Introduce get_python_exec_prefix function.

get_python_exec_prefix returns the path to the direcotry where python
executables are installed, that is /usr/bin on Fedora and /usr/local/bin
everywhere else.

It is used to properly locate OpenStack executables.

Fixes: bug #1068386

Change-Id: I228498ebe2762568d00757d065e37377ee2c8fb3

functions

@@ -1110,17 +1110,23 @@ function add_user_to_group() {
 }
 
 
+# Get the path to the direcotry where python executables are installed.
+# get_python_exec_prefix
+function get_python_exec_prefix() {
+    if is_fedora; then
+        echo "/usr/bin"
+    else
+        echo "/usr/local/bin"
+    fi
+}
+
 # Get the location of the $module-rootwrap executables, where module is cinder
 # or nova.
 # get_rootwrap_location module
 function get_rootwrap_location() {
     local module=$1
 
-    if is_fedora; then
-        echo "/usr/bin/$module-rootwrap"
-    else
-        echo "/usr/local/bin/$module-rootwrap"
-    fi
+    echo "$(get_python_exec_prefix)/$module-rootwrap"
 }
 
 # Get the path to the pip command.

lib/ceilometer

@@ -40,7 +40,7 @@ CEILOMETER_AUTH_CACHE_DIR=${CEILOMETER_AUTH_CACHE_DIR:-/var/cache/ceilometer}
 if [ -d $CEILOMETER_DIR/bin ] ; then
     CEILOMETER_BIN_DIR=$CEILOMETER_DIR/bin
 else
-    CEILOMETER_BIN_DIR=/usr/local/bin
+    CEILOMETER_BIN_DIR=$(get_python_exec_prefix)
 fi
 
 # cleanup_ceilometer() - Remove residual data files, anything left over from previous

lib/cinder

@@ -47,7 +47,7 @@ CINDER_SERVICE_PROTOCOL=${CINDER_SERVICE_PROTOCOL:-$SERVICE_PROTOCOL}
 if [[ -d $CINDER_DIR/bin ]]; then
     CINDER_BIN_DIR=$CINDER_DIR/bin
 else
-    CINDER_BIN_DIR=/usr/local/bin
+    CINDER_BIN_DIR=$(get_python_exec_prefix)
 fi
 
 # Name of the lvm volume group to use/create for iscsi volumes

lib/glance

@@ -44,7 +44,7 @@ GLANCE_POLICY_JSON=$GLANCE_CONF_DIR/policy.json
 if [[ -d $GLANCE_DIR/bin ]]; then
     GLANCE_BIN_DIR=$GLANCE_DIR/bin
 else
-    GLANCE_BIN_DIR=/usr/local/bin
+    GLANCE_BIN_DIR=$(get_python_exec_prefix)
 fi
 
 # Glance connection info.  Note the port must be specified.

lib/nova

@@ -49,7 +49,7 @@ NOVA_SERVICE_PROTOCOL=${NOVA_SERVICE_PROTOCOL:-$SERVICE_PROTOCOL}
 if [[ -d $NOVA_DIR/bin ]]; then
     NOVA_BIN_DIR=$NOVA_DIR/bin
 else
-    NOVA_BIN_DIR=/usr/local/bin
+    NOVA_BIN_DIR=$(get_python_exec_prefix)
 fi
 
 # Set the paths of certain binaries