From 11f0a82b2397030c3badc92058dd2fe3d096be7a Mon Sep 17 00:00:00 2001
From: Tiago Garcia <tiago.rgarcia@ua.pt>
Date: Thu, 18 Jul 2024 01:43:42 +0100
Subject: [PATCH] Install/uninstall cmake rules

Signed-off-by: Tiago Garcia <tiago.rgarcia@ua.pt>
---
 CMakeLists.txt           | 56 ++++++++++++++++++++++++++++------------
 gh-wh-handler.service.in |  2 +-
 uninstall.cmake.in       | 22 ++++++++++++++++
 3 files changed, 63 insertions(+), 17 deletions(-)
 create mode 100644 uninstall.cmake.in

diff --git a/CMakeLists.txt b/CMakeLists.txt
index cd25836..eec890f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,8 +3,22 @@ cmake_minimum_required(VERSION 3.20)
 # Project name and version
 project(gh-wh-handler VERSION 0.1.0)
 
+# Detect architecture
+if(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64")
+  set(ARCH "x86_64")
+elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64")
+  set(ARCH "aarch64")
+elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "armv7l")
+  set(ARCH "armv7l")
+elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "i686")
+  set(ARCH "i686")
+  # Add more architectures as needed
+else()
+  set(ARCH "unknown")
+endif()
+
 # Set the executable name
-set(EXECUTABLE_NAME "gh-wh-handler")
+set(EXECUTABLE_NAME "gh-wh-handler.${ARCH}")
 
 # Set the C++ standard
 set(CMAKE_CXX_STANDARD 23)
@@ -28,20 +42,30 @@ target_include_directories(${EXECUTABLE_NAME} PUBLIC ${INCLUDE_DIR})
 target_compile_options(${EXECUTABLE_NAME} PRIVATE -Wall -Werror)
 
 # Set linker flags for static linking
-set_target_properties(${EXECUTABLE_NAME} PROPERTIES
-    LINK_FLAGS "-static -static-libgcc -static-libstdc++"
-)
+set_target_properties(${EXECUTABLE_NAME} PROPERTIES LINK_FLAGS
+    "-static -static-libgcc -static-libstdc++")
 
-# Install the service
-set(CMAKE_INSTALL_PREFIX "/usr/")
-install(TARGETS ${EXECUTABLE_NAME} DESTINATION bin)
-set(SERVICE_EXECUTABLE "/services/gh-wh-handler/gh-wh-handler.aarch64")
-set(SERVICE_CONFIG_FILE "/services/gh-wh-handler/config.json")
-configure_file(${CMAKE_SOURCE_DIR}/gh-wh-handler.service.in ${CMAKE_BINARY_DIR}/gh-wh-handler.service @ONLY)
-install(FILES ${CMAKE_BINARY_DIR}/gh-wh-handler.service DESTINATION /etc/systemd/system)
-install(CODE "
-    execute_process(COMMAND systemctl daemon-reload)
-    execute_process(COMMAND systemctl enable gh-wh-handler.service)
-    execute_process(COMMAND systemctl start gh-wh-handler.service)
-")
+# Install the executable
+set(SERVICE_EXECUTABLE "/services/gh-wh-handler/${EXECUTABLE_NAME}")
+set(SERVICE_CONFIG "/services/gh-wh-handler/config.json")
+configure_file(
+    "${CMAKE_CURRENT_SOURCE_DIR}/gh-wh-handler.service.in"
+    "${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/gh-wh-handler.service"
+@ONLY)
+install(CODE "file(MAKE_DIRECTORY /services/gh-wh-handler)")
+install(TARGETS ${EXECUTABLE_NAME} DESTINATION /services/gh-wh-handler)
+install(CODE "execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink
+    /services/gh-wh-handler/${EXECUTABLE_NAME} /usr/bin/gh-wh-handler)")
+install(FILES "${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/gh-wh-handler.service"
+    DESTINATION /etc/systemd/system)
+install(CODE "execute_process(COMMAND systemctl daemon-reload)")
+install(CODE "execute_process(COMMAND systemctl enable gh-wh-handler)")
+install(CODE "execute_process(COMMAND systemctl start gh-wh-handler)")
 
+
+if(NOT TARGET uninstall)
+  configure_file(
+    "${CMAKE_CURRENT_SOURCE_DIR}/uninstall.cmake.in"
+    "${CMAKE_CURRENT_BINARY_DIR}/uninstall.cmake" IMMEDIATE @ONLY)
+  add_custom_target(uninstall COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/uninstall.cmake)
+endif()
diff --git a/gh-wh-handler.service.in b/gh-wh-handler.service.in
index 6e2e360..2726a50 100644
--- a/gh-wh-handler.service.in
+++ b/gh-wh-handler.service.in
@@ -3,7 +3,7 @@ Description=Runs github webhook handler
 After=network.target
 
 [Service]
-ExecStart=@SERVICE_EXECUTABLE@ @SERVICE_CONFIG_FILE@
+ExecStart=@SERVICE_EXECUTABLE@ @SERVICE_CONFIG@
 Restart=always
 Type=simple
 
diff --git a/uninstall.cmake.in b/uninstall.cmake.in
new file mode 100644
index 0000000..894c2a8
--- /dev/null
+++ b/uninstall.cmake.in
@@ -0,0 +1,22 @@
+message(STATUS "[0%] Stopping systemd service...")
+execute_process(COMMAND systemctl stop gh-wh-handler)
+
+message(STATUS "[15%] Disabling systemd service...")
+execute_process(COMMAND systemctl disable gh-wh-handler)
+
+message(STATUS "[30%] Removing service configuration file from systemd directory...")
+file(REMOVE /etc/systemd/system/gh-wh-handler.service)
+
+message(STATUS "[45%] Reloading systemd daemon...")
+execute_process(COMMAND systemctl daemon-reload)
+
+message(STATUS "[55%] Removing symlink to service executable...")
+execute_process(COMMAND rm /usr/bin/gh-wh-handler)
+
+message(STATUS "[70%] Removing service executable from service directory...")
+file(REMOVE /services/gh-wh-handler/@EXECUTABLE_NAME@)
+
+message(STATUS "[85%] Removing service directory...")
+file(REMOVE /services/gh-wh-handler)
+
+message(STATUS "[100%] Uninstallation complete!")