fix(sfc): avoid deindent when pad option is specified (#7647)

src/sfc/parser.js

@@ -83,11 +83,15 @@ export function parseComponent (
   function end (tag: string, start: number) {
     if (depth === 1 && currentBlock) {
       currentBlock.end = start
-      let text = deindent(content.slice(currentBlock.start, currentBlock.end))
+      let text = content.slice(currentBlock.start, currentBlock.end)
       // pad content so that linters and pre-processors can output correct
       // line numbers in errors and warnings
-      if (currentBlock.type !== 'template' && options.pad) {
+      if (options.pad) {
         text = padContent(currentBlock, options.pad) + text
+      } else {
+        // avoid to deindent if pad option is specified
+        // to retain original source position.
+        text = deindent(text)
       }
       currentBlock.content = text
       currentBlock = null

test/unit/modules/sfc/sfc-parser.spec.js

@@ -71,21 +71,42 @@ describe('Single File Component parser', () => {
     const padLine = parseComponent(content.trim(), { pad: 'line' })
     const padSpace = parseComponent(content.trim(), { pad: 'space' })
 
-    expect(padDefault.script.content).toBe(Array(3 + 1).join('//\n') + '\nexport default {}\n')
-    expect(padDefault.styles[0].content).toBe(Array(6 + 1).join('\n') + '\nh1 { color: red }\n')
-    expect(padLine.script.content).toBe(Array(3 + 1).join('//\n') + '\nexport default {}\n')
-    expect(padLine.styles[0].content).toBe(Array(6 + 1).join('\n') + '\nh1 { color: red }\n')
+    expect(padDefault.template.content).toBe(Array(1).join('\n') + `
+        <div></div>
+      `)
+    expect(padDefault.script.content).toBe(Array(3 + 1).join('//\n') + `
+        export default {}
+      `)
+    expect(padDefault.styles[0].content).toBe(Array(6 + 1).join('\n') + `
+        h1 { color: red }
+      `)
+    expect(padLine.template.content).toBe(Array(1).join('\n') + `
+        <div></div>
+      `)
+    expect(padLine.script.content).toBe(Array(3 + 1).join('//\n') + `
+        export default {}
+      `)
+    expect(padLine.styles[0].content).toBe(Array(6 + 1).join('\n') + `
+        h1 { color: red }
+      `)
+    expect(padSpace.template.content).toBe(`<template>`.replace(/./g, ' ') + `
+        <div></div>
+      `)
     expect(padSpace.script.content).toBe(`<template>
         <div></div>
       </template>
-      <script>`.replace(/./g, ' ') + '\nexport default {}\n')
+      <script>`.replace(/./g, ' ') + `
+        export default {}
+      `)
     expect(padSpace.styles[0].content).toBe(`<template>
         <div></div>
       </template>
       <script>
         export default {}
       </script>
-      <style>`.replace(/./g, ' ') + '\nh1 { color: red }\n')
+      <style>`.replace(/./g, ' ') + `
+        h1 { color: red }
+      `)
   })
 
   it('should handle template blocks with lang as special text', () => {