Buildscripts/cmake uninstall target

.github/workflows/cmake-install-uninstall.yml

@@ -0,0 +1,38 @@
+name: CMake Install & Uninstall
+
+on:
+  push:
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+    name: ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 5
+
+    strategy:
+      # Set fail-fast to false to ensure that feedback is delivered for all matrix combinations. Consider changing this to true when your workflow is stable.
+      fail-fast: false
+
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Configure CMake
+      run: |
+        cmake -S . -B .build -DCMAKE_BUILD_TYPE=Release
+
+    - name: Build CMake
+      run: |
+        cmake --build .build --config Release
+
+    - name: Install
+      run: |
+        cmake --install .build --prefix .install
+
+    - name: Uninstall
+      run: |
+        cmake --build .build --target uninstall

CMakeLists.txt

@@ -59,8 +59,8 @@ install(TARGETS h264bitstream h264_analyze svc_split
 	FILE_SET headers
 )
 
+# Support for pkg-config in consuming projects
 if(UNIX)
-	# Support for pkg-config in consuming projects
 	set(prefix "${CMAKE_INSTALL_PREFIX}")
 	set(exec_prefix "${CMAKE_INSTALL_PREFIX}")
 	set(libdir "\${prefix}/${CMAKE_INSTALL_LIBDIR}")
@@ -73,4 +73,16 @@ if(UNIX)
 	install(FILES "${CMAKE_CURRENT_BINARY_DIR}/libh264bitstream.pc"
 		DESTINATION "${CMAKE_INSTALL_DATAROOTDIR}/pkgconfig"
 	)
-endif(UNIX)
+endif(UNIX)
+
+# uninstall target
+if(NOT TARGET uninstall)
+	configure_file(
+		"${CMAKE_CURRENT_SOURCE_DIR}/cmake_uninstall.cmake.in"
+		"${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
+		IMMEDIATE @ONLY
+	)
+	add_custom_target(uninstall
+		COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake
+	)
+endif()

README.md

@@ -50,6 +50,12 @@ All commands below should be run from the project root directory.
           └── libh264bitstream.pc
   ```
 
+  CMake doesn't support `make uninstall` by default. But the project has the `uninstall` target, which deletes all files listed in `install_manifest.txt` file. To use it, run:
+
+  ```sh
+  cmake --build .builddir --target uninstall
+  ```
+
 ## Compile and Install with Autotools
 
 1. Install pre-requisites (Debian, Ubuntu)

cmake_uninstall.cmake.in

@@ -0,0 +1,20 @@
+if(NOT EXISTS "@CMAKE_BINARY_DIR@/install_manifest.txt")
+	message(FATAL_ERROR "Cannot find install manifest: @CMAKE_BINARY_DIR@/install_manifest.txt")
+endif()
+
+file(READ "@CMAKE_BINARY_DIR@/install_manifest.txt" files)
+string(REGEX REPLACE "\n" ";" files "${files}")
+foreach(file ${files})
+	message(STATUS "Uninstalling $ENV{DESTDIR}${file}")
+	if(IS_SYMLINK "$ENV{DESTDIR}${file}" OR EXISTS "$ENV{DESTDIR}${file}")
+		execute_process(
+			COMMAND "@CMAKE_COMMAND@" -E rm "$ENV{DESTDIR}${file}"
+			RESULT_VARIABLE rm_retval
+		)
+		if(NOT "${rm_retval}" STREQUAL 0)
+			message(FATAL_ERROR "Problem when removing $ENV{DESTDIR}${file}")
+		endif()
+	else(IS_SYMLINK "$ENV{DESTDIR}${file}" OR EXISTS "$ENV{DESTDIR}${file}")
+		message(STATUS "File $ENV{DESTDIR}${file} does not exist.")
+	endif()
+endforeach()