From e566adaa72a8c753a055e8fa5745937db11714be Mon Sep 17 00:00:00 2001
From: Brad Kotsopoulos <brad.kotsopoulos@gmail.com>
Date: Mon, 25 Mar 2019 23:08:51 -0400
Subject: [PATCH] [Hunterize] Add support for installs, with a project config

---
 CMakeLists.txt        | 69 +++++++++++++++++++++++++++++++++++++++++--
 cmake/Config.cmake.in | 16 ++++++++++
 2 files changed, 82 insertions(+), 3 deletions(-)
 create mode 100644 cmake/Config.cmake.in

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2f08b2f7d..c7170c3bb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 # cmake -DCMAKE_BUILD_TYPE=Debug ..
 # cmake -DCMAKE_BUILD_TYPE=Release ..
-cmake_minimum_required(VERSION 2.8)
-project(bento4)
+cmake_minimum_required(VERSION 3.0.2)
+project(bento4 LANGUAGES CXX VERSION "0.0.0")
 
 # Variables
 set(SOURCE_ROOT ${CMAKE_CURRENT_SOURCE_DIR}/Source/C++)
@@ -26,6 +26,12 @@ file(GLOB AP4_SOURCES
   ${SOURCE_METADATA}/*.cpp
   ${SOURCE_SYSTEM}/StdC/*.cpp
 )
+file(GLOB AP4_HEADERS
+  ${SOURCE_CORE}/*.h
+  ${SOURCE_CODECS}/*.h
+  ${SOURCE_CRYPTO}/*.h
+  ${SOURCE_METADATA}/*.h
+)
 
 if(WIN32)
   set(AP4_SOURCES ${AP4_SOURCES} ${SOURCE_SYSTEM}/Win32/Ap4Win32Random.cpp)
@@ -36,17 +42,74 @@ endif()
 add_library(ap4 STATIC ${AP4_SOURCES})
 
 # Includes
-include_directories(
+list(APPEND BENTO4_INCLUDE_DIRS
   ${SOURCE_CORE}
   ${SOURCE_CODECS}
   ${SOURCE_CRYPTO}
   ${SOURCE_METADATA}
 )
+target_include_directories(
+  ap4
+  PUBLIC
+  "$<BUILD_INTERFACE:${BENTO4_INCLUDE_DIRS}>"
+)
 
 # Apps
 file(GLOB BENTO4_APPS RELATIVE ${SOURCE_ROOT}/Apps ${SOURCE_ROOT}/Apps/*)
 foreach(app ${BENTO4_APPS})
   string(TOLOWER ${app} binary_name)
+  list(APPEND BENTO4_APPS_LOWERCASE ${binary_name})
   add_executable(${binary_name} ${SOURCE_ROOT}/Apps/${app}/${app}.cpp)
   target_link_libraries(${binary_name} ap4)
 endforeach()
+
+# Introduce variables:
+# * CMAKE_INSTALL_LIBDIR
+# * CMAKE_INSTALL_BINDIR
+# * CMAKE_INSTALL_INCLUDEDIR
+include(GNUInstallDirs)
+
+set(GENERATED_DIR "${CMAKE_CURRENT_BINARY_DIR}/generated")
+set(VERSION_CONFIG "${GENERATED_DIR}/${PROJECT_NAME}ConfigVersion.cmake")
+set(PROJECT_CONFIG "${GENERATED_DIR}/${PROJECT_NAME}Config.cmake")
+
+set(CONFIG_INSTALL_DIR "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
+
+set(TARGETS_EXPORT_NAME "${PROJECT_NAME}Targets")
+set(NAMESPACE "${PROJECT_NAME}::")
+
+include(CMakePackageConfigHelpers)
+write_basic_package_version_file(
+  "${VERSION_CONFIG}" COMPATIBILITY ExactVersion
+)
+
+configure_package_config_file(
+  "cmake/Config.cmake.in"
+  "${PROJECT_CONFIG}"
+  INSTALL_DESTINATION "${CONFIG_INSTALL_DIR}"
+)
+
+install(
+  TARGETS ap4 ${BENTO4_APPS_LOWERCASE}
+  EXPORT "${TARGETS_EXPORT_NAME}"
+  INCLUDES DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
+  RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
+  LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+  ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+)
+
+install(
+  FILES ${AP4_HEADERS}
+  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_NAME}
+)
+
+install(
+  FILES "${PROJECT_CONFIG}" "${VERSION_CONFIG}"
+  DESTINATION "${CONFIG_INSTALL_DIR}"
+)
+
+install(
+  EXPORT "${TARGETS_EXPORT_NAME}"
+  NAMESPACE "${NAMESPACE}"
+  DESTINATION "${CONFIG_INSTALL_DIR}"
+)
diff --git a/cmake/Config.cmake.in b/cmake/Config.cmake.in
new file mode 100644
index 000000000..cc15d7254
--- /dev/null
+++ b/cmake/Config.cmake.in
@@ -0,0 +1,16 @@
+# Copyright (c) 2016, Ruslan Baratov
+#
+# Licensed under the MIT License (the "License"); you may not use this file except
+# in compliance with the License. You may obtain a copy of the License at
+#
+# http://opensource.org/licenses/MIT
+#
+# 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.
+
+@PACKAGE_INIT@
+
+include("${CMAKE_CURRENT_LIST_DIR}/@TARGETS_EXPORT_NAME@.cmake")
+check_required_components("@PROJECT_NAME@")