# Cap'n Proto CMake Package Configuration
#
# When configured and installed, this file enables client projects to find Cap'n Proto using
# CMake's find_package() command. It adds imported targets in the CapnProto:: namespace, such as
# CapnProto::kj, CapnProto::capnp, etc. (one target for each file in pkgconfig/*.pc.in), defines
# the capnp_generate_cpp() function, and exposes some variables for compatibility with the original
# FindCapnProto.cmake module.
#
# Example usage:
#   find_package(CapnProto)
#   capnp_generate_cpp(CAPNP_SRCS CAPNP_HDRS schema.capnp)
#   add_executable(foo main.cpp ${CAPNP_SRCS})
#   target_link_libraries(foo PRIVATE CapnProto::capnp)
#   target_include_directories(foo PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
#
# If you are using RPC features, use 'CapnProto::capnp-rpc' in the target_link_libraries() call.
#
# Paths to `capnp` and `capnpc-c++` are exposed in the following variables:
#   CAPNP_EXECUTABLE
#       Path to the `capnp` tool (can be set to override).
#   CAPNPC_CXX_EXECUTABLE
#       Path to the `capnpc-c++` tool (can be set to override).
#
# For FindCapnProto.cmake compatibility, the following variables are also provided. Please prefer
# using the imported targets in new CMake code.
#   CAPNP_INCLUDE_DIRS
#       Include directories for the library's headers.
#   CANP_LIBRARIES
#       The Cap'n Proto library paths.
#   CAPNP_LIBRARIES_LITE
#       Paths to only the 'lite' libraries.
#   CAPNP_DEFINITIONS
#       Compiler definitions required for building with the library.
#   CAPNP_FOUND
#       Set if the libraries have been located (prefer using CapnProto_FOUND in new code).
#
set(CAPNP_PKG_CONFIG_FILES    pkgconfig/capnp.pc   pkgconfig/capnpc.pc   pkgconfig/capnp-rpc.pc   pkgconfig/capnp-json.pc   pkgconfig/capnp-websocket.pc   pkgconfig/kj.pc   pkgconfig/kj-async.pc   pkgconfig/kj-http.pc   pkgconfig/kj-gzip.pc   pkgconfig/kj-tls.pc   pkgconfig/kj-test.pc )

set(CapnProto_VERSION 1.4.0)

set(CAPNP_EXECUTABLE $<TARGET_FILE:CapnProto::capnp_tool>
    CACHE FILEPATH "Location of capnp executable")
set(CAPNPC_CXX_EXECUTABLE $<TARGET_FILE:CapnProto::capnpc_cpp>
    CACHE FILEPATH "Location of capnpc-c++ executable")
set(CAPNP_INCLUDE_DIRECTORY "${CMAKE_CURRENT_LIST_DIR}/../../../include")

# work around http://public.kitware.com/Bug/view.php?id=15258
if(NOT _IMPORT_PREFIX)
  set(_IMPORT_PREFIX ${PACKAGE_PREFIX_DIR})
endif()

if (NO) # WITH_OPENSSL
  include(CMakeFindDependencyMacro)
  if (CMAKE_VERSION VERSION_LESS 3.9)
    # find_dependency() did not support COMPONENTS until CMake 3.9
    #
    # in practice, this call can be erroneous
    # if the user has only libcrypto installed, but not libssl
    find_dependency(OpenSSL)
  else()
    find_dependency(OpenSSL COMPONENTS Crypto SSL)
  endif()
endif()

if (@WITH_ZLIB@) # WITH_ZLIB
  include(CMakeFindDependencyMacro)
  find_dependency(ZLIB)
endif()

if (NO) # _WITH_LIBUCONTEXT
  set(forwarded_config_flags)
  if(CapnProto_FIND_QUIETLY)
    list(APPEND forwarded_config_flags QUIET)
  endif()
  if(CapnProto_FIND_REQUIRED)
    list(APPEND forwarded_config_flags REQUIRED)
  endif()
  # If the consuming project called find_package(CapnProto) with the QUIET or REQUIRED flags, forward
  # them to calls to find_package(PkgConfig) and pkg_check_modules(). Note that find_dependency()
  # would do this for us in the former case, but there is no such forwarding wrapper for
  # pkg_check_modules().

  find_package(PkgConfig ${forwarded_config_flags})
  if(NOT ${PkgConfig_FOUND})
    # If we're here, the REQUIRED flag must not have been passed, else we would have had a fatal
    # error. Nevertheless, a diagnostic for this case is probably nice.
    if(NOT CapnProto_FIND_QUIETLY)
      message(WARNING "pkg-config cannot be found")
    endif()
    set(CapnProto_FOUND OFF)
    return()
  endif()

  if (CMAKE_VERSION VERSION_LESS 3.6)
    # CMake >= 3.6 required due to the use of IMPORTED_TARGET
    message(SEND_ERROR "libucontext support requires CMake >= 3.6.")
  endif()

  pkg_check_modules(libucontext IMPORTED_TARGET ${forwarded_config_flags} libucontext)
endif()

include("${CMAKE_CURRENT_LIST_DIR}/CapnProtoTargets.cmake")
include("${CMAKE_CURRENT_LIST_DIR}/CapnProtoMacros.cmake")


# FindCapnProto.cmake provides dependency information via several CAPNP_-prefixed variables. New
# code should not rely on these variables, but prefer linking directly to the imported targets we
# now provide. However, we should still set these variables to ease the transition for projects
# which currently depend on the find-module.

set(CAPNP_INCLUDE_DIRS ${CAPNP_INCLUDE_DIRECTORY})

# No need to list all libraries, just the leaves of the dependency tree.
set(CAPNP_LIBRARIES_LITE CapnProto::capnp)
set(CAPNP_LIBRARIES CapnProto::capnp-rpc CapnProto::capnp-json
                    CapnProto::kj-http)

set(CAPNP_DEFINITIONS)
if(TARGET CapnProto::capnp AND NOT TARGET CapnProto::capnp-rpc)
  set(CAPNP_DEFINITIONS -DCAPNP_LITE)
endif()

set(CAPNP_FOUND ${CapnProto_FOUND})
