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SVGJS_VERSION = '0.4'
# all available modules in the correct loading order
MODULES = %w[ svg element container fx event group arrange defs mask pattern gradient doc shape wrap rect ellipse poly path image text nested sugar ]
# how many bytes in a "kilobyte"
KILO = 1024
task :default => :dist
# module-aware file task
class BuildTask < Rake::FileTask
def modules
prerequisites.map { |f| File.basename(f, '.js') }
end
def remove_prerequisites to_remove
@prerequisites -= to_remove
return self
end
def needed?() super or modules_mismatch? end
def modules_mismatch?
previous_modules != modules
end
def previous_modules
first_line =~ / - ([\w,\s]+) - / && $1.split(/\W+/)
end
def first_line
File.open(name, 'r') { |f| f.gets }
end
end
BuildTask.define_task 'dist/svg.js' => MODULES.map {|m| "src/#{ m }.js" } do |task|
mkdir_p 'dist', :verbose => false
svgjs = ''
task.prerequisites.each do |src|
# bring in source files one by one, but without copyright info
copyright = true
File.open(src).each_line do |line|
copyright = false if copyright and line !~ %r{^(/|\s*$)}
svgjs << " #{ line }" unless copyright
end
svgjs << "\n\n"
end
File.open(task.name, 'w') do |file|
file.puts "/* svg.js %s - %s - svgjs.com/license */" % [version_string, task.modules.join(' ')]
file.puts '(function() {'
file.puts "\n"
file.puts svgjs
file.puts '}).call(this);'
end
end
file 'dist/svg.min.js' => 'dist/svg.js' do |task|
require 'rubygems'
begin require 'uglifier'
rescue LoadError; fail "Uglifier not available: #{$!}"
else
File.open(task.name, 'w') do |min|
min << Uglifier.new.compile(File.read(task.prerequisites.first))
end
end
end
file 'dist/svg.min.gz' => 'dist/svg.min.js' do |task|
verbose false do
tmp_file = task.name.sub('.gz', '')
cp task.prerequisites.first, tmp_file
sh 'gzip', '--best', tmp_file
end
end
desc "Concatenate source files to build svg.js"
task :concat, [:modules] do |task, args|
modules = args[:modules].to_s.split(':')
toattrsdd, to_exclude = modules.partition {|m| m.sub!(/^(-)?(.+)/, 'src/\2.js'); !$1 }
Rake::Task['dist/svg.js'].
remove_prerequisites(to_exclude).enhance(toattrsdd).
invoke
end
desc "Generate svg.js distribution files and report size statistics"
task :dist => ['dist/svg.js', 'dist/svg.min.js', 'dist/svg.min.gz'] do |task|
orig_size, min_size, gz_size = task.prerequisites.map {|f| File.size(f) }
puts "Original version: %.3fk" % (orig_size.to_f / KILO)
puts "Minified: %.3fk" % (min_size.to_f / KILO)
puts "Minified and gzipped: %.3fk, compression factor %.3f" % [gz_size.to_f / KILO, orig_size.to_f / gz_size]
rm_f 'dist/svg.min.gz', :verbose => false
end
desc "List available modules"
task :modules do
Dir['src/**/*.js'].each do |file|
name = file.gsub(/^src\//,'').gsub(/.js$/,'')
puts name + (MODULES.include?(name) ? '*' : '')
end
puts "\n*included in default build"
end
task(:clean) { rm_rf 'dist' }
desc "Run tests with PhantomJS"
task :test do
sh 'script/test'
Rake::Task[:check_whitespace].invoke
end
desc "Strip trailing whitespace and ensure each file ends with a newline"
task :whitespace do
verbose false do
files = Dir['{src,test,examples}/**/*.{js,html}']
ruby(*%w'-p -i -e $_.sub!(/\s*\Z/,"\n")'.concat(files))
end
end
desc "Checks for trailing whitespace in source files and tests"
task :check_whitespace do
flunked = false
flunk = lambda {|file, num| flunked = true; puts "#{file}:#{num}" }
Dir['{src,test,examples}/**/*.{js,html}'].each do |file|
File.open(file, 'r') {|f| f.each_with_index {|ln, num| flunk.call(file, num + 1) if ln.chomp =~ /\s+$/ } }
end
fail if flunked
end
desc "Generate docco documentation from source files"
task :docco do
verbose false do
sh 'docco', *Dir['src/*.js']
end
end
# svg.js version number + git sha if available
def version_string
desc = `git describe --tags HEAD 2>&1`.chomp
if $?.success?
desc
else
suffix, dir = '', File.basename(Dir.pwd)
# detect git sha from directory name of GitHub zip/tarball
suffix = "-g#{$1}" if dir =~ /^wout-svg.js-([a-f0-9]{7,40})$/
SVGJS_VERSION + suffix
end
end
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