KenanZhuandClaude Opus 4.8
05d76a90af
- tools/server/: Node.js dev server (Express + WebSocket + fs.watch) Watches themes/ for .tmpl changes, rebuilds via Go preview command, applies Juice CSS inlining for email client compatibility, pushes live reload to browser via WebSocket. - tools/cli/dev.go: 'go run . dev' subcommand — starts Node.js server with automatic npm install, initial preview generation, and Ctrl+C graceful shutdown. - tools/tools.go: register dev command in CLI app. - .gitignore: add node_modules exclusion. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
103 lines
2.5 KiB
Go
103 lines
2.5 KiB
Go
package cli
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import (
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"fmt"
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"os"
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"os/exec"
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"os/signal"
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"path/filepath"
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"syscall"
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"github.com/urfave/cli/v2"
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)
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// DevCommand returns the "dev" subcommand.
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func DevCommand() *cli.Command {
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return &cli.Command{
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Name: "dev",
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Usage: "Start a live-reload dev server with CSS inlining (requires Node.js)",
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UsageText: `go run . dev [--port <port>]`,
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Flags: []cli.Flag{
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&cli.IntFlag{
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Name: "port",
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Value: 3456,
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Usage: "Port for the dev server",
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},
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},
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Action: runDev,
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}
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}
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func runDev(c *cli.Context) error {
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port := c.Int("port")
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// Find the server directory relative to the tools/ dir
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exe, _ := os.Executable()
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toolsDir := filepath.Dir(exe)
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// When run with `go run`, resolve relative to CWD
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if _, err := os.Stat(filepath.Join(toolsDir, "server")); os.IsNotExist(err) {
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cwd, _ := os.Getwd()
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toolsDir = cwd
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}
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serverDir := filepath.Join(toolsDir, "server")
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// Verify Node.js is available
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if _, err := exec.LookPath("node"); err != nil {
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return fmt.Errorf("Node.js is required but not found in PATH")
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}
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// Verify node_modules are installed
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if _, err := os.Stat(filepath.Join(serverDir, "node_modules")); os.IsNotExist(err) {
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fmt.Println("Installing Node.js dependencies...")
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cmd := exec.Command("npm", "install")
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cmd.Dir = serverDir
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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return fmt.Errorf("npm install failed: %w", err)
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}
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}
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// Ensure rendered.js exists before starting
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initCmd := exec.Command("go", "run", ".", "preview", "all")
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initCmd.Dir = toolsDir
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initCmd.Stdout = os.Stdout
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initCmd.Stderr = os.Stderr
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if err := initCmd.Run(); err != nil {
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fmt.Println("Warning: initial preview generation failed, starting anyway...")
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}
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// Start the Node.js dev server
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serverCmd := exec.Command("node", "server.mjs")
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serverCmd.Dir = serverDir
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serverCmd.Env = append(os.Environ(), fmt.Sprintf("PORT=%d", port))
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serverCmd.Stdout = os.Stdout
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serverCmd.Stderr = os.Stderr
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if err := serverCmd.Start(); err != nil {
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return fmt.Errorf("failed to start dev server: %w", err)
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}
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fmt.Printf("\nDev server running at http://localhost:%d\n", port)
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fmt.Print("Press Ctrl+C to stop.\n\n")
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// Handle graceful shutdown
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sigCh := make(chan os.Signal, 1)
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signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
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go func() {
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<-sigCh
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fmt.Println("\nShutting down...")
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if err := serverCmd.Process.Signal(os.Interrupt); err != nil {
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serverCmd.Process.Kill()
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}
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os.Exit(0)
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}()
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if err := serverCmd.Wait(); err != nil {
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return fmt.Errorf("dev server exited: %w", err)
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}
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return nil
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}
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