From da431580d4b1cb7d3c40808e5d029b2784f68e61 Mon Sep 17 00:00:00 2001
From: Martchus <martchus@gmx.net>
Date: Tue, 11 Oct 2022 20:05:02 +0200
Subject: [PATCH] Prevent AppStream validation error
 `asv-cid-desktopapp-is-not-rdns`

See https://github.com/Martchus/syncthingtray/issues/158
---
 cmake/modules/BasicConfig.cmake | 13 +++++++++++++
 cmake/templates/appdata.xml.in  |  2 +-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/cmake/modules/BasicConfig.cmake b/cmake/modules/BasicConfig.cmake
index 5de5f29..e91ef52 100644
--- a/cmake/modules/BasicConfig.cmake
+++ b/cmake/modules/BasicConfig.cmake
@@ -174,6 +174,19 @@ if (NOT META_PROJECT_LICENSE)
     endif ()
 endif ()
 
+# determine RDNS automatically from other meta-data
+if (NOT META_PROJECT_RDNS)
+    if (NOT META_PROJECT_RDNS_BASE)
+        if (META_APP_URL MATCHES ".*github\\.com.*")
+            set(META_PROJECT_RDNS_BASE "io.github") # assume GitHub pages
+        else ()
+            set(META_PROJECT_RDNS_BASE "org")
+        endif ()
+    endif ()
+    string(TOLOWER "${META_APP_AUTHOR}" META_APP_AUTHOR_LOWER)
+    set(META_PROJECT_RDNS "${META_PROJECT_RDNS_BASE}.${META_APP_AUTHOR_LOWER}.${META_PROJECT_NAME}${TARGET_SUFFIX}")
+endif ()
+
 # provide variables for other projects built as part of the same subdirs project to access files from this project
 get_directory_property(HAS_PARENT PARENT_DIRECTORY)
 if (HAS_PARENT)
diff --git a/cmake/templates/appdata.xml.in b/cmake/templates/appdata.xml.in
index 35772fa..91f8eaa 100644
--- a/cmake/templates/appdata.xml.in
+++ b/cmake/templates/appdata.xml.in
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <component type="desktop-application">
-  <id>@META_ID@</id>
+  <id>@META_PROJECT_RDNS@</id>
   <metadata_license>MIT</metadata_license>
   <project_license>@META_PROJECT_LICENSE@</project_license>
   <name>@META_APP_NAME@</name>