From fb6eec74d2f1bf050d068e0894cce89a31fc9a78 Mon Sep 17 00:00:00 2001
From: papush
Date: Sun, 29 Aug 2021 14:54:20 +0200
Subject: figure out the add-on version programatically in handleUpgrades

---
 chrome/js/redirector.js | 73 ++++++++++++++++++++++++++-----------------------
 1 file changed, 39 insertions(+), 34 deletions(-)

diff --git a/chrome/js/redirector.js b/chrome/js/redirector.js
index fa48d68..b62c3da 100644
--- a/chrome/js/redirector.js
+++ b/chrome/js/redirector.js
@@ -2,6 +2,7 @@ Components.utils.import("chrome://redirector/content/js/xpcom.js");
 Components.utils.import("chrome://redirector/content/js/redirect.js");
 Components.utils.import("chrome://redirector/content/js/redirectorprefs.js");
 Components.utils.import("resource://gre/modules/Services.jsm");
+Components.utils.import('resource://gre/modules/AddonManager.jsm');
 
 var EXPORTED_SYMBOLS = ['Redirector'];
 
@@ -104,43 +105,47 @@ Redirector = {
 		return file;
 	},
 
-	handleUpgrades : function(){
-		var currentVersion = '2.8.3';
-		this._list = [];
-
-		if (this._prefs.version == currentVersion) {
-			return;
-		}
-		//Here update checks are handled
+	handleUpgrades : function() {
+		AddonManager.getAddonByID("url-rewriter@papush", (addon) => {
+			currentVersion = '' + addon.version;
+			this._list = [];
 
-		try {
-			var branch = PrefService.getBranch("extensions.redirector.");
-			var data = branch.getCharPref("redirects");
-		} catch(e) {
-			this._prefs.version = currentVersion;
-			return;
-		}
-		var arr;
-		this._list = [];
-		if (data != '') {
-			for each (redirectString in data.split(':::')) {
-				if (!redirectString || !redirectString.split) {
-					continue;
-					this.debug('Invalid old redirect: ' + redirectString);
-				}
-				var parts = redirectString.split(',,,');
-				if (parts.length < 5) {
-					throw Error("Invalid serialized redirect, too few fields: " + redirectString);
+			if (this._prefs.version == currentVersion) {
+				this.debug("No version change, prefs migration skipped");
+				return;
+			}
+			this.debug("Migrating prefs");
+			//Here update checks are handled
+
+			try {
+				var branch = PrefService.getBranch("extensions.redirector.");
+				var data = branch.getCharPref("redirects");
+			} catch(e) {
+				this._prefs.version = currentVersion;
+				return;
+			}
+			var arr;
+			this._list = [];
+			if (data != '') {
+				for each (redirectString in data.split(':::')) {
+					if (!redirectString || !redirectString.split) {
+						continue;
+						this.debug('Invalid old redirect: ' + redirectString);
+					}
+					var parts = redirectString.split(',,,');
+					if (parts.length < 5) {
+						throw Error("Invalid serialized redirect, too few fields: " + redirectString);
+					}
+					var redirect = new Redirect();
+					redirect._init.apply(redirect, parts);
+					this._list.push(redirect);
 				}
-				var redirect = new Redirect();
-				redirect._init.apply(redirect, parts);
-				this._list.push(redirect);
+				this.save();
+				this._list = []; //Let the real loading start this properly
 			}
-			this.save();
-			this._list = []; //Let the real loading start this properly
-		}
-		branch.deleteBranch('redirects');
-		this._prefs.version = currentVersion;
+			branch.deleteBranch('redirects');
+			this._prefs.version = currentVersion;
+		});
 	},
 
 	importRedirects : function(file) {
-- 
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