Function getAttestArgs

src/context.ts:238–285

(inputs: Inputs, toolkit: Toolkit)

}

async function getAttestArgs(inputs: Inputs, toolkit: Toolkit): Promise<Array<string>> {
  const args: Array<string> = [];

  // check if provenance attestation is set in attests input
  let hasAttestProvenance = false;
  await Util.asyncForEach(inputs.attests, async (attest: string) => {
    if (Build.hasAttestationType('provenance', attest)) {
      hasAttestProvenance = true;
    }
  });

  let provenanceSet = false;
  let sbomSet = false;
  if (inputs.provenance) {
    args.push('--attest', Build.resolveAttestationAttrs(`type=provenance,${inputs.provenance}`));
    provenanceSet = true;
  } else if (!hasAttestProvenance && !noDefaultAttestations() && (await toolkit.buildkit.versionSatisfies(inputs.builder, '>=0.11.0')) && !Build.hasDockerExporter(inputs.outputs, inputs.load)) {
    // if provenance not specified in provenance or attests inputs and BuildKit
    // version compatible for attestation, set default provenance. Also needs
    // to make sure user doesn't want to explicitly load the image to docker.
    if (GitHub.context.payload.repository?.private ?? false) {
      // if this is a private repository, we set the default provenance
      // attributes being set in buildx: https://github.com/docker/buildx/blob/fb27e3f919dcbf614d7126b10c2bc2d0b1927eb6/build/build.go#L603
      args.push('--attest', `type=provenance,${Build.resolveProvenanceAttrs(`mode=min,inline-only=true`)}`);
    } else {
      // for a public repository, we set max provenance mode.
      args.push('--attest', `type=provenance,${Build.resolveProvenanceAttrs(`mode=max`)}`);
    }
  }
  if (inputs.sbom) {
    args.push('--attest', Build.resolveAttestationAttrs(`type=sbom,${inputs.sbom}`));
    sbomSet = true;
  }

  // set attests but check if provenance or sbom types already set as
  // provenance and sbom inputs take precedence over attests input.
  await Util.asyncForEach(inputs.attests, async (attest: string) => {
    if (!Build.hasAttestationType('provenance', attest) && !Build.hasAttestationType('sbom', attest)) {
      args.push('--attest', Build.resolveAttestationAttrs(attest));
    } else if (!provenanceSet && Build.hasAttestationType('provenance', attest)) {
      args.push('--attest', Build.resolveProvenanceAttrs(attest));
    } else if (!sbomSet && Build.hasAttestationType('sbom', attest)) {
      args.push('--attest', attest);
    }
  });

  return args;
}

function noDefaultAttestations(): boolean {
  if (process.env.BUILDX_NO_DEFAULT_ATTESTATIONS) {