Display error when remote repositories can't be fetched

gitlab.go

@@ -27,7 +27,7 @@ const (
 var (
 	gitlabClientID     = ""
 	gitlabSecret       = ""
-	gitlaboauth2Config oauth2.Config
+	gitlaboauth2Config *oauth2.Config
 	gitlabToken        func() *oauth2.Token
 )
 
@@ -41,7 +41,7 @@ func initializeGitLabOIDC(router *gin.Engine, authrouter *gin.RouterGroup, admin
 	router.GET("/callback/gitlabcri/complete", GitLab_OAuth_complete)
 
 	if gitlabClientID != "" && gitlabSecret != "" {
-		gitlaboauth2Config = oauth2.Config{
+		gitlaboauth2Config = &oauth2.Config{
 			ClientID:     gitlabClientID,
 			ClientSecret: gitlabSecret,
 			RedirectURL:  oidcRedirectURL + baseURL + "/callback/gitlabcri/complete",
@@ -243,6 +243,10 @@ func GitLab_GetMyRepositories(c *gin.Context) {
 }*/
 
 func GitLab_getUsersRepositories(c context.Context, u *User) ([]*GitLabRepository, error) {
+	if gitlaboauth2Config == nil || gitlabToken == nil {
+		return nil, fmt.Errorf("the connection with GitLab is not setup yet")
+	}
+
 	client := gitlaboauth2Config.Client(c, gitlabToken())
 
 	req, err := http.NewRequest("GET", gitlabBaseURL+fmt.Sprintf("/api/v4/users/%s/projects?per_page=100", u.Login), nil)

ui/src/components/WorkRepository.svelte

@@ -165,14 +165,18 @@
                     {/each}
                 </select>
                 <label>Dépôt GitLab pour ce travail&nbsp;:</label>
+                <button
+                    type="submit"
+                    class="mt-2 btn btn-primary"
+                    disable={submitInProgress || readonly || !repo_used || !repo_used.uri}
+                >
+                    Utiliser ce dépôt
+                </button>
+            {:catch err}
+                <div class="text-danger">
+                    {err.message} Veuillez réessyer dans quelques instants&hellip;<br>Si le problème persiste, contactez votre professeur.
+                </div>
             {/await}
-            <button
-                type="submit"
-                class="mt-2 btn btn-primary"
-                disable={submitInProgress || readonly || !repo_used || !repo_used.uri}
-            >
-                Utiliser ce dépôt
-            </button>
             <button
                 type="button"
                 class="mt-2 btn btn-info"