Add --pull_gems option to minirake

minirake

@@ -317,6 +317,8 @@ class RakeApp
       "Require MODULE before executing rakefile."],
     ['--tasks',    '-T', GetoptLong::NO_ARGUMENT,
       "Display the tasks and dependencies, then exit."],
+    ['--pull_gems','-p', GetoptLong::NO_ARGUMENT,
+      "Pull all git mrbgems."],
     ['--trace',    '-t', GetoptLong::NO_ARGUMENT,
       "Turn on invoke/execute tracing."],
     ['--usage',    '-h', GetoptLong::NO_ARGUMENT,
@@ -401,6 +403,8 @@ class RakeApp
       require value
     when '--tasks'
       $show_tasks = true
+    when '--pull_gems'
+      $pull_gems = true
     when '--trace'
       $trace = true
     when '--usage'
@@ -419,6 +423,7 @@ class RakeApp
   # Read and handle the command line options.
   def handle_options
     $verbose = false
+    $pull_gems = false
     opts = GetoptLong.new(*command_line_options)
     opts.each { |opt, value| do_option(opt, value) }
   end

tasks/mruby_build_commands.rake

@@ -220,19 +220,28 @@ module MRuby
 
   class Command::Git < Command
     attr_accessor :flags
-    attr_accessor :clone_options
+    attr_accessor :clone_options, :pull_options
 
     def initialize(build)
       super
       @command = 'git'
       @flags = []
       @clone_options = "clone %{flags} %{url} %{dir}"
+      @pull_options = "pull"
     end
 
     def run_clone(dir, url, _flags = [])
       _pp "GIT", url, dir.relative_path
       _run clone_options, { :flags => [flags, _flags].flatten.join(' '), :url => url, :dir => filename(dir) }
     end
+
+    def run_pull(dir, url)
+      root = Dir.pwd
+      Dir.chdir dir
+      _pp "GIT PULL", url, dir.relative_path
+      _run pull_options
+      Dir.chdir root
+    end
   end
 
   class Command::Mrbc < Command

tasks/mruby_build_gem.rake

@@ -40,13 +40,19 @@ module MRuby
       elsif params[:git]
         url = params[:git]
         gemdir = "build/mrbgems/#{url.match(/([-\w]+)(\.[-\w]+|)$/).to_a[1]}"
-        return gemdir if File.exists?(gemdir)
 
+        if File.exists?(gemdir)
+          if $pull_gems
+            git.run_pull gemdir, url
+          else
+            gemdir
+          end 
+        else
           options = [params[:options]] || []
           options << "--branch \"#{params[:branch]}\"" if params[:branch]
-
           FileUtils.mkdir_p "build/mrbgems"
           git.run_clone gemdir, url, options
+        end
       else
         fail "unknown gem option #{params}"
       end