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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 tests: Test 'db' package sequentially (#2654) 2023-06-28 15:00:43 +02:00
.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 WIP: start on live_kit_server 2022-10-17 09:59:16 +02:00
.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 WIP 2023-12-14 09:25:14 -07:00
docker-compose.sql Add config files for running Postgres inside Docker Compose (#3637) 2023-12-13 17:25:07 -05:00
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

README.md

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

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 specified error for a crate you've created? If so, add publish = false under [package] in your crate's Cargo.toml.
  • Is the error failed to satisfy license requirements for 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 the accepted array in script/licenses/zed-licenses.toml.
  • Is cargo-about unable to find the license for a dependency? If so, add a clarification field at the end of script/licenses/zed-licenses.toml, as specified in the cargo-about book.