SystemQueryy: Add version & commit properties

src/lib/SystemQuery.mjs

@@ -1,15 +1,18 @@
 "use strict";
 
+import fs from 'fs';
+import path from 'path';
 import { once, EventEmitter } from 'events';
 
 import log from './io/NamespacedLog.mjs'; const l = log("systemquery");
+import ItemQueue from './async/ItemQueue.mjs';
+import current_git_commit from './io/current_git_commit.mjs';
 
 import Agent from './agent/Agent.mjs';
 import InfoBroker from './core/InfoBroker.mjs';
 import HttpSubsystem from './agent/subsystems/http/HttpSubsystem.mjs';
 
-import ItemQueue from './async/ItemQueue.mjs';
+const __dirname = import.meta.url.slice(7, import.meta.url.lastIndexOf("/"));
-
 
 class SystemQuery extends EventEmitter {
 	/**
@@ -43,6 +46,11 @@ class SystemQuery extends EventEmitter {
 		this.config = config;
 		this.info = new InfoBroker();
 		
+		this.pkg = null;
+		this.version = null;
+		this.commit = null;
+		
+		this.agent = null;
 		this.http = new HttpSubsystem(this);
 	}
 	
@@ -51,6 +59,13 @@ class SystemQuery extends EventEmitter {
 	 * @return	{Promise}	A Promise that resolves when initialisation is complete.
 	 */
 	async init() {
+		///
+		// 0: Preamble
+		///
+		this.pkg = JSON.parse(await fs.promises.readFile(path.join(__dirname, "../../package.json")));
+		this.version = this.pkg.version;
+		this.commit = await current_git_commit(path.join(__dirname, "../../.git"));
+		
 		///
 		// 1: Create agent
 		///

src/lib/io/current_git_commit.mjs

@@ -0,0 +1,13 @@
+"use strict";
+
+import fs from 'fs';
+import path from 'path';
+
+export default async function(git_dir) {
+	const gitId = await fs.promises.readFile(path.join(git_dir, "HEAD"), 'utf8');
+	if (gitId.indexOf(':') === -1)
+		return gitId;
+	
+	const refPath = path.join(git_dir, gitId.substring(5).trim());
+	return await fs.promises.readFile(refPath, 'utf8');
+}