Closes AI-394 When the kernel isn't running — e.g. Python isn't installed, ipykernel is missing, or the kernel failed to launch — clicking run on a notebook cell would unconditionally enter the executing state and silently drop the execute request. The cell then spun forever with no logs and no way to cancel (the stop button only works on a running kernel). This change makes `execute_cell` attempt to send the execute request first, and only mark the cell as executing when the send succeeds. On failure it: - Renders the failure (including the original kernel launch error) as an error output on the cell, reusing the same `ErrorView` used for Python tracebacks - Logs the reason at the moment run is clicked, instead of only once at notebook open - No longer swallows `try_send` errors when the kernel process has died Also adds the first unit test for the notebook editor, which exercises the production path end to end: a real `.ipynb` parsed via `NotebookItem::try_open`, a kernelspec pointing at a nonexistent interpreter selected through `ReplStore::set_active_kernelspec`, a real failed process spawn, and assertions through the production save path (`to_nbformat_cell`). Verified red/green: the test fails against the previous behavior. Note for future notebook tests: `NotebookEditor` renders a continuously animating kernel status icon, so rendering it as a root view in a GPUI test makes `run_until_parked` spin forever. The test creates the editor inside an empty window instead. Release Notes: - N/A
Zed
Welcome to Zed, a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.
Installation
On macOS, Linux, and Windows you can download Zed directly or install Zed via your local package manager (macOS/Linux/Windows).
Other platforms are not yet available:
- Web (tracking discussion)
Developing Zed
Contributing
See CONTRIBUTING.md for ways you can contribute to Zed.
Also... we're hiring! Check out our jobs page for open roles.
Licensing
Zed source code is licensed primarily under GPL-3.0-or-later, with Apache-2.0 components where marked.
License information for third party dependencies must be correctly provided for CI to pass.
We use cargo-about to automatically comply with open source licenses. If CI is failing, check the following:
- Is it showing a
no license specifiederror for a crate you've created? If so, addpublish = falseunder[package]in your crate's Cargo.toml. - Is the error
failed to satisfy license requirementsfor a dependency? If so, first determine what license the project has and whether this system is sufficient to comply with this license's requirements. If you're unsure, ask a lawyer. Once you've verified that this system is acceptable add the license's SPDX identifier to theacceptedarray inscript/licenses/zed-licenses.toml. - Is
cargo-aboutunable to find the license for a dependency? If so, add a clarification field at the end ofscript/licenses/zed-licenses.toml, as specified in the cargo-about book.
Sponsorship
Zed is developed by Zed Industries, Inc., a for-profit company.
If you’d like to financially support the project, you can do so via GitHub Sponsors. Sponsorships go directly to Zed Industries and are used as general company revenue. There are no perks or entitlements associated with sponsorship.