Add CI to run tests on macOS

.github/workflows/ci.yml

@@ -63,3 +63,23 @@ jobs:
 
       - name: Run tests
         run: INTERACTIVE="" make ${{ matrix.test_group }}
+
+  test-mac:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      # Note that this is a partial install of macFUSE, for a complete installation that would require to install the kernel extension
+      # But that currently not possible without restarting the machine
+      - name: Install macFUSE
+        run: brew install --cask macfuse
+
+      - uses: actions-rust-lang/setup-rust-toolchain@v1
+
+      - name: Run tests
+        # The macFuse kernel extension is not installed so we need to skip the unmount_no_send test
+        run: cargo test --features=libfuse -- --skip unmount_no_send
+        env:
+          RUST_LOG: DEBUG
+        timeout-minutes: 5
+

examples/simple.rs

@@ -1098,6 +1098,9 @@ impl Filesystem for SimpleFS {
         flags: u32,
         reply: ReplyEmpty,
     ) {
+        #[cfg(target_os = "macos")]
+        let _ = flags;
+
         let mut inode_attrs = match self.lookup_name(parent, name) {
             Ok(attrs) => attrs,
             Err(error_code) => {
@@ -1922,6 +1925,9 @@ fn as_file_kind(mut mode: u32) -> FileKind {
 }
 
 fn get_groups(pid: u32) -> Vec<u32> {
+    #[cfg(target_os = "macos")]
+    let _ = pid;
+
     #[cfg(not(target_os = "macos"))]
     {
         let path = format!("/proc/{pid}/task/{pid}/status");

src/mnt/mod.rs

@@ -17,7 +17,7 @@ pub mod mount_options;
 
 #[cfg(any(feature = "libfuse", test))]
 use fuse2_sys::fuse_args;
-#[cfg(any(test, not(feature = "libfuse")))]
+#[cfg(any(all(test, not(target_os = "macos")), not(feature = "libfuse")))]
 use std::fs::File;
 #[cfg(any(test, not(feature = "libfuse"), not(feature = "libfuse3")))]
 use std::io;
@@ -87,7 +87,7 @@ fn libc_umount(mnt: &CStr) -> io::Result<()> {
 
 /// Warning: This will return true if the filesystem has been detached (lazy unmounted), but not
 /// yet destroyed by the kernel.
-#[cfg(any(test, not(feature = "libfuse")))]
+#[cfg(any(all(test, not(target_os = "macos")), not(feature = "libfuse")))]
 fn is_mounted(fuse_device: &File) -> bool {
     use libc::{poll, pollfd};
     use std::os::unix::prelude::AsRawFd;
@@ -121,7 +121,7 @@ fn is_mounted(fuse_device: &File) -> bool {
 #[cfg(test)]
 mod test {
     use super::*;
-    use std::{ffi::CStr, mem::ManuallyDrop};
+    use std::ffi::CStr;
 
     #[test]
     fn fuse_args() {
@@ -142,6 +142,8 @@ mod test {
             },
         );
     }
+
+    #[cfg(not(target_os = "macos"))]
     fn cmd_mount() -> String {
         std::str::from_utf8(
             std::process::Command::new("sh")
@@ -156,8 +158,12 @@ mod test {
         .to_owned()
     }
 
+    // Mountpoint are not directly available on MacOS.
+    #[cfg(not(target_os = "macos"))]
     #[test]
     fn mount_unmount() {
+        use std::mem::ManuallyDrop;
+
         // We use ManuallyDrop here to leak the directory on test failure.  We don't
         // want to try and clean up the directory if it's a mountpoint otherwise we'll
         // deadlock.

tests/integration_tests.rs

@@ -5,8 +5,9 @@ use std::time::Duration;
 use tempfile::TempDir;
 
 #[test]
-#[cfg(target_os = "linux")]
+#[cfg(any(target_os = "linux", target_os = "macos"))]
 fn unmount_no_send() {
+    env_logger::init();
     // Rc to make this !Send
     struct NoSendFS(Rc<()>);