Fix base_url in error pages. (mkdocs#1599)

Closes mkdocs#1598.

mkdocs/commands/build.py

@@ -52,7 +52,7 @@ def get_context(nav, files, config, page=None, base_url=''):
         'nav': nav,
         'pages': files.documentation_pages(),
 
-        'base_url': base_url.rstrip('/'),
+        'base_url': base_url,
 
         'extra_css': extra_css,
         'extra_javascript': extra_javascript,
@@ -78,8 +78,10 @@ def _build_template(name, template, files, config, nav):
     if utils.is_error_template(name):
         # Force absolute URLs in the nav of error pages and account for the
         # possability that the docs root might be different than the server root.
-        # See https://github.com/mkdocs/mkdocs/issues/77
-        base_url = utils.urlparse(config['site_url']).path
+        # See https://github.com/mkdocs/mkdocs/issues/77.
+        # However, if site_url is not set, assume the docs root and server root
+        # are the same. See https://github.com/mkdocs/mkdocs/issues/1598.
+        base_url = utils.urlparse(config['site_url'] or '/').path
     else:
         base_url = utils.get_relative_url('.', name)
 

mkdocs/contrib/search/templates/search/main.js

@@ -9,8 +9,20 @@ function getSearchTermFromLocation() {
   }
 }
 
+function joinUrl (base, path) {
+  if (path.substring(0, 1) === "/") {
+    // path starts with `/`. Thus it is absolute.
+    return path;
+  }
+  if (base.substring(base.length-1) === "/") {
+    // base ends with `/`
+    return base + path;
+  }
+  return base + "/" + path;
+}
+
 function formatResult (location, title, summary) {
-  return '<article><h3><a href="' + base_url + '/' + location + '">'+ title + '</a></h3><p>' + summary +'</p></article>';
+  return '<article><h3><a href="' + joinUrl(base_url, location) + '">'+ title + '</a></h3><p>' + summary +'</p></article>';
 }
 
 function displayResults (results) {
@@ -67,7 +79,7 @@ function onWorkerMessage (e) {
 if (!window.Worker) {
   console.log('Web Worker API not supported');
   // load index in main thread
-  $.getScript(base_url + "/search/worker.js").done(function () {
+  $.getScript(joinUrl(base_url, "search/worker.js")).done(function () {
     console.log('Loaded worker');
     init();
     window.postMessage = function (msg) {
@@ -78,7 +90,7 @@ if (!window.Worker) {
   });
 } else {
   // Wrap search in a web worker
-  var searchWorker = new Worker(base_url + "/search/worker.js");
+  var searchWorker = new Worker(joinUrl(base_url, "search/worker.js"));
   searchWorker.postMessage({init: true});
   searchWorker.onmessage = onWorkerMessage;
 }

mkdocs/tests/build_tests.py

@@ -91,22 +91,22 @@ def test_context_base_url_relative_no_page_use_directory_urls(self):
     def test_context_base_url_absolute_no_page(self):
         cfg = load_config(use_directory_urls=False)
         context = build.get_context(mock.Mock(), mock.Mock(), cfg, base_url='/')
-        self.assertEqual(context['base_url'], '')
+        self.assertEqual(context['base_url'], '/')
 
     def test_context_base_url__absolute_no_page_use_directory_urls(self):
         cfg = load_config()
         context = build.get_context(mock.Mock(), mock.Mock(), cfg, base_url='/')
-        self.assertEqual(context['base_url'], '')
+        self.assertEqual(context['base_url'], '/')
 
     def test_context_base_url_absolute_nested_no_page(self):
         cfg = load_config(use_directory_urls=False)
         context = build.get_context(mock.Mock(), mock.Mock(), cfg, base_url='/foo/')
-        self.assertEqual(context['base_url'], '/foo')
+        self.assertEqual(context['base_url'], '/foo/')
 
     def test_context_base_url__absolute_nested_no_page_use_directory_urls(self):
         cfg = load_config()
         context = build.get_context(mock.Mock(), mock.Mock(), cfg, base_url='/foo/')
-        self.assertEqual(context['base_url'], '/foo')
+        self.assertEqual(context['base_url'], '/foo/')
 
     def test_context_extra_css_js_from_homepage(self):
         nav_cfg = [