Class: Retag::Image

Inherits:
Object
  • Object
show all
Includes:
Utils
Defined in:
lib/retag/image.rb

Constant Summary collapse

MANIFEST_CONTENT_TYPE = 
'application/vnd.docker.distribution.manifest.v2+json'

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Utils

#cmd!, #dockerauth

Constructor Details

#initialize(image, tag, suffix: nil, api: nil) ⇒ Image

Returns a new instance of Image.



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# File 'lib/retag/image.rb', line 10

def initialize(image, tag, suffix: nil, api: nil)
  @image = image
  @tag = tag
  @tag = "#{@tag}-#{suffix}" if suffix.present?
  @full = "#{@image}:#{@tag}"
  @api = api

  @uri = ::URI.parse("https://#{@image}").normalize
  @repo = @uri.path
  @repo[0..0] = ''
  @uri.path = ''
end

Instance Attribute Details

#api ⇒ Object (readonly)

Returns the value of attribute api.



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# File 'lib/retag/image.rb', line 8

def api
  @api
end

#full ⇒ Object (readonly)

Returns the value of attribute full.



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# File 'lib/retag/image.rb', line 8

def full
  @full
end

#image ⇒ Object (readonly)

Returns the value of attribute image.



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# File 'lib/retag/image.rb', line 8

def image
  @image
end

#repo ⇒ Object (readonly)

Returns the value of attribute repo.



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# File 'lib/retag/image.rb', line 8

def repo
  @repo
end

#tag ⇒ Object (readonly)

Returns the value of attribute tag.



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# File 'lib/retag/image.rb', line 8

def tag
  @tag
end

#uri ⇒ Object (readonly)

Returns the value of attribute uri.



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# File 'lib/retag/image.rb', line 8

def uri
  @uri
end

Instance Method Details

#get_manifest ⇒ Object 



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# File 'lib/retag/image.rb', line 61

def get_manifest
  manifest = JSON.parse(cmd!("curl -s -u '#{dockerauth(uri.host)}' -H 'Accept: #{MANIFEST_CONTENT_TYPE}' '#{uri}/v2/#{repo}/manifests/#{tag}' -o -", capture: true).strip)
  unless manifest.dig('layers') || manifest.dig('config') || manifest.dig('manifests')
    raise manifest.inspect
  end

  manifest
end

#retag!(newtag = tag, newproject: nil) ⇒ Object 



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# File 'lib/retag/image.rb', line 25

def retag!(newtag = tag, newproject: nil)
  project, *_rest = repo.split('/')
  registry = repo
  newrepo = "#{newproject}/#{registry}"

  Tempfile.create('manifest') do |file|
    manifest = get_manifest
    file.write(manifest.to_json)
    file.flush

    if newtag.to_s.strip != tag.to_s.strip
      result = cmd!("curl -s -u '#{dockerauth(uri.host)}' -H 'Content-Type: #{MANIFEST_CONTENT_TYPE}' -H 'Accept: #{MANIFEST_CONTENT_TYPE}' -X PUT --data-binary @#{file.path} '#{uri}/v2/#{repo}/manifests/#{newtag}' -o -", capture: true).strip
      raise result unless result.empty?
    end

    if newproject && project != newproject
      unless api == 'harbor'
        raise "Unable to promote image #{repo} -> #{newrepo} with #{api.inspect} api: Unimplemented"
      end

      newregistry = registry.split('/').join('-')
      newrepo = "#{newproject}/#{newregistry}"
      
      result = cmd!(
        "curl -s -u '#{dockerauth(uri.host)}' -X POST '#{uri}/api/v2.0/projects/#{newproject}/repositories/#{newregistry}/artifacts?from=#{repo}:#{newtag}' -o -", capture: true
      ).strip
    end

    raise result unless result.empty?
  end

  newuri = uri.dup
  newuri.path = "/#{newrepo}".gsub('//', '/')
  Image.new(newuri.hostname + newuri.path, newtag)
end