feat(release): add retry logic for release creation

- Introduces a `create_release` function with retry logic to handle
  transient failures during release creation.
- Improves error handling and logging for better debugging.
- Adjusts changelog parsing and workflow steps for clarity and
  robustness.

scripts/release-from-version.sh

@@ -1,13 +1,59 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
+create_release() {
+  local -r owner="$1" repo="$2" token="$3" version="$4" body_file="$5"
+  local -i max_attempts=3 delay=5 attempt
+  local http status
+
+  # Release-Body für die JSON-Payload einlesen
+  local body_json
+  body_json=$(tail -n +2 "$body_file" | jq -Rs .)
+
+  for (( attempt=1; attempt<=max_attempts; attempt++ )); do
+    echo "🚀 Try $attempt/$max_attempts: creating release v$version …"
+
+    http=$(curl -sS \
+      -H "Authorization: token $token" \
+      -H "Content-Type: application/json" \
+      -o resp.json -w '%{http_code}' \
+      -X POST "$GITHUB_API_URL/repos/$owner/$repo/releases" \
+      -d @- <<EOF
+{
+  "tag_name": "v$version",
+  "target_commitish": "main",
+  "name": "Release v$version",
+  "body": $body_json,
+  "draft": false,
+  "prerelease": false
+}
+EOF
+    )
+
+    status=$http
+    if [[ $status == 201 ]]; then
+      echo "✅ Release created (201)."
+      rm -f resp.json
+      return 0
+    elif [[ $status == 409 ]]; then
+      echo "🔁 Release already exists (409) – skipping."
+      rm -f resp.json
+      return 0
+    fi
+
+    echo "⚠️  Release attempt failed (HTTP $status)"
+    cat resp.json
+    [[ $attempt -lt $max_attempts ]] || { echo "❌ Giving up."; return 1; }
+    sleep $((delay*attempt))   # Back-off: 5 s, 10 s, 15 s …
+  done
+}
+
 VERSION_FILE="VERSION"
 CHANGELOG_FILE="CHANGELOG.md"
 CLIFF_CONFIG="cliff.toml"
 RELEASE_BODY_TMP="$(mktemp)"
-BODY_OUTPUT_VAR="changelog_body_path"
 
-# === Schritt 1: Read version from VERSION ===
+# === Schritt 1: Version lesen ===
 if [[ ! -f "$VERSION_FILE" ]]; then
   echo "❌ VERSION file not found"
   exit 1
@@ -15,7 +61,7 @@ fi
 VERSION="$(<"$VERSION_FILE")"
 echo "📦 Version: $VERSION"
 
-# === Schritt 2: Generate changelog for release ===
+# === Schritt 2: Changelog für Release erzeugen ===
 echo "📄 Generating changelog for tag v$VERSION"
 git-cliff -c "$CLIFF_CONFIG" -t "v$VERSION" -o "$CHANGELOG_FILE"
 
@@ -26,17 +72,15 @@ awk -v ver="$ESCAPED_VERSION" '
     print_flag=1
     line=$0
     sub(/^## /,"",line)
-    sub(/\\s*\\(.*\\)/, "", line)  # entfernt z. B. "(...)" oder "(*)"
+    sub(/\\s*\\(.*\\)/,"",line)
     print line
     next
   }
-  $0 ~ "^## \\[" && $0 !~ "^## \\[" ver "\\]" {
-    print_flag=0
-  }
+  $0 ~ "^## \\[" && $0 !~ "^## \\[" ver "\\]" { print_flag=0 }
   print_flag
 ' "$CHANGELOG_FILE" > "$RELEASE_BODY_TMP"
 
-# === Schritt 3: Commit updated changelog ===
+# === Schritt 3: Changelog committen ===
 git add "$CHANGELOG_FILE"
 if git diff --cached --quiet; then
   echo "✅ No changes to commit"
@@ -46,7 +90,7 @@ else
   git push origin main
 fi
 
-# === Schritt 4: Create tag if not exists ===
+# === Schritt 4: Tag anlegen, falls nötig ===
 if git rev-parse "v$VERSION" >/dev/null 2>&1; then
   echo "🔁 Tag v$VERSION already exists, skipping."
 else
@@ -57,9 +101,9 @@ else
   git push origin "v$VERSION"
 fi
 
-# === Schritt 5: Create Gitea release ===
-OWNER="$(echo "$GITHUB_REPOSITORY" | cut -d/ -f1)"
-REPO="$(echo "$GITHUB_REPOSITORY" | cut -d/ -f2)"
+# === Schritt 5: Release anlegen (mit Retry) ===
+OWNER="${GITHUB_REPOSITORY%/*}"
+REPO="${GITHUB_REPOSITORY#*/}"
 TOKEN="${RELEASE_PUBLISH_TOKEN:-$ACTIONS_RUNTIME_TOKEN}"
 
 if [[ -z "${RELEASE_PUBLISH_TOKEN:-}" ]]; then
@@ -69,29 +113,6 @@ if [[ -z "${RELEASE_PUBLISH_TOKEN:-}" ]]; then
   echo
 fi
 
-# Prüfen, ob Release bereits existiert
-if curl -sf "$GITHUB_API_URL/repos/$OWNER/$REPO/releases/tags/v$VERSION" \
-  -H "Authorization: token $TOKEN" > /dev/null; then
-  echo "🔁 Release for tag v$VERSION already exists, skipping."
-  exit 0
-fi
+create_release "$OWNER" "$REPO" "$TOKEN" "$VERSION" "$RELEASE_BODY_TMP"
 
-echo "🚀 Creating Gitea release for v$VERSION"
-
-RELEASE_BODY=$(tail -n +2 "$RELEASE_BODY_TMP" | jq -Rs .)
-
-curl -X POST "$GITHUB_API_URL/repos/$OWNER/$REPO/releases" \
-  -H "Authorization: token $TOKEN" \
-  -H "Content-Type: application/json" \
-  -d @- <<EOF
-{
-  "tag_name": "v$VERSION",
-  "target_commitish": "main",
-  "name": "Release v$VERSION",
-  "body": $RELEASE_BODY,
-  "draft": false,
-  "prerelease": false
-}
-EOF
-
-echo "✅ Release for tag $VERSION created successfully."
+echo "🎉 Workflow finished successfully."