Refactor update_backend.yml workflow (#562)

* Moves backend update code to python script

* Account for move from pysr/version.py to pyproject.toml

* Remove need for installing pysr during backend update

---------

Co-authored-by: MilesCranmer <miles.cranmer@gmail.com>

.github/workflows/update_backend.yml

@@ -10,16 +10,13 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.9
+          python-version: 3.12
           cache: pip
 
-      - name: "Install PySR"
+      - name: "Install dependencies"
         run: |
           python -m pip install --upgrade pip
-          pip install -r requirements.txt
-          python setup.py install
-          # Not needed:
-          # python -c 'import pysr; pysr.install()'
+          pip install tomlkit
 
       - name: "Get SymbolicRegression.jl latest version"
         id: get-latest
@@ -27,32 +24,20 @@ jobs:
           cd $(mktemp -d)
           git clone https://github.com/MilesCranmer/SymbolicRegression.jl
           cd SymbolicRegression.jl
-          echo "version=$(git describe --tags --abbrev=0 | sed 's/^v//')" >> $GITHUB_OUTPUT
+          echo "version=$(git describe --tags --match='v*' --abbrev=0 | sed 's/^v//')" >> $GITHUB_OUTPUT
 
-      - name: "Get SymbolicRegression.jl version used in PySR"
-        id: get-current
+      - name: "Update SymbolicRegression.jl version in PySR"
         run: |
-          echo "version=$(python -c 'import pysr; print(pysr.version.__symbolic_regression_jl_version__)' 2>/dev/null)" >> $GITHUB_OUTPUT
+          python .github/workflows/update_backend_version.py ${{ steps.get-latest.outputs.version }}
 
-      # If versions are different, we want to take our checked-out version,
-      # create a new branch called "update_compat_{...}", where the "..."
-      # is a timestamp. We then want to
-      # go to pysr/version.py, bump the patch version of PySR (__version__),
-      # set the version of __symbolic_regression_jl_version__ to the latest
-      # version of SymbolicRegression.jl, and then commit and push.
-      # Finally, we will open a PR from this branch to master.
-      - name: "Update versions"
-        if: ${{ steps.get-latest.outputs.version != steps.get-current.outputs.version }}
+      - name: "Restore changes if no diff to `pysr/juliapkg.json`"
         run: |
-          # Bump PySR patch number:
-          CURRENT_PYSR_PATCH_VERSION=$(python -c 'import pysr; print(pysr.version.__version__.split(".")[-1], end="")' 2>/dev/null)
-          NEW_PYSR_PATCH_VERSION=$((CURRENT_PYSR_PATCH_VERSION + 1))
-          sed -i "s/^__version__ = .*/__version__ = \"$(python -c 'import pysr; print(".".join(pysr.version.__version__.split(".")[:-1]), end="")' 2>/dev/null).${NEW_PYSR_PATCH_VERSION}\"/" pysr/version.py
+          if git diff --quiet pysr/juliapkg.json; then
+            echo "No changes to pysr/juliapkg.json. Restoring changes."
+            git restore pyproject.toml
+          fi
 
-          # Set SymbolicRegression.jl version:
-          sed -i "s/^__symbolic_regression_jl_version__ = .*/__symbolic_regression_jl_version__ = \"${{ steps.get-latest.outputs.version }}\"/" pysr/version.py
-
-      - name: "Create PR"
+      - name: "Create PR if necessary"
         uses: peter-evans/create-pull-request@v6
         with:
           token: ${{ secrets.REPO_SCOPED_TOKEN }}
@@ -63,4 +48,6 @@ jobs:
             It updates the backend version to v${{ steps.get-latest.outputs.version }}. For a full description of the changes, see the backend changelog: [v${{ steps.get-latest.outputs.version }}](https://github.com/MilesCranmer/SymbolicRegression.jl/releases/tag/v${{ steps.get-latest.outputs.version }}).
           delete-branch: true
           commit-message: "Update backend version to v${{ steps.get-latest.outputs.version }}"
-          add-paths: pysr/version.py
+          add-paths: |
+            pyproject.toml
+            pysr/juliapkg.json

.github/workflows/update_backend_version.py

@@ -0,0 +1,29 @@
+import json
+import sys
+from pathlib import Path
+
+import tomlkit
+
+new_backend_version = sys.argv[1]
+
+assert not new_backend_version.startswith("v"), "Version should not start with 'v'"
+
+pyproject_toml = Path(__file__).parent / ".." / ".." / "pyproject.toml"
+juliapkg_json = Path(__file__).parent / ".." / ".." / "pysr" / "juliapkg.json"
+
+with open(pyproject_toml) as toml_file:
+    pyproject_data = tomlkit.parse(toml_file.read())
+
+with open(juliapkg_json) as f:
+    juliapkg_data = json.load(f)
+
+major, minor, patch, *dev = pyproject_data["project"]["version"].split(".")
+pyproject_data["project"]["version"] = f"{major}.{minor}.{int(patch)+1}"
+
+juliapkg_data["packages"]["SymbolicRegression"]["version"] = f"={new_backend_version}"
+
+with open(pyproject_toml, "w") as toml_file:
+    toml_file.write(tomlkit.dumps(pyproject_data))
+
+with open(juliapkg_json, "w") as f:
+    json.dump(juliapkg_data, f, indent=4)