luci-app-opkg: add warning about upgrading packages

It is a well-known fact that opkg doesn't check ABI-compatibility between dependencies and upgrading packages in a stable release is therefore not recommended. This commit adds a warning which should help especially new users find more information on why this is and avoiding soft-bricking their device.

Signed-off-by: Daniel Nilsson <daniel.nilsson94@outlook.com>

applications/luci-app-opkg/htdocs/luci-static/resources/view/opkg.js

@@ -204,8 +204,15 @@ function display(pattern)
 	var src = packages[currentDisplayMode === 'updates' ? 'installed' : currentDisplayMode],
 	    table = document.querySelector('#packages'),
 	    pagers = document.querySelectorAll('.controls > .pager'),
+	    updates_warning = document.querySelector('#updates-warning'),
 	    i18n_filter = null;
 
+	if (currentDisplayMode !== 'updates') {
+		updates_warning.style.display = 'none';
+	} else {
+		updates_warning.style.display = '';
+	}
+
 	currentDisplayRows.length = 0;
 
 	if (typeof(pattern) === 'string' && pattern.length > 0)
@@ -1212,6 +1219,13 @@ return view.extend({
 				E('li', { 'data-mode': 'updates', 'class': 'installed cbi-tab-disabled', 'click': handleMode }, E('a', { 'href': '#' }, [ _('Updates') ]))
 			]),
 
+			E('div', { 'id': 'updates-warning', 'class': 'alert-message warning', 'style': 'display:none' }, [
+				E('p', _('Warning! Upgrading packages may cause serious problems, including soft-bricking your device!')),
+				E('p', _('See <a %s">explanation on wiki</a> why caution is advised.').format(
+					'href="https://openwrt.org/meta/infobox/upgrade_packages_warning" target="_blank" rel="noreferrer"'
+				))
+			]),
+
 			E('div', { 'class': 'controls', 'style': 'display:none' }, [
 				E('div', { 'class': 'pager center' }, [
 					E('button', { 'class': 'btn cbi-button-neutral prev', 'aria-label': _('Previous page'), 'click': handlePage }, [ '«' ]),