[AIRFLOW-6] Remove dependency on Highcharts

Highcharts' license is not compatible with the Apache 2.0
license. This patch removes Highcharts in favor of d3,
however some charts are not supported anymore.

* This brings Maxime Beauchemin's work to master

airflow/bin/airflow

@@ -1,4 +1,17 @@
 #!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 import logging
 import os
 from airflow import configuration

airflow/executors/base_executor.py

@@ -1,3 +1,17 @@
+# -*- coding: utf-8 -*-
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 from builtins import range
 
 from airflow import configuration

airflow/executors/celery_executor.py

@@ -1,3 +1,17 @@
+# -*- coding: utf-8 -*-
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 from builtins import object
 import logging
 import subprocess

airflow/hooks/__init__.py

@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-
 # Only import Core Airflow Operators that don't have extra requirements.
 # All other operators must be imported directly.
 from .base_hook import BaseHook
@@ -34,6 +33,7 @@
 # Imports the hooks dynamically while keeping the package API clean,
 # abstracting the underlying modules
 
+
 from airflow.utils.helpers import import_module_attrs as _import_module_attrs
 from airflow.hooks.base_hook import BaseHook  # noqa to expose in package
 

airflow/hooks/dbapi_hook.py

@@ -12,7 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-
 from builtins import str
 from past.builtins import basestring
 from datetime import datetime

airflow/hooks/jdbc_hook.py

@@ -13,13 +13,12 @@
 # limitations under the License.
 
 from builtins import str
-__author__ = 'janomar'
 
-import logging
 import jaydebeapi
 
 from airflow.hooks.dbapi_hook import DbApiHook
 
+
 class JdbcHook(DbApiHook):
     """
     General hook for jdbc db access.

airflow/hooks/oracle_hook.py

@@ -21,6 +21,7 @@
 import numpy
 import logging
 
+
 class OracleHook(DbApiHook):
     """
     Interact with Oracle SQL.

airflow/www/app.py

@@ -23,7 +23,7 @@
 from airflow import models
 from airflow.settings import Session
 
-from airflow.www.blueprints import ck, routes
+from airflow.www.blueprints import routes
 from airflow import jobs
 from airflow import settings
 from airflow import configuration
@@ -45,9 +45,7 @@ def create_app(config=None):
     cache = Cache(
         app=app, config={'CACHE_TYPE': 'filesystem', 'CACHE_DIR': '/tmp'})
 
-    app.register_blueprint(ck, url_prefix='/ck')
     app.register_blueprint(routes)
-    app.jinja_env.add_extension("chartkick.ext.charts")
 
     with app.app_context():
         from airflow.www import views

airflow/www/blueprints.py

@@ -15,14 +15,8 @@
 from flask import (
     url_for, Markup, Blueprint, redirect,
 )
-import chartkick
 import markdown
 
-# Init for chartkick, the python wrapper for highcharts
-ck = Blueprint(
-    'ck_page', __name__,
-    static_folder=chartkick.js(), static_url_path='/static')
-
 routes = Blueprint('routes', __name__)