🔧 MAINTAIN: Move to flit for PEP 621 package builds (#608)

* MAINT: Move to using flit for build system

* migrate from python setup.py to pip install

* TST: Update conda workflows for testing

* python=3.9,osx seems to need chardet installed

* add ignore on util tests

* fix README conflict

* move publish to conda_ci as future

* update developer install to flit

* remove setup.py

* remove editable mode for pip install with pyproject.toml, migrate numba fix

* remove unecessary dependencies

.github/workflows/conda_ci.yml

@@ -41,8 +41,8 @@ jobs:
     - name: Setup QuantEcon
       shell: bash -l {0}
       run: |
-        conda activate test
-        python setup.py build
+        pip install -U pip
+        pip install .[testing]
 
     - name: flake8 Tests
       shell: bash -l {0}
@@ -61,3 +61,26 @@ jobs:
       with:
         github-token: ${{ secrets.GITHUB_TOKEN }}
         path-to-lcov: coverage.lcov
+
+  publish:
+
+    name: Publish to PyPi
+    needs: [tests]
+    if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v3
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v3
+        with:
+          python-version: 3.8
+      - name: Install flit
+        run: |
+          pip install flit~=3.6
+      - name: Build and publish
+        run: |
+          flit publish
+        env:
+          FLIT_USERNAME: __token__
+          FLIT_PASSWORD: ${{ secrets.PYPI_TOKEN }}

.github/workflows/test.yml

@@ -23,15 +23,15 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
 
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install -U numpy scipy pandas numba sympy ipython flake8 pytest coverage
-        python setup.py install
+        pip install flit~=3.6
+        pip install .[testing]
 
     - name: flake8 Tests
       run: |

README.md

@@ -52,6 +52,7 @@ An alternative is to download the sourcecode of the `quantecon` package and in
 
 Once you have downloaded the source files then the package can be installed by running
 
-    python setup.py install
+    pip install flit
+    flit install
 
 (To learn the basics about setting up Git see [this link](https://help.github.com/articles/set-up-git/).)

environment.yml

@@ -12,4 +12,6 @@ dependencies:
   - ipython
   - flake8
   - requests
+  - flit
+  - chardet # python>3.9,osx
   - pytest

pyproject.toml

@@ -0,0 +1,70 @@
+[build-system]
+requires = ["flit_core >=3.5,<4"]
+build-backend = "flit_core.buildapi"
+
+[project]
+name = "quantecon"
+authors = [{name = "QuantEcon Project", email = "admin@quantecon.org"}]
+classifiers = [
+    'Development Status :: 4 - Beta',
+    'Operating System :: OS Independent',
+    'Intended Audience :: Science/Research',
+    'Programming Language :: Python',
+    'Programming Language :: Python :: 3',
+    'Programming Language :: Python :: 3.5',
+    'Topic :: Scientific/Engineering',
+]
+keywords = [
+    'quantitative', 
+    'economics'
+]
+dynamic = ["description", "version"]
+requires-python = ">=3.7"
+dependencies = [
+    'numba',
+    'numpy',
+    'requests',
+    'scipy>=1.0.0',
+    'sympy',
+]
+
+[project.optional-dependencies]
+testing = [
+    "pytest",
+    "coverage",
+    "flake8",
+    "numpy",
+    "scipy",
+    "pandas",
+    "numba",
+    "sympy",
+]
+
+
+[project.license]
+file = "LICENSE"
+
+[project.readme]
+file = "README.md"
+content-type = "text/markdown"
+
+[project.urls]
+Homepage = "https://quantecon.org/quantecon-py/"
+Documentation = "http://quanteconpy.readthedocs.org/en/latest/"
+Funding = "https://quantecon.org"
+Source = "https://github.com/quantecon/QuantEcon.py"
+Tracker = "https://github.com/quantecon/QuantEcon.py/issues"
+
+[tool.flit.module]
+name = "quantecon"
+
+[tool.flit.sdist]
+exclude = [
+  ".*",  # Any hidden folders or files
+  "docs/",
+  "quantecon/tests/",
+  "quantecon/util/tests",
+  "Makefile",
+  "environment.yml",
+  "readthedocs.yml",
+]

quantecon/__init__.py

@@ -3,15 +3,15 @@
 Import the main names to top level.
 """
 
+__version__ = '0.5.2'
+
 try:
 	import numba
 except:
 	raise ImportError(
 		"Cannot import numba from current anaconda distribution. \
 			Please run `conda install numba` to install the latest version.")
 
-__version__ = '0.5.2'
-
 #-Modules-#
 from . import distributions
 from . import game_theory