Class: PgMigrate::Package

Inherits:
Object
  • Object
show all
Defined in:
lib/pg_migrate/package.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(manifest_reader) ⇒ Package

Returns a new instance of Package.



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# File 'lib/pg_migrate/package.rb', line 18

def initialize(manifest_reader)
  @log = Logging.logger[self]
  @manifest_reader = manifest_reader
  @template_dir = File.join(File.dirname(__FILE__), 'package_templates')
end

Instance Attribute Details

#manifest_reader ⇒ Object

Returns the value of attribute manifest_reader.



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# File 'lib/pg_migrate/package.rb', line 16

def manifest_reader
  @manifest_reader
end

Instance Method Details

#build_gem(gemspec_path, output_dir) ⇒ Object 



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# File 'lib/pg_migrate/package.rb', line 98

def build_gem(gemspec_path, output_dir)
  @log.debug "building gem"

  @log.debug "loading gem specification #{gemspec_path}"
  spec = Gem::Specification.load(gemspec_path)

  if spec.nil?
    raise 'unable to build gem from specification'
  end
  
  @log.debug "packaging gem"
  Dir.chdir(output_dir) do
    if defined?(Gem::Builder)
      Gem::Builder.new(spec).build
    else
      Gem::Package.build(spec)
    end
  end
  #Gem::Package.build spec, false
end

#copy_schema(built_migration_path, output_dir) ⇒ Object 



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# File 'lib/pg_migrate/package.rb', line 94

def copy_schema(built_migration_path, output_dir)
  FileUtils.cp_r(File.join(built_migration_path, '.'), output_dir)
end

#create_gem(built_migration_path, output_dir, name, version, force) ⇒ Object 



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# File 'lib/pg_migrate/package.rb', line 29

def create_gem (built_migration_path, output_dir, name, version, force)
  # validate that manifest is valid
  @log.debug "validating output dir is manifest"

  if !FileTest::exist?(built_migration_path)
    raise "built manifest path does not exist #{built_migration_path}"
  end

  if built_migration_path == output_dir
    raise "source and destination can not be the same path"
  end

  loaded_manifest = @manifest_reader.load_input_manifest(built_migration_path)
  @manifest_reader.validate_migration_paths(built_migration_path, loaded_manifest)

  @log.debug "preparing to build gem"

  target = File.join(output_dir, name)

  # stolen almost verbatim from bundler: https://github.com/carlhuda/bundler/blob/master/lib/bundler/cli.rb
  constant_name = name.split('_').map { |p| p[0..0].upcase + p[1..-1] }.join
  constant_name = constant_name.split('-').map { |q| q[0..0].upcase + q[1..-1] }.join('::') if constant_name =~ /-/
  constant_array = constant_name.split('::')
  # end stolen

  author = "pgmigrate"
  email = "[email protected]"
  pg_migrate_version = PgMigrate::VERSION
  gemfiles = ["Gemfile", "#{name}.gemspec", "lib/#{name}.rb", "lib/#{name}/version.rb", "bin/#{name}"]
  gemfiles += userfiles(built_migration_path, name)
  gemspec_path = File.join(output_dir, "#{name}.gemspec")

  @log.debug "building gem"

  output = Pathname.new(output_dir)
  if !output.exist?
    if !force
      raise "Output directory '#{output_dir}' does not exist.  Create it or specify force=true"
    else
      output.mkpath
    end
  else
    # verify that it's is a directory
    if !output.directory?
      raise "output_dir #{output_dir} is a file; not a directory."
    else
      @log.debug("deleting & recreating existing output_dir #{output_dir}")
      output.rmtree
      output.mkpath
    end
  end

  FileUtils.mkdir_p(output_dir)
  FileUtils.mkdir_p(File.join(output_dir, "bin"))
  FileUtils.mkdir_p(File.join(output_dir, "lib", name))
  run_template("Gemfile.erb", binding, File.join(output_dir, "Gemfile"))
  run_template("gemspec.erb", binding, gemspec_path)
  run_template("lib/gem.rb", binding, File.join(output_dir, "lib", "#{name}.rb"))
  run_template("lib/gem/version.rb", binding, File.join(output_dir, "lib", name, "version.rb"))
  run_template("bin/migrate.rb", binding, File.join(output_dir, "bin", "#{name}"))
  copy_schema(built_migration_path, File.join(output_dir, "lib", name, "schemas"))

  return gemspec_path
end

#package(built_migration_path, output_dir, name, version, options = {:force=>true}) ⇒ Object 



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# File 'lib/pg_migrate/package.rb', line 24

def package(built_migration_path, output_dir, name, version, options={:force=>true})
  gemspec = create_gem(built_migration_path, output_dir, name, version, options[:force])
  build_gem(gemspec, output_dir)
end

#run_template(template, opt, output_filepath) ⇒ Object

given an input template and binding, writes to an output file



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# File 'lib/pg_migrate/package.rb', line 138

def run_template(template, opt, output_filepath)
  bootstrap_template = nil
  File.open(File.join(@template_dir, template), 'r') do |reader|
    bootstrap_template   = reader.read
  end


  template = ERB.new(bootstrap_template, 0, "%<>")
  content = template.result(opt)
  File.open(output_filepath, 'w') do |writer|
    writer.syswrite(content)
  end
end

#userfiles(built_migration_path, name) ⇒ Object 



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# File 'lib/pg_migrate/package.rb', line 119

def userfiles(built_migration_path, name)

  gempaths = []
  Find.find(built_migration_path) do |path|
    if path == ".."
      Find.prune
    else
      # make relative

      relative = path[built_migration_path.length..-1]
      gempath = File.join("lib", name, "schemas", relative)
      gempaths.push(gempath)
    end
  end

  return gempaths
end