/
args.go
93 lines (82 loc) · 1.8 KB
/
args.go
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package util
import (
"flag"
"fmt"
"os"
"strconv"
"strings"
)
const Separator = '='
var args map[string]string
func init() {
args = PickArgs()
}
// Use for pick up arguments into map, either `go run` or `go test`.
func PickArgs() map[string]string {
args := os.Args
if len(args) == 0 {
args = flag.Args()
}
m := make(map[string]string)
for _, arg := range args {
index := strings.IndexByte(arg, Separator)
if index != -1 {
k := arg[:index]
v := arg[index+1:]
k = strings.TrimPrefix(k, "-")
if _, existed := m[k]; ! existed {
m[k] = v
}
}
}
return m
}
func GetFromArgs(key string, defaultValueOrNone ... string) (value string) {
var ok bool
if value, ok = args[key]; ! ok {
if len(defaultValueOrNone) == 0 {
panic(fmt.Sprintf(`parameter "%s" MUST be required, like %s=...`, key, key))
}
value = strings.Join(defaultValueOrNone, " ")
}
return
}
func GetBoolFromArgs(key string, defaultValueOrNone ...bool) (value bool) {
var s string
if len(defaultValueOrNone) == 0 {
s = GetFromArgs(key)
} else {
s = GetFromArgs(key, strconv.FormatBool(defaultValueOrNone[0]))
}
b, err := strconv.ParseBool(s)
if err != nil {
return
}
return b
}
func GetIntFromArgs(key string, defaultValueOrNone ...int64) (value int64) {
var s string
if len(defaultValueOrNone) == 0 {
s = GetFromArgs(key)
} else {
s = GetFromArgs(key, strconv.FormatInt(defaultValueOrNone[0], 10))
}
i64, err := strconv.ParseInt(s, 10, 64)
if err != nil {
return
}
return i64
}
func GetUintFromArgs(key string, defaultValueOrNone ...uint64) (value uint64) {
var s string
if len(defaultValueOrNone) == 0 {
s = GetFromArgs(key)
} else {
s = GetFromArgs(key, strconv.FormatUint(defaultValueOrNone[0], 10))
}
u64, err := strconv.ParseUint(s, 10, 64)
if err != nil {
return
}
return u64
}