Changelog

Unreleased

Breaking Removed utils::copy_data. It forked into a /usr/bin/env cat for copying. All internal uses of the function have been changed to simply use std::io::copy instead.
Replaced nix with rustix, following wayland-rs.
Replaced the deprecated structopt with clap itself.
Updated dependencies.

Added copy::Options::omit_additional_text_mime_types to disable wl-clipboard-rs offering several known text MIME types when a text MIME type is copied.
Updated wayland-rs to 0.31.
- Breaking This changed the error types slightly. However, most uses of wl-clipboard-rs should be completely unaffected.
Updated other dependencies.

Fixed wl-copy and wl-clip hangs when followed by a pipe (e.g. wl-copy hello | cat).
Removed the deprecated failure dependency from both the library and the tools. The standard Error trait is now used.
Replaced underscores back with dashes in the tool binary names.
Renamed wl-clipboard-tools subcrate to wl-clipboard-rs-tools.

Split binaries from the main crate wl-clipboard-rs into a new sub-crate wl-clipboard-tools. This removes a few dependencies that were only used in the binaries (like structopt).
- This change also unintentionally replaced dashes with underscores in tool binary names.
Replaced tree_magic (which went unmaintained) with tree_magic_mini.
Changed the fork code which runs during the copy operation to exec /usr/bin/env cat instead of just cat. This was done to remove a non-async-signal-safe call in the child process.
Updated dependencies.

Breaking Copying in non-foreground mode no longer forks (which was unsafe in multi-threaded programs). Instead, it spawns a background thread to serve copy requests.
Added copy::prepare_copy() and copy::prepare_copy_multi() (and respective functions in copy::Options) to accommodate workflows which depended on the forking behavior, such as wl-copy. See wl-copy for example usage.
Breaking Changed copy::Source and copy::Seat to own the contained data rather than borrow it. As a consequence, those types, as well as copy::MimeSource and copy::Options, have dropped their lifetime generic parameter.

Reduced the wl_seat version requirement from 6 to 2.
Added copy::copy_multi() for offering multiple data sources under multiple different MIME types.

Breaking Moved ClipboardType into copy:: and paste::.
Breaking Renamed utils::Error into utils::CopyDataError.
Added copy::ClipboardType::Both for operating both clipboards at once.
Added utils::is_primary_selection_supported().
[wl-copy]: added --regular, which, when set together with --primary, makes wl-copy operate on both clipboards at once.

Breaking Changed copy::Options::paste_once to serve_requests which allows to specify the number of paste requests to serve.
Marked copy::Seat and copy::Options as Copy.
Updated data-control, it's now merged into wlr-protocols so no further changes without a version bump.
[wl-copy, wl-paste]: replaced env_logger with stderrlog which made the binaries much smaller.
Implemented wl-clip, a Wayland version of xclip.