125 lines
2.4 KiB
Go
125 lines
2.4 KiB
Go
package main
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import (
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"io"
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"log"
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"os"
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"os/exec"
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"sync"
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"syscall"
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"time"
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)
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func runExpress(changes <-chan FileChange) {
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var currentProcess *exec.Cmd
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var mu sync.Mutex
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// Helper to start the express process
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startExpress := func() *exec.Cmd {
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cmd := exec.Command("node", "../express/dist/index.js")
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Start(); err != nil {
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log.Printf("[express] Failed to start: %v", err)
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return nil
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}
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log.Printf("[express] Started (pid %d)", cmd.Process.Pid)
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// Monitor the process in background
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go func() {
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err := cmd.Wait()
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if err != nil {
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log.Printf("[express] Process exited: %v", err)
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} else {
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log.Printf("[express] Process exited normally")
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}
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}()
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return cmd
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}
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// Helper to stop the express process
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stopExpress := func(cmd *exec.Cmd) {
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if cmd == nil || cmd.Process == nil {
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return
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}
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log.Printf("[express] Stopping (pid %d)", cmd.Process.Pid)
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cmd.Process.Signal(syscall.SIGTERM)
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// Wait briefly for graceful shutdown
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done := make(chan struct{})
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go func() {
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cmd.Wait()
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close(done)
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}()
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select {
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case <-done:
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log.Printf("[express] Stopped gracefully")
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case <-time.After(5 * time.Second):
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log.Printf("[express] Force killing")
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cmd.Process.Kill()
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}
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}
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// Helper to run the build
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runBuild := func() bool {
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log.Printf("[build] Starting ncc build...")
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cmd := exec.Command("sh", "-c", "cd ../express && ../cmd pnpm ncc build ./app.ts")
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stdout, _ := cmd.StdoutPipe()
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stderr, _ := cmd.StderrPipe()
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if err := cmd.Start(); err != nil {
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log.Printf("[build] Failed to start: %v", err)
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return false
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}
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// Copy output
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go io.Copy(os.Stdout, stdout)
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go io.Copy(os.Stderr, stderr)
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err := cmd.Wait()
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if err != nil {
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log.Printf("[build] Failed: %v", err)
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return false
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}
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log.Printf("[build] Success")
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return true
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}
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// Debounce timer
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var debounceTimer *time.Timer
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const debounceDelay = 100 * time.Millisecond
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for change := range changes {
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log.Printf("[watch] %s: %s", change.Operation, change.Path)
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// Reset debounce timer
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if debounceTimer != nil {
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debounceTimer.Stop()
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}
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debounceTimer = time.AfterFunc(debounceDelay, func() {
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if !runBuild() {
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log.Printf("[master] Build failed, keeping current process")
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return
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}
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mu.Lock()
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defer mu.Unlock()
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// Stop old process
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stopExpress(currentProcess)
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// Start new process
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currentProcess = startExpress()
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})
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}
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}
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