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Ports apprt/embedded.zig, main_c.zig and config/CApi.zig + c_get.zig as crates/ghostty-lib (cdylib/staticlib/rlib `libghostty`), exporting every function of the unchanged include/ghostty.h - the ABI Ghostty's Swift macOS/iOS app links against. The embedded runtime implements the runtime traits over the host's C callbacks, so the real core drives it. - ghostty-core selects the renderer per target: Metal on Apple (surface NSView/UIView via RtSurface::platform_view), OpenGL elsewhere. - ghostty_config_get follows Zig's c_get rules via a CValue type (143 supported keys, checked against the Zig field types). - The inspector C API is complete; its Metal backend replaces ImGui's Metal renderer and has not run. Verification: generated C ABI probe (sizeof/alignof/offsetof of every struct/union, 755 enum values, every function linked, nm exports, headers byte-identical to upstream); a C host on Linux covering init, CLI actions, config, app, keys, focus and color scheme; an opt-in test-platform feature creating real surfaces on Linux with headless EGL and a pty (13 tests). Apple targets are clippy-clean but not run; the Swift app has not been built against it. Test Plan: - cargo test -p ghostty-lib (and --features test-platform) - cargo clippy --target aarch64-apple-darwin -p ghostty-lib (cross env in docs/rewrite/notes/macos-M1.md)
ghostty-rs
A Rust rewrite of the Ghostty 1.3.1 terminal emulator for Linux (GTK4 + libadwaita, OpenGL).
It aims for behavioural parity with Ghostty: the same configuration file
format, options, defaults and documentation; the same keybindings and
actions; the same ghostty +action CLI; the same terminal emulation
(including kitty keyboard/graphics protocols, OSC 8 hyperlinks, semantic
prompts, synchronized output, tmux control mode); the same shell
integration, themes and terminfo.
Out of scope: macOS, Windows, WASM, the embedded libghostty C API, and
Sentry crash reporting (disabled by default on Linux upstream).
Building and running
Requirements: Rust (edition 2024), GTK ≥ 4.14, libadwaita ≥ 1.5,
fontconfig, freetype, harfbuzz, Oniguruma, libepoxy, blueprint-compiler
and glib-compile-resources at build time.
cargo run # open a terminal window running your shell
cargo run -- -e htop # run a command
cargo run -- +list-themes # CLI actions work like Ghostty's
cargo run --profile production # optimized build (LTO, no debug assertions)
Development builds find resources/ (shell integration, themes, terminfo)
automatically. Your existing Ghostty config
(~/.config/ghostty/config[.ghostty]) is used as-is.
Installing
just install /usr/local # binary, share/ghostty, terminfo, desktop files,
# completions, man pages, translations, icons
just install /usr false true # system-package layout (lib/systemd/user)
Testing
just test # cargo test --workspace (~3000 tests)
just clippy # clippy with -D warnings
Every Zig test block of the ported files was ported to a Rust test.
crates/ghostty-core/tests holds end-to-end tests that drive the real core,
terminal and a real pty through a fake app runtime. ghostty-bench mirrors
Ghostty's benchmark tool; terminal stream throughput is on par with the Zig
build (see docs/rewrite/notes/perf-P1.md).
Documentation
docs/rewrite/ARCHITECTURE.md– top-down decomposition, crate map, key design decisions, intentional omissionsdocs/rewrite/STATUS.md– work package historydocs/rewrite/notes/– per-crate porting notes, deviations from Zig, audits and verification reports
License
MIT, like Ghostty. Bundled fonts and themes carry their own licenses (see
crates/ghostty-font/res/ and resources/themes/).