map all render errors to the template

Author: yyx990803

lib/compiler.js

@@ -137,9 +137,16 @@ compiler.compile = function (content, filePath, cb) {
             'should be defined in plain js files using render functions.' +
           '")}\n'
       }
+      var beforeLines
+      if (map) {
+        beforeLines = output.split(splitRE).length
+      }
       output +=
         '__vue__options__.render = ' + template.render + '\n' +
         '__vue__options__.staticRenderFns = ' + template.staticRenderFns + '\n'
+      if (map) {
+        addTemplateMapping(content, parts, output, map, beforeLines)
+      }
     }
     // scoped CSS id
     if (hasScopedStyle) {
@@ -205,10 +212,29 @@ compiler.compile = function (content, filePath, cb) {
         })
       }
     })
+    map._hashedFilename = hashedFilename
     return map
   }
 }
 
+function addTemplateMapping (content, parts, output, map, beforeLines) {
+  var afterLines = output.split(splitRE).length
+  var templateLine = content.slice(0, parts.template.start).split(splitRE).length
+  for (; beforeLines < afterLines; beforeLines++) {
+    map.addMapping({
+      source: map._hashedFilename,
+      generated: {
+        line: beforeLines,
+        column: 0
+      },
+      original: {
+        line: templateLine,
+        column: 0
+      }
+    })
+  }
+}
+
 function processTemplate (part, filePath, parts) {
   if (!part) return Promise.resolve()
   var template = getContent(part, filePath)