#!/usr/bin/env bash

# This script was made by a master bash hacker, hence to following 2 settings
set -o errexit
set -o nounset

cat << EOF
django-bootstrap -- generates a complete django project

usage: django-bootstrap [app_name] [project_name] [virtualenv_path/name] [admin_name (default=admin)] [admin_password (default=admin)]

A Django "project" is a collection of 1 or more "apps", and should go into a "virtualenv".
This script will create a directory structure for you like so: virtualenv/project/app/...
EOF

[[ ${#@} -ge 1 ]] && app=$1 || read -p "What would you like to name your app? " app;
[[ ${#@} -ge 2 ]] && project=$2 || read -p "What would you like to name your project? (It cannot be $app.) " project;
[[ ${#@} -ge 3 ]] && virtualenv=$3 || read -p "What would you like to name your virtualenv? [$project] " virtualenv;
[[ ${#@} -ge 4 ]] && superusername=$4 || superusername=admin
[[ ${#@} -ge 5 ]] && superuserpass=$5 || superuserpass=admin
[[ $app == $project ]] && echo "Error: You cannot create an app with the same name ('$project') as your project." && exit

# prepare the virtualenv
virtualenv $virtualenv
cd $virtualenv
virtualenv --relocatable .
echo "export DJANGO_SETTINGS_MODULE=settings" >> bin/activate

# install Django
set +o nounset # the activate script has a bug that makes it not safe to use with nounset
source bin/activate
set -o nounset
pip install django

# create the Django project and app
django-admin.py startproject $project
(cd $project && django-admin.py startapp $app)
patch -p0 << EOF
--- $project/settings.py	2011-06-03 22:12:29.000000000 -0400
+++ $project/settings.py	2011-06-03 22:17:41.000000000 -0400
@@ -2,6 +2,8 @@

 DEBUG = True
 TEMPLATE_DEBUG = DEBUG
+import os
+PROJECT_DIR = os.path.abspath(os.path.dirname(__file__))

 ADMINS = (
     # ('Your Name', 'your_email@example.com'),
@@ -11,8 +13,8 @@

 DATABASES = {
     'default': {
-        'ENGINE': 'django.db.backends.', # Add 'postgresql_psycopg2', 'postgresql', 'mysql', 'sqlite3' or 'oracle'.
-        'NAME': '',                      # Or path to database file if using sqlite3.
+        'ENGINE': 'django.db.backends.sqlite3', # Add 'postgresql_psycopg2', 'postgresql', 'mysql', 'sqlite3' or 'oracle'.
+        'NAME': os.path.join(PROJECT_DIR, 'data.sqlite3'),                      # Or path to database file if using sqlite3.
         'USER': '',                      # Not used with sqlite3.
         'PASSWORD': '',                  # Not used with sqlite3.
         'HOST': '',                      # Set to empty string for localhost. Not used with sqlite3.
@@ -116,9 +118,10 @@
     'django.contrib.messages',
     'django.contrib.staticfiles',
     # Uncomment the next line to enable the admin:
-    # 'django.contrib.admin',
+    'django.contrib.admin',
     # Uncomment the next line to enable admin documentation:
     # 'django.contrib.admindocs',
+    '$app',
 )

 # A sample logging configuration. The only tangible logging
--- $project/urls.py    2011-06-03 23:27:47.000000000 -0400
+++ $project/urls.py    2011-06-03 23:44:31.000000000 -0400
@@ -1,8 +1,8 @@
 from django.conf.urls.defaults import patterns, include, url

 # Uncomment the next two lines to enable the admin:
-# from django.contrib import admin
-# admin.autodiscover()
+from django.contrib import admin
+admin.autodiscover()

 urlpatterns = patterns('',
     # Examples:
@@ -13,5 +13,5 @@
     # url(r'^admin/doc/', include('django.contrib.admindocs.urls')),

     # Uncomment the next line to enable the admin:
-    # url(r'^admin/', include(admin.site.urls)),
+    url(r'^admin/', include(admin.site.urls)),
 )
EOF

# add your project path the Python sys.path the your code can be found
echo "../../../$project" > $(p=(lib/python*/site-packages); echo ${p[0]})/$project.pth

# prepare the database
django-admin.py syncdb --noinput
echo "creating django superuser with login:$superusername and password:$superuserpass...";
django-admin.py shell << EOF > /dev/null 2>&1
from django.contrib.auth.models import User
(admin,created) = User.objects.get_or_create(username='$superusername')
admin.is_staff=True
admin.is_active=True
admin.is_superuser=True
admin.set_password('$superuserpass')
admin.save()
EOF

cat << EOF
Your project has been setup at $(cd $project && pwd) and your SQLite3 database has been created.
You can get started by running:
cd $virtualenv/$project; source ../bin/activate; django-admin.py runserver

Tip: As you develop you may find yourself needing to blow away all of the data in your app(s) and keep the django (auth.user, etc.) tables. Here's a oneliner for that:
echo '.tables' | sqlite3 data.sqlite3 | xargs -n1 | grep -vE '^(auth|django)' | while read table; do echo "drop table \$table;" | sqlite3 data.sqlite3; done; django-admin.py syncdb
EOF