make build handle not yet added lessons

Author: greggman

build/js/build.js

@@ -390,14 +390,19 @@ var Builder = function(outBaseDir, options) {
  data);
  });
 
- function utcMomentFromGitLog(result) {
+ function utcMomentFromGitLog(result, filename, timeType) {
  const dateStr = result.stdout.split("\n")[0].trim();
  let utcDateStr = dateStr
  .replace(/"/g, "") // WTF to these quotes come from!??!
  .replace(" ", "T")
  .replace(" ", "")
  .replace(/(\d\d)$/, ':$1');
- return moment.utc(utcDateStr);
+ const m = moment.utc(utcDateStr);
+ if (m.isValid()) {
+ return m;
+ }
+ const stat = fs.statSync(filename);
+ return moment(stat[timeType]);
  }
 
  const tasks = g_articles.map((article) => {
@@ -409,7 +414,7 @@ var Builder = function(outBaseDir, options) {
  '--diff-filter=A',
  article.src_file_name,
  ]).then((result) => {
- article.dateAdded = utcMomentFromGitLog(result);
+ article.dateAdded = utcMomentFromGitLog(result, article.src_file_name, 'ctime');
  });
  };
  }).concat(g_articles.map((article) => {
@@ -421,7 +426,7 @@ var Builder = function(outBaseDir, options) {
  '--max-count=1',
  article.src_file_name,
  ]).then((result) => {
- article.dateModified = utcMomentFromGitLog(result);
+ article.dateModified = utcMomentFromGitLog(result, article.src_file_name, 'mtime');
  });
  };
  }));