Build and upload weekly nightly wheels (#146)

Author: crusaderky

.github/workflows/cibuildwheel.yml

@@ -5,6 +5,8 @@ on:
     branches: [main]
   pull_request:
     branches: ["*"]
+  schedule:  # runs on last commit on main branch
+    - cron: "0 1 * * 1"  # every Monday at 1AM, for weekly wheels
   workflow_dispatch: # allows you to trigger manually
 
 # When this workflow is queued, automatically cancel any previous running
@@ -14,8 +16,39 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
+  maybe_skip_scheduled:
+    name: Determine whether to skip scheduled run
+    runs-on: ubuntu-latest
+    outputs:
+      skip: ${{ env.skip }}
+    steps:
+      - name: On explosion main, skip scheduled run if no changes in last week
+        if: github.event_name == 'schedule' && github.repository_owner == 'explosion'
+        run: |
+          LAST_COMMIT_TIME=$(git log -1 --format=%ct)
+          CURRENT_TIME=$(date +%s)
+          TIME_DIFF=$((CURRENT_TIME - LAST_COMMIT_TIME))
+          echo "Time since last commit: $TIME_DIFF seconds"
+          if [ $TIME_DIFF -gt 604800 ]; then
+            echo "No changes in the last week. Skipping build."
+            echo "skip=true" >> $GITHUB_ENV
+          else
+            echo "Changes detected in the last week. Proceeding with build."
+            echo "skip=false" >> $GITHUB_ENV
+          fi
+
+      - name: Always skip scheduled runs on forks
+        if: github.event_name == 'schedule' && github.repository_owner != 'explosion'
+        run: echo "skip=true" >> $GITHUB_ENV
+
+      - name: Never skip non-scheduled runs
+        if: github.event_name != 'schedule'
+        run: echo "skip=false" >> $GITHUB_ENV
+
   build_wheels:
     name: Build wheels on ${{ matrix.os }}
+    needs: maybe_skip_scheduled
+    if: needs.maybe_skip_scheduled.outputs.skip == 'false'
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: true        
@@ -84,6 +117,8 @@ jobs:
 
   build_sdist:
     name: Build source distribution
+    needs: maybe_skip_scheduled
+    if: needs.maybe_skip_scheduled.outputs.skip == 'false'
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
@@ -97,7 +132,8 @@ jobs:
           path: dist/*.tar.gz
 
   create_release:
-    needs: [build_wheels, build_sdist]
+    needs: [maybe_skip_scheduled, build_wheels, build_sdist]
+    if: needs.maybe_skip_scheduled.outputs.skip == 'false'
     runs-on: ubuntu-latest
     permissions:
       contents: write
@@ -133,15 +169,25 @@ jobs:
           pattern: cibw-*
           path: dist
           merge-multiple: true
-      
+
+      - name: List dist directory
+        run: ls -l dist
+
       - name: Create Draft Release
         id: create_release
         uses: softprops/action-gh-release@v2
-        if: startsWith(github.ref, 'refs/tags/release-') || startsWith(github.ref, 'refs/tags/prerelease-')
+        if: (startsWith(github.ref, 'refs/tags/release-') || startsWith(github.ref, 'refs/tags/prerelease-')) && github.event_name != 'schedule' && github.repository_owner == 'explosion'
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           name: ${{ env.TAG_NAME }}
           draft: true
           prerelease: ${{ env.IS_PRERELEASE }}
           files: "./dist/*" 
+
+      - name: Upload nightly wheels
+        if: (github.event_name == 'schedule' || github.event_name == 'workflow_dispatch') && github.repository_owner == 'explosion' && github.ref == 'refs/heads/main'
+        uses: scientific-python/upload-nightly-action@b36e8c0c10dbcfd2e05bf95f17ef8c14fd708dbf # 0.6.2
+        with:
+          artifacts_path: dist
+          anaconda_nightly_upload_token: ${{ secrets.ANACONDA_ORG_UPLOAD_TOKEN }}