Move java/incrementing-version-code to AndroidManifest.xml.in

* admin/admin.el (admin-android-version-code-regexp): New
variable.
(set-version): Modify AndroidManifest.xml.in instead.

* java/AndroidManifest.xml.in (Version-code): Define version
code.

* java/incrementing-version-code: Delete file.

1 files changed, 15 insertions, 0 deletions

diff --git a/java/AndroidManifest.xml.in b/java/AndroidManifest.xml.in
index 6243c5e13ba..92b63925ef4 100644
--- a/java/AndroidManifest.xml.in
+++ b/java/AndroidManifest.xml.in
@@ -338,3 +338,18 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>. -->
              android:label="GNU Emacs service"/>
   </application>
 </manifest>
+
+<!-- Auto-incrementing version code.
+
+This comment contains an Android version code
+(https://developer.android.com/studio/publish/versioning#versioningsettings)
+corresponding to the current Emacs version.  The version code in
+AndroidManifest.xml.in is hard-coded to a fixed value to facilitate
+package downgrades.  Some automated systems employed by Android package
+repositories require an incrementing numeric version code to detect
+upgrades, which is provided here and is altered by admin/admin.el.
+Refer to e.g. https://forum.f-droid.org/t/emacs-packaging/30424/25.
+
+Version-code: 300050000
+
+-->