/
flags.go
58 lines (52 loc) · 1.11 KB
/
flags.go
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package env
import (
"strings"
)
// ParseFlags parses (commandline) flags and returns them as key/value pairs.
// The following forms are permitted:
// -flag => just a boolean flag
// --flag => double dashes are also permitted
// -flag=x => single dash
// -flag x => single dash, no equal
func ParseFlags(args []string) map[string]any {
fs := map[string]any{}
flag := func(s string) (string, bool) {
switch {
case strings.HasPrefix(s, "--"):
return strings.TrimPrefix(s, "--"), true
case strings.HasPrefix(s, "-"):
return strings.TrimPrefix(s, "-"), true
default:
return "", false
}
}
var currName string
for _, arg := range args {
flag, ok := flag(arg)
if ok {
if currName != "" {
// prev is a bool flag
fs[currName] = true
currName = ""
}
//a new name
//see if there's a "="
if name, val, ok := strings.Cut(flag, "="); ok {
fs[name] = val
} else {
currName = flag
}
} else {
// a value
if currName != "" {
fs[currName] = arg
currName = ""
}
//else just an arg
}
}
if currName != "" {
fs[currName] = true
}
return fs
}