Change: Convert .md to .rtf for Windows/Mac packages

.github/workflows/release.yml

@@ -461,6 +461,13 @@ jobs:
       run: |
         tar -xf source.tar.gz --strip-components=1
 
+    - name: Install dependencies
+      env:
+        HOMEBREW_NO_AUTO_UPDATE: 1
+        HOMEBREW_NO_INSTALL_CLEANUP: 1
+      run: |
+        brew install pandoc
+
     # The following step can be removed when the build VM is updated with a revision of
     # vcpkg dating from roughly 01/01/2021 or later. At that point, `doNotUpdateVcpkg`
     # can be set to `true` and the `vcpkgGitCommitId` can be removed.
@@ -638,6 +645,11 @@ jobs:
       run: |
         tar -xf source.tar.gz --strip-components=1
 
+    - name: Install dependencies
+      shell: bash
+      run: |
+        choco install pandoc
+
     # "restore-cache" which is done by "run-vcpkg" uses Windows tar.
     # A git clone on windows marks a few files as read-only; when Windows tar
     # tries to extract the cache over this folder, it fails, despite the files

CMakeLists.txt

@@ -337,4 +337,8 @@ endif()
 include(CreateRegression)
 create_regression()
 
+if(APPLE OR WIN32)
+    find_package(Pandoc)
+endif()
+
 include(InstallAndPackage)

cmake/FindPandoc.cmake

@@ -0,0 +1,3 @@
+if(NOT EXISTS ${PANDOC_EXECUTABLE})
+    find_program(PANDOC_EXECUTABLE pandoc)
+endif()

cmake/InstallAndPackage.cmake

@@ -95,7 +95,14 @@ set(CPACK_PACKAGE_HOMEPAGE_URL "https://www.openttd.org/")
 set(CPACK_PACKAGE_CONTACT "OpenTTD <info@openttd.org>")
 set(CPACK_PACKAGE_INSTALL_DIRECTORY "OpenTTD")
 set(CPACK_PACKAGE_CHECKSUM "SHA256")
-set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_SOURCE_DIR}/COPYING.md")
+
+if((APPLE OR WIN32) AND EXISTS ${PANDOC_EXECUTABLE})
+    execute_process(COMMAND ${PANDOC_EXECUTABLE} "${CMAKE_SOURCE_DIR}/COPYING.md" -s -o "${CMAKE_BINARY_DIR}/COPYING.rtf")
+    set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_BINARY_DIR}/COPYING.rtf")
+else()
+    set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_SOURCE_DIR}/COPYING.md")
+endif()
+
 set(CPACK_RESOURCE_FILE_README "${CMAKE_SOURCE_DIR}/README.md")
 set(CPACK_MONOLITHIC_INSTALL YES)
 set(CPACK_PACKAGE_EXECUTABLES "openttd;OpenTTD")