X-Git-Url: http://git.code-monkey.de/?p=ruby-ecore.git;a=blobdiff_plain;f=rake%2Fextensiontask.rb;fp=rake%2Fextensiontask.rb;h=ae3901cefbadf9ee7ad9b850c4d25dd5165cd828;hp=0000000000000000000000000000000000000000;hb=087974f38a80e4052d828562c01cdb44eacd3bf5;hpb=35069ec1047caf040c2adc1d39c464cbb6df3ed0

diff --git a/rake/extensiontask.rb b/rake/extensiontask.rb
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+++ b/rake/extensiontask.rb
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+require 'rake'
+require 'rake/clean'
+require 'rake/tasklib'
+
+module Rake
+
+  # Create a build task that will generate a Ruby extension (e.g. .so) from one or more
+  # C (.c) or C++ (.cc, .cpp, .cxx) files, and is intended as a replcaement for mkmf.
+  # It determines platform-specific settings (e.g. file extensions, compiler flags, etc.)
+  # from rbconfig (note: examples assume *nix file extensions).
+  #
+  # *Note*: Strings vs Symbols
+  # In places where filenames are expected (e.g. lib_name and objs), Strings are used
+  # as verbatim filenames, while, Symbols have the platform-dependant extension
+  # appended (e.g. '.so' for libraries and '.o' for objects).  Also, only Symbols
+  # have #dir prepended to them.
+  #
+  # Example:
+  #   desc "build sample extension"
+  #   # build sample.so (from foo.{c,cc,cxx,cpp}, through foo.o)
+  #   Rake::ExtensionTask.new :sample => :foo do |t|
+  #     # all extension files under this directory
+  #     t.dir = 'ext'
+  #     # link libraries (libbar.so)
+  #     t.link_libs << 'bar'
+  #   end
+  #
+  # Author::    Steve Sloan (mailto:steve@finagle.org)
+  # Copyright:: Copyright (c) 2006 Steve Sloan
+  # License::   GPL
+
+  class ExtensionTask < Rake::TaskLib
+    # The name of the extension
+    attr_accessor :name
+
+    # The filename of the extension library file (e.g. 'extension.so')
+    attr_accessor :lib_name
+
+    # Object files to build and link into the extension.
+    attr_accessor :objs
+
+    # The directory where the extension files (source, output, and
+    # intermediate) are stored.
+    attr_accessor :dir
+
+    # Environment configuration -- i.e. CONFIG from rbconfig, with a few other
+    # settings, and converted to lowercase-symbols.
+    attr_accessor :env
+
+    # Additional link libraries
+    attr_accessor :link_libs
+
+    # Same arguments as Rake::define_task
+    def initialize( args, &blk )
+      @env = @@DefaultEnv.dup
+      @name, @objs = resolve_args(args)
+      set_defaults
+      yield self  if block_given?
+      define_tasks
+    end
+
+    # Generate default values.  This is called from initialize _before_ the
+    # yield block.
+    #
+    # Defaults:
+    # - lib_name: name.so
+    # - objs: name.o (<- name.{c,cxx,cpp,cc})
+    # - dir: .
+    # - link_libs: <none>
+    def set_defaults
+      @lib_name ||= name.to_sym
+      @objs ||= [name.to_sym]
+      @dir ||= '.'
+      @link_libs ||= []
+    end
+
+    # Defines the library task.
+    def define_tasks
+      output_objs = @objs.collect { |obj| filepath obj, :objext }
+      output_lib = filepath lib_name, :dlext
+
+      task name => output_lib
+
+      file output_lib => output_objs do |t|
+        sh_cmd :ldshared, :dldflags, :ldflags,
+               {'-L' => :libdirs}, '-o', output_lib,
+               output_objs.join(' '),
+               link_libs.join(' '),
+               :libs, :dldlibs, :librubyarg_shared
+      end
+
+      CLEAN.include output_objs
+      CLOBBER.include output_lib
+      define_rules
+    end
+
+    # Defines C and C++ source-to-object rules, using the source extensions from env.
+    def define_rules
+      for ext in env[:c_exts]
+        Rake::Task.create_rule '.'+env[:objext] => '.'+ext do |r|
+          sh_cmd :cc, :cflags, :cppflags, {'-D' => :defines}, {'-I' => :includedirs}, {'-I' => :topdir}, {'-I' => :sitearchdir},
+                '-c', '-o', r.name, r.sources
+        end
+      end
+
+      for ext in env[:cpp_exts]
+        Rake::Task.create_rule '.'+env[:objext] => '.'+ext do |r|
+          sh_cmd :cxx, :cxxflags, :cppflags, {'-D' => :defines}, {'-I' => :includedirs}, {'-I' => :topdir}, {'-I' => :sitearchdir},
+                '-o', r.name, '-c', r.sources
+        end
+      end
+    end
+
+    class << self
+      # The default environment for all extensions.
+      @@DefaultEnv = {}
+      def env
+        @@DefaultEnv
+      end
+      def env=(e)
+        @@DefaultEnv = e
+      end
+
+      Config::CONFIG.merge(ENV).each { |k, v| @@DefaultEnv[k.downcase.to_sym] = v }
+      @@DefaultEnv = {
+        :cxx => 'c++',
+        :cxxflags => '',
+        :c_exts => ['c'],
+        :cpp_exts => ['cc', 'cxx', 'cpp'],
+        :includedirs => [],
+        :libdirs => [],
+      }.update(@@DefaultEnv)
+    end
+
+  protected
+
+    # Handles convenience filenames:
+    # * f (String) => f
+    # * f (Symbol) => dir/f.ext
+    def filepath( f, ext )
+      ext = env[ext]  if Symbol === ext
+      Symbol === f ? File.join( dir, "#{f}.#{ext}" ) : f
+    end
+
+    # Convenience function for cnstructing command lines for build tools.
+    def optify( *opts )
+      return optify(*opts.first)  if opts.size == 1 and opts.first.kind_of? Array
+      opts.collect do |opt|
+        case opt
+          when String then  opt
+          when Symbol then  optify env[opt]
+          when Hash
+            opt.collect do |k, v|
+              v = env[v]  if v.kind_of? Symbol
+              if v.kind_of? Array
+                optify v.collect { |w| k.to_s + w.to_s }
+              elsif v
+                k.to_s + v.to_s
+              end
+            end
+          else
+            opt.to_s
+        end
+      end.join(' ').squeeze(' ')
+    end
+
+    def sh_cmd( cmd, *opts )
+      sh optify( cmd, *opts )
+    end
+
+    # For some reason, Rake::TaskManager.resolve_args can't be found, so snarf it.
+    def resolve_args(args)
+      case args
+      when Hash
+        fail "Too Many Task Names: #{args.keys.join(' ')}" if args.size > 1
+        fail "No Task Name Given" if args.size < 1
+        task_name = args.keys[0]
+        deps = args[task_name]
+        deps = [deps] if (String===deps) || (Regexp===deps) || (Proc===deps)
+      else
+        task_name = args
+        deps = []
+      end
+      [task_name, deps]
+    end
+
+  end
+
+end