Use pyre site-package feature (#589)

* Use pyre site-package feature
* Update readme, remove example

.github/workflows/build.yml

@@ -77,19 +77,6 @@ jobs:
       if: steps.cache.outputs.cache-hit != 'true'
       run: |
         pip install --upgrade --upgrade-strategy eager build -r requirements.txt -r requirements-dev.txt
-    - name: Get Python site-packages
-      id: python-info
-      run: |
-        echo "::set-output name=SITE_PACKAGES::$(python -c 'import sysconfig; print(sysconfig.get_paths()["purelib"])')"
-    - name: Configure Pyre
-      id: pyre_template
-      uses: chuhlomin/render-template@v1.2
-      with:
-          template: .github/workflows/.pyre_configuration.template
-          vars: |
-            python_site_packages: ${{ steps.python-info.outputs.SITE_PACKAGES }}
-    - name: Write Pyre Config
-      run: echo '${{ steps.pyre_template.outputs.result }}' > .pyre_configuration
     - name: Make sure Pyre uses the working copy
       run: pip install -e .
     - run: pyre --version

.gitignore

@@ -15,6 +15,5 @@ build/
 libcst/_version.py
 .coverage
 .hypothesis/
-.pyre_configuration
 .python-version
 target/

.github/workflows/.pyre_configuration.template → .pyre_configuration

@@ -6,7 +6,7 @@
         "."
     ],
     "search_path": [
-        "stubs", "{{ .python_site_packages }}"
+        "stubs", {"site-package": "setuptools_rust"}
     ],
     "workers": 3,
     "strict": true

README.rst

@@ -175,23 +175,18 @@ for more examples of how to run tests.
 
 We use `Pyre <https://github.com/facebook/pyre-check>`_ for type-checking.
 
-To set up pyre check environment:
-
-1. Copy the example Pyre config: ``cp .pyre_configuration.example .pyre_configuration``.
-2. In the config file, add your venv site-packages dir to "search_path". (e.g. add "/workspace/libcst-env/lib/python3.7/site-packages")
-   Note: venv dir must **not** be inside the libcst dir
-3. Remove installed LibCST and install from the source code:
+To verify types for the library, do the following in the root:
 
 .. code-block:: shell
 
-    pip uninstall -y libcst
-    pip install -e .
+    pyre check
 
-To verify types for the library, do the following in the root:
+*Note*: You may need to remove installed LibCST and install from the source code prior to type checking:
 
 .. code-block:: shell
 
-    pyre check
+    pip uninstall -y libcst
+    pip install -e .
 
 To generate documents, do the following in the root: