fix: add quotes to identifier with special character

Signed-off-by: jakezhu9 <[email protected]>

pkg/tools/gen/template.go

@@ -5,6 +5,7 @@ import (
 	_ "embed"
 	"fmt"
 	"io"
+	"regexp"
 	"strings"
 	"text/template"
 )
@@ -124,10 +125,15 @@ var kclKeywords = map[string]struct{}{
 	"rule":      {},
 }
 
+var validNameRegexp = regexp.MustCompile(`\$?^[a-zA-Z_][a-zA-Z0-9_]*$`)
+
 func formatName(name string) string {
 	if _, ok := kclKeywords[name]; ok {
 		return fmt.Sprintf("$%s", name)
 	}
+	if !validNameRegexp.MatchString(name) {
+		return fmt.Sprintf(`"%s"`, name)
+	}
 	return name
 }
 

pkg/tools/gen/testdata/yaml/identifier/expect.k

@@ -0,0 +1,39 @@
+"""
+This file was generated by the KCL auto-gen tool. DO NOT EDIT.
+Editing this file might prove futile when you re-run the KCL auto-gen generate command.
+"""
+
+identifier = {
+    "a-b" = "identifier with hyphen"
+    a_b = "identifier with underscore"
+    $if = "identifier with keyword"
+    "a/b" = "identifier with slash"
+    "a.b" = "identifier with dot"
+    "a#b" = "identifier with hash"
+    "a$b" = "identifier with dollar"
+    "a@b" = "identifier with at"
+    "a%b" = "identifier with percent"
+    "a*b" = "identifier with asterisk"
+    "a&b" = "identifier with ampersand"
+    "a(b" = "identifier with left parenthesis"
+    "a)b" = "identifier with right parenthesis"
+    "a,b" = "identifier with comma"
+    "a:b" = "identifier with colon"
+    "a;b" = "identifier with semicolon"
+    "a<b" = "identifier with less than"
+    "a>b" = "identifier with greater than"
+    "a=b" = "identifier with equal"
+    "a+b" = "identifier with plus"
+    "a\\b" = "identifier with backslash"
+    "a[b" = "identifier with left bracket"
+    "a]b" = "identifier with right bracket"
+    "a{b" = "identifier with left brace"
+    "a}b" = "identifier with right brace"
+    "a'b" = "identifier with single quote"
+    "a`b" = "identifier with back quote"
+    "a~b" = "identifier with tilde"
+    "a!b" = "identifier with exclamation"
+    "a?b" = "identifier with question"
+    "a|b" = "identifier with vertical bar"
+    "a^b" = "identifier with caret"
+}

pkg/tools/gen/testdata/yaml/identifier/input.yaml

@@ -0,0 +1,33 @@
+identifier:
+    a-b: "identifier with hyphen"
+    a_b: "identifier with underscore"
+    if: "identifier with keyword"
+    a/b: "identifier with slash"
+    a.b: "identifier with dot"
+    a#b: "identifier with hash"
+    a$b: "identifier with dollar"
+    a@b: "identifier with at"
+    a%b: "identifier with percent"
+    a*b: "identifier with asterisk"
+    a&b: "identifier with ampersand"
+    a(b: "identifier with left parenthesis"
+    a)b: "identifier with right parenthesis"
+    a,b: "identifier with comma"
+    a:b: "identifier with colon"
+    a;b: "identifier with semicolon"
+    a<b: "identifier with less than"
+    a>b: "identifier with greater than"
+    a=b: "identifier with equal"
+    a+b: "identifier with plus"
+    a\\b: "identifier with backslash"
+    a[b: "identifier with left bracket"
+    a]b: "identifier with right bracket"
+    a{b: "identifier with left brace"
+    a}b: "identifier with right brace"
+    a'b: "identifier with single quote"
+    a`b: "identifier with back quote"
+    a~b: "identifier with tilde"
+    a!b: "identifier with exclamation"
+    a?b: "identifier with question"
+    a|b: "identifier with vertical bar"
+    a^b: "identifier with caret"