Fix last updated time misleading, only show when file content change

or otherwise when it is first created

Fix #1015

v1/lib/core/utils.js

@@ -39,9 +39,26 @@ function idx(target, keyPaths) {
 }
 
 function getGitLastUpdated(filepath) {
- const timeSpan = spawn
- .sync('git', ['log', '-1', '--format=%ct', filepath])
- .stdout.toString('utf-8');
+ // To differentiate between content change and file renaming / moving, use --summary
+ // To follow the file history until before it is moved (when we create new version), use
+ // --follow
+ let result = spawn
+ .sync('git', ['log', '--follow', '--summary', '--format=%ct', filepath]);
+
+ // Format the log results to be ['1234567', 'rename ...', '1234566', 'move ...', '1234565', '1234564']
+ const records = result.stdout.toString('utf-8')
+ .replace(/\n\s*\n/g, '\n')
+ .split('\n')
+ .filter(String);
+
+ let timeSpan = records.find((item, index, arr) => {
+ // The correct timeSpan will be a number which is not followed by summary meaning
+ // the next element is also a number OR it is the last 2 element (since the
+ // last element will always be the summary -- 'create mode ... ')
+ return (!isNaN(item) && (
+ index + 2 === arr.length ||
+ !isNaN(arr[index+1])))
+ });
  if (timeSpan) {
  const date = new Date(parseInt(timeSpan, 10) * 1000);
  return date.toLocaleString();