Add armhf support.

ARM doesn't have a generic Linux image due to the soc-specific nature of Linux
kernels today, so we drop the manual installation of that package, replacing it
with a dist-upgrade instead. This involved tweaks to the dpkg and fedora
install-package scripts.

Change-Id: I97924b80ca87781307e1087b9fe4b18215770e84

README.md

@@ -17,9 +17,12 @@ OpenStack itself. These live in the TripleO elements repository
 What tools are there?
 ---------------------
 
-* disk-image-create -o filename {element} [{element} ...] : Create an image of
-  element {element}, optionally mixing in other elements. You will usually want
-  to include the "base" element in your image.
+* disk-image-create [-a i386|amd64|armhf] -o filename {element} [{element} ...]
+  Create an image of element {element}, optionally mixing in other elements.
+  Element dependencies are automatically included. Support for other
+  architectures depends on your environment being able to run binaries of that 
+  platform. For instance, to enable armhf on Ubuntu install the qemu-user-static
+  package.
 
 * ramdisk-image-create -o filename {element} [{element} ...] : Create a kernel+
   ramdisk pair for running maintenance on bare metal machines (deployment,
@@ -108,13 +111,13 @@ part of the process you need to customise:
   to blindly overwrite but instead to adapt the context extracted by other
   elements.
 
- * inputs: $ARCH=i386|amd64 $TARGET\_ROOT=/path/to/target/workarea
+ * inputs: $ARCH=i386|amd64|armhf $TARGET\_ROOT=/path/to/target/workarea
 
 * cleanup.d: Perform cleanups of the root filesystem content. For instance,
   temporary settings to use the image build environment HTTP proxy are removed
   here in the dpkg element. Runs outside the chroot on the host environment.
 
- * inputs: $ARCH=i386|amd64 $TARGET\_ROOT=/path/to/target/workarea
+ * inputs: $ARCH=i386|amd64|armhf $TARGET\_ROOT=/path/to/target/workarea
 
 * block-device-size.d: Alter the size (in GB) of the disk image. This is useful
   when a particular element will require a certain minimum (or maximum) size.

bin/disk-image-create

@@ -32,7 +32,7 @@ source $_LIB/die
 
 function show_options () {
     echo "Options:"
-    echo "    -a i386|amd64 -- set the architecture of the image"
+    echo "    -a i386|amd64|armhf -- set the architecture of the image"
     echo "    -o filename -- set the name of the output file"
     echo "    -x -- turn on tracing"
     echo "    -u -- uncompressed; do not compress the image - larger but faster"

elements/base/install.d/00-baseline-environment

@@ -3,4 +3,4 @@
 
 set -e
 
-install-packages linux-image-generic vlan open-iscsi
+install-packages vlan open-iscsi

elements/base/install.d/99-up-to-date

@@ -0,0 +1,7 @@
+#!/bin/bash
+# Fully upgrade everything on the system (if the package manager knows how to
+# do it).
+
+set -e
+
+install-packages -u

elements/dpkg/bin/install-packages

@@ -18,21 +18,17 @@
 set -e
 
 # install-packages package [package ...]
-install_deb_packages() {
+
+install_deb_packages () {
   DEBIAN_FRONTEND=noninteractive \
     http_proxy=$http_proxy https_proxy=$https_proxy \
     no_proxy=$no_proxy \
-    apt-get --option "Dpkg::Options::=--force-confold" --assume-yes install "$@"
+    apt-get --option "Dpkg::Options::=--force-confold" --assume-yes "$@"
 }
 
-DISTRO=`lsb_release -si`
-
-case $DISTRO in
-  'Ubuntu'|'Debian')
-    install_deb_packages $@
-    ;;
-  *)
-    echo "Distribution not supported"
-    exit 1
-    ;;
-esac
+if [ "$1" = "-u" ] ; then
+  install_deb_packages dist-upgrade
+  exit 0
+else
+  install_deb_packages install $@
+fi

elements/fedora/bin/install-packages

@@ -17,9 +17,14 @@
 
 set -e
 
+if [ "$1" = "-u" ] ; then
+  yum -y update
+  exit 0
+fi
+
 yum -y install $(map-packages "$@")
 for pkg in "$@"; do
-  if [[ "$pkg" == "python-pip" ]] ; then
+  if [ "$pkg" = "python-pip" ] ; then
     alternatives --install /usr/bin/pip pip /usr/bin/pip-python 10
   fi
 done