Update nightly PyPI workflow to improve version computation (#99)

Summary:
- Refactor version computation logic to ensure it fails gracefully if no tags are found, providing a clear error message.
- Change the nightly version format to use the next patch version based on the latest tag, appending a timestamp for uniqueness.
- Ensure build tools are installed before the build step.

These changes fixes the bug that the nightly version is older than stable version, and enhance the reliability and clarity of the nightly build process.

Pull Request resolved: #99

Reviewed By: sfzhu93

Differential Revision: D82224384

Pulled By: FindHao

fbshipit-source-id: 6bfd2f447e3be585da9047e46ce1de01163cca48

Author: FindHao

.github/workflows/nightly-pypi.yml

@@ -23,23 +23,32 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: "3.11"
-
-      - name: Install build tools
-        run: |
-          python -m pip install --upgrade pip
-          pip install build setuptools-scm
-
-      - name: Compute nightly version from latest tag (per-second)
+      - name: Compute nightly version from latest tag (next patch + timestamp)
         id: ver
         if: github.ref_type != 'tag'
         run: |
-          TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo 0.1.0)
+          # Get latest tag; allow 'v' prefix; fail if none
+          if ! TAG=$(git describe --tags --abbrev=0 2>/dev/null); then
+            echo "::error title=No git tag found::Repository has no tags. Add a semver tag like v0.1.0"
+            exit 1
+          fi
           BASE=${TAG#v}
+          # Keep only X.Y.Z form (strip rc/a/b/post/dev suffixes)
+          BASE=$(printf "%s\n" "$BASE" | sed -E 's/^([0-9]+)\.([0-9]+)\.([0-9]+).*/\1.\2.\3/')
+          IFS='.' read -r MAJ MIN PAT <<EOF
+          $BASE
+          EOF
+          # Use next patch version as the nightly base
+          PAT=$((PAT + 1))
+          NEXT="$MAJ.$MIN.$PAT"
           DATE=$(date -u +%Y%m%d%H%M%S)
-          echo "NVER=${BASE}.dev${DATE}" >> $GITHUB_OUTPUT
+          echo "NVER=${NEXT}.dev${DATE}" >> "$GITHUB_OUTPUT"
+          echo "Computed nightly version: ${NEXT}.dev${DATE}"
 
       - name: Build sdist/wheel
         run: |
+          python -m pip install --upgrade pip
+          pip install build setuptools-scm
           if [ "${{ github.ref_type }}" != "tag" ]; then
             export SETUPTOOLS_SCM_PRETEND_VERSION=${{ steps.ver.outputs.NVER }}
           fi