From 7b63681cc220d743bbf22770bfdabef2e8434210 Mon Sep 17 00:00:00 2001
From: Haowen Liu <lhw@lunacd.com>
Date: Tue, 29 Apr 2025 20:53:13 -0400
Subject: [PATCH] Improve CMake setup

This commit configures and installs CMake metadata files. This also
provides the namespaced ALIAS target `cpp-subprocess::subprocess`.
---
 CMakeLists.txt                | 42 ++++++++++++++++++++++++++++++++---
 cmake/subprocess-config.cmake |  7 ++++++
 2 files changed, 46 insertions(+), 3 deletions(-)
 create mode 100644 cmake/subprocess-config.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 32d3851..c21809e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.5)
-project(subprocess VERSION 0.1.0 LANGUAGES CXX)
+project(subprocess VERSION 2.2 LANGUAGES CXX)
 
 set(CMAKE_CXX_STANDARD 11 CACHE STRING "C++ standard to use")
 option(EXPORT_COMPILE_COMMANDS "create clang compile database" ON)
@@ -13,12 +13,48 @@ target_link_libraries(subprocess INTERFACE Threads::Threads)
 target_sources(subprocess PUBLIC
     FILE_SET HEADERS
     FILES
-        subprocess/subprocess.hpp
+        cpp-subprocess/subprocess.hpp
     BASE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/
 )
+add_library(cpp-subprocess::subprocess ALIAS subprocess)
 
 if(SUBPROCESS_INSTALL)
-    install(FILES subprocess.hpp DESTINATION include/cpp-subprocess/)
+    install(
+        TARGETS subprocess COMPONENT subprocess
+        EXPORT subprocess
+        FILE_SET HEADERS DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+    )
+
+    include(CMakePackageConfigHelpers)
+
+    configure_package_config_file(
+        "${CMAKE_CURRENT_SOURCE_DIR}/cmake/subprocess-config.cmake.in"
+        "${CMAKE_CURRENT_BINARY_DIR}/subprocess-config.cmake"
+        INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/subprocess"
+        PATH_VARS PROJECT_NAME PROJECT_VERSION
+    )
+
+    write_basic_package_version_file(
+        "${CMAKE_CURRENT_BINARY_DIR}/beman.exemplar-version.cmake"
+        VERSION ${PROJECT_VERSION}
+        COMPATIBILITY ExactVersion
+    )
+
+    install(
+        FILES
+            "${CMAKE_CURRENT_BINARY_DIR}/subprocess-config.cmake"
+            "${CMAKE_CURRENT_BINARY_DIR}/subprocess-version.cmake"
+        DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/subprocess"
+        COMPONENT subprocess
+    )
+
+    install(
+        EXPORT subprocess
+        DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/beman.exemplar"
+        NAMESPACE cpp-subprocess::
+        FILE subprocess-targets.cmake
+        COMPONENT subprocess
+    )
 endif()
 
 if(SUBPROCESS_TESTS)
diff --git a/cmake/subprocess-config.cmake b/cmake/subprocess-config.cmake
new file mode 100644
index 0000000..004d900
--- /dev/null
+++ b/cmake/subprocess-config.cmake
@@ -0,0 +1,7 @@
+set(SUBPROCESS_VERSION @PROJECT_VERSION@)
+
+@PACKAGE_INIT@
+
+include(${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@-targets.cmake)
+
+check_required_components(@PROJECT_NAME@)