toaster: reserve HEAD from imported layers

The HEAD reference in Toaster layers are reserved for the
"Local Yocto Project" layers, stored at the top directory.
Imported layers are not allowed to use this since they are
managed differently - for example the 'remotes' will collide.

Fix the add layer handler to not drop the data fields when it
is a git repo.

Explicitly inform the user when an internal Toaster error is
returned via AJAX, so that they know why clicking the layer add
button did not do anything.

[YOCTO #9924]

Signed-off-by: David Reyna <David.Reyna@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

3 files changed, 18 insertions, 7 deletions

diff --git a/lib/toaster/toastergui/api.py b/lib/toaster/toastergui/api.py
index 5b035505c..1a6507c3f 100644
--- a/lib/toaster/toastergui/api.py
+++ b/lib/toaster/toastergui/api.py
@@ -292,14 +292,14 @@ class XhrLayer(View):
                 layer_source=LayerSource.TYPE_IMPORTED)
 
             # Local layer
-            if 'local_source_dir' in layer_data:
+            if ('local_source_dir' in layer_data) and layer.local_source_dir:
                 layer.local_source_dir = layer_data['local_source_dir']
             # git layer
             elif 'vcs_url' in layer_data:
                 layer.vcs_url = layer_data['vcs_url']
                 layer_version.dirpath = layer_data['dir_path']
-                layer_version.commit = layer_data['get_ref']
-                layer_version.branch = layer_data['get_ref']
+                layer_version.commit = layer_data['git_ref']
+                layer_version.branch = layer_data['git_ref']
 
             layer.save()
             layer_version.save()
diff --git a/lib/toaster/toastergui/static/js/importlayer.js b/lib/toaster/toastergui/static/js/importlayer.js
index b3f094e69..59652b9a3 100644
--- a/lib/toaster/toastergui/static/js/importlayer.js
+++ b/lib/toaster/toastergui/static/js/importlayer.js
@@ -176,6 +176,8 @@ function importLayerPageInit (ctx) {
           success: function (data) {
             if (data.error != "ok") {
               console.log(data.error);
+              /* let the user know why nothing happened */
+              alert(data.error)
             } else {
               createImportedNotification(data);
               window.location.replace(libtoaster.ctx.projectPageUrl);
@@ -244,9 +246,18 @@ function importLayerPageInit (ctx) {
         enable_import_btn(true);
       }
 
-      if ($("#git-repo-radio").prop("checked") &&
-          vcsURLInput.val().length > 0 && gitRefInput.val().length > 0) {
-        enable_import_btn(true);
+      if ($("#git-repo-radio").prop("checked")) {
+        if (gitRefInput.val().length > 0 &&
+            gitRefInput.val() == 'HEAD') {
+          $('#invalid-layer-revision-hint').show();
+          $('#layer-revision-ctrl').addClass('has-error');
+          enable_import_btn(false);
+        } else if (vcsURLInput.val().length > 0 &&
+                   gitRefInput.val().length > 0) {
+          $('#invalid-layer-revision-hint').hide();
+          $('#layer-revision-ctrl').removeClass('has-error');
+          enable_import_btn(true);
+        }
       }
     }
 
diff --git a/lib/toaster/toastergui/templates/importlayer.html b/lib/toaster/toastergui/templates/importlayer.html
index afbeb94d4..7e5253e96 100644
--- a/lib/toaster/toastergui/templates/importlayer.html
+++ b/lib/toaster/toastergui/templates/importlayer.html
@@ -115,8 +115,8 @@
         </label>
         <span style="display: block">
         <input type="text" class="form-control" id="layer-git-ref" autocomplete="off" data-minLength="1" data-autocomplete="off" data-provide="typeahead" required>
-        <span class="help-inline" style="display:none;" id="invalid-layer-revision-hint"></span>
         </span>
+        <span class="help-block has-error" style="display:none;" id="invalid-layer-revision-hint">The "HEAD" branch is reserved (only allowed for the "Local Yocto Project" layers)</span>
       </div>
     </fieldset>