Allow for Nova to use os-brick from git

This option to install os-brick from git was only added
into lib/cinder previously. When testing all-in-one nodes
this worked fine, but if you have multi-node setups with
compute nodes that don't install any c-* services we
only get packaged os-brick. With this change non-cinder
nodes can now test against unreleased os-bricks.

Change-Id: Ibb7423d243d57852dada0b6298463bbdfc6dc63c

lib/cinder

@@ -39,7 +39,6 @@ fi
 
 # set up default directories
 GITDIR["python-cinderclient"]=$DEST/python-cinderclient
-GITDIR["os-brick"]=$DEST/os-brick
 GITDIR["python-brick-cinderclient-ext"]=$DEST/python-brick-cinderclient-ext
 CINDER_DIR=$DEST/cinder
 
@@ -445,13 +444,6 @@ function init_cinder {
 
 # install_cinder() - Collect source and prepare
 function install_cinder {
-    # Install os-brick from git so we make sure we're testing
-    # the latest code.
-    if use_library_from_git "os-brick"; then
-        git_clone_by_name "os-brick"
-        setup_dev_lib "os-brick"
-    fi
-
     git_clone $CINDER_REPO $CINDER_DIR $CINDER_BRANCH
     setup_develop $CINDER_DIR
     if [ "$CINDER_ISCSI_HELPER" = "tgtadm" ]; then

lib/os_brick

@@ -0,0 +1,29 @@
+#!/bin/bash
+#
+# lib/os_brick
+# Install **os-brick** python module from source
+
+# Dependencies:
+#
+# - functions
+# - DEST, DATA_DIR must be defined
+
+# stack.sh
+# ---------
+# - install_os_brick
+
+# Save trace setting
+_XTRACE_CINDER=$(set +o | grep xtrace)
+set +o xtrace
+
+
+GITDIR["os-brick"]=$DEST/os-brick
+
+# Install os_brick from git only if requested, otherwise it will be pulled from
+# pip repositories by requirements of projects that need it.
+function install_os_brick {
+    if use_library_from_git "os-brick"; then
+        git_clone_by_name "os-brick"
+        setup_dev_lib "os-brick"
+    fi
+}

stack.sh

@@ -570,6 +570,7 @@ source $TOP_DIR/lib/neutron-legacy
 source $TOP_DIR/lib/ldap
 source $TOP_DIR/lib/dstat
 source $TOP_DIR/lib/dlm
+source $TOP_DIR/lib/os_brick
 
 # Extras Source
 # --------------
@@ -796,6 +797,11 @@ if is_service_enabled heat horizon; then
     install_heatclient
 fi
 
+# Install shared libraries
+if is_service_enabled cinder nova; then
+    install_os_brick
+fi
+
 # Install middleware
 install_keystonemiddleware