func toDockerfile()

in frontend/request.go [94:136]
38 lines of code
10 McCabe index (conditional complexity)

func toDockerfile(ctx context.Context, bctx llb.State, dt []byte, spec *dalec.SourceBuild, opts ...llb.ConstraintsOpt) solveRequestOpt {
	return func(req *gwclient.SolveRequest) error {
		req.Frontend = "dockerfile.v0"

		bctxDef, err := bctx.Marshal(ctx)
		if err != nil {
			return errors.Wrap(err, "error marshaling dockerfile to LLB")
		}
		if req.FrontendInputs == nil {
			req.FrontendInputs = make(map[string]*pb.Definition)
		}

		dfDef, err := marshalDockerfile(ctx, dt, opts...)
		if err != nil {
			return errors.Wrap(err, "error marshaling dockerfile to LLB")
		}

		req.FrontendInputs[dockerui.DefaultLocalNameContext] = bctxDef.ToPB()
		req.FrontendInputs[dockerui.DefaultLocalNameDockerfile] = dfDef.ToPB()

		if ref, cmdline, _, ok := parser.DetectSyntax(dt); ok {
			req.Frontend = gatewayFrontend
			if req.FrontendOpt == nil {
				req.FrontendOpt = make(map[string]string)
			}
			req.FrontendOpt["source"] = ref
			req.FrontendOpt["cmdline"] = cmdline
		}

		if spec != nil {
			if req.FrontendOpt == nil {
				req.FrontendOpt = make(map[string]string)
			}
			if spec.Target != "" {
				req.FrontendOpt["target"] = spec.Target
			}
			for k, v := range spec.Args {
				req.FrontendOpt["build-arg:"+k] = v
			}
		}
		return nil
	}
}