feat: v2 (#599)

Read https://github.com/filebrowser/filebrowser/pull/575.

runner/runner.go

@@ -0,0 +1,81 @@
+package runner
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"strings"
+
+	"github.com/filebrowser/filebrowser/v2/settings"
+	"github.com/filebrowser/filebrowser/v2/users"
+)
+
+// Runner is a commands runner.
+type Runner struct {
+	*settings.Settings
+}
+
+// RunHook runs the hooks for the before and after event.
+func (r *Runner) RunHook(fn func() error, evt, path, dst string, user *users.User) error {
+	path = user.FullPath(path)
+	dst = user.FullPath(dst)
+
+	if val, ok := r.Commands["before_"+evt]; ok {
+		for _, command := range val {
+			err := r.exec(command, "before_"+evt, path, dst, user)
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	err := fn()
+	if err != nil {
+		return err
+	}
+
+	if val, ok := r.Commands["after_"+evt]; ok {
+		for _, command := range val {
+			err := r.exec(command, "after_"+evt, path, dst, user)
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+func (r *Runner) exec(raw, evt, path, dst string, user *users.User) error {
+	blocking := true
+
+	if strings.HasSuffix(raw, "&") {
+		blocking = false
+		raw = strings.TrimSpace(strings.TrimSuffix(raw, "&"))
+	}
+
+	command, err := ParseCommand(r.Settings, raw)
+	if err != nil {
+		return err
+	}
+
+	cmd := exec.Command(command[0], command[1:]...)
+	cmd.Env = append(os.Environ(), fmt.Sprintf("FILE=%s", path))
+	cmd.Env = append(cmd.Env, fmt.Sprintf("SCOPE=%s", user.Scope))
+	cmd.Env = append(cmd.Env, fmt.Sprintf("TRIGGER=%s", evt))
+	cmd.Env = append(cmd.Env, fmt.Sprintf("USERNAME=%s", user.Username))
+	cmd.Env = append(cmd.Env, fmt.Sprintf("DESTINATION=%s", dst))
+
+	cmd.Stdin = os.Stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+
+	if !blocking {
+		log.Printf("[INFO] Nonblocking Command: \"%s\"", strings.Join(command, " "))
+		return cmd.Start()
+	}
+
+	log.Printf("[INFO] Blocking Command: \"%s\"", strings.Join(command, " "))
+	return cmd.Run()
+}