chore: prepare release workflow for codegen 3.0 adjustments

.github/workflows/prepare-release-3.yml

@@ -33,8 +33,18 @@ permissions:
   pull-requests: write
 
 jobs:
+  validate-branch:
+    if: github.ref_name != '3.0.0'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Require 3.0.0 branch
+        run: |
+          echo "This workflow can run only from branch 3.0.0 (current: ${GITHUB_REF_NAME})."
+          exit 1
+
   prepare:
     # Resolves release versions, applies file updates, validates build, then opens PR.
+    if: github.ref_name == '3.0.0'
     runs-on: ubuntu-latest
     env:
       CODEGEN_VERSION: ${{ inputs.codegen_version }}
@@ -85,6 +95,17 @@ jobs:
         # Performs version bump to release and updates docs/poms/openapi.
         run: bash CI/release/prepare-codegen-release.sh
 
+      - name: Create or update draft GitHub release
+        uses: ncipollo/release-action@v1
+        with:
+          allowUpdates: true
+          bodyFile: ${{ steps.prepare-release.outputs.release_notes_file }}
+          commit: 3.0.0
+          draft: true
+          name: v${{ steps.prepare-release.outputs.codegen_version }}
+          tag: v${{ steps.prepare-release.outputs.codegen_version }}
+          token: ${{ steps.generate-token.outputs.token }}
+
       - name: Build release candidate
         # Build with the resolved generators version to catch dependency issues early.
         run: |

CI/release/prepare-codegen-release.sh

@@ -13,6 +13,8 @@ previous_generators_version="${PREVIOUS_GENERATORS_VERSION:-}"
 build_generators_version=""
 
 # Prepare flow must start from a SNAPSHOT on branch 3.0.0.
+current_branch="$(git rev-parse --abbrev-ref HEAD)"
+[[ "${current_branch}" == "3.0.0" ]] || fail "Prepare release can run only on branch 3.0.0, got ${current_branch}"
 current_version="$(maven_project_version)"
 [[ "${current_version}" =~ SNAPSHOT$ ]] || fail "Prepare release must start from a SNAPSHOT codegen version, got ${current_version}"
 
@@ -76,9 +78,10 @@ mvn -B versions:set -DnewVersion="${codegen_version}"
 mvn -B versions:commit
 
 # Generate a minimal release-notes draft aligned with current GitHub release style.
-mkdir -p docs/release-notes
+release_notes_dir="${RUNNER_TEMP:-/tmp}/swagger-codegen-release-drafts"
+mkdir -p "${release_notes_dir}"
 previous_tag="$(git tag --merged HEAD --list 'v3.*' | sort -V | tail -n 1 || true)"
-release_notes_file="docs/release-notes/v${codegen_version}.md"
+release_notes_file="${release_notes_dir}/v${codegen_version}.md"
 {
   echo "# Swagger Codegen v${codegen_version}"
   echo
@@ -98,6 +101,10 @@ release_notes_file="docs/release-notes/v${codegen_version}.md"
   fi
 } > "${release_notes_file}"
 
+if [[ -n "${GITHUB_OUTPUT:-}" ]]; then
+  echo "release_notes_file=${release_notes_file}" >> "${GITHUB_OUTPUT}"
+fi
+
 update_codegen_release_files_script="CI/release/update-codegen-release-files.py"
 [[ -f "${update_codegen_release_files_script}" ]] || fail "Missing ${update_codegen_release_files_script}"
 

CI/release/update-codegen-release-files.py

@@ -66,6 +66,22 @@ def update_generators_poms(generators_version: str) -> None:
     replace_text("pom.docker.xml", replacements)
 
 
+def update_sample_meta_codegen_pom(codegen_version: str) -> None:
+    # Keep sample project pinned to the codegen version being prepared.
+    replace_text(
+        "samples/meta-codegen/pom.xml",
+        [(r"<swagger-codegen-version>[^<]+</swagger-codegen-version>", f"<swagger-codegen-version>{codegen_version}</swagger-codegen-version>")],
+    )
+
+
+def update_docker_pom_version(codegen_version: str) -> None:
+    # Keep root project version in pom.docker.xml aligned with released codegen version.
+    replace_text(
+        "pom.docker.xml",
+        [(r"<version>3\.0\.[0-9]+(?:-SNAPSHOT)?</version>", f"<version>{codegen_version}</version>")],
+    )
+
+
 def update_openapi_version(version: str) -> None:
     # Reflect current codegen version in online generator OpenAPI metadata.
     replace_text(
@@ -121,6 +137,8 @@ def main() -> int:
             return 2
         codegen_version, next_snapshot, generators_version = sys.argv[2:5]
         update_generators_poms(generators_version)
+        update_sample_meta_codegen_pom(codegen_version)
+        update_docker_pom_version(codegen_version)
         update_openapi_version(codegen_version)
         update_snapshot_rows(next_snapshot)
         update_release_rows(codegen_version)