Python: Create Makefile for development shortcuts (#488)

README.md

@@ -51,12 +51,12 @@ See [Premake5](https://premake.github.io/)
 
 #### Python
 
-The basic commands to build, test, and install the Python module are:
+To install the Python module from source, run the following:
 
-    $ python setup.py build test
     $ python setup.py install
 
-See the [Python readme](python/README.md) for more details.
+See the [Python readme](python/README.md) for more details on testing
+and development.
 
 ### Benchmarks
 * [Squash Compression Benchmark](https://quixdb.github.io/squash-benchmark/) / [Unstable Squash Compression Benchmark](https://quixdb.github.io/squash-benchmark/unstable/)

python/Makefile

@@ -0,0 +1,49 @@
+# Copyright 2016 The Brotli Authors. All rights reserved.
+#
+# Distributed under MIT license.
+# See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+
+
+# Default
+.PHONY: all
+# Build
+.PHONY: build
+# Test
+.PHONY: test tests
+# Clean
+.PHONY: clean
+# Format
+.PHONY: fix
+
+
+PYTHON ?= python
+YAPF ?= yapf
+
+EXT_SUFFIX=$(shell $(PYTHON) -c 'import sysconfig; print(sysconfig.get_config_var("EXT_SUFFIX"))')
+EXT_SOURCES=$(shell find . -name '*.cc')
+EXTENSIONS=$(EXT_SOURCES:%.cc=%$(EXT_SUFFIX))
+
+
+all: build
+
+build: $(EXTENSIONS)
+
+$(EXTENSIONS): $(EXT_SOURCES)
+	@cd .. && $(PYTHON) setup.py develop
+
+test: tests
+
+tests: build
+	@echo 'running tests'
+	@$(PYTHON) -m unittest discover -p '*_test.py'
+
+clean:
+	@cd .. && $(PYTHON) setup.py clean
+	@find .. -name '*.pyc' | xargs rm -v
+	@find .. -name '*.so' | xargs rm -v
+	@find .. -type d -name '__pycache__' | xargs rm -v -r
+	@find .. -type d -name '*.egg-info' | xargs rm -v -r
+
+fix:
+	@echo 'formatting code'
+	-@$(YAPF) --in-place --recursive --verify .

python/README.md

@@ -1,38 +1,43 @@
 This directory contains the code for the Python `brotli` module,
 `bro.py` tool, and roundtrip tests.
 
+### Installation
+
+If you just want to install the module from source, execute the
+following from the root project directory:
+
+    $ python setup.py install
 
 ### Development
 
-To build the module, execute the following from the root project
-directory:
+For development, reinstalling the module with every change is time
+consuming.  Instead, we recommend using the `setuptools`
+"[development mode][]" to make the module available while still being
+able to edit the source files.
 
-    $ python setup.py build
+We provide a `Makefile` to simplify common commands:
 
-To test the module, execute the following from the root project
-directory:
+    $ make          # Deploy the module in "development mode"
    
-    $ python setup.py test
+    $ make tests    # Test the module
 
+    $ make clean    # Remove all temporary files and build output
 
 ### Code Style
 
 Brotli's code follows the [Google Python Style Guide][].  To
-automatically format your code, install [YAPF][]:
+automatically format your code, first install [YAPF][]:
 
     $ pip install yapf
 
-Then, either format a single file:
+Then, to format all files in the project, you can run:
 
-    $ yapf --in-place FILE
-
-Or, format all files in a directory:
-
-    $ yapf --in-place --recursive DIR
+    $ make fix      # Automatically format code
 
 See the [YAPF usage][] documentation for more information.
 
 
+[development mode]: https://setuptools.readthedocs.io/en/latest/setuptools.html#development-mode
 [Google Python Style Guide]: https://google.github.io/styleguide/pyguide.html
 [YAPF]: https://github.com/google/yapf
 [YAPF usage]: https://github.com/google/yapf#usage