Move project metadata from setup.py to pyproject.toml (keras-team#20427)

* Move project metadata from setup.py to pyproject.toml

* Override black target version (for now) to avoid other changes

* PR feedback

* Move explicit list of dependencies from setup.py to pyproject.toml

* pathlib was already imported

.github/workflows/actions.yml

@@ -44,7 +44,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: ${{ steps.pip-cache.outputs.dir }}
-          key: ${{ runner.os }}-pip-${{ hashFiles('setup.py') }}-${{ hashFiles('requirements.txt') }}
+          key: ${{ runner.os }}-pip-${{ hashFiles('pyproject.toml') }}-${{ hashFiles('requirements.txt') }}
       - name: Install dependencies
         run: |
           pip install -r requirements.txt --progress-bar off --upgrade
@@ -115,7 +115,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: ${{ steps.pip-cache.outputs.dir }}
-          key: ${{ runner.os }}-pip-${{ hashFiles('setup.py') }}-${{ hashFiles('requirements.txt') }}
+          key: ${{ runner.os }}-pip-${{ hashFiles('pyproject.toml') }}-${{ hashFiles('requirements.txt') }}
       - name: Install dependencies
         run: |
           pip install -r requirements.txt --progress-bar off --upgrade

.github/workflows/nightly.yml

@@ -35,7 +35,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: ${{ steps.pip-cache.outputs.dir }}
-          key: ${{ runner.os }}-pip-${{ hashFiles('setup.py') }}-${{ hashFiles('requirements.txt') }}
+          key: ${{ runner.os }}-pip-${{ hashFiles('pyproject.toml') }}-${{ hashFiles('requirements.txt') }}
       - name: Install dependencies
         run: |
           pip install -r requirements.txt --progress-bar off --upgrade
@@ -75,7 +75,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: ${{ steps.pip-cache.outputs.dir }}
-          key: ${{ runner.os }}-pip-${{ hashFiles('setup.py') }}-${{ hashFiles('requirements.txt') }}
+          key: ${{ runner.os }}-pip-${{ hashFiles('pyproject.toml') }}-${{ hashFiles('requirements.txt') }}
       - name: Install dependencies
         run: |
           pip install -r requirements.txt --progress-bar off --upgrade

pip_build.py

@@ -29,22 +29,20 @@
 package = "keras"
 build_directory = "tmp_build_dir"
 dist_directory = "dist"
-to_copy = ["setup.py", "README.md"]
+to_copy = ["pyproject.toml", "README.md"]
 
 
 def export_version_string(version, is_nightly=False, rc_index=None):
     """Export Version and Package Name."""
     if is_nightly:
         date = datetime.datetime.now()
-        version += f".dev{date.strftime('%Y%m%d%H')}"
-        # Replaces `name="keras"` string in `setup.py` with `keras-nightly`
-        with open("setup.py") as f:
-            setup_contents = f.read()
-        with open("setup.py", "w") as f:
-            setup_contents = setup_contents.replace(
-                'name="keras"', 'name="keras-nightly"'
-            )
-            f.write(setup_contents)
+        version += f".dev{date:%Y%m%d%H}"
+        # Update `name = "keras"` with "keras-nightly"
+        pyproj_pth = pathlib.Path("pyproject.toml")
+        pyproj_str = pyproj_pth.read_text().replace(
+            'name = "keras"', 'name = "keras-nightly"'
+        )
+        pyproj_pth.write_text(pyproj_str)
     elif rc_index is not None:
         version += "rc" + str(rc_index)
 

pyproject.toml

@@ -1,5 +1,55 @@
+[build-system]
+requires = ["setuptools >=61.0"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "keras"
+authors = [
+    {name = "Keras team", email = "[email protected]"},
+]
+description = "Multi-backend Keras"
+readme = "README.md"
+requires-python = ">=3.9"
+license = {text = "Apache License 2.0"}
+dynamic = ["version"]
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3 :: Only",
+    "Operating System :: Unix",
+    "Operating System :: MacOS",
+    "Intended Audience :: Science/Research",
+    "Topic :: Scientific/Engineering",
+    "Topic :: Software Development",
+]
+dependencies = [
+    "absl-py",
+    "numpy",
+    "rich",
+    "namex",
+    "h5py",
+    "optree",
+    "ml-dtypes",
+    "packaging",
+]
+# Run also: pip install -r requirements.txt
+
+[project.urls]
+Home = "https://keras.io/"
+Repository = "https://github.com/keras-team/keras"
+
+[tool.setuptools.dynamic]
+version = {attr = "keras.src.version.__version__"}
+
+[tool.setuptools.packages.find]
+include = ["keras", "keras.*"]
+
 [tool.black]
 line-length = 80
+target-version = []
 
 # black needs this to be a regex
 # to add more exclude expressions