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# Build the tar.gz, tar.bz2, and .gem files for an RMagick Release

# To use: cd to $HOME
# run: rake -f path/to/build_tarball.rake clean
# rake -f path/to/build_tarball.rake release=tag beta=whatever
#
# Specify the release as release=RMagick_x-y-z or nothing if release=HEAD
# Specify a beta Release as beta=beta1

require 'rubygems'
require 'redcloth'
require 'find'
require 'fileutils'
include FileUtils


CVSSERVER = ":ext:rmagick@rubyforge.org/var/cvs/rmagick"


# CVS_Tag is the CVS tag for this release. Dist_Directory is CVS_Tag,
# modified for use as a directory name.
if ENV.include?("release")
  CVS_Tag = ENV["release"]
  Dist_Directory = CVS_Tag.tr('_-','-.')
else
  CVS_Tag = "HEAD"
  Dist_Directory = "RMagick-0.0.0"
end


# RMagick_Version is just X.Y.Z
RMagick_Version = Dist_Directory.sub(/RMagick-/, "")

# RMagick_Version2 is X.Y.Z + "-beta1" if beta=beta1
RMagick_Version2 = RMagick_Version + (ENV.include?("beta") ? "-" + ENV["beta"] : "")

# Release is RMagick-X.Y.Z, plus "-beta1" if beta=beta1
Release = Dist_Directory + (ENV.include?("beta") ? "-" + ENV["beta"] : "")

README = "README.html"
MANIFEST = "ext/RMagick/MANIFEST"




# Change the version number placeholders in a file.
# Returns an array of lines from the file.
def reversion(name)
  now = Time.new
  now = now.strftime("%m/%d/%y")

  lines = File.readlines name
  lines.each do |line|
    line.gsub!(%r{0\.0\.0\$}, RMagick_Version2)
    line.gsub!(%r{0\.0\.0}, RMagick_Version)
    line.gsub!(%r{YY/MM/DD}, now)
  end
  lines
end




# Rewrite a file containing embedded version number placeholders.
def reversion_file(name)
  lines = reversion(name)
  tmp_name = name + "_tmp"
  mv name, tmp_name
  begin
    File.open(name, "w") { |f| f.write lines }
  rescue
    mv tmp_name, name
  ensure
    rm tmp_name
  end
end




task :extconf do
  Dir.chdir(Dist_Directory) { reversion_file "ext/RMagick/extconf.rb" }
end




task :gemspec do
  Dir.chdir(Dist_Directory) { reversion_file "rmagick.gemspec" }
end




task "README.txt" do
  Dir.chdir Dist_Directory do
    reversion_file "README.rc"
    body = File.readlines "README.rc"
    body = RedCloth.new(body.join).to_html + "\n"
    File.open("README.txt", "w") { |f| f.write body }
  end
end




task README => "README.txt" do
  puts "writing #{README}"
  Dir.chdir Dist_Directory do
    File.open(README, "w") do |html|
      html.write <<END_HTML_HEAD
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>RMagick #{RMagick_Version2} README</title>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<meta name="GENERATOR" content="RedCloth">
</head>
<body>
END_HTML_HEAD
      html.write File.readlines("README.txt")
      html.write <<END_HTML_TAIL
</body>
</html>
END_HTML_TAIL
    end
  end
end




task :doc do
  Dir.chdir(File.join(Dist_Directory, "doc")) do
      FileList["*.html"].each { |d| reversion_file(d) }
  end
end




# Remove files we don't want in the tarball.
# Ensure files are not executable. (ref: bug #10080)
task :fix_files do
    Dir.chdir Dist_Directory do
        rm_rf "test", :verbose => true
        rm "lib/rvg/to_c.rb", :verbose => true
        rm "README.rc", :verbose => true
        rm "README.txt", :verbose => true
        chmod 0644, FileList["doc/*.html", "doc/ex/*.rb", "doc/ex/images/*", "examples/*.rb"]
    end
end




task :manifest do
  now = Time.new
  now = now.strftime("%H:%M:%S %m/%d/%y")
  puts "generating #{MANIFEST}"

  Dir.chdir Dist_Directory do
    File.open(MANIFEST, "w") do |f|
      f.puts "MANIFEST for #{Release} - #{now}\n\n"
      Find.find('.') do |name|
        next if File.directory? name
        f.puts name[2..-1] # remove leading "./"
      end
    end
  end
end




task :export do
  sh "cvs -d#{CVSSERVER} export -r #{CVS_Tag} -d #{Dist_Directory} RMagick"
end




task :collateral => [README, :gemspec, :extconf, :doc]

GEM = Dist_Directory.downcase + ".gem"

task :default => [:export, :collateral, :fix_files, :manifest] do
  sh "tar czf #{Release}.tar.gz #{Dist_Directory}"
  sh "tar cjf #{Release}.tar.bz2 #{Dist_Directory}"
  sh "tar c #{Release} | 7z a -t7z -m0=lzma -mx=9 -mfb=64 -ms=on -si#{Release}.tar #{Release}.tar.lzma"

  # Extract with
  # 7z e RMagick-x.y.z.tar.lzma -so | tar xv
  #sh "tar cf #{Release}.tar #{Dist_Directory}"
  #sh "7z a -t7z -m0=lzma -mx=9 -mfb=64 -md=32m -ms=on #{Release}.tar.lzma #{Release}.tar"
  #rm_rf Release+".tar", :verbose => true

  Dir.chdir(Dist_Directory) do
    sh "gem build rmagick.gemspec"
    mv GEM, "../", :verbose => true
  end
end




task :clean do
  rm_rf Dist_Directory, :verbose => true
  rm_rf Release+".tar.gz", :verbose => true
  rm_rf Release+".tar.bz2", :verbose => true
  rm_rf Release+".tar.lzma", :verbose => true
  rm_rf GEM, :verbose => true
end

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