/**
 * The type of principal CodeBuild will use to pull your build Docker image.
 */
export declare enum ImagePullPrincipalType {
    /**
     * CODEBUILD specifies that CodeBuild uses its own identity when pulling the image.
     * This means the resource policy of the ECR repository that hosts the image will be modified to trust
     * CodeBuild's service principal.
     * This is the required principal type when using CodeBuild's pre-defined images.
     */
    CODEBUILD = "CODEBUILD",
    /**
     * SERVICE_ROLE specifies that AWS CodeBuild uses the project's role when pulling the image.
     * The role will be granted pull permissions on the ECR repository hosting the image.
     */
    SERVICE_ROLE = "SERVICE_ROLE"
}