Class: Building

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

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app_name, tag, options = {}) ⇒ Building

Returns a new instance of Building.



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# File 'lib/building.rb', line 9

def initialize(app_name, tag, options={})
  @app_name = app_name
  @tag = tag || "latest"
  @buildpack_url = options[:buildpack_url]
  @includes = options[:includes]
  @file = options[:file]
  @from = options[:from]
  @fig = options[:fig]
  @port = options[:port]

  create_dockerfile
  build_container

  if @port
    run_container(@port)
  else
    explain_container(8080)
  end

  if @fig
    build_fig
  end

  exit 0
end

Class Method Details

.convert(app_name, tag, options = {}) ⇒ Object 



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# File 'lib/building.rb', line 5

def self.convert(app_name, tag, options={})
  Building.new(app_name, tag, options)
end

Instance Method Details

#build_container ⇒ Object 



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# File 'lib/building.rb', line 84

def build_container
  pid = fork { exec "docker build -t #{@app_name}:#{@tag} ." }
  Process.waitpid(pid)
end

#build_fig ⇒ Object 



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# File 'lib/building.rb', line 70

def build_fig
  File.open(@fig , "w") do |file|
    file << <<-eof
web:
image: #{@app_name}:#{@tag}
command: /start web
environment:
  PORT: #{@port || 8080}
ports:
 - #{@port || 8080}
eof
  end
end

#create_dockerfile ⇒ Object 



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# File 'lib/building.rb', line 35

def create_dockerfile
  File.open("Dockerfile" , "w") do |file|
    file << "FROM #{@from || "ctlc/buildstep:ubuntu13.10"}\n"
  end

  if @buildpack_url
    File.open("Dockerfile" , "a") do |file|
      file << <<-eof
RUN git clone --depth 1 #{@buildpack_url} /build/buildpacks/#{@buildpack_url.split("/").last.sub(".git","")}
RUN echo #{@buildpack_url} >> /build/buildpacks.txt
eof
    end
  end

  if @includes
    File.open("Dockerfile" , "a") do |file|
      file << "RUN #{@includes}\n"
    end
  end

  if @file
    File.open("Dockerfile" , "a") do |file|
      file << IO.read(@file)
    end
  end

  File.open("Dockerfile" , "a") do |file|
    file << <<-eof
ADD . /app
RUN /build/builder
CMD /start web
eof
  end
end

#explain_container(port) ⇒ Object 



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# File 'lib/building.rb', line 89

def explain_container(port)
  run = "docker run -d -p #{port} -e \"PORT=#{port}\" #{@app_name}:#{@tag}"
  puts "\nTo run your app, try something like this:\n\n\t#{run}\n\n"
end

#run_container(port) ⇒ Object 



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# File 'lib/building.rb', line 94

def run_container(port)
  run = "\ndocker run -d -p #{port} -e \"PORT=#{port}\" #{@app_name}:#{@tag}"
  puts "#{run}"
  exec run
end