bootloader: remove extlinux/syslinux path

This is a first pass through the bootloader, that removes the extlinux
and syslinux install/cleanup path.

Change-Id: Ifb107796cdb6748430a124bf13ced93db9689bff

diskimage_builder/elements/bootloader/README.rst

@@ -2,10 +2,7 @@
 bootloader
 ==========
 
-Installs ``grub[2]`` on boot partition on the system. In case GRUB2 is
-not available in the system, a fallback to Extlinux will happen. It's
-also possible to enforce the use of Extlinux by exporting a
-``DIB_EXTLINUX`` variable to the environment.
+Installs ``grub[2]`` on boot partition on the system.
 
 Arguments
 =========

diskimage_builder/elements/bootloader/cleanup.d/51-bootloader

@@ -1,55 +0,0 @@
-#!/bin/bash
-#
-# Copyright 2014 Hewlett-Packard Development Company, L.P.
-# All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-# dib-lint: disable=safe_sudo
-
-if [ ${DIB_DEBUG_TRACE:-1} -gt 0 ]; then
-    set -x
-fi
-set -eu
-set -o pipefail
-
-[ -n "$TARGET_ROOT" ]
-
-source $_LIB/img-functions
-
-if [ -d $TARGET_ROOT/boot/extlinux ] ; then
-    CONF=$TARGET_ROOT/boot/extlinux/extlinux.conf
-elif [ -d $TARGET_ROOT/boot/syslinux ] ; then
-    CONF=$TARGET_ROOT/boot/syslinux/syslinux.cfg
-else
-    exit 0
-fi
-
-# Dig up the initrd and kernel to use.
-select_boot_kernel_initrd $TARGET_ROOT
-
-# Serial console on Power is hvc0
-if [[ "powerpc ppc64 ppc64le" =~ "$ARCH" ]] ; then
-    SERIAL_CONSOLE="hvc0"
-else
-    SERIAL_CONSOLE="ttyS0,115200"
-fi
-
-sudo sh -c "cat > $CONF <<_EOF_
-DEFAULT linux
-
-LABEL linux
-    KERNEL /boot/$KERNEL
-    APPEND ro root=LABEL=${DIB_ROOT_LABEL} console=tty0 console=${SERIAL_CONSOLE} nofb nomodeset gfxpayload=text
-    INITRD /boot/$RAMDISK
-_EOF_"

diskimage_builder/elements/bootloader/finalise.d/50-bootloader

@@ -9,57 +9,26 @@ fi
 set -eu
 set -o pipefail
 
-BOOT_DEV=$IMAGE_BLOCK_DEVICE
+if [ ${DIB_EXTLINUX:-0} != "0" ]; then
+    echo "DIB_EXTLINUX no longer supported"
+    exit 1
+fi
 
+# Some distros have pre-installed grub in some other way, and want to
+# skip this.
+if [[ -f "/tmp/grub/install" ]]; then
+    exit 0
+fi
+
+BOOT_DEV=$IMAGE_BLOCK_DEVICE
 # All available devices, handy for some bootloaders...
 declare -A DEVICES
 eval DEVICES=( $IMAGE_BLOCK_DEVICES )
 
-function install_extlinux {
-    install-packages -m bootloader extlinux
-
-    echo "Installing Extlinux..."
-
-    # Find and install mbr.bin
-    for MBR in /usr/share/syslinux/mbr.bin /usr/lib/syslinux/mbr.bin \
-        /usr/lib/extlinux/mbr.bin /usr/lib/EXTLINUX/mbr.bin ; do
-        if [ -f $MBR ]; then
-            break
-        fi
-    done
-    if [ ! -f $MBR ]; then
-        echo "mbr.bin (from EXT/SYSLINUX) not found."
-        exit 1
-    fi
-
-    dd if=$MBR of=$BOOT_DEV
-
-    # Find any pre-created extlinux install directory
-    for EXTDIR in /boot/extlinux /boot/syslinux ; do
-        if [ -d $EXTDIR ] ; then
-            break
-        fi
-    done
-    if [ ! -d $EXTDIR ] ; then
-        # No install directory found so default to /boot/syslinux
-        EXTDIR=/boot/syslinux
-        mkdir -p $EXTDIR
-    fi
-
-    # Finally install extlinux
-    extlinux --install $EXTDIR
-}
-
-function install_grub2 {
-
-    # Check for offline installation of grub
-    if [ -f "/tmp/grub/install" ] ; then
-        source /tmp/grub/install
-
 # Right now we can't use pkg-map to branch by arch, so tag an
 # architecture specific virtual package so we can install the
 # rigth thing based on distribution.
-    elif [[ "$ARCH" =~ "ppc" ]]; then
+if [[ "$ARCH" =~ "ppc" ]]; then
     install-packages -m bootloader grub-ppc64
 elif [[ "${DIB_BLOCK_DEVICE}" == "mbr" ||
             "${DIB_BLOCK_DEVICE}" == "gpt" ]]; then
@@ -73,8 +42,6 @@ function install_grub2 {
     exit 1
 fi
 
-    # XXX: grub-probe on the nbd0/loop0 device returns nothing - workaround, manually
-    # specify modules. https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1073731
 GRUBNAME=$(type -p grub-install) || echo "trying grub2-install"
 if [ -z "$GRUBNAME" ]; then
     GRUBNAME=$(type -p grub2-install)
@@ -86,13 +53,6 @@ function install_grub2 {
     GRUB_MKCONFIG="grub-mkconfig"
 fi
 
-    # If no GRUB2 is found, fallback to extlinux
-    if [ -z "$GRUBNAME" ] || [ $($GRUBNAME --version | grep "0.97" | wc -l) -ne 0 ]; then
-        echo "No GRUB2 found. Fallback to Extlinux..."
-        install_extlinux
-        exit 0
-    fi
-
 echo "Installing GRUB2..."
 
 # When using EFI image-based builds, particularly rhel element
@@ -266,14 +226,6 @@ function install_grub2 {
     sed -i '$d' /etc/default/grub
 fi
 
-    # grub-mkconfig generates a config with the device in it,
-    # This shouldn't be needed, but old code has bugs
-    DIB_RELEASE=${DIB_RELEASE:-}
-    if [ "$DIB_RELEASE" = 'wheezy' ]; then
-        sed -i "s%search --no.*%%" $GRUB_CFG
-        sed -i "s%set root=.*%set root=(hd0,1)%" $GRUB_CFG
-    fi
-
 # Fix efi specific instructions in grub config file
 if [ -d /sys/firmware/efi ]; then
     sed -i 's%\(initrd\|linux\)efi /boot%\1 /boot%g' $GRUB_CFG
@@ -294,11 +246,4 @@ function install_grub2 {
         cp $GRUB_CFG /boot/efi/$EFI_BOOT_DIR/grub.cfg
     fi
 fi
-}
 
-DIB_EXTLINUX=${DIB_EXTLINUX:-0}
-if [ "$DIB_EXTLINUX" != "0" ]; then
-    install_extlinux
-else
-    install_grub2
-fi

releasenotes/notes/bootloader-extlinux-cf5ca0a5c9ef4544.yaml

@@ -0,0 +1,5 @@
+---
+deprecations:
+  - |
+    Removed support for ``extlinux`` and ``grub`` (as opposed to
+    ``grub2``) support from the bootloader element.