chore: add license headers

.github/licenses/add-headers.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Adds license headers to all source files.
+set -e
+
+REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+cd "$REPO_ROOT"
+
+COMMON_IGNORES=(
+  --ignore "**/*.yml"
+  --ignore "**/*.yaml"
+  --ignore "**/*.xml"
+  --ignore "**/*.html"
+  --ignore "**/*.js"
+  --ignore "**/*.txt"
+  --ignore "**/*.json"
+  --ignore "**/*.md"
+  --ignore "**/*.lock"
+  --ignore "**/.dart_tool/**"
+  --ignore "**/node_modules/**"
+)
+
+# Dart files — built-in Apache 2.0 template with // comment style
+addlicense -l apache -c "Google LLC" \
+  "${COMMON_IGNORES[@]}" \
+  --ignore "**/*.g.dart" \
+  --ignore "**/*.sh" \
+  --ignore "**/*.ts" \
+  .
+
+# TypeScript and shell files — custom template (/** */ and # styles)
+addlicense -f "$REPO_ROOT/.github/licenses/default.txt" -c "Google LLC" \
+  "${COMMON_IGNORES[@]}" \
+  --ignore "**/*.dart" \
+  .

.github/licenses/check-headers.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Checks license headers on all source files (dry run).
+set -e
+
+REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
+cd "$REPO_ROOT"
+
+COMMON_IGNORES=(
+  --ignore "**/*.yml"
+  --ignore "**/*.yaml"
+  --ignore "**/*.xml"
+  --ignore "**/*.html"
+  --ignore "**/*.js"
+  --ignore "**/*.txt"
+  --ignore "**/*.json"
+  --ignore "**/*.md"
+  --ignore "**/*.lock"
+  --ignore "**/.dart_tool/**"
+  --ignore "**/node_modules/**"
+)
+
+# Dart files
+addlicense -l apache -c "Google LLC" --check \
+  "${COMMON_IGNORES[@]}" \
+  --ignore "**/*.g.dart" \
+  --ignore "**/*.sh" \
+  --ignore "**/*.ts" \
+  .
+
+# TypeScript and shell files
+addlicense -f "$REPO_ROOT/.github/licenses/default.txt" -c "Google LLC" --check \
+  "${COMMON_IGNORES[@]}" \
+  --ignore "**/*.dart" \
+  .

.github/licenses/default.txt

@@ -0,0 +1,13 @@
+Copyright {{.Year}} {{.Holder}}
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

.github/workflows/build.yml

@@ -18,6 +18,23 @@ on:
         default: 'stable'
 
 jobs:
+  # Check license headers on all source files
+  check-license-header:
+    name: Check License Headers
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Download addlicense
+        run: |
+          curl -sL https://github.com/google/addlicense/releases/download/v1.2.0/addlicense_v1.2.0_Linux_x86_64.tar.gz | tar xz -C /usr/local/bin addlicense
+          chmod +x /usr/local/bin/addlicense
+
+      - name: Check license headers
+        run: .github/licenses/check-headers.sh
+
   lint:
     name: Lint (Dart ${{ matrix.dart-version }})
     runs-on: ubuntu-latest
@@ -349,7 +366,7 @@ jobs:
   build:
     name: Build verification (Dart ${{ matrix.dart-version }})
     runs-on: ubuntu-latest
-    needs: [lint, test, test-integration]
+    needs: [lint, test, test-integration, check-license-header]
     # Run even if test-integration was skipped (fork PRs), but not if lint or test failed
     if: |
       always() &&
@@ -390,5 +407,12 @@ jobs:
         run: melos bootstrap
         working-directory: .
 
+      - name: Validate license headers
+        run: |
+          if [ "${{ needs.check-license-header.result }}" != "success" ]; then
+            echo "❌ License header check failed"
+            exit 1
+          fi
+
       - name: Verify package
         run: dart pub publish --dry-run

CONTRIBUTING.md

@@ -0,0 +1 @@
+packages/dart_firebase_admin/CONTRIBUTING.md

LICENSE

@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2020 Invertase Limited
+   Copyright 2026 Google LLC
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

gen-version.sh

@@ -1,4 +1,18 @@
 #!/bin/bash
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 
 # Script to generate version.g.dart files for all packages
 # Finds all packages/*/pubspec.yaml files, extracts version, and writes to package/lib/version.g.dart