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https://github.com/inspec/inspec
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84 lines
2.2 KiB
Ruby
84 lines
2.2 KiB
Ruby
#
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# Copyright 2017, Christoph Hartmann
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require "inspec/resources/docker"
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require_relative "docker_object"
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module Inspec::Resources
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class DockerImage < Inspec.resource(1)
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include Inspec::Resources::DockerObject
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name "docker_image"
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supports platform: "unix"
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desc ""
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example <<~EXAMPLE
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describe docker_image('alpine:latest') do
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it { should exist }
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its('id') { should_not eq '' }
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its('image') { should eq 'alpine:latest' }
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its('repo') { should eq 'alpine' }
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its('tag') { should eq 'latest' }
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end
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describe docker_image('alpine:latest') do
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it { should exist }
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end
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describe docker_image(id: '4a415e366388') do
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it { should exist }
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end
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EXAMPLE
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def initialize(opts = {})
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# do sanitizion of input values
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o = opts.dup
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o = { image: opts } if opts.is_a?(String)
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@opts = sanitize_options(o)
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end
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def image
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"#{repo}:#{tag}" if object_info.entries.size == 1
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end
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def repo
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object_info.repositories[0] if object_info.entries.size == 1
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end
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def tag
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object_info.tags[0] if object_info.entries.size == 1
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end
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def to_s
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img = @opts[:image] || @opts[:id]
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"Docker Image #{img}"
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end
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private
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def sanitize_options(opts)
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opts.merge!(parse_components_from_image(opts[:image]))
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# assume a "latest" tag if we don't have one
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opts[:tag] ||= "latest"
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# if the ID isn't nil and doesn't contain a hash indicator (indicated by the presence
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# of a colon, which separates the indicator from the actual hash), we assume it's sha256.
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opts[:id] = "sha256:" + opts[:id] unless opts[:id].nil? || opts[:id].include?(":")
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# Assemble/reassemble the image from the repo and tag
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opts[:image] = "#{opts[:repo]}:#{opts[:tag]}" unless opts[:repo].nil?
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# return the santized opts back to the caller
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opts
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end
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def object_info
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return @info if defined?(@info)
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opts = @opts
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@info = inspec.docker.images.where do
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(repository == opts[:repo] && tag == opts[:tag]) || (!id.nil? && !opts[:id].nil? && (id == opts[:id] || id.start_with?(opts[:id])))
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end
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end
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end
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end
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