1 files changed, 53 insertions, 0 deletions
diff --git a/src/modules/version.js b/src/modules/version.js
new file mode 100644
index 0000000..033fbf0
--- /dev/null
+++ b/src/modules/version.js
@@ -0,0 +1,53 @@
+const path = require('path');
+const fs = require('fs');
+const {promisify} = require('util');
+const utils = require("../utils");
+const updates = require('../data/updates');
+const config = require('../config');
+
+const access = promisify(fs.access);
+const readFile = promisify(fs.readFile);
+
+const GIT_DIR = path.join(__dirname, '..', '..', '.git');
+
+module.exports = ({ bot, knex, config, commands }) => {
+  commands.addInboxServerCommand('version', [], async (msg, args, thread) => {
+    const packageJson = require('../../package.json');
+    const packageVersion = packageJson.version;
+
+    let response = `Modmail v${packageVersion}`;
+
+    let isGit;
+    try {
+      await access(GIT_DIR);
+      isGit = true;
+    } catch (e) {
+      isGit = false;
+    }
+
+    if (isGit) {
+      let commitHash;
+      const HEAD = await readFile(path.join(GIT_DIR, 'HEAD'), {encoding: 'utf8'});
+
+      if (HEAD.startsWith('ref:')) {
+        // Branch
+        const ref = HEAD.match(/^ref: (.*)$/m)[1];
+        commitHash = (await readFile(path.join(GIT_DIR, ref), {encoding: 'utf8'})).trim();
+      } else {
+        // Detached head
+        commitHash = HEAD.trim();
+      }
+
+      response += ` (${commitHash.slice(0, 7)})`;
+    }
+
+    if (config.updateNotifications) {
+      const availableUpdate = await updates.getAvailableUpdate();
+      if (availableUpdate) {
+        response += ` (version ${availableUpdate} available)`;
+      }
+    }
+
+    utils.postSystemMessageWithFallback(msg.channel, thread, response);
+  });
+};