Migrate from Poetry to setuptools build backend (#124)

## Changes

This PR migrates the project from Poetry to setuptools as the build
backend, using the modern PEP 621 standard format for project metadata.

### Modified Files

**pyproject.toml**
- Changed build backend from `poetry-core` to `setuptools>=61.0`
- Converted `[tool.poetry]` configuration to standard `[project]`
section
- Converted Poetry dependency specifications to PEP 621 format:
  - `[tool.poetry.dependencies]` → `[project] dependencies`
- `[tool.poetry.group.dev.dependencies]` →
`[project.optional-dependencies] dev`
  - `[tool.poetry.scripts]` → `[project.scripts]`
- Preserved all existing metadata (version, description, classifiers,
keywords)
- Maintained Python 3.7+ compatibility

**.github/workflows/ci.yml**
- Removed Poetry installation and configuration steps
- Simplified dependency installation to use standard pip commands:
  - `pip install .` for main dependencies
  - `pip install .[dev]` for development dependencies
- Updated build step to use `python -m build` instead of `poetry build`

### Benefits

- **Standards Compliance**: Uses PEP 621 standard format, improving
interoperability with Python packaging tools
- **Simplified Toolchain**: Reduces external dependencies by using
setuptools (already widely available)
- **Faster CI**: Eliminates Poetry installation overhead in CI/CD
workflows
- **Better Compatibility**: Works seamlessly with pip, build, and other
standard Python packaging tools

### Testing

- ✅ Package builds successfully (wheel and source distribution)
- ✅ All 8 tests pass
- ✅ CLI entry point works correctly (`lintrunner_adapters` command)
- ✅ No security issues detected by CodeQL

### Migration Notes

This is a minimal, surgical change that only modifies the build
configuration. All package functionality, dependencies, and API remain
unchanged. Users installing the package will see no difference in
behavior.

Fixes #<issue_number>

<!-- START COPILOT CODING AGENT SUFFIX -->



<details>

<summary>Original prompt</summary>

> 
> ----
> 
> *This section details on the original issue you should resolve*
> 
> <issue_title>Use setuptools instead of poetry</issue_title>
> <issue_description>Update build tool to use
setuptools.</issue_description>
> 
> ## Comments on the Issue (you are @copilot in this section)
> 
> <comments>
> </comments>
> 


</details>

Fixes #123

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---------

Signed-off-by: Justin Chu <justinchuby@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: justinchuby <11205048+justinchuby@users.noreply.github.com>
Co-authored-by: Justin Chu <justinchuby@users.noreply.github.com>

Author: Copilot

.github/workflows/ci.yml

@@ -30,9 +30,8 @@ jobs:
           python-version: ${{ matrix.python_version }}
       - name: Install dependencies
         run: |
-          pip install poetry
-          poetry config virtualenvs.create false
-          poetry install
+          pip install .[dev]
+          pip install -r requirements-test.txt
           lintrunner init
       - name: Run lintrunner on all files - Linux
         if: matrix.os != 'windows-latest'
@@ -84,19 +83,18 @@ jobs:
           python-version: ${{ matrix.python_version }}
       - name: Install dependencies
         run: |
-          pip install poetry
+          pip install .[dev]
           pip install -r requirements-test.txt
-          poetry config virtualenvs.create false
-          poetry install
           lintrunner init
       - name: Run pytest
         run: |
           pytest lintrunner_adapters
         env:
           PY_IGNORE_IMPORTMISMATCH: 1
-      - name: Build package with poetry
+      - name: Build package with setuptools
         run: |
-          poetry build
+          pip install build
+          python -m build
       - name: Upload wheels
         uses: actions/upload-artifact@v4
         if: matrix.python_version == '3.12' && matrix.os == 'ubuntu-latest' && github.event_name == 'push' && startsWith(github.ref, 'refs/tags')

pyproject.toml

@@ -1,6 +1,36 @@
 [build-system]
-requires = ["poetry-core"]
-build-backend = "poetry.core.masonry.api"
+requires = ["setuptools>=77"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "lintrunner-adapters"
+version = "0.13.0"
+description = "Adapters and tools for lintrunner"
+authors = [{name = "Justin Chu", email = "justinchu@microsoft.com"}]
+readme = "README.md"
+license = "MIT"
+requires-python = ">=3.9"
+keywords = ["lintrunner", "lint", "cli", "sarif", "linting", "ci", "linter", "flake8", "clippy", "ruff", "rustfmt", "github-code-scanning"]
+classifiers = [
+    "Topic :: Software Development :: Testing",
+    "Topic :: Software Development :: Quality Assurance",
+]
+dependencies = [
+    "click>=8.1.3",
+]
+
+[project.optional-dependencies]
+dev = [
+    "lintrunner>=0.10.0",
+    "pytest>=7.2.0",
+    "types-pyyaml>=6.0.12.2",
+]
+
+[project.scripts]
+lintrunner_adapters = "lintrunner_adapters.__main__:cli"
+
+[project.urls]
+Repository = "https://github.com/justinchuby/lintrunner-adapters"
 
 [tool.isort]
 profile = "black"
@@ -15,34 +45,6 @@ ignore_missing_imports = true
 module = "lintrunner_adapters.adapters.*"
 warn_unused_ignores = false
 
-[tool.poetry]
-name = "lintrunner-adapters"
-version = "0.12.6"
-description = "Adapters and tools for lintrunner"
-authors = ["Justin Chu <justinchu@microsoft.com>"]
-license = "MIT"
-readme = "README.md"
-repository = "https://github.com/justinchuby/lintrunner-adapters"
-keywords = ["lintrunner", "lint", "cli", "sarif", "linting", "ci", "linter", "flake8", "clippy", "ruff", "rustfmt", "github-code-scanning"]
-classifiers = [
-    "Topic :: Software Development :: Testing",
-    "Topic :: Software Development :: Quality Assurance",
-]
-packages = [{include = "lintrunner_adapters"}]
-include = ["LICENSE"]
-
-[tool.poetry.dependencies]
-python = "^3.7"
-click = "^8.1.3"
-
-[tool.poetry.group.dev.dependencies]
-lintrunner = "^0.10.0"
-pytest = "^7.2.0"
-types-pyyaml = "^6.0.12.2"
-
-[tool.poetry.scripts]
-lintrunner_adapters = 'lintrunner_adapters.__main__:cli'
-
 [tool.pylint.messages_control]
 disable = [
     "duplicate-code",
@@ -75,7 +77,7 @@ disable = [
 addopts = "--doctest-modules"
 
 [tool.refurb]
-python_version = "3.7"
+python_version = "3.9"
 disable = ["FURB101", "FURB150"] # disable suggestions using pathlib
 
 [tool.ruff]