Force latest/stable/ubuntu-24.10 subiquity onto the ubuntu-core-installer ISO for now.

debian/changelog

@@ -1,3 +1,10 @@
+livecd-rootfs (24.04.76) UNRELEASED; urgency=medium
+
+  * Force latest/stable/ubuntu-24.10 subiquity onto the ubuntu-core-installer
+    ISO for now. (LP: #2077495)
+
+ -- Michael Hudson-Doyle <michael.hudson@ubuntu.com>  Mon, 19 Aug 2024 14:37:14 +1200
+
 livecd-rootfs (24.04.75) noble; urgency=medium
 
   * Add 'ubuntu-core-installer' project. (LP: #2076307)

live-build/functions

@@ -778,6 +778,12 @@ snap_preseed() {
         exit 1
     fi
 
+    if [ $PROJECT = ubuntu-core-installer ] && [ $SNAP_NAME = subiquity ]; then
+       # The ubuntu-core-installer project requires features not yet
+       # present in the latest/ubuntu/stable-24.04 or stable branches.
+       CHANNEL=latest/ubuntu/stable-24.10
+    fi
+
     _snap_preseed $CHROOT_ROOT $SNAP $CHANNEL
 
     # Mark this image as having snapd installed explicitly.