add --host command line argument (#20)

* add --host command line argument

* update readme and changelog

* fix version and changelog

Author: kanekv

CHANGELOG.md

@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+- Add support for `--host` flag ([#20])
+
 ## [1.1.1] - 2020-02-06
 ### Added
 - Add support for `--dry-run` flag ([#14])
@@ -36,6 +39,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [1.0.1]: https://github.com/GoogleCloudPlatform/functions-framework-python/releases/tag/v1.0.1
 [1.0.0]: https://github.com/GoogleCloudPlatform/functions-framework-python/releases/tag/v1.0.0
 
+[#20]: https://github.com/GoogleCloudPlatform/functions-framework-python/pull/20
 [#14]: https://github.com/GoogleCloudPlatform/functions-framework-python/pull/14
 [#12]: https://github.com/GoogleCloudPlatform/functions-framework-python/pull/12
 [#8]:  https://github.com/GoogleCloudPlatform/functions-framework-python/pull/8

README.md

@@ -124,13 +124,14 @@ Cloud Run and Cloud Run on GKE both implement the [Knative Serving API](https://
 
 You can configure the Functions Framework using command-line flags or environment variables. If you specify both, the environment variable will be ignored.
 
-Command-line flag         | Environment variable      | Description
-------------------------- | ------------------------- | -----------
-`--port`                    | `PORT`                    | The port on which the Functions Framework listens for requests. Default: `8080`
-`--target`         | `FUNCTION_TARGET`         | The name of the exported function to be invoked in response to requests. Default: `function`
-`--signature-type` | `FUNCTION_SIGNATURE_TYPE` | The signature used when writing your function. Controls unmarshalling rules and determines which arguments are used to invoke your function. Default: `http`; accepted values: `http` or `event`
-`--source`         | `FUNCTION_SOURCE`         | The path to the file containing your function. Default: `main.py` (in the current working directory)
-`--debug`          | `DEBUG`                   | A flag that allows to run functions-framework to run in debug mode, including live reloading. Default: `False`
+| Command-line flag  | Environment variable      | Description                                                                                                                                                                                      |
+| ------------------ | ------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
+| `--host`           | `HOST`                    | The host on which the Functions Framework listens for requests. Default: `0.0.0.0`                                                                                                               |
+| `--port`           | `PORT`                    | The port on which the Functions Framework listens for requests. Default: `8080`                                                                                                                  |
+| `--target`         | `FUNCTION_TARGET`         | The name of the exported function to be invoked in response to requests. Default: `function`                                                                                                     |
+| `--signature-type` | `FUNCTION_SIGNATURE_TYPE` | The signature used when writing your function. Controls unmarshalling rules and determines which arguments are used to invoke your function. Default: `http`; accepted values: `http` or `event` |
+| `--source`         | `FUNCTION_SOURCE`         | The path to the file containing your function. Default: `main.py` (in the current working directory)                                                                                             |
+| `--debug`          | `DEBUG`                   | A flag that allows to run functions-framework to run in debug mode, including live reloading. Default: `False`                                                                                   |
 
 # Enable CloudEvents
 

src/functions_framework/cli.py

@@ -28,11 +28,11 @@
     type=click.Choice(["http", "event"]),
     default="http",
 )
+@click.option("--host", envvar="HOST", type=click.STRING, default="0.0.0.0")
 @click.option("--port", envvar="PORT", type=click.INT, default=8080)
 @click.option("--debug", envvar="DEBUG", is_flag=True)
 @click.option("--dry-run", envvar="DRY_RUN", is_flag=True)
-def cli(target, source, signature_type, port, debug, dry_run):
-    host = "0.0.0.0"
+def cli(target, source, signature_type, host, port, debug, dry_run):
     app = create_app(target, source, signature_type)
     if dry_run:
         click.echo("Function: {}".format(target))

tests/test_cli.py

@@ -88,6 +88,12 @@ def test_cli_no_arguments():
             [pretend.call("foo", None, "http")],
             [],
         ),
+        (
+            ["--target", "foo", "--host", "127.0.0.1"],
+            {},
+            [pretend.call("foo", None, "http")],
+            [pretend.call("127.0.0.1", 8080, False)],
+        ),
     ],
 )
 def test_cli_arguments(create_app, run, args, env, create_app_calls, run_calls):