update to versioned branch

.github/workflows/update-semconv-integration-branch.yml

@@ -13,12 +13,50 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: integration/semantic-conventions
-          # this is needed in order to do rebase below
+          # this is needed in order to do the rebase belo
           fetch-depth: 0
-          # this is needed in order to trigger workflows on the PR
+          # this is needed in order to trigger workflows when pushing new commits to the PR
           token: ${{ secrets.OPENTELEMETRYBOT_GITHUB_TOKEN }}
 
+      - name: Look for an existing branch
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          version=$(git branch -r \
+                        | grep '^ *origin/opentelemetrybot/semantic-conventions-v[0-9]+\.[0-9]+\.[0-9]+$' \
+                        | sed 's/ *origin\/opentelemetrybot\/semantic-conventions-//')
+
+          if [[ -z "$versions" ]]; then
+            latest_version=$(gh release view \
+                          --repo open-telemetry/semantic-conventions \
+                          --json tagName \
+                          --jq .tagName)
+            if [[ $latest_version =~ ^v([0-9]+)\.([0-9]+)\.[0-9]+ ]]; then
+              major="${BASH_REMATCH[1]}"
+              minor="${BASH_REMATCH[2]}"
+              version="v$major.$((minor + 1)).0"
+            else
+              echo "unexpected version: $latest_version"
+              exit 1
+            fi
+          fi
+
+          echo "VERSION=$version" >> $GITHUB_ENV
+          echo "BRANCH=opentelemetrybot/semantic-conventions-${version}" >> $GITHUB_ENV
+
+      - name: Create or checkout branch if needed
+        run: |
+          if ! git ls-remote --exit-code --heads origin $BRANCH; then
+            echo here1
+            git checkout -b $BRANCH origin/main
+            echo here2
+            git push -u origin $BRANCH
+            echo here3
+          else
+            echo here4
+            git checkout $BRANCH
+          fi
+
       - name: Use CLA approved github bot
         run: |
           git config user.name opentelemetrybot
@@ -30,13 +68,34 @@ jobs:
           git fetch origin
           git merge origin/main
           if [ "$(git rev-parse HEAD)" != "$previous" ]; then
-            git push origin integration/semantic-conventions
+            git push
           fi
 
       - name: Update submodule
         run: |
-          git submodule update --init --remote content-modules/semantic-conventions
+          git submodule update --init content-modules/semantic-conventions
+          cd content-modules/semantic-conventions
+
+          if git ls-remote --exit-code --tags origin $VERSION; then
+            git reset --hard $VERSION
+          else
+            git reset --hard origin/main
+          fi
+
+          cd ../..
+
           if ! git diff-index --quiet HEAD; then
             git commit -am "Update submodule"
-            git push origin integration/semantic-conventions
+            git push
+          fi
+
+      - name: Create pull request if needed
+        env:
+          # not using secrets.GITHUB_TOKEN since pull requests from that token do not run workflows
+          GH_TOKEN: ${{ secrets.OPENTELEMETRYBOT_GITHUB_TOKEN }}
+        run: |
+          prs=$(gh pr list --state open --head $BRANCH)
+          if [ -z "$prs" ]; then
+            gh pr create --title "Update semantic conventions to ${VERSION}" \
+                         --body "This PR updates the semantic conventions to ${VERSION}."
           fi