Initial commit

.github/workflows/update.yml

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+name: Update Dependencies
+
+on:
+  # schedule:             # Sets a schedule to trigger the workflow
+  #   - cron: "0 8 * * *" # Every day at 08:00 AM UTC (see https://docs.github.com/en/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows#schedule)
+  workflow_dispatch:    # Allows the workflow to be triggered manually via the GitHub interface
+
+jobs:
+  check-for-updates: # Determines which updates to apply.
+    runs-on: ubuntu-latest
+    outputs:
+      is-update-available: ${{ steps.check-for-updates.outputs.is-update-available }}
+      new-tags: ${{ steps.check-for-updates.outputs.new-tags }}
+    steps:
+      - name: Run the action
+        id: check-for-updates
+        uses: leanprover-community/mathlib-update-action@v1
+        # START CONFIGURATION BLOCK 1
+        # END CONFIGURATION BLOCK 1
+  do-update: # Runs the upgrade, tests it, and makes a PR/issue/commit.
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write      # Grants permission to push changes to the repository
+      issues: write        # Grants permission to create or update issues
+      pull-requests: write # Grants permission to create or update pull requests
+    needs: check-for-updates
+    if: ${{ needs.check-for-updates.outputs.is-update-available == 'true' }}
+    strategy: # Runs for each update discovered by the `check-for-updates` job.
+      max-parallel: 1 # Ensures that the PRs/issues are created in order.
+      matrix:
+        tag: ${{ fromJSON(needs.check-for-updates.outputs.new-tags) }}
+    steps:
+      - name: Run the action
+        id: update-the-repo
+        uses: leanprover-community/mathlib-update-action/do-update@v1
+        with:
+          tag: ${{ matrix.tag }}
+          # START CONFIGURATION BLOCK 2
+          on_update_succeeds: pr # Create a pull request if the update succeeds
+          on_update_fails: issue # Create an issue if the update fails
+          # END CONFIGURATION BLOCK 2