limit grub-install diversion on snappy images to x86 architectures

debian/changelog

@@ -1,3 +1,9 @@
+livecd-rootfs (2.348) UNRELEASED; urgency=medium
+
+  * limit grub-install diversion on snappy images to x86 architectures
+
+ -- Oliver Grawert <ogra@ubuntu.com>  Fri, 09 Oct 2015 12:52:57 +0200
+
 livecd-rootfs (2.347) wily; urgency=medium
 
   * divert grub-install on snappy images during rootfs build

live-build/ubuntu-core/hooks/01-divert-grub-install.chroot_early

@@ -1,13 +1,19 @@
 #!/bin/sh -ex
 
-dpkg-divert --quiet --add \
+ARCH=$(dpkg --print-architecture)
-        --divert /usr/sbin/grub-install.REAL --rename \
-        /usr/sbin/grub-install
 
-cat > /usr/sbin/grub-install <<'EOF'
+case $ARCH in
+    i386|amd64)
+        dpkg-divert --quiet --add \
+                --divert /usr/sbin/grub-install.REAL --rename \
+                /usr/sbin/grub-install
+
+        cat > /usr/sbin/grub-install <<'EOF'
 #! /bin/sh
 echo "grub-install: diverted by livecd-rootfs (will be called later)" >&2
 exit 0
 EOF
 
-chmod +x /usr/sbin/grub-install
+        chmod +x /usr/sbin/grub-install
+    ;;
+esac

live-build/ubuntu-core/hooks/99-undivert-grub-install.chroot

@@ -1,4 +1,10 @@
 #! /bin/sh -ex
 
-rm -f /usr/sbin/grub-install
+ARCH=$(dpkg --print-architecture)
-dpkg-divert --quiet --remove --rename /usr/sbin/grub-install
+
+case $ARCH in
+    i386|amd64)
+        rm -f /usr/sbin/grub-install
+        dpkg-divert --quiet --remove --rename /usr/sbin/grub-install
+    ;;
+esac