add config watch

node/controller/legoCmd/cmd/hook.go

@@ -0,0 +1,47 @@
+package cmd
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+	"time"
+)
+
+func launchHook(hook string, meta map[string]string) error {
+	if hook == "" {
+		return nil
+	}
+
+	ctxCmd, cancel := context.WithTimeout(context.Background(), 120*time.Second)
+	defer cancel()
+
+	parts := strings.Fields(hook)
+
+	cmdCtx := exec.CommandContext(ctxCmd, parts[0], parts[1:]...)
+	cmdCtx.Env = append(os.Environ(), metaToEnv(meta)...)
+
+	output, err := cmdCtx.CombinedOutput()
+
+	if len(output) > 0 {
+		fmt.Println(string(output))
+	}
+
+	if errors.Is(ctxCmd.Err(), context.DeadlineExceeded) {
+		return errors.New("hook timed out")
+	}
+
+	return err
+}
+
+func metaToEnv(meta map[string]string) []string {
+	var envs []string
+
+	for k, v := range meta {
+		envs = append(envs, k+"="+v)
+	}
+
+	return envs
+}