From c9a6aef9f4360759b2f52611be0b3c56ae8ce40a Mon Sep 17 00:00:00 2001
From: James Slagle <jslagle@redhat.com>
Date: Wed, 31 Jul 2013 09:37:57 -0400
Subject: [PATCH] Add yum element.

The yum element provides for specific customizations
for yum based distros.  The included customization is
a yum cache mounted outside of the chroot so that yum
downloaded packages are reused on subsequent image builds.

Change-Id: I6833c9fdbc83cb09debec6a789082e105c917800
---
 elements/fedora/element-deps                |  1 +
 elements/yum/README.md                      | 10 ++++++++++
 elements/yum/pre-install.d/01-yum-keepcache |  8 ++++++++
 elements/yum/root.d/50-yum-cache            | 11 +++++++++++
 4 files changed, 30 insertions(+)
 create mode 100644 elements/yum/README.md
 create mode 100755 elements/yum/pre-install.d/01-yum-keepcache
 create mode 100755 elements/yum/root.d/50-yum-cache

diff --git a/elements/fedora/element-deps b/elements/fedora/element-deps
index 386e17306..d04ce43de 100644
--- a/elements/fedora/element-deps
+++ b/elements/fedora/element-deps
@@ -2,3 +2,4 @@ dib-run-parts
 dracut-network
 cache-url
 dkms
+yum
diff --git a/elements/yum/README.md b/elements/yum/README.md
new file mode 100644
index 000000000..b38a94fef
--- /dev/null
+++ b/elements/yum/README.md
@@ -0,0 +1,10 @@
+Provide yum specific image building glue.
+
+RHEL/Fedora/CentOS and other yum based distributions need specific yum
+customizations.
+
+Customizations include caching of downloaded yum packages outside of the build
+chroot so that they can be reused by subsequent image builds.  The cache
+increases image building speed when building multiple images, especially on
+slow connections.  This is more effective than using an HTTP proxy as a yum
+cache since the same rpm from different mirrors is often requested.
diff --git a/elements/yum/pre-install.d/01-yum-keepcache b/elements/yum/pre-install.d/01-yum-keepcache
new file mode 100755
index 000000000..2ada3e0b1
--- /dev/null
+++ b/elements/yum/pre-install.d/01-yum-keepcache
@@ -0,0 +1,8 @@
+#!/bin/bash
+
+set -e
+
+[ -n "TARGET_ROOT" ]
+
+sudo sed -i 's/keepcache=0/keepcache=1/' $TARGET_ROOT/etc/yum.conf
+sudo sed -i 's/cachedir=\/var\/cache\/yum/cachedir=\/tmp\/yum/' $TARGET_ROOT/etc/yum.conf
diff --git a/elements/yum/root.d/50-yum-cache b/elements/yum/root.d/50-yum-cache
new file mode 100755
index 000000000..f7dd92472
--- /dev/null
+++ b/elements/yum/root.d/50-yum-cache
@@ -0,0 +1,11 @@
+#!/bin/bash
+
+set -e
+
+[ -n "TARGET_ROOT" ]
+
+YUM_CACHE_DIR=~/.cache/image-create/yum
+mkdir -p $YUM_CACHE_DIR
+
+sudo mkdir -p $TMP_MOUNT_PATH/tmp/yum
+sudo mount --bind $YUM_CACHE_DIR $TMP_MOUNT_PATH/tmp/yum