Class: TravisBundleCache::Cache

Inherits:
Object
  • Object
show all
Defined in:
lib/travis_bundle_cache/cache.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Cache

Returns a new instance of Cache.



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# File 'lib/travis_bundle_cache/cache.rb', line 6

def initialize
  @bucket_name         = ENV["AWS_S3_BUCKET"]
  @architecture        = `uname -m`.strip
  @file_name           = "#{ENV['BUNDLE_ARCHIVE']}-#{@architecture}.tgz"
  @file_path           = File.expand_path("~/#{@file_name}")
  @lock_file           = File.join(File.expand_path(ENV["TRAVIS_BUILD_DIR"]), "Gemfile.lock")
  @digest_filename     = "#{@file_name}.sha2"
  @old_digest_filename = File.expand_path("~/remote_#{@digest_filename}")
end

Instance Method Details

#archive_and_upload_bundle ⇒ Object 



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# File 'lib/travis_bundle_cache/cache.rb', line 38

def archive_and_upload_bundle
  if @old_digest == ""
    puts "=> There was no existing digest, uploading a new version of the archive"
  else
    puts "=> There were changes, uploading a new version of the archive"
    puts "  => Old checksum: #{@old_digest}"
    puts "  => New checksum: #{@bundle_digest}"

    puts "=> Cleaning old gem versions from the bundle"
    run_command "bundle clean"
  end

  puts "=> Preparing bundle archive"
  `cd ~ && tar -cjf "#{@file_name}" .bundle && split -b 5m -a 3 "#{@file_name}" "#{@file_name}."`

  parts_pattern = File.expand_path(File.join("~", "#{@file_name}.*"))
  parts         = Dir.glob(parts_pattern).sort

  puts "=> Uploading the bundle"
  puts "  => Beginning multipart upload"
  response  = storage.initiate_multipart_upload(@bucket_name, @file_name, { "x-amz-acl" => "public-read" })
  upload_id = response.body['UploadId']
  puts "    => Upload ID: #{upload_id}"

  part_ids = []

  puts "  => Uploading #{parts.length} parts"
  parts.each_with_index do |part, index|
    part_number = (index + 1).to_s
    puts "    => Uploading #{part}"
    File.open(part) do |part_file|
      response = storage.upload_part(@bucket_name, @file_name, upload_id, part_number, part_file)
      part_ids << response.headers['ETag']
      puts "      => Uploaded"
    end
  end

  puts "  => Completing multipart upload"
  storage.complete_multipart_upload(@bucket_name, @file_name, upload_id, part_ids)

  puts "=> Uploading the digest file"
  bucket = storage.directories.new(key: @bucket_name)
  bucket.files.create({
    :body         => @bundle_digest,
    :key          => @digest_filename,
    :public       => true,
    :content_type => "text/plain"
  })

  puts "All done now."
end

#cache_bundle ⇒ Object 



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# File 'lib/travis_bundle_cache/cache.rb', line 22

def cache_bundle
  puts "Checking for changes"
  @bundle_digest = Digest::SHA2.file(@lock_file).hexdigest
  @old_digest    = File.exists?(@old_digest_filename) ? File.read(@old_digest_filename) : ""

  if ENV['TRAVIS_PULL_REQUEST'].to_i > 0
    puts "=> This is a pull request, doing nothing"
  elsif ENV['TRAVIS_BRANCH'] != "master"
    puts "=> This is not the master branch, doing nothing"
  elsif @bundle_digest == @old_digest
    puts "=> There were no changes, doing nothing"
  else
    archive_and_upload_bundle
  end
end

#install ⇒ Object 



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# File 'lib/travis_bundle_cache/cache.rb', line 16

def install
  run_command %(cd ~ && wget -O "remote_#{@file_name}" "https://#{@bucket_name}.s3.amazonaws.com/#{@file_name}" && tar -xf "remote_#{@file_name}")
  run_command %(cd ~ && wget -O "remote_#{@file_name}.sha2" "https://#{@bucket_name}.s3.amazonaws.com/#{@file_name}.sha2")
  run_command %(bundle install --without #{ENV['BUNDLE_WITHOUT'] || "development production"} --path=~/.bundle)
end