Module: RbSys::Mkmf

Defined in:
lib/rb_sys/mkmf.rb,
lib/rb_sys/mkmf/config.rb

Overview

Helper class for creating Rust Makefiles

Defined Under Namespace

Classes: Config

Constant Summary collapse

GLOBAL_RUSTFLAGS = 
["--cfg=rb_sys_gem"]

Instance Method Summary collapse

Instance Method Details

#create_rust_makefile(target) {|builder| ... } ⇒ Object

Helper for building Rust extensions by creating a Ruby compatible makefile for Rust. By using this class, your rust extension will be 100% compatible with the rake-compiler gem, which allows for easy cross compilation.

. require ‘rb_sys/mkmf’

. create_rust_makefile(“my_extension”) #=> Generate a Makefile in the current directory

. require ‘rb_sys/mkmf’

. create_rust_makefile(“my_extension”) do |r| . # All of these are optional . r.env = { ‘FOO’ => ‘bar’ } . r.profile = ENV.fetch(‘RB_SYS_CARGO_PROFILE’, :dev).to_sym . r.features = %w . end

Examples:

Basic

require 'mkmf'

Configure a custom build profile

require 'mkmf'

Yields:

  • (builder) 


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# File 'lib/rb_sys/mkmf.rb', line 35

def create_rust_makefile(target, &blk)
  if target.include?("/")
    target_prefix, target = File.split(target)
    target_prefix[0, 0] = "/"
  else
    target_prefix = ""
  end

  spec = Struct.new(:name, :metadata).new(target, {})
  cargo_builder = CargoBuilder.new(spec)
  builder = Config.new(cargo_builder)

  yield builder if blk

  srcprefix = "$(srcdir)/#{builder.ext_dir}".chomp("/")
  RbConfig.expand(srcdir = srcprefix.dup)

  full_cargo_command = cargo_command(srcdir, builder)

  make_install = +"    \#{conditional_assign(\"RB_SYS_BUILD_DIR\", File.join(Dir.pwd, \".rb-sys\"))}\n    \#{conditional_assign(\"CARGO\", \"cargo\")}\n    \#{conditional_assign(\"CARGO_BUILD_TARGET\", builder.target)}\n    \#{conditional_assign(\"SOEXT\", builder.so_ext)}\n\n    # Determine the prefix Cargo uses for the lib.\n    \#{if_neq_stmt(\"$(SOEXT)\", \"dll\")}\n    \#{conditional_assign(\"SOEXT_PREFIX\", \"lib\", indent: 1)}\n    \#{endif_stmt}\n\n    \#{conditional_assign(\"RB_SYS_CARGO_PROFILE\", builder.profile)}\n    \#{conditional_assign(\"RB_SYS_CARGO_FEATURES\", builder.features.join(\",\"))}\n    \#{conditional_assign(\"RB_SYS_GLOBAL_RUSTFLAGS\", GLOBAL_RUSTFLAGS.join(\" \"))}\n    \#{conditional_assign(\"RB_SYS_EXTRA_RUSTFLAGS\", builder.extra_rustflags.join(\" \"))}\n\n    # Set dirname for the profile, since the profiles do not directly map to target dir (i.e. dev -> debug)\n    \#{if_eq_stmt(\"$(RB_SYS_CARGO_PROFILE)\", \"dev\")}\n    \#{conditional_assign(\"RB_SYS_CARGO_PROFILE_DIR\", \"debug\", indent: 1)}\n    \#{else_stmt}\n    \#{conditional_assign(\"RB_SYS_CARGO_PROFILE_DIR\", \"$(RB_SYS_CARGO_PROFILE)\", indent: 1)}\n    \#{endif_stmt}\n\n    # Set the build profile (dev, release, etc.) Compat with Rust 1.51.\n    \#{if_eq_stmt(\"$(RB_SYS_CARGO_PROFILE)\", \"release\")}\n    \#{assign_stmt(\"RB_SYS_CARGO_PROFILE_FLAG\", \"--release\", indent: 1)}\n    \#{else_stmt}\n    \#{assign_stmt(\"RB_SYS_CARGO_PROFILE_FLAG\", \"--profile $(RB_SYS_CARGO_PROFILE)\", indent: 1)}\n    \#{endif_stmt}\n\n    # Account for sub-directories when using `--target` argument with Cargo\n    \#{if_neq_stmt(\"$(CARGO_BUILD_TARGET)\", \"\")}\n    \#{assign_stmt(\"RB_SYS_CARGO_BUILD_TARGET_DIR\", \"target/$(CARGO_BUILD_TARGET)\", indent: 1)}\n    \#{else_stmt}\n    \#{assign_stmt(\"RB_SYS_CARGO_BUILD_TARGET_DIR\", \"target\", indent: 1)}\n    \#{endif_stmt}\n\n    target_prefix = \#{target_prefix}\n    TARGET_NAME = \#{target[/\\A\\w+/]}\n    TARGET_ENTRY = \#{RbConfig::CONFIG[\"EXPORT_PREFIX\"]}Init_$(TARGET_NAME)\n    RUBYARCHDIR   = $(sitearchdir)$(target_prefix)\n    TARGET = \#{target}\n    DLLIB = $(TARGET).\#{RbConfig::CONFIG[\"DLEXT\"]}\n    TARGET_DIR = \#{Dir.pwd}/$(RB_SYS_CARGO_BUILD_TARGET_DIR)/$(RB_SYS_CARGO_PROFILE_DIR)\n    RUSTLIB = $(TARGET_DIR)/$(SOEXT_PREFIX)$(TARGET_NAME).$(SOEXT)\n\n    CLEANOBJS = $(TARGET_DIR)/.fingerprint $(TARGET_DIR)/incremental $(TARGET_DIR)/examples $(TARGET_DIR)/deps $(TARGET_DIR)/build $(TARGET_DIR)/.cargo-lock $(TARGET_DIR)/*.d $(TARGET_DIR)/*.rlib $(RB_SYS_BUILD_DIR)\n    DEFFILE = $(TARGET_DIR)/$(TARGET)-$(arch).def\n    CLEANLIBS = $(DLLIB) $(RUSTLIB) $(DEFFILE)\n\n    \#{base_makefile(srcdir)}\n\n    \#{if_neq_stmt(\"$(RB_SYS_VERBOSE)\", \"\")}\n    \#{assign_stmt(\"Q\", \"$(0=@)\", indent: 1)}\n    \#{endif_stmt}\n\n    \#{env_vars(builder)}\n    \#{export_env(\"RUSTFLAGS\", \"$(RB_SYS_GLOBAL_RUSTFLAGS) $(RB_SYS_EXTRA_RUSTFLAGS) $(RUSTFLAGS)\")}\n\n    FORCE: ;\n\n    $(TARGET_DIR):\n    \\t$(ECHO) creating target directory \\\\($(@)\\\\)\n    \\t$(Q) $(MAKEDIRS) $(TARGET_DIR)\n\n    \#{deffile_definition}\n\n    \#{optional_rust_toolchain(builder)}\n\n    $(RUSTLIB): \#{deffile_definition ? \"$(DEFFILE) \" : nil}FORCE\n    \\t$(ECHO) generating $(@) \\\\(\"$(RB_SYS_CARGO_PROFILE)\"\\\\)\n    \\t$(Q) \#{full_cargo_command}\n\n    $(DLLIB): $(RUSTLIB)\n    \\t$(Q) $(COPY) \"$(RUSTLIB)\" $@\n\n    install-so: $(DLLIB)\n    \\t$(ECHO) installing $(DLLIB) to $(RUBYARCHDIR)\n    \\t$(Q) $(MAKEDIRS) $(RUBYARCHDIR)\n    \\t$(INSTALL_PROG) $(DLLIB) $(RUBYARCHDIR)\n\n    install: \#{builder.clean_after_install ? \"install-so realclean\" : \"install-so\"}\n\n    all: \#{$extout ? \"install\" : \"$(DLLIB)\"}\n  MAKE\n\n  gsub_cargo_command!(make_install, builder: builder)\n\n  File.write(\"Makefile\", make_install)\nend\n"