feat(cmd/rofl): Add initial support for ROFL app management

build/cargo/cargo.go

@@ -0,0 +1,111 @@
+// Package cargo contains helper functions for building Rust applications using cargo.
+package cargo
+
+import (
+	"encoding/json"
+	"fmt"
+	"os/exec"
+)
+
+// Metadata is the cargo package metadata.
+type Metadata struct {
+	Name    string
+	Version string
+}
+
+// GetMetadata queries `cargo` for metadata of the package in the current working directory.
+func GetMetadata() (*Metadata, error) {
+	cmd := exec.Command("cargo", "metadata", "--no-deps")
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		return nil, fmt.Errorf("failed to initialize metadata process: %w", err)
+	}
+	if err = cmd.Start(); err != nil {
+		return nil, fmt.Errorf("failed to start metadata process: %w", err)
+	}
+
+	dec := json.NewDecoder(stdout)
+	var rawMeta struct {
+		Packages []struct {
+			Name    string `json:"name"`
+			Version string `json:"version"`
+		} `json:"packages"`
+	}
+	if err = dec.Decode(&rawMeta); err != nil {
+		return nil, fmt.Errorf("malformed cargo metadata: %w", err)
+	}
+	if err = cmd.Wait(); err != nil {
+		return nil, fmt.Errorf("metadata process failed: %w", err)
+	}
+	if len(rawMeta.Packages) == 0 {
+		return nil, fmt.Errorf("no cargo packages found")
+	}
+
+	return &Metadata{
+		Name:    rawMeta.Packages[0].Name,
+		Version: rawMeta.Packages[0].Version,
+	}, nil
+}
+
+// Build builds a Rust program using `cargo` in the current working directory.
+func Build(release bool, target string) (string, error) {
+	args := []string{"build"}
+	if release {
+		args = append(args, "--release")
+	}
+	if target != "" {
+		args = append(args, "--target", target)
+	}
+	// Ensure the build process outputs JSON.
+	args = append(args, "--message-format", "json")
+
+	cmd := exec.Command("cargo", args...)
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		return "", fmt.Errorf("failed to initialize build process: %w", err)
+	}
+	if err = cmd.Start(); err != nil {
+		return "", fmt.Errorf("failed to start build process: %w", err)
+	}
+
+	var executable string
+	dec := json.NewDecoder(stdout)
+	for {
+		var output struct {
+			Reason    string `json:"reason"`
+			PackageID string `json:"package_id,omitempty"`
+			Target    struct {
+				Kind []string `json:"kind"`
+			} `json:"target,omitempty"`
+			Executable string `json:"executable,omitempty"`
+			Message    struct {
+				Rendered string `json:"rendered"`
+			} `json:"message,omitempty"`
+		}
+		if err = dec.Decode(&output); err != nil {
+			break
+		}
+
+		switch output.Reason {
+		case "compiler-message":
+			fmt.Println(output.Message.Rendered)
+		case "compiler-artifact":
+			fmt.Printf("[built] %s\n", output.PackageID)
+			if len(output.Target.Kind) != 1 || output.Target.Kind[0] != "bin" {
+				continue
+			}
+
+			// Extract the last built executable.
+			executable = output.Executable
+		default:
+		}
+	}
+	if err = cmd.Wait(); err != nil {
+		return "", fmt.Errorf("build process failed: %w", err)
+	}
+
+	if executable == "" {
+		return "", fmt.Errorf("no executable generated")
+	}
+	return executable, nil
+}

build/sgxs/sgxs.go

@@ -0,0 +1,23 @@
+// Package sgxs contains helper functions for dealing with ELF and SGXS binaries.
+package sgxs
+
+import (
+	"os/exec"
+	"strconv"
+)
+
+// Elf2Sgxs converts an ELF binary built for the SGX ABI into an SGXS binary.
+//
+// It requires the `ftxsgx-elf2sgxs` utility to be installed.
+func Elf2Sgxs(elfSgxPath, sgxsPath string, heapSize, stackSize, threads uint64) error {
+	args := []string{
+		elfSgxPath,
+		"--heap-size", strconv.FormatUint(heapSize, 10),
+		"--stack-size", strconv.FormatUint(stackSize, 10),
+		"--threads", strconv.FormatUint(threads, 10),
+		"--output", sgxsPath,
+	}
+
+	cmd := exec.Command("ftxsgx-elf2sgxs", args...)
+	return cmd.Run()
+}