add psudofs mounting to transation hooks because im stupid and it wasn't a feature before

src/install/hooks.rs

@@ -550,7 +550,14 @@ fn run_hook_command(
         None
     };
 
-    let mut command = if fakeroot::is_root() && rootfs.join("bin/sh").exists() {
+    let use_chroot = fakeroot::is_root() && rootfs.join("bin/sh").exists();
+    let _mounts = if should_mount_chroot_filesystems(rootfs, use_chroot) {
+        Some(super::scripts::mount_chroot_filesystems(rootfs, None)?)
+    } else {
+        None
+    };
+
+    let mut command = if use_chroot {
         let mut cmd = Command::new("chroot");
         cmd.arg(rootfs).arg("/bin/sh").arg("-lc").arg(&hook.command);
         cmd
@@ -589,6 +596,10 @@ fn run_hook_command(
     Ok(())
 }
 
+fn should_mount_chroot_filesystems(rootfs: &Path, use_chroot: bool) -> bool {
+    use_chroot && super::scripts::should_use_chroot(rootfs)
+}
+
 fn run_command_with_optional_stdin(
     command: &mut Command,
     stdin_payload: Option<&str>,
@@ -662,6 +673,15 @@ mod tests {
         assert!(!wildcard_match("usr/bin/*", "usr/lib/libc.so"));
     }
 
+    #[test]
+    fn transaction_hooks_mount_filesystems_only_for_target_chroots() {
+        let rootfs = tempfile::tempdir().unwrap();
+
+        assert!(should_mount_chroot_filesystems(rootfs.path(), true));
+        assert!(!should_mount_chroot_filesystems(rootfs.path(), false));
+        assert!(!should_mount_chroot_filesystems(Path::new("/"), true));
+    }
+
     #[test]
     fn parse_hook_accepts_starpack_style_sections() {
         let tmp = tempfile::tempdir().unwrap();

src/install/scripts.rs

@@ -320,7 +320,7 @@ enum HookRunOutcome {
 }
 
 #[derive(Default)]
-struct ChrootMountGuard {
+pub(super) struct ChrootMountGuard {
     mounted: Vec<Mount>,
 }
 
@@ -359,7 +359,7 @@ impl Drop for ChrootMountGuard {
     }
 }
 
-fn should_use_chroot(rootfs: &Path) -> bool {
+pub(super) fn should_use_chroot(rootfs: &Path) -> bool {
     let canonical_root = fs::canonicalize("/").ok();
     let canonical_rootfs = fs::canonicalize(rootfs).ok();
     match (canonical_rootfs, canonical_root) {
@@ -372,7 +372,7 @@ fn should_bootstrap_host_shell(should_chroot: bool, is_root: bool, shell_exists:
     should_chroot && is_root && !shell_exists
 }
 
-fn mount_chroot_filesystems(
+pub(super) fn mount_chroot_filesystems(
     rootfs: &Path,
     bootstrap_script_path: Option<&Path>,
 ) -> Result<ChrootMountGuard> {