Module: Dkit::Container

Defined in:
lib/dkit/container.rb

Class Method Summary collapse

Class Method Details

.cwd(project_root, workspace) ⇒ Object 



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# File 'lib/dkit/container.rb', line 64

def cwd(project_root, workspace)
  rel = Pathname.new(Dir.pwd).relative_path_from(Pathname.new(project_root)).to_s
  rel.start_with?("..") ? workspace : File.join(workspace, rel)
rescue ArgumentError
  workspace
end

.docker(*args, capture: false) ⇒ Object 



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# File 'lib/dkit/container.rb', line 9

def docker(*args, capture: false)
  cmd = ["docker", *args]
  if capture
    out = `#{cmd.map(&:shellescape).join(" ")} 2>/dev/null`.strip
    out.empty? ? nil : out
  else
    system(*cmd)
  end
end

.load_dc_config(project_root) ⇒ Object 



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# File 'lib/dkit/container.rb', line 19

def load_dc_config(project_root)
  raw = File.read(File.join(project_root, DC_CONFIG))
  raw = raw.gsub(%r{/\*.*?\*/}m, "").gsub(%r{//[^\n]*}, "")
  JSON.parse(raw)
end

.resolve_name(project_root, cfg) ⇒ Object 



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# File 'lib/dkit/container.rb', line 25

def resolve_name(project_root, cfg)
  service       = cfg["service"]
  compose_files = Array(cfg["dockerComposeFile"]).map do |f|
    File.expand_path(f, File.join(project_root, ".devcontainer"))
  end

  # Strategy A: container_name from compose YAML
  compose_files.each do |cf|
    next unless File.exist?(cf)
    data = YAML.safe_load(File.read(cf))
    name = data.dig("services", service, "container_name")
    return name if name
  end

  # Strategy B: docker label query
  project_name = File.basename(project_root).downcase.gsub(/[^a-z0-9]/, "")
  name = docker("ps",
    "--filter", "label=com.docker.compose.service=#{service}",
    "--filter", "label=com.docker.compose.project=#{project_name}",
    "--format", "{{.Names}}",
    capture: true
  )
  return name if name

  # Strategy C: docker compose ps -q
  first_file = compose_files.first
  if first_file && File.exist?(first_file)
    id = docker("compose", "-f", first_file, "ps", "-q", service, capture: true)
    return id if id
  end

  nil
end

.running?(name) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dkit/container.rb', line 59

def running?(name)
  status = docker("inspect", "--format", "{{.State.Status}}", name, capture: true)
  status == "running"
end