# CMake 3.15 is required to support Corrosion
# CMake 3.19 is needed for file(REAL_PATH)
cmake_minimum_required(VERSION 3.19)

list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/cmake")

include(cmake/Mac.cmake)

project(fish)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

# We are C++11.
set(CMAKE_CXX_STANDARD 11)
set(DEFAULT_BUILD_TYPE "Debug")

# Generate Xcode schemas (but not for tests).
set(CMAKE_XCODE_GENERATE_SCHEME 1)

if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
    message(STATUS "Setting build type to default '${DEFAULT_BUILD_TYPE}'")
    set(CMAKE_BUILD_TYPE "${DEFAULT_BUILD_TYPE}")
endif()

# Set up standard directories.
include(GNUInstallDirs)
add_definitions(-D_UNICODE=1)

include(cmake/ConfigureChecks.cmake)
include(cmake/gettext.cmake)

# Set up PCRE2
# This sets an environment variable that needs to be available before the Rust stanzas
include(cmake/PCRE2.cmake)

include(cmake/Rust.cmake)

# Error out when linking statically, it doesn't work.
if (CMAKE_EXE_LINKER_FLAGS MATCHES ".*-static.*")
    message(FATAL_ERROR "Fish does not support static linking")
endif()

# Force colored warnings in Ninja's output, if the compiler has -fdiagnostics-color support.
# Rationale in https://github.com/ninja-build/ninja/issues/814
if (CMAKE_GENERATOR STREQUAL "Ninja" AND
    ((CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.9) OR
     (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.5) OR
     (CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang" AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 6.0)))
      add_compile_options(-fdiagnostics-color=always)
endif()

# Enable a whole bunch of warnings, but turn off:
# - comment because we use a bunch of those, and they're not really all that harmful.
# - address, because that occurs for our mkostemp check (weak-linking requires us to compare `&mkostemp == nullptr`).
add_compile_options(-Wall -Wextra -Wno-comment -Wno-address)

if ((CMAKE_CXX_COMPILER_ID STREQUAL "Clang") OR (CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang"))
  add_compile_options(-Wunused-template -Wunused-local-typedef -Wunused-macros)
endif()

# Disable exception handling.
add_compile_options(-fno-exceptions)

# Hide the CMake Rules directories in Xcode projects.
source_group("CMake Rules" REGULAR_EXPRESSION "^$")

# Put source and header files at top level under targets.
source_group("Source Files" REGULAR_EXPRESSION ".*\\.cpp")
source_group("Header Files" REGULAR_EXPRESSION ".*\\.h")
source_group("Builtins" "builtins/")

# Support folders.
set_property(GLOBAL PROPERTY USE_FOLDERS ON)

# Work around issue where archive-built libs go in the wrong place.
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR})

if(CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_CURRENT_BINARY_DIR)
  set(FISH_IN_TREE_BUILD TRUE)
else()
  set(FISH_IN_TREE_BUILD FALSE)
endif()

# Set up the machinery around FISH-BUILD-VERSION-FILE
# This defines the FBVF variable.
include(Version)

# Let fish pick up when we're running out of the build directory without installing
get_filename_component(REAL_CMAKE_BINARY_DIR "${CMAKE_BINARY_DIR}" REALPATH)
get_filename_component(REAL_CMAKE_SOURCE_DIR "${CMAKE_SOURCE_DIR}" REALPATH)
add_definitions(-DCMAKE_BINARY_DIR="${REAL_CMAKE_BINARY_DIR}")
add_definitions(-DCMAKE_SOURCE_DIR="${REAL_CMAKE_SOURCE_DIR}")

# Enable thread-safe errno on Solaris (#5611)
add_definitions(-D_REENTRANT)

# cargo needs to be rerun when the sources change.
# This is imperfect, but the ninja generator really wants to
# not run cargo, so we need to tell it *something*
FILE(GLOB sources src/*)

# Define a function to link dependencies.
function(FISH_LINK_DEPS_AND_SIGN target)
  add_custom_command(
    OUTPUT ${rust_target_dir}/${rust_profile}/${target}
    COMMAND ${CMAKE_COMMAND} -E env
      ${VARS_FOR_CARGO}
    ${Rust_CARGO} ARGS build --bin ${target}
      $<$<CONFIG:Release,RelWithDebInfo>:--release>
      --target ${Rust_CARGO_TARGET}
      ${CARGO_FLAGS}
      ${FEATURES_ARG}
    DEPENDS ${sources}
    DEPENDS Cargo.toml Cargo.lock build.rs
    WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
    USES_TERMINAL
    # Don't use VERBATIM here, to allow the generator expressions above to expand to nothing rather than an empty string
  )
  add_custom_target(${target} ALL
    COMMAND "${CMAKE_COMMAND}" -E copy
      "${rust_target_dir}/${rust_profile}/${target}"
      "${CMAKE_CURRENT_BINARY_DIR}"
    DEPENDS ${rust_target_dir}/${rust_profile}/${target}
  )
  codesign_on_mac(${target})
endfunction(FISH_LINK_DEPS_AND_SIGN)

# Define fish.
fish_link_deps_and_sign(fish)

# Define fish_indent.
fish_link_deps_and_sign(fish_indent)

# Define fish_key_reader.
fish_link_deps_and_sign(fish_key_reader)

# Set up the docs.
include(cmake/Docs.cmake)

# A helper for running tests.
add_executable(fish_test_helper src/fish_test_helper.cpp)

# Set up tests.
include(cmake/Tests.cmake)

# Benchmarking support.
include(cmake/Benchmark.cmake)

# Set up install.
include(cmake/Install.cmake)

# Mac app.
include(cmake/MacApp.cmake)

# ThreadSanitizer likes to muck with signal handlers, which interferes
# with fish_test_helper printing the ignored signal mask.
# Ensure fish_test_helper does not use TSan.
# Note the environment var is CXXFLAGS, but the CMake var is CMAKE_CXX_FLAGS.
if (CMAKE_CXX_FLAGS MATCHES ".*-fsanitize=thread.*")
  target_compile_options(fish_test_helper PRIVATE "-fno-sanitize=all")
  target_link_libraries(fish_test_helper "-fno-sanitize=all")
endif()

include(FeatureSummary)
feature_summary(WHAT ALL)