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// Copyright 2018 The Grafeas Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

syntax = "proto3";

package grafeas.v1beta1.image;

option go_package = "cloud.google.com/go/containeranalysis/apiv1beta1/containeranalysispb;containeranalysispb";
option java_multiple_files = true;
option java_package = "io.grafeas.v1beta1.image";
option objc_class_prefix = "GRA";

// Layer holds metadata specific to a layer of a Docker image.
message Layer {
  // Instructions from Dockerfile.
  enum Directive {
    // Default value for unsupported/missing directive.
    DIRECTIVE_UNSPECIFIED = 0;

    // https://docs.docker.com/engine/reference/builder/
    MAINTAINER = 1;

    // https://docs.docker.com/engine/reference/builder/
    RUN = 2;

    // https://docs.docker.com/engine/reference/builder/
    CMD = 3;

    // https://docs.docker.com/engine/reference/builder/
    LABEL = 4;

    // https://docs.docker.com/engine/reference/builder/
    EXPOSE = 5;

    // https://docs.docker.com/engine/reference/builder/
    ENV = 6;

    // https://docs.docker.com/engine/reference/builder/
    ADD = 7;

    // https://docs.docker.com/engine/reference/builder/
    COPY = 8;

    // https://docs.docker.com/engine/reference/builder/
    ENTRYPOINT = 9;

    // https://docs.docker.com/engine/reference/builder/
    VOLUME = 10;

    // https://docs.docker.com/engine/reference/builder/
    USER = 11;

    // https://docs.docker.com/engine/reference/builder/
    WORKDIR = 12;

    // https://docs.docker.com/engine/reference/builder/
    ARG = 13;

    // https://docs.docker.com/engine/reference/builder/
    ONBUILD = 14;

    // https://docs.docker.com/engine/reference/builder/
    STOPSIGNAL = 15;

    // https://docs.docker.com/engine/reference/builder/
    HEALTHCHECK = 16;

    // https://docs.docker.com/engine/reference/builder/
    SHELL = 17;
  }

  // Required. The recovered Dockerfile directive used to construct this layer.
  Directive directive = 1;

  // The recovered arguments to the Dockerfile directive.
  string arguments = 2;
}

// A set of properties that uniquely identify a given Docker image.
message Fingerprint {
  // Required. The layer ID of the final layer in the Docker image's v1
  // representation.
  string v1_name = 1;

  // Required. The ordered list of v2 blobs that represent a given image.
  repeated string v2_blob = 2;

  // Output only. The name of the image's v2 blobs computed via:
  //   [bottom] := v2_blob[bottom]
  //   [N] := sha256(v2_blob[N] + " " + v2_name[N+1])
  // Only the name of the final blob is kept.
  string v2_name = 3;
}

// Basis describes the base image portion (Note) of the DockerImage
// relationship. Linked occurrences are derived from this or an
// equivalent image via:
//   FROM 
// Or an equivalent reference, e.g. a tag of the resource_url.
message Basis {
  // Required. Immutable. The resource_url for the resource representing the
  // basis of associated occurrence images.
  string resource_url = 1;

  // Required. Immutable. The fingerprint of the base image.
  Fingerprint fingerprint = 2;
}

// Details of an image occurrence.
message Details {
  // Required. Immutable. The child image derived from the base image.
  Derived derived_image = 1;
}

// Derived describes the derived image portion (Occurrence) of the DockerImage
// relationship. This image would be produced from a Dockerfile with FROM
// .
message Derived {
  // Required. The fingerprint of the derived image.
  Fingerprint fingerprint = 1;

  // Output only. The number of layers by which this image differs from the
  // associated image basis.
  int32 distance = 2;

  // This contains layer-specific metadata, if populated it has length
  // "distance" and is ordered with [distance] being the layer immediately
  // following the base image and [1] being the final layer.
  repeated Layer layer_info = 3;

  // Output only. This contains the base image URL for the derived image
  // occurrence.
  string base_resource_url = 4;
}