1 files changed, 40 insertions, 28 deletions

diff --git a/lib/detectLocalGit.js b/lib/detectLocalGit.js
index 46a9e67..89133ff 100644
--- a/lib/detectLocalGit.js
+++ b/lib/detectLocalGit.js
@@ -1,47 +1,59 @@
-var fs = require('fs');
-var path = require('path');
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
 
 // branch naming only has a few excluded characters, see git-check-ref-format(1)
-var REGEX_BRANCH = /^ref: refs\/heads\/([^?*\[\\~^:]+)$/;
+const REGEX_BRANCH = /^ref: refs\/heads\/([^?*[\\~^:]+)$/;
+
+function detectLocalGit() {
+  let dir = process.cwd();
+  let gitDir;
 
-module.exports = function detectLocalGit() {
-  var dir = process.cwd(), gitDir;
   while (path.resolve('/') !== dir) {
     gitDir = path.join(dir, '.git');
-    var existsSync = fs.existsSync || path.existsSync;
-    if (existsSync(path.join(gitDir, 'HEAD')))
+    const existsSync = fs.existsSync || path.existsSync;
+    if (existsSync(path.join(gitDir, 'HEAD'))) {
       break;
+    }
 
     dir = path.dirname(dir);
   }
 
-  if (path.resolve('/') === dir)
+  if (path.resolve('/') === dir) {
     return;
+  }
 
-  var head = fs.readFileSync(path.join(dir, '.git', 'HEAD'), 'utf-8').trim();
-  var branch = (head.match(REGEX_BRANCH) || [])[1];
-  if (!branch)
+  const head = fs.readFileSync(path.join(dir, '.git', 'HEAD'), 'utf-8').trim();
+  const branch = (head.match(REGEX_BRANCH) || [])[1];
+  if (!branch) {
     return { git_commit: head };
+  }
 
-  var commit = _parseCommitHashFromRef(dir, branch);
+  const commit = _parseCommitHashFromRef(dir, branch);
 
-  return { git_commit: commit, git_branch: branch };
-};
+  return {
+    git_commit: commit,
+    git_branch: branch
+  };
+}
 
 function _parseCommitHashFromRef(dir, branch) {
-    var ref = path.join(dir, '.git', 'refs', 'heads', branch);
-    if (fs.existsSync(ref)) {
-        return fs.readFileSync(ref, 'utf-8').trim();
-    } else {
-        // ref does not exist; get it from packed-refs
-        var commit = '';
-        var packedRefs = path.join(dir, '.git', 'packed-refs');
-        var packedRefsText = fs.readFileSync(packedRefs, 'utf-8');
-        packedRefsText.split('\n').forEach(function (line) {
-            if (line.match('refs/heads/'+branch)) {
-                commit = line.split(' ')[0];
-            }
-        });
-        return commit;
+  const ref = path.join(dir, '.git', 'refs', 'heads', branch);
+  if (fs.existsSync(ref)) {
+    return fs.readFileSync(ref, 'utf-8').trim();
+  }
+
+  // ref does not exist; get it from packed-refs
+  let commit = '';
+  const packedRefs = path.join(dir, '.git', 'packed-refs');
+  const packedRefsText = fs.readFileSync(packedRefs, 'utf-8');
+  packedRefsText.split('\n').forEach(line => {
+    if (line.match(`refs/heads/${branch}`)) {
+      commit = line.split(' ')[0];
     }
+  });
+  return commit;
 }
+
+module.exports = detectLocalGit;