- introduce new configuration option, allowing to provide an empty_content for categories matching no PRs

- FIX https://github.com/mikepenz/release-changelog-builder-action/issues/804

src/configuration.ts

@@ -21,6 +21,7 @@ export interface Category {
   labels: string[] // labels to associate PRs to this category
   exclude_labels?: string[] // if an exclude label is detected, the PR will be excluded from this category
   exhaustive?: boolean // requires all labels to be present in the PR
+  empty_content ?: string // if the category has no matching PRs, this content will be used. If not set, the category will be skipped in the changelog.
 }
 
 export interface Sort {

src/transform.ts

@@ -183,9 +183,10 @@ export function buildChangelog(
       for (const pr of pullRequests) {
         changelog = `${changelog + pr}\n`
       }
-
-      // add space between
-      changelog = `${changelog}\n`
+      changelog = `${changelog}\n` // add space between sections
+    } else if (category.empty_content !== undefined) {
+      changelog = `${changelog + category.title}\n\n`
+      changelog = `${changelog + category.empty_content}\n\n`
     }
   }
   core.info(`✒️ Wrote ${categorizedPrs.length} categorized pull requests down`)