StringVar(&c.CustomTemplatePath, "custom-template-path", "",
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"A path to a custom `index.html` file that will be used instead of the default frontend template")
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fs.StringVar(&c.RedisHost, "redis-host", ":6379",
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"The Redis socket that should be used")
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fs.IntVar(&c.HostExpirationDays, "expiration-days", 10,
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"The number of days after a host is released when it is not updated")
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fs.BoolVar(&c.Verbose, "verbose", false,
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"Be more verbose")
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c.fs = fs
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}
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func (c *Config) Validate() {
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if err := c.fs.Parse(os.Args[1:]); err != nil {
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log.Fatalf("Error parsing configuration: %v", err)
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}
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if c.Domain == "" {
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log.Fatal("You have to supply the domain via env variable DDNS_DOMAIN or command line flag --domain=DOMAIN")
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} else if !strings.HasPrefix(c.Domain, ".") {
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// get the domain in the right format
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c.Domain = "." + c.Domain
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}
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if c.SOAFqdn == "" {
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log.Fatal("You have to supply the server FQDN via env variable DDNS_SOA_FQDN or command line flag --soa_fqdn=FQDN")
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}
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}
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