chore: release v0.4.2

[github-actions]

🤖 New release

• fstool: 0.4.1 -> 0.4.2 (✓ API compatible changes)

Changelog

0.4.2 - 2026-05-25

Added

• (xfs) refuse open_file_rw on REFLINK files — prevent clone corruption (Phase 3b stage 3)
• (xfs) clone_file via shared extents + REFCNTBT records (Phase 3b stage 2)
• (xfs) REFLINK feature opt-in + per-AG REFCNTBT root (Phase 3b stage 1)
• (fs) clone API — Filesystem::clone_file / clone_range + CloneCapability (Phase 3a)
• (ntfs) create_device for char/block via INTX_FILE; sort $I30 entries
• (hfs+) create_device — char / block / FIFO / socket nodes
• (ntfs) implement remove (file / empty-dir / symlink), the inverse of create
• (ntfs) make a reopened image mutable (lazy writer reconstruction)
• (ntfs) getattr (times + synthesised mode) and list_xattrs
• (hfs+) faithful getattr
• (iso9660) faithful getattr from Rock Ridge
• (apfs) faithful getattr
• (archive) shared archive core + zip/cpio/ar backends, 7 scaffolds

Fixed

• (fs) owned-tempfile FileSource for deferred-write backends; SquashFS getattr

Other

• fix 5 broken intra-doc links + BSD-ar cross-check on macOS
• (dmg) end-to-end against hdiutil on macOS (UDRW / UDZO / UDBZ / ULFO)
• (fuzz) NTFS fuzz target + Op::Clone with shares_extents freezing
• F2FS is build-once — correct the in-place-edits column
• cross-backend reopen-mutate sweep; make F2FS advertise build-once
• every repack source reader now surfaces faithful metadata
• move qcow2 / dmg out of the filesystem-support table
• (repack) unify pipeline — one walker + sink, no per-pair paths
• lib-level fuzz across 8 mutable backends
• (ext) cover multi-open_file_rw write extending file across drops

Changed

• (repack) unified the repack pipeline: one generic source walker feeds
  one of two sinks (a streaming-tar sink or a block-device Filesystem
  sink). The per-(source,dest)-type copiers are gone — any readable
  source now repacks into any writable destination through a single
  trait-driven path. The only branch is streaming (tar / .tar.<codec>)
  vs non-streaming output. Previously-rejected combinations now work
  (e.g. repack app.zip out.tar, repack image.xfs out.tar).
• (fs) Filesystem gains create_file_streaming (zero-copy body
  streaming, no per-file tempfile; ext/fat32/exfat override it) and a
  batch set_xattrs. Faithful getattr (real mode/uid/gid/times, and
  xattrs/device numbers where stored) now on tar, f2fs, and XFS sources
  in addition to ext — so repacking from them preserves metadata.

Added

• (archive) shared archive core (src/fs/archive/) — an indexed-entry
  model plus a generic read-only Filesystem implementation that archive
  formats plug into by supplying a scanner (and, if writable, a builder).
• (archive) zip — full read (central-directory scan, robust EOCD
  search, ZIP64, Unix mode/symlinks, Shift-JIS/EUC-JP/UTF-8 filename
  detection) and write (Stored + Deflate, CRC-32, ZIP64 when needed).
  Reads archives produced by other tools; output validates with unzip.
• (archive) cpio — read newc/odc + write newc; round-trips through
  system cpio.
• (archive) ar — read GNU + BSD long names, write GNU; round-trips
  through system ar. Flat archive (rejects nested paths).
• (archive) detection-only scaffolds for 7z, rar, arc, lha, lzx, cab,
  sit — recognised by info, with a clean Unsupported on read until
  pure-Rust decoders are wired (per format, behind a future Cargo feature).
• (cli) create -t {zip,cpio,ar}, repack --fs-type {zip,cpio,ar},
  build with type = "zip"|"cpio"|"ar", and mount for all archive
  formats; archive output is truncated to its exact length.

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