build: add a workflow to automatically open release PRs

.github/workflows/bump-version.yaml

@@ -0,0 +1,86 @@
+on: push
+name: Open a PR to bump the version
+jobs:
+  open_pr:
+    strategy:
+      matrix:
+        component: ["server", "client"]
+    name: Open PR
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: x86_64-unknown-linux-gnu
+      - uses: actions/checkout@v4
+
+      - uses: swatinem/rust-cache@v2
+      - run: cargo install git-cliff@^2.2 cargo-edit@^0.12
+
+      - name: determine version
+        run: |
+          echo "COMPONENT=${{ matrix.component }}" | tee "$GITHUB_ENV"
+
+          comp_dir="mm-${{ matrix.component }}"
+          echo "COMPONENT_DIR=$comp_dir" | tee "$GITHUB_ENV"
+
+          version=$( git cliff -c .github/workflows/cliff.toml \
+            --bumped-version --unreleased \
+            --tag-pattern "${{ matrix.component }}" \
+            --include-path "$comp_dir/**/*" )
+          echo "BUMPED_VERSION=$version" | tee "$GITHUB_ENV"
+          echo "BUMPED_VERSION_SHORT=$( echo $version | sed -E 's/^[a-z]+-v(.*)/\1/' )" | tee "$GITHUB_ENV"
+
+      - name: replace version in files
+        if: ${{ env.BUMPED_VERSION != '' }}
+        run: git ls-files | xargs sed -i -E 's/mmserver-v[0-9]+\.[0-9]+\.[0-9]+/mmserver-v0.2.0/'
+
+      - name: replace version in Cargo.toml
+        if: ${{ env.BUMPED_VERSION != '' }}
+        run: (cd $COMPONENT_DIR && cargo set-version --offline $BUMPED_VERSION_SHORT)
+
+      - name: update BUSL change date
+        if: ${{ env.BUMPED_VERSION != '' && matrix.component == 'server' }}
+        run: |
+          change_date=$(date -d "4 years hence" +%Y-%m-01) # Round down to the 1st of the month
+          sed -i -E "/Change/s/[0-9]{4}-[0-9]{2}-[0-9]{2}/$change_date" LICENSES/BUSL-1.1.txt
+
+      - name: update CHANGELOG.md
+        if: ${{ env.BUMPED_VERSION != '' }}
+        run: |
+          git cliff -c .github/workflows/cliff.toml \
+            --include-path "$COMPONENT_DIR/**/*" \
+            --tag-pattern "$COMPONENT" \
+            -t "$BUMPED_VERSION" -u \
+            -p CHANGELOG.md
+
+      - name: generate PR body
+        if: ${{ env.BUMPED_VERSION != '' }}
+        run: |
+          git cliff -c .github/workflows/cliff.toml \
+            --include-path "$COMPONENT_DIR/**/*" \
+            --tag-pattern "$COMPONENT" \
+            -t "$BUMPED_VERSION" -u > "$RUNNER_TEMP/pr-body.txt"
+
+      - name: open PR
+        if: ${{ env.BUMPED_VERSION != '' }}
+        id: cpr
+        uses: peter-evans/create-pull-request@6d6857d36972b65feb161a90e484f2984215f83e
+        with:
+          draft: true
+          branch: "auto-bump-${{ matrix.component }}"
+          commit: "chore: bump mm${{ matrix.component }} to ${{ env.BUMPED_VERSION }}"
+          body-path: "${{ env.RUNNER_TEMP }}/pr-body.txt"
+
+      - name: tag branch commit
+        if: ${{ steps.cpr.outputs.pull-request-head-sha }}
+        run: |
+          git tag --force "$BUMPED_VERSION" ${{ steps.cpr.outputs.pull-request-head-sha }}
+          git push --tags --force
+
+
+
+
+
+

.github/workflows/cliff.toml

@@ -33,3 +33,7 @@ commit_parsers = [
   { body = ".*security", skip = true },
   { message = "^revert", skip = true },
 ]
+
+[bump]
+features_always_bump_minor = true
+breaking_always_bump_major = false