Module: Ec2Select

Defined in:
lib/ec2_select.rb

Defined Under Namespace

Classes: NoEctwoFile

Constant Summary collapse

ECTWOS_FILE = 
File.expand_path('~/.ec2-select')

Instance Method Summary collapse

Instance Method Details

#cert(profile) ⇒ Object 



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# File 'lib/ec2_select.rb', line 36

def cert(profile)
  "#{pempath}/cert-#{profile}.pem"
end

#pempath ⇒ Object 



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# File 'lib/ec2_select.rb', line 17

def pempath
  ENV['EC2_PEMFILES'] ? File.expand_path(ENV['EC2_PEMFILES']) : File.expand_path('~/.ec2')
end

#private_key(profile) ⇒ Object 



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# File 'lib/ec2_select.rb', line 32

def private_key(profile)
  "#{pempath}/pk-#{profile}.pem"
end

#rewrite(profile) ⇒ Object 



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# File 'lib/ec2_select.rb', line 40

def rewrite(profile)
  # Validation
  if profile !~ /[A-Za-z0-9\.\-_~+=]/
    raise "Uh Oh!  Profile can only have valid filename characters!"
  end
  if !File.exist? private_key(profile)
    raise "Private key #{private_key(profile)} does not exist!"
  end
  if !File.exist? cert(profile)
    raise "Cert #{cert(profile)} does not exist!"
  end

  # Content
  content = "# Dynamically created by ec2-select\n"
  content << "# Currently PROFILE=#{profile}\n\n"
  content << case shell
  when /bash|.?sh/
    "export EC2_PRIVATE_KEY=\"#{private_key(profile)}\"\n" +
    "export EC2_CERT=\"#{cert(profile)}\"\n"
  when /.?csh/
    "setenv EC2_PRIVATE_KEY \"#{private_key(profile)}\"\n" +
    "setenv EC2_CERT \"#{cert(profile)}\"\n"
  else
    $stderr.puts "Unknown shell `#{shell}'"
    exit 1
  end
  

  File.open(ECTWOS_FILE, 'w') {|f| f.write(content) }

  "IMPORTANT!!! You need re-source if you want to use #{profile}\n" +
  "in this terminal session!  This should do the trick:\n" +
  "\n  source #{ECTWOS_FILE}\n\n" +
  "Any new terminal sessions will use this profile as long as you\n" +
  "have 'source #{ECTWOS_FILE}' in your ~/.profile or\n" +
  "~/.bashrc, ~/.bash_profile (or similar)."
end

#rewrite_or_show(profile = nil) ⇒ Object 



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# File 'lib/ec2_select.rb', line 7

def rewrite_or_show(profile=nil)
  return show if profile.nil?
  rewrite(profile) unless profile.nil?
end

#shell ⇒ Object 



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# File 'lib/ec2_select.rb', line 21

def shell
  unless const_defined? 'SHELL'
    begin
      require File.expand_path('~/.ec2-select')
    rescue LoadError
      const_set("SHELL", 'bash')
    end
  end
  SHELL
end

#show ⇒ Object 



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# File 'lib/ec2_select.rb', line 12

def show
  current = ENV['EC2_PRIVATE_KEY'].gsub(/.*pk-(.*)\.pem$/, '\\1')
  "Your current profile is: #{current}"
end