[build] Remove Mason submodule in favor of CMake mason

2 files changed, 214 insertions, 6 deletions

diff --git a/cmake/mason.cmake b/cmake/mason.cmake
new file mode 100644
index 0000000000..4e4e46b619
--- /dev/null
+++ b/cmake/mason.cmake
@@ -0,0 +1,212 @@
+# Mason CMake
+
+include(CMakeParseArguments)
+
+function(mason_detect_platform)
+    # Determine platform
+    if(NOT MASON_PLATFORM)
+        # we call uname -s manually here since
+        # CMAKE_HOST_SYSTEM_NAME will not be defined before the project() call
+        execute_process(
+            COMMAND uname -s
+            OUTPUT_VARIABLE UNAME
+            OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+        if (UNAME STREQUAL "Darwin")
+            set(MASON_PLATFORM "osx" PARENT_SCOPE)
+        else()
+            set(MASON_PLATFORM "linux" PARENT_SCOPE)
+        endif()
+    endif()
+
+    # Determine platform version string
+    if(NOT MASON_PLATFORM_VERSION)
+        execute_process(
+            COMMAND uname -m
+            OUTPUT_VARIABLE MASON_PLATFORM_VERSION
+            OUTPUT_STRIP_TRAILING_WHITESPACE)
+        set(MASON_PLATFORM_VERSION "${MASON_PLATFORM_VERSION}" PARENT_SCOPE)
+    endif()
+endfunction()
+
+function(mason_use _PACKAGE)
+    if(NOT _PACKAGE)
+        message(FATAL_ERROR "[Mason] No package name given")
+    endif()
+
+    cmake_parse_arguments("" "HEADER_ONLY" "VERSION" "" ${ARGN})
+
+    if(_UNPARSED_ARGUMENTS)
+        message(FATAL_ERROR "[Mason] mason_use() called with unrecognized arguments: ${_UNPARSED_ARGUMENTS}")
+    endif()
+
+    if(NOT _VERSION)
+        message(FATAL_ERROR "[Mason] Specifying a version is required")
+    endif()
+
+    if(MASON_PACKAGE_${_PACKAGE}_INVOCATION STREQUAL "${MASON_INVOCATION}")
+        # Check that the previous invocation of mason_use didn't select another version of this package
+        if(NOT MASON_PACKAGE_${_PACKAGE}_VERSION STREQUAL ${_VERSION})
+            message(FATAL_ERROR "[Mason] Already using ${_PACKAGE} ${MASON_PACKAGE_${_PACKAGE}_VERSION}. Cannot select version ${_VERSION}.")
+        endif()
+    else()
+        if(_HEADER_ONLY)
+            set(_PLATFORM_ID "headers")
+        else()
+            set(_PLATFORM_ID "${MASON_PLATFORM}-${MASON_PLATFORM_VERSION}")
+        endif()
+
+        set(_SLUG "${_PLATFORM_ID}/${_PACKAGE}/${_VERSION}")
+        set(_INSTALL_PATH "${MASON_PACKAGE_DIR}/${_SLUG}")
+        file(RELATIVE_PATH _INSTALL_PATH_RELATIVE "${CMAKE_CURRENT_SOURCE_DIR}" "${_INSTALL_PATH}")
+
+        if(NOT EXISTS "${_INSTALL_PATH}")
+            set(_CACHE_PATH "${MASON_PACKAGE_DIR}/.binaries/${_SLUG}.tar.gz")
+            if (NOT EXISTS "${_CACHE_PATH}")
+                # Download the package
+                set(_URL "${MASON_REPOSITORY}/${_SLUG}.tar.gz")
+                message("[Mason] Downloading package ${_URL}...")
+
+                set(_FAILED)
+                set(_ERROR)
+                # Note: some CMake versions are compiled without SSL support
+                get_filename_component(_CACHE_DIR "${_CACHE_PATH}" DIRECTORY)
+                file(MAKE_DIRECTORY "${_CACHE_DIR}")
+                execute_process(
+                    COMMAND curl --retry 3 -s -f -S -L "${_URL}" -o "${_CACHE_PATH}.tmp"
+                    RESULT_VARIABLE _FAILED
+                    ERROR_VARIABLE _ERROR)
+                if(_FAILED)
+                    message(FATAL_ERROR "[Mason] Failed to download ${_URL}: ${_ERROR}")
+                else()
+                    # We downloaded to a temporary file to prevent half-finished downloads
+                    file(RENAME "${_CACHE_PATH}.tmp" "${_CACHE_PATH}")
+                endif()
+            endif()
+
+            # Unpack the package
+            message("[Mason] Unpacking package to ${_INSTALL_PATH_RELATIVE}...")
+            file(MAKE_DIRECTORY "${_INSTALL_PATH}")
+            execute_process(
+                COMMAND ${CMAKE_COMMAND} -E tar xzf "${_CACHE_PATH}"
+                WORKING_DIRECTORY "${_INSTALL_PATH}")
+        endif()
+
+        # Error out if there is no config file.
+        if(NOT EXISTS "${_INSTALL_PATH}/mason.ini")
+            message(FATAL_ERROR "[Mason] Could not find mason.ini for package ${_PACKAGE} ${_VERSION}")
+        endif()
+
+        set(MASON_PACKAGE_${_PACKAGE}_PREFIX "${_INSTALL_PATH}" CACHE STRING "${_PACKAGE} ${_INSTALL_PATH}" FORCE)
+        mark_as_advanced(MASON_PACKAGE_${_PACKAGE}_PREFIX)
+
+        # Load the configuration from the ini file
+        file(STRINGS "${_INSTALL_PATH}/mason.ini" _CONFIG_FILE)
+        foreach(_LINE IN LISTS _CONFIG_FILE)
+            string(REGEX MATCH "^([a-z_]+) *= *" _KEY "${_LINE}")
+            if (_KEY)
+                string(LENGTH "${_KEY}" _KEY_LENGTH)
+                string(SUBSTRING "${_LINE}" ${_KEY_LENGTH} -1 _VALUE)
+                string(REGEX REPLACE ";.*$" "" _VALUE "${_VALUE}") # Trim trailing commas
+                string(REPLACE "{prefix}" "${_INSTALL_PATH}" _VALUE "${_VALUE}")
+                string(STRIP "${_VALUE}" _VALUE)
+                string(REPLACE "=" "" _KEY "${_KEY}")
+                string(STRIP "${_KEY}" _KEY)
+                string(TOUPPER "${_KEY}" _KEY)
+                if(_KEY STREQUAL "INCLUDE_DIRS" OR _KEY STREQUAL "STATIC_LIBS" )
+                    separate_arguments(_VALUE)
+                endif()
+                set(MASON_PACKAGE_${_PACKAGE}_${_KEY} "${_VALUE}" CACHE STRING "${_PACKAGE} ${_KEY}" FORCE)
+                mark_as_advanced(MASON_PACKAGE_${_PACKAGE}_${_KEY})
+            endif()
+        endforeach()
+
+        # Compare version in the package to catch errors early on
+        if(NOT _VERSION STREQUAL MASON_PACKAGE_${_PACKAGE}_VERSION)
+            message(FATAL_ERROR "[Mason] Package at ${_INSTALL_PATH_RELATIVE} has version '${MASON_PACKAGE_${_PACKAGE}_VERSION}', but required '${_VERSION}'")
+        endif()
+
+        if(NOT _PACKAGE STREQUAL MASON_PACKAGE_${_PACKAGE}_NAME)
+            message(FATAL_ERROR "[Mason] Package at ${_INSTALL_PATH_RELATIVE} has name '${MASON_PACKAGE_${_PACKAGE}_NAME}', but required '${_NAME}'")
+        endif()
+
+        if(NOT _HEADER_ONLY)
+            if(NOT MASON_PLATFORM STREQUAL MASON_PACKAGE_${_PACKAGE}_PLATFORM)
+                message(FATAL_ERROR "[Mason] Package at ${_INSTALL_PATH_RELATIVE} has platform '${MASON_PACKAGE_${_PACKAGE}_PLATFORM}', but required '${MASON_PLATFORM}'")
+            endif()
+
+            if(NOT MASON_PLATFORM_VERSION STREQUAL MASON_PACKAGE_${_PACKAGE}_PLATFORM_VERSION)
+                message(FATAL_ERROR "[Mason] Package at ${_INSTALL_PATH_RELATIVE} has platform version '${MASON_PACKAGE_${_PACKAGE}_PLATFORM_VERSION}', but required '${MASON_PLATFORM_VERSION}'")
+            endif()
+        endif()
+
+        # Concatenate the static libs and libraries
+        set(_LIBRARIES)
+        list(APPEND _LIBRARIES ${MASON_PACKAGE_${_PACKAGE}_STATIC_LIBS} ${MASON_PACKAGE_${_PACKAGE}_LDFLAGS})
+        set(MASON_PACKAGE_${_PACKAGE}_LIBRARIES "${_LIBRARIES}" CACHE STRING "${_PACKAGE} _LIBRARIES" FORCE)
+        mark_as_advanced(MASON_PACKAGE_${_PACKAGE}_LIBRARIES)
+
+        if(NOT _HEADER_ONLY)
+            string(REGEX MATCHALL "(^| +)-L *([^ ]+)" MASON_PACKAGE_${_PACKAGE}_LIBRARY_DIRS "${MASON_PACKAGE_${_PACKAGE}_LDFLAGS}")
+            string(REGEX REPLACE "(^| +)-L *" "\\1" MASON_PACKAGE_${_PACKAGE}_LIBRARY_DIRS "${MASON_PACKAGE_${_PACKAGE}_LIBRARY_DIRS}")
+            set(MASON_PACKAGE_${_PACKAGE}_LIBRARY_DIRS "${MASON_PACKAGE_${_PACKAGE}_LIBRARY_DIRS}" CACHE STRING "${_PACKAGE} ${MASON_PACKAGE_${_PACKAGE}_LIBRARY_DIRS}" FORCE)
+            mark_as_advanced(MASON_PACKAGE_${_PACKAGE}_LIBRARY_DIRS)
+        endif()
+
+        # Store invocation ID to prevent different versions of the same package in one invocation
+        set(MASON_PACKAGE_${_PACKAGE}_INVOCATION "${MASON_INVOCATION}" CACHE INTERNAL "${_PACKAGE} invocation ID" FORCE)
+    endif()
+endfunction()
+
+macro(target_add_mason_package _TARGET _VISIBILITY _PACKAGE)
+    if (NOT MASON_PACKAGE_${_PACKAGE}_INVOCATION)
+        message(FATAL_ERROR "[Mason] Package ${_PACKAGE} has not been initialized yet")
+    endif()
+
+    target_include_directories(${_TARGET} ${_VISIBILITY} "${MASON_PACKAGE_${_PACKAGE}_INCLUDE_DIRS}")
+    target_compile_definitions(${_TARGET} ${_VISIBILITY} "${MASON_PACKAGE_${_PACKAGE}_DEFINITIONS}")
+    target_compile_options(${_TARGET} ${_VISIBILITY} "${MASON_PACKAGE_${_PACKAGE}_OPTIONS}")
+    target_link_libraries(${_TARGET} ${_VISIBILITY} "${MASON_PACKAGE_${_PACKAGE}_LIBRARIES}")
+endmacro()
+
+# Setup
+
+string(RANDOM LENGTH 16 MASON_INVOCATION)
+
+# Read environment variables if CMake is run in command mode
+if (CMAKE_ARGC)
+    set(MASON_PLATFORM "$ENV{MASON_PLATFORM}")
+    set(MASON_PLATFORM_VERSION "$ENV{MASON_PLATFORM_VERSION}")
+    set(MASON_PACKAGE_DIR "$ENV{MASON_PACKAGE_DIR}")
+    set(MASON_REPOSITORY "$ENV{MASON_REPOSITORY}")
+endif()
+
+# Directory where Mason packages are located; typically ends with mason_packages
+if (NOT MASON_PACKAGE_DIR)
+    set(MASON_PACKAGE_DIR "${CMAKE_SOURCE_DIR}/mason_packages")
+endif()
+
+# URL prefix of where packages are located.
+if (NOT MASON_REPOSITORY)
+    set(MASON_REPOSITORY "https://mason-binaries.s3.amazonaws.com")
+endif()
+
+mason_detect_platform()
+
+# Execute commands if CMake is run in command mode
+if (CMAKE_ARGC)
+    # Collect remaining arguments for passing to mason_use
+    set(_MASON_ARGS)
+    foreach(I RANGE 4 ${CMAKE_ARGC})
+        list(APPEND _MASON_ARGS "${CMAKE_ARGV${I}}")
+    endforeach()
+
+    # Install the package
+    mason_use(${_MASON_ARGS})
+
+    # Optionally print variables
+    if(DEFINED MASON_PACKAGE_${CMAKE_ARGV4}_${CMAKE_ARGV3})
+        # CMake can't write to stdout with message()
+        execute_process(COMMAND ${CMAKE_COMMAND} -E echo "${MASON_PACKAGE_${CMAKE_ARGV4}_${CMAKE_ARGV3}}")
+    endif()
+endif()
diff --git a/cmake/mbgl.cmake b/cmake/mbgl.cmake
index ca0487ef34..813e4ba071 100644
--- a/cmake/mbgl.cmake
+++ b/cmake/mbgl.cmake
@@ -6,10 +6,6 @@ if (NOT MBGL_PLATFORM)
     endif()
 endif()
 
-if (NOT MASON_PLATFORM)
-    set(MASON_PLATFORM "${MBGL_PLATFORM}")
-endif()
-
 if(NOT EXISTS ${CMAKE_SOURCE_DIR}/node_modules/node-cmake/FindNodeJS.cmake)
     message(FATAL_ERROR "Can't find node-cmake")
 endif()
@@ -54,7 +50,7 @@ endfunction()
 # Run submodule update
 message(STATUS "Updating submodules...")
 execute_process(
-    COMMAND git submodule update --init .mason mapbox-gl-js
+    COMMAND git submodule update --init mapbox-gl-js
     WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}")
 
 if(NOT EXISTS "${CMAKE_SOURCE_DIR}/mapbox-gl-js/node_modules")
@@ -68,7 +64,7 @@ endif()
 # Add target for running submodule update during builds
 add_custom_target(
     update-submodules ALL
-    COMMAND git submodule update --init .mason mapbox-gl-js
+    COMMAND git submodule update --init mapbox-gl-js
     WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
     COMMENT "Updating submodules..."
 )