From 1065c2bf1db2aaf78286b1f9f3c13237baac155b Mon Sep 17 00:00:00 2001 From: Aleksey Kladov Date: Wed, 29 Jan 2020 14:45:32 +0100 Subject: Freshen dev docs a tiny bits --- docs/dev/README.md | 84 ++++++++++++++++++++++----------------------------- docs/dev/debugging.md | 2 ++ 2 files changed, 38 insertions(+), 48 deletions(-) diff --git a/docs/dev/README.md b/docs/dev/README.md index 2f6215d6b..a2be99858 100644 --- a/docs/dev/README.md +++ b/docs/dev/README.md @@ -26,15 +26,6 @@ Discussion happens in this Zulip stream: https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Fwg-rls-2.2E0 -# Work List - -We have this "work list" paper document: - -https://paper.dropbox.com/doc/RLS-2.0-work-list--AZ3BgHKKCtqszbsi3gi6sjchAQ-42vbnxzuKq2lKwW0mkn8Y - -It shows what everyone is working on right now. If you want to (this is not -mandatory), add yourself to the list! - # Issue Labels * [good-first-issue](https://github.com/rust-analyzer/rust-analyzer/labels/good%20first%20issue) @@ -50,10 +41,12 @@ mandatory), add yourself to the list! # CI -We use Travis for CI. Most of the things, including formatting, are checked by +We use GitHub Actions for CI. Most of the things, including formatting, are checked by `cargo test` so, if `cargo test` passes locally, that's a good sign that CI will -be green as well. We use bors-ng to enforce the [not rocket -science](https://graydon2.dreamwidth.org/1597.html) rule. +be green as well. The only exception is that long-running by default a skipped locally. +Use `env RUN_SLOW_TESTS=1 cargo test` to run the full suite. + +We use bors-ng to enforce the [not rocket science](https://graydon2.dreamwidth.org/1597.html) rule. You can run `cargo xtask install-pre-commit-hook` to install git-hook to run rustfmt on commit. @@ -81,42 +74,37 @@ relevant test and execute it (VS Code includes an action for running a single test). However, launching a VS Code instance with locally build language server is -possible. There's even a VS Code task for this, so just F5 should -work (thanks, [@andrew-w-ross](https://github.com/andrew-w-ross)!). - -I often just install development version with `cargo xtask install --server --jemalloc` and -restart the host VS Code. - -See [./debugging.md](./debugging.md) for how to attach to rust-analyzer with -debugger, and don't forget that rust-analyzer has useful `pd` snippet and `dbg` -postfix completion for printf debugging :-) - -# Working With VS Code Extension - -To work on the VS Code extension, launch code inside `editors/code` and use `F5` -to launch/debug. To automatically apply formatter and linter suggestions, use -`npm run fix`. - -Tests are located inside `src/test` and are named `*.test.ts`. They use the -[Mocha](https://mochajs.org) test framework and the builtin Node -[assert](https://nodejs.org/api/assert.html) module. Unlike normal Node tests -they must be hosted inside a VS Code instance. This can be done in one of two -ways: - -1. When `F5` debugging in VS Code select the `Extension Tests` configuration - from the drop-down at the top of the Debug View. This will launch a temporary - instance of VS Code. The test results will appear in the "Debug Console" tab - of the primary VS Code instance. - -2. Run `npm test` from the command line. Although this is initiated from the - command line it is not headless; it will also launch a temporary instance of - VS Code. - -Due to the requirements of running the tests inside VS Code they are **not run -on CI**. When making changes to the extension please ensure the tests are not -broken locally before opening a Pull Request. - -To install **only** the VS Code extension, use `cargo xtask install --client-code`. +possible. There's "Run Extension (Dev Server)" launch configuration for this. + +In general, I use one of the following workflows for fixing bugs and +implementing features. + +If the problem concerns only internal parts of rust-analyzer (ie, I don't need +to touch `ra_lsp_server` crate or typescript code), there is a unit-test for it. +So, I use **Rust Analyzer: Run** action in VS Code to run this single test, and +then just do printf-driven development/debugging. As a sanity check after I'm +done, I use `cargo xtask install --server` and **Reload Window** action in VS +Code to sanity check that the thing works as I expect. + +If the problem concerns only the VS Code extension, I use **Run Extension** +launch configuration from `launch.json`. Notably, this uses the usual +`ra_lsp_server` binary from `PATH`. After I am done with the fix, I use `cargo +xtask install --client-code` to try the new extension for real. + +If I need to fix something in the `ra_lsp_server` crate, I feel sad because it's +on the boundary between the two processes, and working there is slow. I usually +just `cargo xtask install --server` and poke changes from my live environment. +Note that this uses `--release`, which is usually faster overall, because +loading stdlib into debug version of rust-analyzer takes a lot of time. To speed +things up, sometimes I open a temporary hello-world project which has +`"rust-analyzer.withSysroot": false` in `.code/settings.json`. This flag causes +rust-analyzer to skip loading the sysroot, which greatly reduces the amount of +things rust-analyzer needs to do, and makes printf's more useful. Note that you +should only use `eprint!` family of macros for debugging: stdout is used for LSP +communication, and `print!` would break it. + +If I need to fix something simultaneously in the server and in the client, I +feel even more sad. I don't have a specific workflow for this case. # Logging diff --git a/docs/dev/debugging.md b/docs/dev/debugging.md index f868e6998..1ccf4dca2 100644 --- a/docs/dev/debugging.md +++ b/docs/dev/debugging.md @@ -1,5 +1,7 @@ # Debugging vs Code plugin and the Language Server +**NOTE:** the information here is mostly obsolete + Install [LLDB](https://lldb.llvm.org/) and the [LLDB Extension](https://marketplace.visualstudio.com/items?itemName=vadimcn.vscode-lldb). Checkout rust rust-analyzer and open it in vscode. -- cgit v1.2.3