完善 wa init 命令参数检查

internal/app/appinit/appinit.go

@@ -7,8 +7,10 @@ import (
 	"io/fs"
 	"os"
 	"path/filepath"
+	"strings"
 	"text/template"
 	"time"
+	"unicode"
 
 	"wa-lang.org/wa/waroot"
 )
@@ -17,6 +19,13 @@ func InitApp(name, pkgpath string, update bool) error {
 	if name == "" {
 		return fmt.Errorf("init failed: <%s> is empty", name)
 	}
+	if !isValidAppName(name) {
+		return fmt.Errorf("init failed: <%s> is invalid name", name)
+	}
+
+	if !isValidPkgpath(pkgpath) {
+		return fmt.Errorf("init failed: <%s> is invalid pkgpath", pkgpath)
+	}
 
 	if !update {
 		if _, err := os.Lstat(name); err == nil {
@@ -114,3 +123,37 @@ func InitApp(name, pkgpath string, update bool) error {
 
 	return nil
 }
+
+func isValidAppName(s string) bool {
+	if s == "" || s[0] == '_' || (s[0] >= '0' && s[0] <= '9') {
+		return false
+	}
+	for _, c := range []rune(s) {
+		if c == '_' || (c >= '0' && c <= '9') || unicode.IsLetter(c) {
+			continue
+		}
+		return false
+	}
+	return true
+}
+
+func isValidPkgpath(s string) bool {
+	if s == "" || s[0] == '_' || (s[0] >= '0' && s[0] <= '9') {
+		return false
+	}
+	for _, c := range []rune(s) {
+		if c == '_' || c == '.' || c == '/' || (c >= '0' && c <= '9') {
+			continue
+		}
+		if unicode.IsLetter(c) {
+			continue
+		}
+		return false
+	}
+
+	var pkgname = s
+	if i := strings.LastIndex(s, "/"); i >= 0 {
+		pkgname = s[i+1:]
+	}
+	return isValidAppName(pkgname)
+}