From dab3332f96033dc7d2be83d396302202d0a9681b Mon Sep 17 00:00:00 2001
From: James Page <james.page@ubuntu.com>
Date: Tue, 22 Sep 2015 14:55:23 +0100
Subject: [PATCH] Ensure python2 is installed before hook execution

---
 hooks/install                      | 21 ++++++++++++++++++++-
 hooks/install.real                 |  1 +
 hooks/rabbitmq_server_relations.py |  2 +-
 3 files changed, 22 insertions(+), 2 deletions(-)
 mode change 120000 => 100755 hooks/install
 create mode 120000 hooks/install.real

diff --git a/hooks/install b/hooks/install
deleted file mode 120000
index eecaaa74..00000000
--- a/hooks/install
+++ /dev/null
@@ -1 +0,0 @@
-rabbitmq_server_relations.py
\ No newline at end of file
diff --git a/hooks/install b/hooks/install
new file mode 100755
index 00000000..83a9d3ce
--- /dev/null
+++ b/hooks/install
@@ -0,0 +1,20 @@
+#!/bin/bash
+# Wrapper to deal with newer Ubuntu versions that don't have py2 installed
+# by default.
+
+declare -a DEPS=('apt' 'netaddr' 'netifaces' 'pip' 'yaml')
+
+check_and_install() {
+    pkg="${1}-${2}"
+    if ! dpkg -s ${pkg} 2>&1 > /dev/null; then
+        apt-get -y install ${pkg}
+    fi
+}
+
+PYTHON="python"
+
+for dep in ${DEPS[@]}; do
+    check_and_install ${PYTHON} ${dep}
+done
+
+exec ./hooks/install.real
diff --git a/hooks/install.real b/hooks/install.real
new file mode 120000
index 00000000..eecaaa74
--- /dev/null
+++ b/hooks/install.real
@@ -0,0 +1 @@
+rabbitmq_server_relations.py
\ No newline at end of file
diff --git a/hooks/rabbitmq_server_relations.py b/hooks/rabbitmq_server_relations.py
index 9e5a8c59..02e66862 100755
--- a/hooks/rabbitmq_server_relations.py
+++ b/hooks/rabbitmq_server_relations.py
@@ -101,7 +101,7 @@ STATS_DATAFILE = os.path.join(RABBIT_DIR, 'data',
                               ''.format(socket.gethostname()))
 
 
-@hooks.hook('install')
+@hooks.hook('install.real')
 def install():
     pre_install_hooks()
     # NOTE(jamespage) install actually happens in config_changed hook