From f5ba0929a243701f53b5a3dba3591d187c91bb25 Mon Sep 17 00:00:00 2001
From: Stephan Creutz <stephan.cr@gmx.de>
Date: Sun, 4 Apr 2021 12:11:50 +0200
Subject: [PATCH] Improve docopt-config.cmake in case of Boost regex

This commit declares the transitive dependency to Boost in case docopt
is build with Boost regex support. In this way, the user doesn't need
to declare the dependency to Boost manually.
---
 CMakeLists.txt         |  6 +++++-
 docopt-config.cmake    |  1 -
 docopt-config.cmake.in | 10 ++++++++++
 3 files changed, 15 insertions(+), 2 deletions(-)
 delete mode 100644 docopt-config.cmake
 create mode 100644 docopt-config.cmake.in

diff --git a/CMakeLists.txt b/CMakeLists.txt
index feff32e..2005677 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -125,8 +125,12 @@ install(FILES ${docopt_HEADERS} DESTINATION include/docopt)
 
 # CMake Package
 include(CMakePackageConfigHelpers)
+configure_package_config_file(
+  docopt-config.cmake.in
+  "${CMAKE_CURRENT_BINARY_DIR}/docopt-config.cmake"
+  INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/docopt")
 write_basic_package_version_file("${PROJECT_BINARY_DIR}/docopt-config-version.cmake" COMPATIBILITY SameMajorVersion)
-install(FILES docopt-config.cmake ${PROJECT_BINARY_DIR}/docopt-config-version.cmake DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/docopt")
+install(FILES "${CMAKE_CURRENT_BINARY_DIR}/docopt-config.cmake" ${PROJECT_BINARY_DIR}/docopt-config-version.cmake DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/docopt")
 install(EXPORT ${export_name} DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/docopt")
 
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/docopt.pc.in ${CMAKE_CURRENT_BINARY_DIR}/docopt.pc @ONLY)
diff --git a/docopt-config.cmake b/docopt-config.cmake
deleted file mode 100644
index 33c36c0..0000000
--- a/docopt-config.cmake
+++ /dev/null
@@ -1 +0,0 @@
-include("${CMAKE_CURRENT_LIST_DIR}/docopt-targets.cmake")
diff --git a/docopt-config.cmake.in b/docopt-config.cmake.in
new file mode 100644
index 0000000..2045052
--- /dev/null
+++ b/docopt-config.cmake.in
@@ -0,0 +1,10 @@
+@PACKAGE_INIT@
+
+include(CMakeFindDependencyMacro)
+if(@USE_BOOST_REGEX@)
+  find_dependency(Boost 1.53 COMPONENTS regex)
+endif()
+
+include("${CMAKE_CURRENT_LIST_DIR}/docopt-targets.cmake")
+
+check_required_components(docopt)