chore: import upstream snapshot with attribution

cmd/micro/cli/build/build.go

@@ -0,0 +1,343 @@
+// Package build provides the micro build command for building service binaries
+package build
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"strings"
+
+	"github.com/urfave/cli/v2"
+	"go-micro.dev/v6/cmd"
+	"go-micro.dev/v6/cmd/micro/run/config"
+)
+
+// Build builds Go binaries for services
+func Build(c *cli.Context) error {
+	dir := c.Args().Get(0)
+	if dir == "" {
+		dir = "."
+	}
+
+	absDir, err := filepath.Abs(dir)
+	if err != nil {
+		return fmt.Errorf("failed to get absolute path: %w", err)
+	}
+
+	// Load config
+	cfg, err := config.Load(absDir)
+	if err != nil {
+		return fmt.Errorf("failed to load config: %w", err)
+	}
+
+	// Output directory
+	outDir := c.String("output")
+	if outDir == "" {
+		outDir = filepath.Join(absDir, "bin")
+	}
+	if err := os.MkdirAll(outDir, 0755); err != nil {
+		return fmt.Errorf("failed to create output dir: %w", err)
+	}
+
+	// Target OS/ARCH
+	targetOS := c.String("os")
+	targetArch := c.String("arch")
+	if targetOS == "" {
+		targetOS = runtime.GOOS
+	}
+	if targetArch == "" {
+		targetArch = runtime.GOARCH
+	}
+
+	if cfg != nil && len(cfg.Services) > 0 {
+		// Build each service from config
+		sorted, err := cfg.TopologicalSort()
+		if err != nil {
+			return err
+		}
+
+		for _, svc := range sorted {
+			svcDir := filepath.Join(absDir, svc.Path)
+			if err := buildService(svc.Name, svcDir, outDir, targetOS, targetArch); err != nil {
+				return fmt.Errorf("failed to build %s: %w", svc.Name, err)
+			}
+		}
+	} else {
+		// Build single service from current directory
+		name := filepath.Base(absDir)
+		if err := buildService(name, absDir, outDir, targetOS, targetArch); err != nil {
+			return err
+		}
+	}
+
+	fmt.Printf("\n  \033[32m✓\033[0m Built to \033[36m%s\033[0m\n", outDir)
+	return nil
+}
+
+func buildService(name, dir, outDir, targetOS, targetArch string) error {
+	binName := name
+	if targetOS == "windows" {
+		binName += ".exe"
+	}
+	outPath := filepath.Join(outDir, binName)
+
+	fmt.Printf("  Building \033[36m%s (%s/%s)...\n", name, targetOS, targetArch)
+
+	// Build command
+	buildCmd := exec.Command("go", "build", "-o", outPath, ".")
+	buildCmd.Dir = dir
+	buildCmd.Env = append(os.Environ(),
+		"GOOS="+targetOS,
+		"GOARCH="+targetArch,
+		"CGO_ENABLED=0",
+	)
+	buildCmd.Stdout = os.Stdout
+	buildCmd.Stderr = os.Stderr
+
+	if err := buildCmd.Run(); err != nil {
+		return fmt.Errorf("go build failed: %w", err)
+	}
+
+	fmt.Printf("  \033[32m✓\033[0m %s\n", outPath)
+	return nil
+}
+
+// Docker builds container images (optional)
+func Docker(c *cli.Context) error {
+	dir := c.Args().Get(0)
+	if dir == "" {
+		dir = "."
+	}
+
+	absDir, err := filepath.Abs(dir)
+	if err != nil {
+		return fmt.Errorf("failed to get absolute path: %w", err)
+	}
+
+	cfg, err := config.Load(absDir)
+	if err != nil {
+		return fmt.Errorf("failed to load config: %w", err)
+	}
+
+	tag := c.String("tag")
+	if tag == "" {
+		tag = "latest"
+	}
+	registry := c.String("registry")
+	push := c.Bool("push")
+
+	if cfg != nil && len(cfg.Services) > 0 {
+		for name, svc := range cfg.Services {
+			svcDir := filepath.Join(absDir, svc.Path)
+			if err := buildDockerImage(name, svcDir, svc.Port, tag, registry, push); err != nil {
+				return fmt.Errorf("failed to build %s: %w", name, err)
+			}
+		}
+	} else {
+		name := filepath.Base(absDir)
+		if err := buildDockerImage(name, absDir, 8080, tag, registry, push); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+const dockerfileTemplate = `FROM golang:1.22-alpine AS builder
+WORKDIR /app
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+RUN CGO_ENABLED=0 go build -o /service .
+
+FROM alpine:latest
+RUN apk --no-cache add ca-certificates
+COPY --from=builder /service /service
+EXPOSE %d
+CMD ["/service"]
+`
+
+func buildDockerImage(name, dir string, port int, tag, registry string, push bool) error {
+	if port == 0 {
+		port = 8080
+	}
+
+	// Generate Dockerfile if not exists
+	dockerfilePath := filepath.Join(dir, "Dockerfile")
+	if _, err := os.Stat(dockerfilePath); os.IsNotExist(err) {
+		fmt.Printf("Generating Dockerfile for %s...\n", name)
+		dockerfile := fmt.Sprintf(dockerfileTemplate, port)
+		if err := os.WriteFile(dockerfilePath, []byte(dockerfile), 0644); err != nil {
+			return fmt.Errorf("failed to write Dockerfile: %w", err)
+		}
+	}
+
+	imageName := name + ":" + tag
+	if registry != "" {
+		imageName = registry + "/" + imageName
+	}
+
+	fmt.Printf("  Building \033[36m%s...\n", imageName)
+
+	buildCmd := exec.Command("docker", "build", "-t", imageName, dir)
+	buildCmd.Stdout = os.Stdout
+	buildCmd.Stderr = os.Stderr
+	if err := buildCmd.Run(); err != nil {
+		return fmt.Errorf("docker build failed: %w", err)
+	}
+
+	fmt.Printf("  \033[32m✓\033[0m Built %s\n", imageName)
+
+	if push {
+		fmt.Printf("Pushing %s...\n", imageName)
+		pushCmd := exec.Command("docker", "push", imageName)
+		pushCmd.Stdout = os.Stdout
+		pushCmd.Stderr = os.Stderr
+		if err := pushCmd.Run(); err != nil {
+			return fmt.Errorf("docker push failed: %w", err)
+		}
+		fmt.Printf("  \033[32m✓\033[0m Pushed %s\n", imageName)
+	}
+
+	return nil
+}
+
+// Compose generates docker-compose.yml (optional)
+func Compose(c *cli.Context) error {
+	dir := c.Args().Get(0)
+	if dir == "" {
+		dir = "."
+	}
+
+	absDir, err := filepath.Abs(dir)
+	if err != nil {
+		return fmt.Errorf("failed to get absolute path: %w", err)
+	}
+
+	cfg, err := config.Load(absDir)
+	if err != nil {
+		return fmt.Errorf("failed to load config: %w", err)
+	}
+
+	if cfg == nil || len(cfg.Services) == 0 {
+		return fmt.Errorf("no services found in micro.mu or micro.json")
+	}
+
+	registry := c.String("registry")
+	tag := c.String("tag")
+	if tag == "" {
+		tag = "latest"
+	}
+
+	var sb strings.Builder
+	sb.WriteString("# Generated by micro build --compose\n")
+	sb.WriteString("version: '3.8'\n\nservices:\n")
+
+	sorted, err := cfg.TopologicalSort()
+	if err != nil {
+		return err
+	}
+
+	for _, svc := range sorted {
+		imageName := svc.Name + ":" + tag
+		if registry != "" {
+			imageName = registry + "/" + imageName
+		}
+
+		fmt.Fprintf(&sb, "  %s:\n", svc.Name)
+		fmt.Fprintf(&sb, "    image: %s\n", imageName)
+
+		if svc.Port > 0 {
+			fmt.Fprintf(&sb, "    ports:\n      - \"%d:%d\"\n", svc.Port, svc.Port)
+		}
+
+		if len(svc.Depends) > 0 {
+			sb.WriteString("    depends_on:\n")
+			for _, dep := range svc.Depends {
+				fmt.Fprintf(&sb, "      - %s\n", dep)
+			}
+		}
+
+		sb.WriteString("    environment:\n      - MICRO_REGISTRY=mdns\n\n")
+	}
+
+	output := filepath.Join(absDir, "docker-compose.yml")
+	if err := os.WriteFile(output, []byte(sb.String()), 0644); err != nil {
+		return fmt.Errorf("failed to write docker-compose.yml: %w", err)
+	}
+
+	fmt.Printf("  \033[32m✓\033[0m Generated %s\n", output)
+	return nil
+}
+
+func init() {
+	cmd.Register(&cli.Command{
+		Name:  "build",
+		Usage: "Build Go binaries for services",
+		Description: `Build compiles Go binaries for your services.
+
+With a micro.mu config, builds all services. Without, builds the current directory.
+Output goes to ./bin/ by default.
+
+Examples:
+  micro build                      # Build for current OS/arch
+  micro build --os linux           # Cross-compile for Linux
+  micro build --os linux --arch arm64  # For ARM64
+  micro build --output ./dist      # Custom output directory
+
+Docker (optional):
+  micro build --docker             # Build container images
+  micro build --docker --push      # Build and push
+  micro build --compose            # Generate docker-compose.yml`,
+		Action: func(c *cli.Context) error {
+			if c.Bool("docker") {
+				return Docker(c)
+			}
+			if c.Bool("compose") {
+				return Compose(c)
+			}
+			return Build(c)
+		},
+		Flags: []cli.Flag{
+			&cli.StringFlag{
+				Name:    "output",
+				Aliases: []string{"o"},
+				Usage:   "Output directory (default: ./bin)",
+			},
+			&cli.StringFlag{
+				Name:  "os",
+				Usage: "Target OS (linux, darwin, windows)",
+			},
+			&cli.StringFlag{
+				Name:  "arch",
+				Usage: "Target architecture (amd64, arm64)",
+			},
+			// Docker options (optional)
+			&cli.BoolFlag{
+				Name:  "docker",
+				Usage: "Build Docker container images instead",
+			},
+			&cli.StringFlag{
+				Name:    "tag",
+				Aliases: []string{"t"},
+				Usage:   "Docker image tag (default: latest)",
+				Value:   "latest",
+			},
+			&cli.StringFlag{
+				Name:    "registry",
+				Aliases: []string{"r"},
+				Usage:   "Docker registry (e.g., docker.io/myuser)",
+			},
+			&cli.BoolFlag{
+				Name:  "push",
+				Usage: "Push Docker images after building",
+			},
+			&cli.BoolFlag{
+				Name:  "compose",
+				Usage: "Generate docker-compose.yml",
+			},
+		},
+	})
+}