refactor: urfave v3

vendor/github.com/urfave/cli/v3/completion.go

@@ -0,0 +1,68 @@
+package cli
+
+import (
+	"context"
+	"embed"
+	"fmt"
+	"sort"
+)
+
+const (
+	completionCommandName = "generate-completion"
+)
+
+var (
+	//go:embed autocomplete
+	autoCompleteFS embed.FS
+
+	shellCompletions = map[string]renderCompletion{
+		"bash": getCompletion("autocomplete/bash_autocomplete"),
+		"ps":   getCompletion("autocomplete/powershell_autocomplete.ps1"),
+		"zsh":  getCompletion("autocomplete/zsh_autocomplete"),
+		"fish": func(c *Command) (string, error) {
+			return c.ToFishCompletion()
+		},
+	}
+)
+
+type renderCompletion func(*Command) (string, error)
+
+func getCompletion(s string) renderCompletion {
+	return func(c *Command) (string, error) {
+		b, err := autoCompleteFS.ReadFile(s)
+		return string(b), err
+	}
+}
+
+func buildCompletionCommand() *Command {
+	return &Command{
+		Name:   completionCommandName,
+		Hidden: true,
+		Action: completionCommandAction,
+	}
+}
+
+func completionCommandAction(ctx context.Context, cmd *Command) error {
+	var shells []string
+	for k := range shellCompletions {
+		shells = append(shells, k)
+	}
+
+	sort.Strings(shells)
+
+	if cmd.Args().Len() == 0 {
+		return Exit(fmt.Sprintf("no shell provided for completion command. available shells are %+v", shells), 1)
+	}
+	s := cmd.Args().First()
+
+	if rc, ok := shellCompletions[s]; !ok {
+		return Exit(fmt.Sprintf("unknown shell %s, available shells are %+v", s, shells), 1)
+	} else if c, err := rc(cmd); err != nil {
+		return Exit(err, 1)
+	} else {
+		if _, err = cmd.Writer.Write([]byte(c)); err != nil {
+			return Exit(err, 1)
+		}
+	}
+	return nil
+}