sort : flags

sort/sort.go

@@ -2,8 +2,49 @@ package sort
 
 import (
 	"fmt"
+
+	"github.com/brtholomy/um/go/flags"
 )
 
-func Sort(args []string) {
-	fmt.Printf("args: %#v\n", args)
+type options struct {
+	Source flags.Flag[string]
+	Key    flags.Flag[string]
+	Help   flags.Flag[bool]
+}
+
+func initOpts() options {
+	return options{
+		flags.Flag[string]{"--source", "-s", "", "path to source list. reads from stdin if omitted."},
+		flags.Flag[string]{"--key", "-k", "", "path to sort key"},
+		flags.Flag[bool]{"--help", "-h", false, "show help"},
+	}
+}
+
+func parseArgs(args []string) options {
+	opts := initOpts()
+	for i, arg := range args {
+		switch {
+		case arg == opts.Source.Long || arg == opts.Source.Short:
+			if flags.MissingValueArg(args, i) {
+				flags.HelpMissingVal(arg)
+				break
+			}
+			opts.Source.Val = args[i+1]
+		case arg == opts.Key.Long || arg == opts.Key.Short:
+			if flags.MissingValueArg(args, i) {
+				flags.HelpMissingVal(arg)
+				break
+			}
+			opts.Key.Val = args[i+1]
+		case arg == opts.Help.Long || arg == opts.Help.Short:
+			flags.Help("tag", opts)
+			return opts
+		}
+	}
+	return opts
+}
+
+func Sort(args []string) {
+	opts := parseArgs(args)
+	fmt.Println(opts)
 }