From 87558a9b0ed17934b719fc781d4e9c2f4323f054 Mon Sep 17 00:00:00 2001
From: Ivan Enderlin <ivan@mnt.io>
Date: Mon, 30 Aug 2021 17:32:47 +0200
Subject: [PATCH] feat(vfs) `mem-fs` does not support `enable-serde`.

---
 lib/vfs/src/lib.rs                | 3 +++
 lib/vfs/src/mem_fs/file.rs        | 2 --
 lib/vfs/src/mem_fs/file_opener.rs | 2 --
 lib/vfs/src/mem_fs/filesystem.rs  | 2 --
 lib/vfs/src/mem_fs/stdio.rs       | 4 ----
 5 files changed, 3 insertions(+), 10 deletions(-)

diff --git a/lib/vfs/src/lib.rs b/lib/vfs/src/lib.rs
index 50a80edbad5..d69f52e8c13 100644
--- a/lib/vfs/src/lib.rs
+++ b/lib/vfs/src/lib.rs
@@ -8,6 +8,9 @@ use thiserror::Error;
 #[cfg(all(not(feature = "host-fs"), not(feature = "mem-fs")))]
 compile_error!("At least the `host-fs` or the `mem-fs` feature must be enabled. Please, pick one.");
 
+#[cfg(all(feature = "mem-fs", feature = "enable-serde"))]
+compile_error!("`mem-fs` does not support `enable-serde` for the moment.");
+
 #[cfg(feature = "host-fs")]
 pub mod host_fs;
 #[cfg(feature = "mem-fs")]
diff --git a/lib/vfs/src/mem_fs/file.rs b/lib/vfs/src/mem_fs/file.rs
index fe0862ee000..58474665f22 100644
--- a/lib/vfs/src/mem_fs/file.rs
+++ b/lib/vfs/src/mem_fs/file.rs
@@ -4,8 +4,6 @@
 
 use super::*;
 use crate::{FileDescriptor, FsError, Result, VirtualFile};
-#[cfg(feature = "enable-serde")]
-use serde::{Deserialize, Serialize};
 use std::cmp;
 use std::convert::TryInto;
 use std::fmt;
diff --git a/lib/vfs/src/mem_fs/file_opener.rs b/lib/vfs/src/mem_fs/file_opener.rs
index 19bc34f0f33..08348aabfa4 100644
--- a/lib/vfs/src/mem_fs/file_opener.rs
+++ b/lib/vfs/src/mem_fs/file_opener.rs
@@ -1,7 +1,5 @@
 use super::*;
 use crate::{FileType, FsError, Metadata, OpenOptionsConfig, Result, VirtualFile};
-#[cfg(feature = "enable-serde")]
-use serde::{Deserialize, Serialize};
 use std::io::{self, Seek};
 use std::path::Path;
 
diff --git a/lib/vfs/src/mem_fs/filesystem.rs b/lib/vfs/src/mem_fs/filesystem.rs
index 9e2913ed7bc..6f08142ce76 100644
--- a/lib/vfs/src/mem_fs/filesystem.rs
+++ b/lib/vfs/src/mem_fs/filesystem.rs
@@ -2,8 +2,6 @@
 
 use super::*;
 use crate::{DirEntry, FileType, FsError, Metadata, OpenOptions, ReadDir, Result};
-#[cfg(feature = "enable-serde")]
-use serde::{Deserialize, Serialize};
 use slab::Slab;
 use std::convert::identity;
 use std::ffi::OsString;
diff --git a/lib/vfs/src/mem_fs/stdio.rs b/lib/vfs/src/mem_fs/stdio.rs
index 9f4df6378db..db47ef33b41 100644
--- a/lib/vfs/src/mem_fs/stdio.rs
+++ b/lib/vfs/src/mem_fs/stdio.rs
@@ -2,8 +2,6 @@
 //! `stdin`, `stdout` and `stderr`.
 
 use crate::{FileDescriptor, FsError, Result, VirtualFile};
-#[cfg(feature = "enable-serde")]
-use serde::{Deserialize, Serialize};
 use std::io::{self, Read, Seek, Write};
 
 macro_rules! impl_virtualfile_on_std_streams {
@@ -11,7 +9,6 @@ macro_rules! impl_virtualfile_on_std_streams {
         /// A wrapper type around the standard I/O stream of the same
         /// name that implements `VirtualFile`.
         #[derive(Debug, Default)]
-        #[cfg_attr(feature = "enable-serde", derive(Serialize, Deserialize))]
         pub struct $name {
             pub buf: Vec<u8>,
         }
@@ -26,7 +23,6 @@ macro_rules! impl_virtualfile_on_std_streams {
             }
         }
 
-        #[cfg_attr(feature = "enable-serde", typetag::serde)]
         impl VirtualFile for $name {
             fn last_accessed(&self) -> u64 {
                 0