[DRE-maint] Bug#1116580: ruby-prometheus-client-mmap - upcoming rust-nix update

[Peter Michael Green]

package: ruby-prometheus-client-mmap

I hope to update rust-nix to 0.30 soon. ruby-prometheus-client-mmap needs
a small patch to build with the new version.

Unfortunately, the small patch breaks builds with the old version, so
uploading this change to sid will have to wait until the new rust-nix is
actuallly in sid, in the meantime the new rust-nix is available in 
experimetal
for testing with.

-------------- next part --------------
diff -Nru ruby-prometheus-client-mmap-1.2.9/debian/changelog ruby-prometheus-client-mmap-1.2.9/debian/changelog
--- ruby-prometheus-client-mmap-1.2.9/debian/changelog	2025-04-24 18:48:30.000000000 +0000
+++ ruby-prometheus-client-mmap-1.2.9/debian/changelog	2025-09-28 18:28:03.000000000 +0000
@@ -1,3 +1,10 @@
+ruby-prometheus-client-mmap (1.2.9-1.1) UNRELEASED; urgency=medium
+
+  * Non-maintainer upload.
+  * Add patch for nix 0.30
+
+ -- Peter Michael Green <plugwash at debian.org>  Sun, 28 Sep 2025 18:28:03 +0000
+
 ruby-prometheus-client-mmap (1.2.9-1) unstable; urgency=medium
 
   [ Pirate Praveen ]
diff -Nru ruby-prometheus-client-mmap-1.2.9/debian/patches/nix-0.30.patch ruby-prometheus-client-mmap-1.2.9/debian/patches/nix-0.30.patch
--- ruby-prometheus-client-mmap-1.2.9/debian/patches/nix-0.30.patch	2025-04-24 18:48:30.000000000 +0000
+++ ruby-prometheus-client-mmap-1.2.9/debian/patches/nix-0.30.patch	2025-09-28 18:28:03.000000000 +0000
@@ -11,3 +11,24 @@
  rb-sys = { version = "0.9", features = ["stable-api-compiled-fallback"] }
  serde = { version = "1.0", features = ["derive"] }
  serde_json = { version = "1.0", features = ["raw_value"] }
+Index: ruby-prometheus-client-mmap-1.2.9/ext/fast_mmaped_file_rs/src/mmap/inner.rs
+===================================================================
+--- ruby-prometheus-client-mmap-1.2.9.orig/ext/fast_mmaped_file_rs/src/mmap/inner.rs
++++ ruby-prometheus-client-mmap-1.2.9/ext/fast_mmaped_file_rs/src/mmap/inner.rs
+@@ -5,6 +5,7 @@ use std::fs::File;
+ use std::mem::size_of;
+ use std::ops::Range;
+ use std::os::unix::prelude::{AsRawFd, RawFd};
++use std::os::fd::BorrowedFd;
+ use std::path::PathBuf;
+ 
+ use crate::error::{MmapError, RubyError};
+@@ -256,7 +257,7 @@ impl InnerMmap {
+     // space).
+     #[cfg(target_os = "linux")]
+     fn reserve_mmap_file_bytes(fd: RawFd, len: off_t) -> nix::Result<()> {
+-        nix::fcntl::posix_fallocate(fd, 0, len)
++        nix::fcntl::posix_fallocate(unsafe { BorrowedFd::borrow_raw(fd) }, 0, len)
+     }
+ 
+     // We simplify the reference implementation since we generally