Add ability to use check for multiple labels

README.md

@@ -26,6 +26,9 @@ the changelog check will re-run and succeed automatically. This label can also
 be applied directly when opening the PR so the check will be automatically
 omitted.
 
+You can also set a custom set of labels using the `labels` inputs (separated by
+commas). If ANY of the labels matches, the check is skipped.
+
 ## Options
 
 The file that is being checked by default is called `CHANGES.md` but you can
@@ -63,4 +66,5 @@ jobs:
       - uses: tarides/changelog-check-action@v2
         with:
           changelog: CHANGES.md
+          labels: "no changelog,dependencies"
 ```

action.yml

@@ -8,16 +8,33 @@ inputs:
     description: Which file to use for checking that the changelog was modified
     required: false
     default: CHANGES.md
+  labels:
+    description: The labels (semicolon separated) that allow a PR to pass without modifying the changelog
+    required: false
+    default: "no changelog"
 runs:
   using: composite
   steps:
     - name: Checkout tree
       uses: actions/checkout@v5
       with:
         fetch-depth: 0
-    - name: Check for changes in changelog
+    - name: Check PR labels
+      shell: bash
+      id: skip-check
+      run: |
+        IFS=',' read -ra WANT <<< "${{ inputs.labels }}"
+        PR_LABELS="${{ join(github.event.pull_request.labels.*.name, ' ') }}"
+        for w in "${WANT[@]}"; do
+          if [[ " $PR_LABELS " == *" $w "* ]]; then
+            echo "skip=true" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+        done
+        echo "skip=false" >> "$GITHUB_OUTPUT"
+    - name: Alert for missing changes in changelog
+      if: steps.skip-check.outputs.skip == 'true'
       env:
         BASE_REF: ${{ github.event.pull_request.base.ref }}
-        NO_CHANGELOG_LABEL: ${{ contains(github.event.pull_request.labels.*.name, 'no changelog') }}
-      run: ${{ github.action_path }}/check.sh "${{ inputs.changelog }}"
+      run: ${{ github.action_path }}/fail.sh "${{ inputs.changelog }}"
       shell: bash

fail.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+set -uo pipefail
+
+CHANGELOG_FILE="${1:-CHANGES.md}"
+
+# a changelog check is required
+# fail if the diff is empty
+if git diff --exit-code "origin/${BASE_REF}" -- "${CHANGELOG_FILE}"; then
+    echo >&2 "User-visible changes should come with an entry in the changelog. This behavior
+can be overridden by using the \"no changelog\" label, which is used for changes
+that are not user-visible."
+    exit 1
+fi