Code at the speed of thought – Zed is a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.
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Kirill Bulatov 9df92c3fb6
Correctly handle network issues during LSP server installation (#9460)
Closes https://github.com/zed-industries/zed/issues/9458

When flying in a plane being totally offline, I've discovered that my
Rust projects do not have any LSP support and rust-analyzer disappeared
out of `~/Library/Application Support/Zed/languages/rust-analyzer/`
directory.

Looking at the
[bad.log](https://github.com/zed-industries/zed/files/14627508/bad.log),
it appears that `get_language_server_command` tries to find a newer LSP
server version and fails on
80bc6c8cc8/crates/language/src/language.rs (L339)

bailing out of all installation related-methods up to here:


80bc6c8cc8/crates/project/src/project.rs (L2916)

where the code thinks that the binary installation process had failed,
cleans the existing directory and tries to install the language server
again:

```log
[2024-03-17T15:14:13+02:00 WARN  isahc::handler] request completed with error: failed to resolve host name
[2024-03-17T15:14:13+02:00 ERROR project] failed to start language server "rust-analyzer": error fetching latest release
[2024-03-17T15:14:13+02:00 ERROR project] server stderr: Some("")
[2024-03-17T15:14:13+02:00 INFO  project] retrying installation of language server "rust-analyzer" in 1s
[2024-03-17T15:14:13+02:00 ERROR util] crates/lsp/src/lsp.rs:720: oneshot canceled
[2024-03-17T15:14:14+02:00 INFO  project] About to spawn test binary
[2024-03-17T15:14:14+02:00 WARN  project] test binary failed to launch
[2024-03-17T15:14:14+02:00 WARN  project] test binary check failed
[2024-03-17T15:14:14+02:00 INFO  project] beginning to reinstall server
[2024-03-17T15:14:14+02:00 INFO  language::language_registry] deleting server container
[2024-03-17T15:14:14+02:00 INFO  language::language_registry] starting language server "rust-analyzer", path: "/Users/someonetoignore/work/other/local_test", id: 2
[2024-03-17T15:14:14+02:00 INFO  language] fetching latest version of language server "rust-analyzer"
[2024-03-17T15:14:14+02:00 WARN  isahc::handler] request completed with error: failed to resolve host name
[2024-03-17T15:14:14+02:00 ERROR project] failed to start language server "rust-analyzer": error fetching latest release
[2024-03-17T15:14:14+02:00 ERROR project] server stderr: Some("")
[2024-03-17T15:14:14+02:00 INFO  project] retrying installation of language server "rust-analyzer" in 1s
[2024-03-17T15:14:15+02:00 ERROR util] crates/languages/src/rust.rs:335: no cached binary
[2024-03-17T15:14:15+02:00 INFO  project] About to spawn test binary
............
```

The PR extracts away all binary fetching-related code into a single
method that does not fail the entire `get_language_server_command` and
allows it to recover and reuse the existing binary:


[good.log](https://github.com/zed-industries/zed/files/14627507/good.log)

```log
[2024-03-17T15:12:24+02:00 INFO  language::language_registry] starting language server "rust-analyzer", path: "/Users/someonetoignore/work/other/local_test", id: 1
[2024-03-17T15:12:24+02:00 INFO  language] fetching latest version of language server "rust-analyzer"
[2024-03-17T15:12:24+02:00 WARN  isahc::handler] request completed with error: failed to resolve host name
[2024-03-17T15:12:24+02:00 INFO  language] failed to fetch newest version of language server LanguageServerName("rust-analyzer"). falling back to using "/Users/someonetoignore/Library/Application Support/Zed/languages/rust-analyzer/rust-analyzer-2024-03-11"
[2024-03-17T15:12:24+02:00 INFO  lsp] starting language server. binary path: "/Users/someonetoignore/Library/Application Support/Zed/languages/rust-analyzer/rust-analyzer-2024-03-11", working directory: "/Users/someonetoignore/work/other/local_test", args: []
```

Release Notes:

- Fixed language servers erased from the disk when project is opened
offline
2024-03-17 15:41:00 +02:00
.cargo Enable tokio-console (#8897) 2024-03-05 10:56:14 -07:00
.config
.github [WIP] chore: Distribute non-universal binaries on Mac (#9284) 2024-03-15 17:33:58 +01:00
.zed Ensure more Zed files are formatted uniformly (#8505) 2024-02-27 23:25:36 +02:00
assets Small improvements of the task terminal spawn behavior (#9399) 2024-03-15 18:32:59 +02:00
crates Correctly handle network issues during LSP server installation (#9460) 2024-03-17 15:41:00 +02:00
docs Add a setting for custom associations between languages and files (#9290) 2024-03-13 10:23:30 -07:00
extensions Provide wasm extensions with APIs needed for using pre-installed LSP binaries (#9085) 2024-03-08 17:18:06 -05:00
script ci: fix-up upload path in upload-nightly for aarch64 (#9409) 2024-03-15 18:23:47 +01:00
tooling/xtask Restore --all-targets for clippy (#9346) 2024-03-14 12:39:45 -04:00
.dockerignore Add serialized versions of themes (#6885) 2024-01-27 13:35:43 -05:00
.gitattributes Prevent GitHub from displaying comments within JSON files as errors (#7043) 2024-01-29 23:11:25 -05:00
.gitignore windows: Add file dialog using IFileOpenDialog (#8919) 2024-03-08 20:07:48 -08:00
.gitmodules
.mailmap Update .mailmap (#7871) 2024-02-15 18:35:43 -05:00
Cargo.lock Add JSDoc syntax highlighting support (#7826) 2024-03-15 15:17:06 -06:00
Cargo.toml Windows: direct load DCompositionWaitForCompositorClock and fallback (#9351) 2024-03-15 17:17:26 -07:00
CODE_OF_CONDUCT.md Add CODE_OF_CONDUCT.md (#4239) 2024-01-23 22:31:39 -05:00
CONTRIBUTING.md Style crate names in CONTRIBUTING.md (#6939) 2024-01-28 11:07:37 -05:00
debug.plist
docker-compose.sql
docker-compose.yml Add LiveKit server to Docker Compose (#7907) 2024-02-16 10:49:48 -05:00
Dockerfile add a script to get a flamegraph of collab in production (#8972) 2024-03-06 16:39:48 -07:00
LICENSE-AGPL chore: Add crate licenses. (#4158) 2024-01-23 16:56:22 +01:00
LICENSE-APACHE chore: Add crate licenses. (#4158) 2024-01-23 16:56:22 +01:00
LICENSE-GPL Licenses: change license fields in Cargo.toml to AGPL-3.0-or-later. (#5535) 2024-01-27 13:51:16 +01:00
livekit.yaml Add LiveKit server to Docker Compose (#7907) 2024-02-16 10:49:48 -05:00
Procfile Make collab quieter on startup (#8685) 2024-03-01 13:39:13 -07:00
README.md Update Homebrew installation instructions (#9356) 2024-03-14 14:00:31 -04:00
rust-toolchain.toml chore: Bump Rust version to 1.76 (#7592) 2024-02-09 10:45:39 +02:00
typos.toml Impl drag-drop action for Windows (#8959) 2024-03-07 15:59:48 -08:00

Zed

CI

Welcome to Zed, a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.

Installation

You can download Zed today for macOS (v10.15+).

Support for additional platforms is on our roadmap:

For macOS users, you can also install Zed using Homebrew:

brew install zed

Alternatively, to install the Preview release:

brew tap homebrew/cask-versions
brew install zed-preview

Developing Zed

Contributing

See CONTRIBUTING.md for ways you can contribute to Zed.

Licensing

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We use cargo-about to automatically comply with open source licenses. If CI is failing, check the following:

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