public static async Task BuildContainerImageAsync(OutputContext output, Application application, ContainerStep container) { if (output is null) { throw new ArgumentNullException(nameof(output)); } if (application is null) { throw new ArgumentNullException(nameof(application)); } if (container is null) { throw new ArgumentNullException(nameof(container)); } DockerfileGenerator.ApplyContainerDefaults(application, container); using var tempFile = TempFile.Create(); var dockerFilePath = Path.Combine(application.ProjectDirectory, "Dockerfile"); if (File.Exists(dockerFilePath)) { output.WriteDebugLine("using existing dockerfile"); } else { await DockerfileGenerator.WriteDockerfileAsync(output, application, container, tempFile.FilePath); dockerFilePath = tempFile.FilePath; } output.WriteDebugLine("running docker build"); output.WriteDebug($"> docker build . -t {container.ImageName}:{container.ImageTag} -f \"{dockerFilePath}\""); var capture = output.Capture(); var exitCode = await Process.ExecuteAsync( $"docker", $"build . -t {container.ImageName}:{container.ImageTag} -f \"{dockerFilePath}\"", application.ProjectDirectory, stdOut : capture.StdOut, stdErr : capture.StdErr); output.WriteDebugLine($"done running docker build exit code:{exitCode}"); if (exitCode != 0) { throw new CommandException("Docker build failed."); } }