ci: Add license checker to CI pipeline.

Author: JanEbbing

.gitlab-ci.yml

@@ -30,6 +30,12 @@ spotless:
   stage: check
   script: ./gradlew spotlessCheck
 
+licenseCheck:
+  stage: check
+  script:
+    - ./license_checker.sh '*.java' | tee license_check_output.txt
+    - '[ ! -s license_check_output.txt ]'
+
 # stage: build ----------------------
 
 build:

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+### Added
+* Script to check our source code for license headers and a step for them in the CI.
+
 ## [1.1.0] - 2023-01-26
 ### Added
 * Add example maven project using this library.
@@ -71,6 +75,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 Initial version.
 
 
+[Unreleased]: https://github.com/DeepLcom/deepl-java/compare/v1.1.0...HEAD
 [1.1.0]: https://github.com/DeepLcom/deepl-java/compare/v1.0.1...v1.1.0
 [1.0.1]: https://github.com/DeepLcom/deepl-java/compare/v1.0.0...v1.0.1
 [1.0.0]: https://github.com/DeepLcom/deepl-java/compare/v0.2.1...v1.0.0

license_checker.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+# Usage: ./license_checker.sh source_code_pattern
+# Example: ./license_checker.sh '*.py'
+# This will search all .py files, ignoring anything not tracked in your git tree
+
+git ls-files -z $1 | xargs -0 -I{} sh -c 'RES=$(head -n 3 "{}" | grep "Copyright 20[0-9][0-9] DeepL SE (https://www.deepl.com)"); if [ ! "${RES}" ] ; then echo "Lacking copyright header in" "{}" ; fi'