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update help

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This commit is contained in:
Nazar Kanaev 2021-05-30 22:18:48 +01:00
parent 55262d38fe
commit 7cfd3b3238
1 changed files with 20 additions and 6 deletions
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26
src/main.go
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@ -17,7 +17,10 @@ import (
var Version string = "0.0"
var GitHash string = "unknown"
var OptList = make([]string, 0)
func opt(envVar, defaultValue string) string {
OptList = append(OptList, envVar)
value := os.Getenv(envVar)
if value != "" {
return value
@ -28,13 +31,24 @@ func opt(envVar, defaultValue string) string {
func main() {
var addr, db, authfile, certfile, keyfile, basepath, logfile string
var ver, open bool
flag.CommandLine.SetOutput(os.Stdout)
flag.Usage = func() {
out := flag.CommandLine.Output()
fmt.Fprintf(out, "Usage of %s:\n", os.Args[0])
flag.PrintDefaults()
fmt.Fprintln(out, "\nThe environmental variables can used to provide the default values:")
fmt.Fprintln(out, " ", strings.Join(OptList, ", "))
}
flag.StringVar(&addr, "addr", opt("YARR_ADDR", "127.0.0.1:7070"), "address to run server on")
flag.StringVar(&authfile, "auth-file", opt("YARR_AUTHFILE", ""), "path to a file containing username:password")
flag.StringVar(&basepath, "base", opt("YARR_BASE", ""), "base path of the service url")
flag.StringVar(&certfile, "cert-file", opt("YARR_CERTFILE", ""), "path to cert file for https")
flag.StringVar(&keyfile, "key-file", opt("YARR_KEYFILE", ""), "path to key file for https")
flag.StringVar(&db, "db", opt("YARR_DB", ""), "storage file path")
flag.StringVar(&logfile, "log-file", opt("YARR_LOGFILE", ""), "path to log file to use instead of stdout")
flag.StringVar(&basepath, "base", opt("YARR_BASE", ""), "base path of the service url (YARR_BASE env )")
flag.StringVar(&authfile, "auth-file", opt("YARR_AUTHFILE", ""), "`path` to a file containing username:password")
flag.StringVar(&certfile, "cert-file", opt("YARR_CERTFILE", ""), "`path` to cert file for https")
flag.StringVar(&keyfile, "key-file", opt("YARR_KEYFILE", ""), "`path` to key file for https")
flag.StringVar(&db, "db", opt("YARR_DB", ""), "storage file `path`")
flag.StringVar(&logfile, "log-file", opt("YARR_LOGFILE", ""), "`path` to log file to use instead of stdout")
flag.BoolVar(&ver, "version", false, "print application version")
flag.BoolVar(&open, "open", false, "open the server in browser")
flag.Parse()