I#1850 - Flatpak: Attachments cannot be opened

Closes https://gitlab.gnome.org/GNOME/evolution/-/issues/1850

flatpak/org.gnome.Evolution-master.json

@@ -369,6 +369,9 @@
 		{
 			"name": "evolution",
 			"buildsystem": "cmake-ninja",
+			"build-options" : {
+				"cflags": "-DTEMP_HOME=1"
+			},
 			"config-opts": [
 				"-DENABLE_AUTOAR=OFF",
 				"-DENABLE_CONTACT_MAPS=OFF",

flatpak/org.gnome.Evolution-stable.json

@@ -368,6 +368,9 @@
 		{
 			"name": "evolution",
 			"buildsystem": "cmake-ninja",
+			"build-options" : {
+				"cflags": "-DTEMP_HOME=1"
+			},
 			"config-opts": [
 				"-DENABLE_AUTOAR=OFF",
 				"-DENABLE_CONTACT_MAPS=OFF",

src/e-util/e-mktemp.c

@@ -38,7 +38,9 @@
 
 #define d(x)
 
-/* define to put temporary files in ~/evolution/cache/tmp */
+/* define to put temporary files in ~/.cache/evolution/tmp/ */
+/* Keep this for Flatpak builds, until glib allows access to in-sandbox /tmp
+   See https://gitlab.gnome.org/GNOME/glib/-/issues/2235 for more information */
 /* #define TEMP_HOME */
 
 /* how old things need to be to expire */

src/mail/e-mail-display.c

@@ -787,7 +787,7 @@ mail_display_open_attachment (EMailDisplay *display,
 			attachment, default_app, (GAsyncReadyCallback)
 			e_attachment_open_handle_error, parent);
 
-		g_object_unref (default_app);
+		g_clear_object (&default_app);
 	} else {
 		/* ...or save it */
 		GList *attachments;