Fix PyPI publishing by modernizing package configuration

This commit updates our package configuration to use modern Python packaging tools:
- Moves build configuration to pyproject.toml using hatchling as the build backend
- Updates metadata version to properly handle license-file
- Converts setup.py to a custom build hook for dynamic dependency handling
- Maintains existing functionality while using modern packaging standards

Fixes #596

pyproject.toml

@@ -1,6 +1,37 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "mentat"
+dynamic = ["version"]
+description = "AI coding assistant on your command line"
+readme = "README.md"
+license = { file = "LICENSE" }
+requires-python = ">=3.10"
+authors = [
+    { name = "Abante AI", email = "[email protected]" },
+]
+dependencies = [
+    # We'll dynamically read these from requirements.txt in the [tool.hatch.build.targets.wheel] section
+]
+
+[tool.hatch.version]
+path = "mentat/VERSION"
+
+[tool.hatch.build.targets.wheel]
+packages = ["mentat", "benchmarks"]
+
+[tool.hatch.build.targets.wheel.hooks.custom]
+path = "setup.py"
+
+[project.scripts]
+mentat = "mentat.terminal.client:run_cli"
+mentat-server = "mentat.server.mentat_server:main"
+mentat-daemon = "mentat.daemon:main"
+
 [tool.ruff]
 line-length = 120
 
 [tool.pytest.ini_options]
 addopts = "--ignore=vscode/bundled --ignore=benchmarks/benchmark_repos --ignore=testbed/exercism-python"
-

setup.py

@@ -2,44 +2,18 @@
 from pathlib import Path
 
 import pkg_resources
-from setuptools import find_packages, setup
 
-readme_path = os.path.join(Path(__file__).parent, "README.md")
-with open(readme_path, "r", encoding="utf-8") as f:
-    long_description = f.read()
 
+def read_requirements(filename):
+    """Read requirements from a file and return as a list of strings."""
+    with open(os.path.join(os.path.dirname(__file__), filename)) as f:
+        return [str(r) for r in pkg_resources.parse_requirements(f)]
 
-version_path = os.path.join(Path(__file__).parent, "mentat/VERSION")
-with open(version_path, "r", encoding="utf-8") as f:
-    VERSION = f.read().strip()
 
-setup(
-    name="mentat",
-    version=VERSION,
-    python_requires=">=3.10",
-    packages=find_packages(include=["mentat", "mentat.*", "benchmarks", "benchmarks.*"]),
-    install_requires=[
-        str(r)
-        for r in pkg_resources.parse_requirements(open(os.path.join(os.path.dirname(__file__), "requirements.txt")))
-    ],
-    entry_points={
-        "console_scripts": [
-            "mentat=mentat.terminal.client:run_cli",
-            "mentat-server=mentat.server.mentat_server:main",
-            "mentat-daemon=mentat.daemon:main",
-        ],
-    },
-    description="AI coding assistant on your command line",
-    long_description=long_description,
-    long_description_content_type="text/markdown",
-    license="Apache-2.0",
-    include_package_data=True,
-    extras_require={
-        "dev": [
-            str(r)
-            for r in pkg_resources.parse_requirements(
-                open(os.path.join(os.path.dirname(__file__), "dev-requirements.txt"))
-            )
-        ],
-    },
-)
+def hook(version, build_data):
+    """Custom build hook for hatchling to set dynamic dependencies."""
+    build_data["dependencies"] = read_requirements("requirements.txt")
+    build_data["optional-dependencies"] = {
+        "dev": read_requirements("dev-requirements.txt")
+    }
+    return build_data