Use git to order welcome tweets

scripts/print_welcome_tweets.js

@@ -1,5 +1,7 @@
 #!/usr/bin/env node
 require("@js-joda/timezone");
+const util = require("util");
+const exec = util.promisify(require("child_process").exec);
 const glob = require("glob").sync;
 const { resolve, basename, dirname } = require("path");
 const { readFileSync, statSync } = require("fs");
@@ -28,27 +30,43 @@ const dateFormat = DateTimeFormatter.ofPattern(
   "eeee 'at' HH:mm ('UTC'x)"
 ).withLocale(Locale.US);
 
-glob(__dirname + "/../_data/**/.SCHEMA.json")
-  .sort()
-  .forEach((schemaFile) => {
+const gitCreationDate = async (file) => {
+  const output = await exec(`git log --format=%at "${file}" | tail -1`);
+  if (!!output.stderr) throw output.stderr;
+  return Number(output.stdout.trim());
+};
+
+const run = async () => {
+  const schemas = glob(__dirname + "/../_data/**/.SCHEMA.json");
+  for (let schemaFile of schemas) {
     console.log(
       "EVENTS FOR",
       dirname(schemaFile),
       "\n--------------------------------"
     );
-    const events = glob(dirname(schemaFile) + "/*.json").sort(
-      (file_1, file_2) => statSync(file_1).mtimeMs - statSync(file_2).mtimeMs
-    );
+    const events = (
+      await Promise.all(
+        glob(dirname(schemaFile) + "/*.json").map(async (event) => {
+          const creationTime = await gitCreationDate(event);
+          return { event, creationTime };
+        })
+      )
+    )
+      .sort((eventA, eventB) => eventA.creationTime - eventB.creationTime)
+      .map((e) => e.event);
 
     for (let eventFile of events) {
       const event = JSON.parse(readFileSync(eventFile).toString());
 
       const date = ZonedDateTime.parse(event.date.start);
-      if(date.isBefore(ZonedDateTime.now())) continue;
+      if (date.isBefore(ZonedDateTime.now())) continue;
       const tweet = `🌐 Welcome ${event.title}${toWelcomeTweetModerators(
         event.moderators
       )} on ${dateFormat.format(date)} to #gdcr21! ${event.url}`;
       console.log(tweet);
     }
     console.log("");
-  });
+  }
+};
+
+run();