Fix result.errored and make codes more readable

Author: chinesedfan

src/index.js

@@ -44,8 +44,10 @@ module.exports = options => ({
       .filter(
         warning =>
           // Filter indentation warnings generated by interpolations substitution
-          warning.rule !== 'indentation' ||
-          interpolationLines.indexOf(lineCorrection[warning.line]) < 0
+          !(
+            warning.rule === 'indentation' &&
+            interpolationLines.indexOf(lineCorrection[warning.line]) >= 0
+          )
       )
       .map(warning =>
         Object.assign({}, warning, {
@@ -56,10 +58,11 @@ module.exports = options => ({
         })
       )
 
-    return Object.assign({}, stylelintResult, {
-      warnings,
-      // Remember to fix
-      errored: warnings.length ? true : undefined
-    })
+    const result = Object.assign({}, stylelintResult, { warnings })
+    // Undo `errored` if no warnings with error severity any more
+    if (result.errored && !warnings.some(warning => warning.severity === 'error')) {
+      delete result.errored
+    }
+    return result
   }
 })

src/parsers/index.js

@@ -77,8 +77,10 @@ const processStyledComponentsFile = (ast, absolutePath, options) => {
         sourceMap,
         getSourceMap(extractedCSS.join('\n'), wrappedContent, processedNode.quasi.loc.start.line)
       )
-      // Save interpolation lines
+      // Save dummy interpolation lines
       node.quasi.expressions.forEach((expression, i) => {
+        // Skip the end line of previous text
+        // because the indentation is not generated by substitution
         let l = node.quasi.quasis[i].loc.end.line + 1
         while (l <= node.quasi.quasis[i + 1].loc.start.line) {
           interpolationLines.push(l)