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Auto merge of #14307 - davidbarsky:davidbarsky/add-cargo-style-project-discovery-for-buck-and-bazel-sickos, r=Veykril

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Add Cargo-style project discovery for Buck and Bazel Users

This feature requires the user to add a command that generates a `rust-project.json` from a set of files. Project discovery can be invoked in two ways:

1. At extension activation time, which includes the generated `rust-project.json` as part of the linkedProjects argument in `InitializeParams`.
2. Through a new command titled "rust-analyzer: Add current file to workspace", which makes use of a new, rust-analyzer-specific LSP request that adds the workspace without erasing any existing workspaces. Note that there is no mechanism to _remove_ workspaces other than "quit the rust-analyzer server".

Few notes:
-  I think that the command-running functionality _could_ merit being placed into its own extension (and expose it via extension contribution points) to provide build-system idiomatic progress reporting and status handling, but I haven't (yet) made an extension that does this nor does Buck expose this sort of functionality.
-  This approach would _just work_ for Bazel. I'll try and get the tool that's responsible for Buck integration open-sourced soon.
- On the testing side of things, I've used this in around my employer's Buck-powered monorepo and it's a nice experience. That being said, I can't think of an open-source repository where this can be tested in public, so you might need to trust me on this one.

I'd love to get feedback on:
- Naming of LSP extensions/new commands. I'm not too pleased with how "rust-analyzer: Add current file to workspace" is named, in that it's creating a _new_ workspace. I think that this command being added should be gated on `rust-analyzer.discoverProjectCommand` on being set, so I can add this in sequent commits.
- My Typescript. It's not particularly good.
- Suggestions on handling folders with _both_ Cargo and non-Cargo build systems and if I make activation a bit better.

(I previously tried to add this functionality entirely within rust-analyzer-the-LSP server itself, but matklad was right—an extension side approach is much, much easier.)
This commit is contained in:
bors 2023-03-14 17:48:49 +00:00
commit c15335c8b0
11 changed files with 257 additions and 12 deletions
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10
crates/rust-analyzer/src/config.rs
View file

@ -272,7 +272,6 @@ config_data! {
/// The warnings will be indicated by a blue squiggly underline in code
/// and a blue icon in the `Problems Panel`.
diagnostics_warningsAsInfo: Vec<String> = "[]",
/// These directories will be ignored by rust-analyzer. They are
/// relative to the workspace root, and globs are not supported. You may
/// also need to add the folders to Code's `files.watcherExclude`.
@ -895,6 +894,15 @@ impl Config {
}
}
pub fn add_linked_projects(&mut self, linked_projects: Vec<ProjectJsonData>) {
let mut linked_projects = linked_projects
.into_iter()
.map(ManifestOrProjectJson::ProjectJson)
.collect::<Vec<ManifestOrProjectJson>>();
self.data.linkedProjects.append(&mut linked_projects);
}
pub fn did_save_text_document_dynamic_registration(&self) -> bool {
let caps = try_or_def!(self.caps.text_document.as_ref()?.synchronization.clone()?);
caps.did_save == Some(true) && caps.dynamic_registration == Some(true)

1
crates/rust-analyzer/src/handlers.rs
View file

@ -46,6 +46,7 @@ use crate::{
pub(crate) fn handle_workspace_reload(state: &mut GlobalState, _: ()) -> Result<()> {
state.proc_macro_clients.clear();
state.proc_macro_changed = false;
state.fetch_workspaces_queue.request_op("reload workspace request".to_string());
state.fetch_build_data_queue.request_op("reload workspace request".to_string());
Ok(())

16
editors/code/package.json
View file

@ -199,6 +199,11 @@
"title": "Reload workspace",
"category": "rust-analyzer"
},
{
"command": "rust-analyzer.addProject",
"title": "Add current file's crate to workspace",
"category": "rust-analyzer"
},
{
"command": "rust-analyzer.reload",
"title": "Restart server",
@ -428,6 +433,17 @@
"default": false,
"type": "boolean"
},
"rust-analyzer.discoverProjectCommand": {
"markdownDescription": "Sets the command that rust-analyzer uses to generate `rust-project.json` files. This command should only be used\n if a build system like Buck or Bazel is also in use. The command must accept files as arguments and return \n a rust-project.json over stdout.",
"default": null,
"type": [
"null",
"array"
],
"items": {
"type": "string"
}
},
"$generated-start": {},
"rust-analyzer.assist.emitMustUse": {
"markdownDescription": "Whether to insert #[must_use] when generating `as_` methods\nfor enum variants.",

13
editors/code/src/client.ts
View file

@ -6,7 +6,7 @@ import * as Is from "vscode-languageclient/lib/common/utils/is";
import { assert } from "./util";
import * as diagnostics from "./diagnostics";
import { WorkspaceEdit } from "vscode";
import { Config, substituteVSCodeVariables } from "./config";
import { Config, prepareVSCodeConfig } from "./config";
import { randomUUID } from "crypto";
export interface Env {
@ -95,7 +95,16 @@ export async function createClient(
const resp = await next(params, token);
if (resp && Array.isArray(resp)) {
return resp.map((val) => {
return substituteVSCodeVariables(val);
return prepareVSCodeConfig(val, (key, cfg) => {
// we only want to set discovered workspaces on the right key
// and if a workspace has been discovered.
if (
key === "linkedProjects" &&
config.discoveredWorkspaces.length > 0
) {
cfg[key] = config.discoveredWorkspaces;
}
});
});
} else {
return resp;

29
editors/code/src/commands.ts
View file

@ -3,7 +3,7 @@ import * as lc from "vscode-languageclient";
import * as ra from "./lsp_ext";
import * as path from "path";
import { Ctx, Cmd, CtxInit } from "./ctx";
import { Ctx, Cmd, CtxInit, discoverWorkspace } from "./ctx";
import { applySnippetWorkspaceEdit, applySnippetTextEdits } from "./snippets";
import { spawnSync } from "child_process";
import { RunnableQuickPick, selectRunnable, createTask, createArgs } from "./run";
@ -749,6 +749,33 @@ export function reloadWorkspace(ctx: CtxInit): Cmd {
return async () => ctx.client.sendRequest(ra.reloadWorkspace);
}
export function addProject(ctx: CtxInit): Cmd {
return async () => {
const discoverProjectCommand = ctx.config.discoverProjectCommand;
if (!discoverProjectCommand) {
return;
}
const workspaces: JsonProject[] = await Promise.all(
vscode.workspace.workspaceFolders!.map(async (folder): Promise<JsonProject> => {
const rustDocuments = vscode.workspace.textDocuments.filter(isRustDocument);
return discoverWorkspace(rustDocuments, discoverProjectCommand, {
cwd: folder.uri.fsPath,
});
})
);
ctx.addToDiscoveredWorkspaces(workspaces);
// this is a workaround to avoid needing writing the `rust-project.json` into
// a workspace-level VS Code-specific settings folder. We'd like to keep the
// `rust-project.json` entirely in-memory.
await ctx.client?.sendNotification(lc.DidChangeConfigurationNotification.type, {
settings: "",
});
};
}
async function showReferencesImpl(
client: LanguageClient | undefined,
uri: string,

29
editors/code/src/config.ts
View file

@ -34,6 +34,7 @@ export class Config {
constructor(ctx: vscode.ExtensionContext) {
this.globalStorageUri = ctx.globalStorageUri;
this.discoveredWorkspaces = [];
vscode.workspace.onDidChangeConfiguration(
this.onDidChangeConfiguration,
this,
@ -55,6 +56,8 @@ export class Config {
log.info("Using configuration", Object.fromEntries(cfg));
}
public discoveredWorkspaces: JsonProject[];
private async onDidChangeConfiguration(event: vscode.ConfigurationChangeEvent) {
this.refreshLogging();
@ -191,7 +194,7 @@ export class Config {
* So this getter handles this quirk by not requiring the caller to use postfix `!`
*/
private get<T>(path: string): T | undefined {
return substituteVSCodeVariables(this.cfg.get<T>(path));
return prepareVSCodeConfig(this.cfg.get<T>(path));
}
get serverPath() {
@ -214,6 +217,10 @@ export class Config {
return this.get<boolean>("trace.extension");
}
get discoverProjectCommand() {
return this.get<string[] | undefined>("discoverProjectCommand");
}
get cargoRunner() {
return this.get<string | undefined>("cargoRunner");
}
@ -280,18 +287,32 @@ export class Config {
}
}
export function substituteVSCodeVariables<T>(resp: T): T {
// the optional `cb?` parameter is meant to be used to add additional
// key/value pairs to the VS Code configuration. This needed for, e.g.,
// including a `rust-project.json` into the `linkedProjects` key as part
// of the configuration/InitializationParams _without_ causing VS Code
// configuration to be written out to workspace-level settings. This is
// undesirable behavior because rust-project.json files can be tens of
// thousands of lines of JSON, most of which is not meant for humans
// to interact with.
export function prepareVSCodeConfig<T>(
resp: T,
cb?: (key: Extract<keyof T, string>, res: { [key: string]: any }) => void
): T {
if (Is.string(resp)) {
return substituteVSCodeVariableInString(resp) as T;
} else if (resp && Is.array<any>(resp)) {
return resp.map((val) => {
return substituteVSCodeVariables(val);
return prepareVSCodeConfig(val);
}) as T;
} else if (resp && typeof resp === "object") {
const res: { [key: string]: any } = {};
for (const key in resp) {
const val = resp[key];
res[key] = substituteVSCodeVariables(val);
res[key] = prepareVSCodeConfig(val);
if (cb) {
cb(key, res);
}
}
return res as T;
}

61
editors/code/src/ctx.ts
View file

@ -2,12 +2,20 @@ import * as vscode from "vscode";
import * as lc from "vscode-languageclient/node";
import * as ra from "./lsp_ext";
import { Config, substituteVSCodeVariables } from "./config";
import { Config, prepareVSCodeConfig } from "./config";
import { createClient } from "./client";
import { isRustDocument, isRustEditor, LazyOutputChannel, log, RustEditor } from "./util";
import {
executeDiscoverProject,
isRustDocument,
isRustEditor,
LazyOutputChannel,
log,
RustEditor,
} from "./util";
import { ServerStatusParams } from "./lsp_ext";
import { PersistentState } from "./persistent_state";
import { bootstrap } from "./bootstrap";
import { ExecOptions } from "child_process";
// We only support local folders, not eg. Live Share (`vlsl:` scheme), so don't activate if
// only those are in use. We use "Empty" to represent these scenarios
@ -41,6 +49,17 @@ export function fetchWorkspace(): Workspace {
: { kind: "Workspace Folder" };
}
export async function discoverWorkspace(
files: readonly vscode.TextDocument[],
command: string[],
options: ExecOptions
): Promise<JsonProject> {
const paths = files.map((f) => `"${f.uri.fsPath}"`).join(" ");
const joinedCommand = command.join(" ");
const data = await executeDiscoverProject(`${joinedCommand} ${paths}`, options);
return JSON.parse(data) as JsonProject;
}
export type CommandFactory = {
enabled: (ctx: CtxInit) => Cmd;
disabled?: (ctx: Ctx) => Cmd;
@ -52,7 +71,7 @@ export type CtxInit = Ctx & {
export class Ctx {
readonly statusBar: vscode.StatusBarItem;
readonly config: Config;
config: Config;
readonly workspace: Workspace;
private _client: lc.LanguageClient | undefined;
@ -169,7 +188,30 @@ export class Ctx {
};
}
const initializationOptions = substituteVSCodeVariables(rawInitializationOptions);
const discoverProjectCommand = this.config.discoverProjectCommand;
if (discoverProjectCommand) {
const workspaces: JsonProject[] = await Promise.all(
vscode.workspace.workspaceFolders!.map(async (folder): Promise<JsonProject> => {
const rustDocuments = vscode.workspace.textDocuments.filter(isRustDocument);
return discoverWorkspace(rustDocuments, discoverProjectCommand, {
cwd: folder.uri.fsPath,
});
})
);
this.addToDiscoveredWorkspaces(workspaces);
}
const initializationOptions = prepareVSCodeConfig(
rawInitializationOptions,
(key, obj) => {
// we only want to set discovered workspaces on the right key
// and if a workspace has been discovered.
if (key === "linkedProjects" && this.config.discoveredWorkspaces.length > 0) {
obj["linkedProjects"] = this.config.discoveredWorkspaces;
}
}
);
this._client = await createClient(
this.traceOutputChannel,
@ -251,6 +293,17 @@ export class Ctx {
return this._serverPath;
}
addToDiscoveredWorkspaces(workspaces: JsonProject[]) {
for (const workspace of workspaces) {
const index = this.config.discoveredWorkspaces.indexOf(workspace);
if (~index) {
this.config.discoveredWorkspaces[index] = workspace;
} else {
this.config.discoveredWorkspaces.push(workspace);
}
}
}
private updateCommands(forceDisable?: "disable") {
this.commandDisposables.forEach((disposable) => disposable.dispose());
this.commandDisposables = [];

1
editors/code/src/lsp_ext.ts
View file

@ -43,6 +43,7 @@ export const relatedTests = new lc.RequestType<lc.TextDocumentPositionParams, Te
"rust-analyzer/relatedTests"
);
export const reloadWorkspace = new lc.RequestType0<null, void>("rust-analyzer/reloadWorkspace");
export const runFlycheck = new lc.NotificationType<{
textDocument: lc.TextDocumentIdentifier | null;
}>("rust-analyzer/runFlycheck");

1
editors/code/src/main.ts
View file

@ -153,6 +153,7 @@ function createCommands(): Record<string, CommandFactory> {
memoryUsage: { enabled: commands.memoryUsage },
shuffleCrateGraph: { enabled: commands.shuffleCrateGraph },
reloadWorkspace: { enabled: commands.reloadWorkspace },
addProject: { enabled: commands.addProject },
matchingBrace: { enabled: commands.matchingBrace },
joinLines: { enabled: commands.joinLines },
parentModule: { enabled: commands.parentModule },

91
editors/code/src/rust_project.ts Normal file
View file

@ -0,0 +1,91 @@
interface JsonProject {
/// Path to the directory with *source code* of
/// sysroot crates.
///
/// It should point to the directory where std,
/// core, and friends can be found:
///
/// https://github.com/rust-lang/rust/tree/master/library.
///
/// If provided, rust-analyzer automatically adds
/// dependencies on sysroot crates. Conversely,
/// if you omit this path, you can specify sysroot
/// dependencies yourself and, for example, have
/// several different "sysroots" in one graph of
/// crates.
sysroot_src?: string;
/// The set of crates comprising the current
/// project. Must include all transitive
/// dependencies as well as sysroot crate (libstd,
/// libcore and such).
crates: Crate[];
}
interface Crate {
/// Optional crate name used for display purposes,
/// without affecting semantics. See the `deps`
/// key for semantically-significant crate names.
display_name?: string;
/// Path to the root module of the crate.
root_module: string;
/// Edition of the crate.
edition: "2015" | "2018" | "2021";
/// Dependencies
deps: Dep[];
/// Should this crate be treated as a member of
/// current "workspace".
///
/// By default, inferred from the `root_module`
/// (members are the crates which reside inside
/// the directory opened in the editor).
///
/// Set this to `false` for things like standard
/// library and 3rd party crates to enable
/// performance optimizations (rust-analyzer
/// assumes that non-member crates don't change).
is_workspace_member?: boolean;
/// Optionally specify the (super)set of `.rs`
/// files comprising this crate.
///
/// By default, rust-analyzer assumes that only
/// files under `root_module.parent` can belong
/// to a crate. `include_dirs` are included
/// recursively, unless a subdirectory is in
/// `exclude_dirs`.
///
/// Different crates can share the same `source`.
///
/// If two crates share an `.rs` file in common,
/// they *must* have the same `source`.
/// rust-analyzer assumes that files from one
/// source can't refer to files in another source.
source?: {
include_dirs: string[];
exclude_dirs: string[];
};
/// The set of cfgs activated for a given crate, like
/// `["unix", "feature=\"foo\"", "feature=\"bar\""]`.
cfg: string[];
/// Target triple for this Crate.
///
/// Used when running `rustc --print cfg`
/// to get target-specific cfgs.
target?: string;
/// Environment variables, used for
/// the `env!` macro
env: { [key: string]: string };
/// Whether the crate is a proc-macro crate.
is_proc_macro: boolean;
/// For proc-macro crates, path to compiled
/// proc-macro (.so file).
proc_macro_dylib_path?: string;
}
interface Dep {
/// Index of a crate in the `crates` array.
crate: number;
/// Name as should appear in the (implicit)
/// `extern crate name` declaration.
name: string;
}

17
editors/code/src/util.ts
View file

@ -150,9 +150,11 @@ export function memoizeAsync<Ret, TThis, Param extends string>(
/** Awaitable wrapper around `child_process.exec` */
export function execute(command: string, options: ExecOptions): Promise<string> {
log.info(`running command: ${command}`);
return new Promise((resolve, reject) => {
exec(command, options, (err, stdout, stderr) => {
if (err) {
log.error(err);
reject(err);
return;
}
@ -167,6 +169,21 @@ export function execute(command: string, options: ExecOptions): Promise<string>
});
}
export function executeDiscoverProject(command: string, options: ExecOptions): Promise<string> {
log.info(`running command: ${command}`);
return new Promise((resolve, reject) => {
exec(command, options, (err, stdout, _) => {
if (err) {
log.error(err);
reject(err);
return;
}
resolve(stdout.trimEnd());
});
});
}
export class LazyOutputChannel implements vscode.OutputChannel {
constructor(name: string) {
this.name = name;