feat: v2 (#599)

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

runner/parser.go

@@ -0,0 +1,34 @@
+package runner
+
+import (
+	"os/exec"
+
+	"github.com/mholt/caddy"
+	"github.com/filebrowser/filebrowser/v2/settings"
+)
+
+// ParseCommand parses the command taking in account if the current
+// instance uses a shell to run the commands or just calls the binary
+// directyly.
+func ParseCommand(s *settings.Settings, raw string) ([]string, error) {
+	command := []string{}
+
+	if len(s.Shell) == 0 {
+		cmd, args, err := caddy.SplitCommandAndArgs(raw)
+		if err != nil {
+			return nil, err
+		}
+
+		_, err = exec.LookPath(cmd)
+		if err != nil {
+			return nil, err
+		}
+
+		command = append(command, cmd)
+		command = append(command, args...)
+	} else {
+		command = append(s.Shell, raw)
+	}
+
+	return command, nil
+}