Very (very) simple maven artifact server written with Buildr and Sinatra

m2server.rb

require 'rubygems' if RUBY_VERSION < '1.9'
require 'sinatra'
require 'fileutils'
require 'buildr'

# The REPO_DIR variable should point to the same folder
# configured for the local artifact repository used by
# Buildr (a.k.a. the local maven repository).
REPO_DIR = dir=File.expand_path("#{ENV['TEMP']}/repo/")

# Fake up a build file. Identifies directory from which settings are loaded
Buildr.application.instance_variable_set("@rakefile",'./noexist')
Buildr.settings.build["repositories"] = {
  'local'=>REPO_DIR,
  "remote" => ['http://uk.maven.org/maven2','http://www.ibiblio.org/maven2/',"http://repo1.maven.org/maven2"]}


def search_for_artifact(spec)
  art=nil
  begin
    art=Buildr.artifact(spec)
	art.invoke unless art==nil
  rescue Exception => e
    puts e.message
  end
  art
end

# Test the artifact search.
# Should download the artifact if needed, and return the local path to the JAR file.
puts search_for_artifact('commons-cli:commons-cli:jar:1.0')
# Fake artifact, should not be found and return nil
puts search_for_artifact('nonexistant')
# exit

# Retrieves an artifact from the local repository
get '/*' do
  puts "\n#{params[:splat].join()}\n"
  
  complete_path=params[:splat].join()
  begin
    unless complete_path.include?('..')
      dir=File.expand_path("#{REPO_DIR}/#{File.dirname(complete_path)}")
      file_name=File.basename(complete_path)
	  complete_file="#{dir}/#{file_name}"
	  puts complete_file
      File.open("#{dir}/#{file_name}", 'rb') do |file|
	    if File::exists? file
		  content_type 'application/octet-stream'
		  attachment(file_name)
		  response.write(file.read)
	      file.close
		else
		  404
		end
      end
	else
      403
    end
  rescue Exception => e
    puts "Error reading artifact: #{e.message}"
	500
  end
end

# Unused, for debugging
post '/*' do
  puts "\n#{params[:splat].join(',')}\n"
end

# Upload a artifact to the local repository (deploy)
put '/*' do
  puts "\n#{params[:splat].join(',')}\n"
  
  complete_path=params[:splat].join()
  begin
    unless complete_path.include?('..')
	  dir=File.expand_path("#{REPO_DIR}/#{File.dirname(complete_path)}")
	  FileUtils.mkdir_p(dir)
      file_name=File.basename(complete_path)
	  complete_file="#{dir}/#{file_name}"
	  puts complete_file
      file=File.new(complete_file, 'w+b') 
      file.write(request.body.read)
	  file.close
	  200
	else
      403
    end
  rescue Exception => e
    puts "Error saving artifact: #{e.message}"
	500
  end
end

The REPO_DIR variable should point to the same folder configured for the local artifact repository used by Buildr (local maven repository).