added serve cli command to start default flask server (#112)

* added serve cli command to start default flask server

* pep8 fixes

* fixed debug param typo

* changed behavior of serve without arguments to run default services

* updated README.md with new serve command

README.md

@@ -34,7 +34,7 @@ pytest mapshader/tests -sv
 #### Run Flask Server
 ```bash
 conda activate mapshader
-python mapshader/flask_app.py
+mapshader serve
 
 >>> * Serving Flask app "flask_app" (lazy loading)
 >>> * Environment: production
@@ -96,7 +96,7 @@ This configuration file can then be passed to the flask server upon startup:
 
 ```bash
 conda activate mapshader
-python mapshader/flask_app.py -f my_services.yaml
+mapshader serve my_services.yaml
 
 >>> * Serving Flask app "flask_app" (lazy loading)
 >>> * Environment: production

mapshader/commands/serve.py

@@ -0,0 +1,54 @@
+import click
+
+from ..flask_app import create_app
+
+
+@click.command(
+    context_settings=dict(help_option_names=['-h', '--help']),
+    short_help='Start default mapshader server using Flask',
+    help=(
+        'Start default mapshader server using Flask'
+    ),
+)
+@click.argument(
+    'config_yaml',
+    type=str,
+    required=False,
+)
+@click.option(
+    '--host',
+    'host',
+    default='0.0.0.0',
+    type=str,
+    help='Host of Flask server',
+)
+@click.option(
+    '--port',
+    'port',
+    default=5000,
+    type=int,
+    help='Port number of Flask server',
+)
+@click.option(
+    '--glob',
+    'glob',
+    required=False,
+    type=str,
+    help='Filter services to start based on glob',
+)
+@click.option(
+    '--debug',
+    'debug',
+    is_flag=True,
+    default=False,
+    help='Run server in debug mode',
+)
+def serve(config_yaml=None, host='0.0.0.0', port=5000, glob=None, debug=False):
+
+    from os import path
+
+    if config_yaml:
+        config_yaml = path.abspath(path.expanduser(config_yaml))
+
+    create_app(config_yaml, contains=glob).run(
+        host=host, port=port, debug=debug)

setup.py

@@ -59,6 +59,7 @@
         build_raster_overviews=mapshader.commands.build_raster_overviews:build_raster_overviews
         examples=mapshader.commands.examples:examples
         tif_to_netcdf=mapshader.commands.tif_to_netcdf:tif_to_netcdf
+        serve=mapshader.commands.serve:serve
     ''',
 )