[PATCH 2/4] docs: sphinx-static: switchers.js: correctly highlight obsolete releases

[Quentin Schulz <quentin.schulz@theobroma-systems.com>]

Currently, only releases before 3.1 are marked as obsolete even though
3.2 is already obsolete too.

Since 3.1 is an LTS and is still maintained, it needs to not be marked
as obsolete, unlike 3.2. Therefore, LTS series are now also tested
against before marking a release as obsolete.

This makes non-LTS, non-latest releases obsolete.

Cc: Quentin Schulz <foss@0leil.net>
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
---
 documentation/sphinx-static/switchers.js | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/documentation/sphinx-static/switchers.js b/documentation/sphinx-static/switchers.js
index cb55e35c8..6038ae065 100644
--- a/documentation/sphinx-static/switchers.js
+++ b/documentation/sphinx-static/switchers.js
@@ -10,11 +10,22 @@
     '2.7.4': 'warrior (2.7.4)',
   };
 
+  var latest_release_series = '3.3'
+  var lts_series = [
+	'3.1',
+  ]
+
   var all_doctypes = {
       'single': 'Individual Webpages',
       'mega': "All-in-one 'Mega' Manual",
   };
 
+  function ver_obsolete(curr) {
+    var series = curr.substr(0, 3);
+    return ver_compare(curr, latest_release_series) < 0 &&
+	    lts_series.indexOf(series) >= 0;
+  }
+
   // Simple version comparision
   // Return 1 if a > b
   // Return -1 if a < b
@@ -219,7 +230,7 @@
     $('.doctype_switcher_placeholder').html(doctype_select);
     $('.doctype_switcher_placeholder select').bind('change', on_doctype_switch);
 
-    if (ver_compare(release, "3.1") < 0) {
+    if (ver_obsolete(release) != 0) {
       $('#outdated-warning').html('Version ' + release + ' of the project is now considered obsolete, please select and use a more recent version');
       $('#outdated-warning').css('padding', '.5em');
     } else if (release != "dev") {
-- 
2.31.1