Parsing command line arguments via GetoptLong.
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dup.rb
140
dup.rb
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@ -2,6 +2,8 @@
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require 'yaml'
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require 'pp'
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require 'shellwords'
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require 'getoptlong'
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def get_sample(name="container")
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return <<~HEREDOC
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@ -49,75 +51,113 @@ def get_sample(name="container")
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HEREDOC
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end
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if ARGV[0]=="--sample"
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def action_sample
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puts get_sample
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exit 1
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end
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def action_help
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puts "-h, --help Show this help."
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puts "-n, --dry-run Don't execute any commands."
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puts "-s, --sample Outputs a sample yml file."
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puts "-c, --create Create a new container yml file."
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exit 1
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end
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def run(cmd, ignore_returnvalue=false)
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puts "+ #{cmd}"
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returnvalue = true
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returnvalue = system(cmd)
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returnvalue = $dry_run ? true : system(cmd)
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raise "Command returned a non-zero exit value." if returnvalue!=true && !ignore_returnvalue
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end
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if ARGV[0]=="--create"
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filename = ARGV[1]
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else
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filename = ARGV[0]
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end
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if filename==nil || filename==""
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raise "No name given."
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end
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file = "%s/%s.yml" % [ "/data/fabian/projects/dup", filename ]
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if ARGV[0]=="--create"
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def action_create(container, file)
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raise "File #{file} already exists" if File.exists?(file)
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File.open(file, "w") {|f| f.write(get_sample(filename))}
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File.open(file, "w") {|f| f.write(get_sample(container))}
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exec("joe #{file.shellescape}")
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exit 1 # will never be reached because exec replaces this process. But just in case... ;-)
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end
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raise "File #{file} not found." unless File.exists?(file)
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def action_run(container, file)
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raise "File #{file} not found." unless File.exists?(file)
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data = File.open(file, "r") {|f| YAML.load(f.read)}
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data = File.open(file, "r") {|f| YAML.load(f.read)}
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raise "Expected #{file} to define (at least) a container named #{filename}." unless data.has_key?(filename)
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raise "Expected #{file} to define (at least) a container named #{container}." unless data.has_key?(container)
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data.each do |key, data|
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if data["build"]
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(data["before_build"] || []).each{|cmd| run(cmd)}
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cmd = ["docker", "build", "-t", data["image"].shellescape, data["build"].shellescape]
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data.each do |key, data|
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if data["build"]
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(data["before_build"] || []).each{|cmd| run(cmd)}
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cmd = ["docker", "build", "-t", data["image"].shellescape, data["build"].shellescape]
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run(cmd.join(" "))
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(data["after_build"] || []).each{|cmd| run(cmd)}
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end
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(data["before_run"] || []).each{|cmd| run(cmd)}
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cmd = ["docker", "run"]
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data["interactive"] && cmd << "--tty" << "--interactive"
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data["detach"]===false || cmd << "--detach"
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data["remove"] && cmd << "--rm"
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cmd << "--name=#{(data["container_name"] || key).shellescape}"
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(data["ports"] || []).each {|p| cmd << "--publish" << p.to_s.shellescape}
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data["restart"] && cmd << "--restart=#{data["restart"].shellescape}"
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(data["environment"] || []).each {|key, val| cmd << "--env" << (val ? "#{key}=#{val.to_s.shellescape}" : key)}
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(data["volumes"] || []).each {|vol| cmd << "--volume" << vol.shellescape}
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data["mem_limit"] && cmd << "--memory=#{data["mem_limit"].shellescape}"
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(data["links"] || []).each {|link| cmd << "--link" << link.shellescape}
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data["stop_signal"] && cmd << "--stop-signal=#{data["stop_signal"].shellescape}"
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data["stop_grace_period"] && cmd << "--stop-timeout=#{data["stop_grace_period"].shellescape}"
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(data["devices"] || []).each {|dev| cmd << "--device" << dev.shellescape}
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cmd << data["image"].shellescape
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data["command"] && cmd << data["command"]
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run("docker rm -f #{(data["container_name"] || key).shellescape}", true)
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run(cmd.join(" "))
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(data["after_build"] || []).each{|cmd| run(cmd)}
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(data["after_run"] || []).each{|cmd| run(cmd)}
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end
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(data["before_run"] || []).each{|cmd| run(cmd)}
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cmd = ["docker", "run"]
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data["interactive"] && cmd << "--tty" << "--interactive"
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data["detach"]===false || cmd << "--detach"
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data["remove"] && cmd << "--rm"
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cmd << "--name=#{(data["container_name"] || key).shellescape}"
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(data["ports"] || []).each {|p| cmd << "--publish" << p.to_s.shellescape}
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data["restart"] && cmd << "--restart=#{data["restart"].shellescape}"
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(data["environment"] || []).each {|key, val| cmd << "--env" << (val ? "#{key}=#{val.to_s.shellescape}" : key)}
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(data["volumes"] || []).each {|vol| cmd << "--volume" << vol.shellescape}
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data["mem_limit"] && cmd << "--memory=#{data["mem_limit"].shellescape}"
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(data["links"] || []).each {|link| cmd << "--link" << link.shellescape}
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data["stop_signal"] && cmd << "--stop-signal=#{data["stop_signal"].shellescape}"
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data["stop_grace_period"] && cmd << "--stop-timeout=#{data["stop_grace_period"].shellescape}"
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(data["devices"] || []).each {|dev| cmd << "--device" << dev.shellescape}
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cmd << data["image"].shellescape
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data["command"] && cmd << data["command"]
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run("docker rm -f #{(data["container_name"] || key).shellescape}", true)
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run(cmd.join(" "))
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(data["after_run"] || []).each{|cmd| run(cmd)}
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end
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action = :run
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container = nil
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$dry_run = false
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opts = GetoptLong.new(
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[ '--sample', '-s', GetoptLong::NO_ARGUMENT ],
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[ '--create', '-c', GetoptLong::NO_ARGUMENT ],
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[ '--help', '-h', GetoptLong::NO_ARGUMENT ],
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[ '--dry-run', '-n', GetoptLong::NO_ARGUMENT ]
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)
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opts.each do |opt, arg|
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case opt
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when '--sample'
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action_sample
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when '--create'
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action = :create
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when '--help'
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action_help
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when '--dry-run'
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puts "Dry-run. Not going to execute any command."
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$dry_run = true
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end
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end
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container = ARGV.shift
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if container==nil || container==""
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raise "No container given."
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end
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file = "%s/%s.yml" % [ "/data/fabian/projects/dup", container ]
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if action == :create
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action_create(container, file)
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elsif action == :run
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action_run(container, file)
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end
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