Fix: don't create templateBody node from PUG

PUG has been not supported yet.

Author: mysticatea

src/index.ts

@@ -41,6 +41,15 @@ function isScriptElement(node: AST.VNode): node is AST.VElement {
     return node.type === "VElement" && node.name === "script"
 }
 
+/**
+ * Check whether the attribute node is a `lang` attribute.
+ * @param attribute The attribute node to check.
+ * @returns `true` if the attribute node is a `lang` attribute.
+ */
+function isLang(attribute: AST.VAttribute | AST.VDirective): attribute is AST.VAttribute {
+    return attribute.directive === false && attribute.key.name === "lang"
+}
+
 /**
  * Parse the given source code.
  * @param code The source code to parse.
@@ -66,6 +75,8 @@ export function parseForESLint(code: string, options: any): AST.ESLintExtendedPr
         const locationCalcurator = new LocationCalculator(tokenizer.gaps, tokenizer.lineTerminators)
         const script = rootAST.children.find(isScriptElement) as AST.VElement | undefined // https://github.com/Microsoft/TypeScript/issues/7657
         const template = rootAST.children.find(isTemplateElement) as AST.VElement | undefined
+        const templateLangAttr = template && template.startTag.attributes.find(isLang) as AST.VAttribute | undefined
+        const templateLang = (templateLangAttr && templateLangAttr.value && templateLangAttr.value.value) || "html"
         const concreteInfo: AST.HasConcreteInfo = {
             tokens: rootAST.tokens,
             comments: rootAST.comments,
@@ -75,7 +86,7 @@ export function parseForESLint(code: string, options: any): AST.ESLintExtendedPr
         result = (script != null)
             ? parseScriptElement(script, locationCalcurator, options)
             : parseScript("", options)
-        result.ast.templateBody = (template != null)
+        result.ast.templateBody = (template != null && templateLang === "html")
             ? Object.assign(template, concreteInfo)
             : undefined
     }

test/fixtures/ast/pug/ast.json

@@ -0,0 +1,23 @@
+{
+    "type": "Program",
+    "start": 0,
+    "end": 0,
+    "loc": {
+        "start": {
+            "line": 1,
+            "column": 0
+        },
+        "end": {
+            "line": 1,
+            "column": 0
+        }
+    },
+    "range": [
+        0,
+        0
+    ],
+    "body": [],
+    "sourceType": "script",
+    "comments": [],
+    "tokens": []
+}

test/fixtures/ast/pug/source.vue

@@ -0,0 +1,3 @@
+<template lang="pug">
+    Hello!
+</template>

test/fixtures/ast/pug/token-ranges.json

@@ -0,0 +1 @@
+[]

test/fixtures/ast/pug/tree.json

@@ -0,0 +1 @@
+[]