Add a kernel-install plugin to execute hook scripts in /etc/kernel/

The kernel hook scripts in /etc/kernel/postinst.d and /etc/kernel/prerm.d
were executed by the new-kernel-pkg --rpmposttrans and --remove options.

But with a BLS configuration the new-kernel-pkg script isn't executed and
instead the kernel-install plugins are used. Add a kernel-install plugin
that executes the hooks since packages like dkms and akmod make use of it.

Resolves: rhbz#1696202

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>

95-kernel-hooks.install

@@ -0,0 +1,33 @@
+#!/usr/bin/bash
+
+if ! [[ $KERNEL_INSTALL_MACHINE_ID ]]; then
+    exit 0
+fi
+
+COMMAND="$1"
+KERNEL_VERSION="$2"
+BOOT_DIR_ABS="$3"
+
+# If $BOOT_DIR_ABS exists, some other boot loader is active.
+[[ -d "$BOOT_DIR_ABS" ]] && exit 0
+
+run_hooks()
+{
+    local f
+    local files="$1"
+    for f in $files ; do
+        [ -x "$f" ] || continue
+        "$f" "$KERNEL_VERSION" "/boot/vmlinuz-$KERNEL_VERSION"
+    done
+}
+
+case "$COMMAND" in
+    add)
+        run_hooks "/etc/kernel/postinst.d/*[^~] /etc/kernel/postinst.d/$KERNEL_VERSION/*[^~]"
+        ;;
+    remove)
+        run_hooks "/etc/kernel/prerm.d/*[^~] /etc/kernel/prerm.d/$KERNEL_VERSION/*[^~]"
+        ;;
+    *)
+        exit 0
+esac

grubby.spec

@@ -1,6 +1,6 @@
 Name: grubby
 Version: 8.40
-Release: 33%{?dist}
+Release: 34%{?dist}
 Summary: Command line tool for updating bootloader configs
 License: GPLv2+
 URL: https://github.com/rhinstaller/grubby
@@ -13,6 +13,7 @@ Source1: grubby-bls
 Source2: grubby.in
 Source3: installkernel.in
 Source4: installkernel-bls
+Source5: 95-kernel-hooks.install
 Patch0001: 0001-remove-the-old-crufty-u-boot-support.patch
 Patch0002: 0002-Change-return-type-in-getRootSpecifier.patch
 Patch0003: 0003-Add-btrfs-subvolume-support-for-grub2.patch
@@ -81,6 +82,7 @@ sed -e "s,@@LIBEXECDIR@@,%{_libexecdir}/grubby,g" %{SOURCE2} \
 	> %{buildroot}%{_sbindir}/grubby
 sed -e "s,@@LIBEXECDIR@@,%{_libexecdir}/installkernel,g" %{SOURCE3} \
 	> %{buildroot}%{_sbindir}/installkernel
+install -D -m 0755 -t %{buildroot}%{_prefix}/lib/kernel/install.d/ %{SOURCE5}
 
 %post
 if [ "$1" = 2 ]; then
@@ -113,6 +115,7 @@ current boot environment.
 %attr(0755,root,root) %{_sbindir}/grubby
 %attr(0755,root,root) %{_libexecdir}/installkernel/installkernel-bls
 %attr(0755,root,root) %{_sbindir}/installkernel
+%attr(0755,root,root) %{_prefix}/lib/kernel/install.d/95-kernel-hooks.install
 %{_mandir}/man8/[gi]*.8*
 
 %files deprecated
@@ -128,6 +131,10 @@ current boot environment.
  %{_mandir}/man8/*.8*
 
 %changelog
+* Mon Jun 17 2019 Javier Martinez Canillas <javierm@redhat.com> - 8.40-34
+- Add a kernel-install plugin to execute hook scripts in /etc/kernel/
+  Resolves: rhbz#1696202
+
 * Mon Jun 10 22:13:19 CET 2019 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 8.40-33
 - Rebuild for RPM 4.15