Merge pull request #10 from kellyselden/whitespace_fix

fix the whitespace indent problem

Author: psbanka

.gitignore

@@ -0,0 +1 @@
+/node_modules/

lib/rules/check-hbs-template-literals.js

@@ -67,7 +67,8 @@ module.exports = {
       TaggedTemplateExpression: (node) => {
         if (node.tag.name === 'hbs') {
           if (node.quasi.type === 'TemplateLiteral') {
-            const hbs = node.quasi.quasis[0].value.cooked
+            let hbs = node.quasi.quasis[0].value.cooked
+            hbs = unindentAndStripSafeNewlines(hbs)
             const results = linter.verify({source: hbs.toString(), moduleId: context.id})
             if (results.length !== 0) {
               const firstLine = results[0].message.split('\n')[0]
@@ -80,3 +81,63 @@ module.exports = {
     }
   }
 }
+
+/*
+This turns:
+
+```js
+`
+    {{#foo-bar}}
+      template block text
+    {{/foo-bar}}
+  `
+```js
+
+into:
+
+```js
+`{{#foo-bar}}
+  template block text
+{{/foo-bar}}`
+```js
+
+so your indentation, whitespace, and newline rules don't fail on every template.
+*/
+function unindentAndStripSafeNewlines(template) {
+  let lines = template.split('\n')
+
+  // you are allowed one initial blank line, we remove it for you
+  if (lines[0] === '') {
+    lines = lines.slice(1)
+  }
+
+  let countSame = -1
+  let testChar
+  do {
+    countSame++
+    testChar = null
+    for (let line of lines) {
+      if (!testChar) {
+        testChar = line[countSame]
+      }
+      let curChar = line[countSame]
+      let isBlankLine = !curChar
+      let isWhitespace = curChar === ' ' || curChar === '\t'
+      if (!isBlankLine && (!isWhitespace || curChar !== testChar)) {
+        testChar = null
+        break
+      }
+    }
+  } while (testChar)
+  
+  lines = lines.map(line => {
+    return line.substr(countSame)
+  })
+
+  // after we are done un-indenting, we will remove one final blank line for you
+  if (lines[lines.length - 1] === '') {
+    lines = lines.slice(0, lines.length - 1)
+  }
+
+  return lines.join('\n')
+}