refactor(conf): improve kill_delay option

air_example.conf

@@ -20,16 +20,16 @@ exclude_dir = ["assets", "tmp", "vendor", "frontend/node_modules"]
 include_dir = []
 # Exclude files.
 exclude_file = []
+# This log file places in your tmp_dir.
+log = "air.log"
 # It's not necessary to trigger build each time file changes if it's too frequent.
 delay = 1000 # ms
-# Stop to run old binary when build errors occur.
+# Stop running old binary when build errors occur.
 stop_on_error = true
-# This log file places in your tmp_dir.
-log = "air_errors.log"
 # Send Interrupt signal before killing process (windows does not support this feature)
 send_interrupt = false
 # Delay after sending Interrupt signal
-kill_delay = 0
+kill_delay = 500 # ms
 
 [log]
 # Show log time

runner/util_darwin.go

@@ -17,16 +17,12 @@ func (e *Engine) killCmd(cmd *exec.Cmd) (pid int, err error) {
 		if err = syscall.Kill(-pid, syscall.SIGINT); err != nil {
 			return
 		}
-
-		time.Sleep(e.config.Build.KillDelay * time.Second)
+		time.Sleep(e.config.Build.KillDelay * time.Millisecond)
 	}
-
 	// https://stackoverflow.com/questions/22470193/why-wont-go-kill-a-child-process-correctly
 	err = syscall.Kill(-pid, syscall.SIGKILL)
-
 	// Wait releases any resources associated with the Process.
 	_, _ = cmd.Process.Wait()
-
 	return pid, err
 }
 

runner/util_linux.go

@@ -17,16 +17,14 @@ func (e *Engine) killCmd(cmd *exec.Cmd) (pid int, err error) {
 		if err = syscall.Kill(-pid, syscall.SIGINT); err != nil {
 			return
 		}
-
-		time.Sleep(e.config.Build.KillDelay * time.Second)
+		time.Sleep(e.config.Build.KillDelay * time.Millisecond)
 	}
 
 	// https://stackoverflow.com/questions/22470193/why-wont-go-kill-a-child-process-correctly
 	err = syscall.Kill(-pid, syscall.SIGKILL)
 
 	// Wait releases any resources associated with the Process.
 	_, _ = cmd.Process.Wait()
-
 	return
 }
 

runner/util_windows.go

@@ -9,7 +9,6 @@ import (
 
 func (e *Engine) killCmd(cmd *exec.Cmd) (pid int, err error) {
 	pid = cmd.Process.Pid
-
 	// https://stackoverflow.com/a/44551450
 	kill := exec.Command("TASKKILL", "/T", "/F", "/PID", strconv.Itoa(pid))
 	return pid, kill.Run()