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|
import * as child_process from 'child_process';
import * as fs from 'fs';
import * as path from 'path';
import * as vscode from 'vscode';
import { Server } from '../server';
import { terminate } from '../utils/processes';
import { LineBuffer } from './line_buffer';
import { StatusDisplay } from './watch_status';
export class CargoWatchProvider {
private diagnosticCollection?: vscode.DiagnosticCollection;
private cargoProcess?: child_process.ChildProcess;
private outBuffer: string = '';
private statusDisplay?: StatusDisplay;
private outputChannel?: vscode.OutputChannel;
public activate(subscriptions: vscode.Disposable[]) {
let cargoExists = false;
const cargoTomlFile = path.join(
vscode.workspace.rootPath!,
'Cargo.toml'
);
// Check if the working directory is valid cargo root path
try {
if (fs.existsSync(cargoTomlFile)) {
cargoExists = true;
}
} catch (err) {
cargoExists = false;
}
if (!cargoExists) {
vscode.window.showErrorMessage(
`Couldn\'t find \'Cargo.toml\' in ${cargoTomlFile}`
);
return;
}
subscriptions.push(this);
this.diagnosticCollection = vscode.languages.createDiagnosticCollection(
'rustc'
);
this.statusDisplay = new StatusDisplay(subscriptions);
this.outputChannel = vscode.window.createOutputChannel(
'Cargo Watch Trace'
);
let args = '"check --message-format json';
if (Server.config.cargoWatchOptions.checkArguments.length > 0) {
// Excape the double quote string:
args += ' ' + Server.config.cargoWatchOptions.checkArguments;
}
args += '"';
// Start the cargo watch with json message
this.cargoProcess = child_process.spawn(
'cargo',
['watch', '-x', args],
{
stdio: ['ignore', 'pipe', 'pipe'],
cwd: vscode.workspace.rootPath,
windowsVerbatimArguments: true
}
);
const stdoutData = new LineBuffer();
this.cargoProcess.stdout.on('data', (s: string) => {
stdoutData.processOutput(s, line => {
this.logInfo(line);
try {
this.parseLine(line);
} catch (err) {
this.logError(`Failed to parse: ${err}, content : ${line}`);
}
});
});
const stderrData = new LineBuffer();
this.cargoProcess.stderr.on('data', (s: string) => {
stderrData.processOutput(s, line => {
this.logError('Error on cargo-watch : {\n' + line + '}\n');
});
});
this.cargoProcess.on('error', (err: Error) => {
this.logError(
'Error on cargo-watch process : {\n' + err.message + '}\n'
);
});
this.logInfo('cargo-watch started.');
}
public dispose(): void {
if (this.diagnosticCollection) {
this.diagnosticCollection.clear();
this.diagnosticCollection.dispose();
}
if (this.cargoProcess) {
this.cargoProcess.kill();
terminate(this.cargoProcess);
}
if (this.outputChannel) {
this.outputChannel.dispose();
}
}
private logInfo(line: string) {
if (Server.config.cargoWatchOptions.trace === 'verbose') {
this.outputChannel!.append(line);
}
}
private logError(line: string) {
if (
Server.config.cargoWatchOptions.trace === 'error' ||
Server.config.cargoWatchOptions.trace === 'verbose'
) {
this.outputChannel!.append(line);
}
}
private parseLine(line: string) {
if (line.startsWith('[Running')) {
this.diagnosticCollection!.clear();
this.statusDisplay!.show();
}
if (line.startsWith('[Finished running')) {
this.statusDisplay!.hide();
}
function getLevel(s: string): vscode.DiagnosticSeverity {
if (s === 'error') {
return vscode.DiagnosticSeverity.Error;
}
if (s.startsWith('warn')) {
return vscode.DiagnosticSeverity.Warning;
}
return vscode.DiagnosticSeverity.Information;
}
// Reference:
// https://github.com/rust-lang/rust/blob/master/src/libsyntax/json.rs
interface RustDiagnosticSpan {
line_start: number;
line_end: number;
column_start: number;
column_end: number;
is_primary: boolean;
file_name: string;
}
interface RustDiagnostic {
spans: RustDiagnosticSpan[];
rendered: string;
level: string;
code?: {
code: string;
};
}
interface CargoArtifact {
reason: string;
package_id: string;
}
// https://github.com/rust-lang/cargo/blob/master/src/cargo/util/machine_message.rs
interface CargoMessage {
reason: string;
package_id: string;
message: RustDiagnostic;
}
// cargo-watch itself output non json format
// Ignore these lines
let data: CargoMessage;
try {
data = JSON.parse(line.trim());
} catch (error) {
this.logError(`Fail to parse to json : { ${error} }`);
return;
}
if (data.reason === 'compiler-artifact') {
const msg = data as CargoArtifact;
// The format of the package_id is "{name} {version} ({source_id})",
// https://github.com/rust-lang/cargo/blob/37ad03f86e895bb80b474c1c088322634f4725f5/src/cargo/core/package_id.rs#L53
this.statusDisplay!.packageName = msg.package_id.split(' ')[0];
} else if (data.reason === 'compiler-message') {
const msg = data.message as RustDiagnostic;
const spans = msg.spans.filter(o => o.is_primary);
// We only handle primary span right now.
if (spans.length > 0) {
const o = spans[0];
const rendered = msg.rendered;
const level = getLevel(msg.level);
const range = new vscode.Range(
new vscode.Position(o.line_start - 1, o.column_start - 1),
new vscode.Position(o.line_end - 1, o.column_end - 1)
);
const fileName = path.join(
vscode.workspace.rootPath!,
o.file_name
);
const diagnostic = new vscode.Diagnostic(
range,
rendered,
level
);
diagnostic.source = 'rustc';
diagnostic.code = msg.code ? msg.code.code : undefined;
diagnostic.relatedInformation = [];
const fileUrl = vscode.Uri.file(fileName!);
const diagnostics: vscode.Diagnostic[] = [
...(this.diagnosticCollection!.get(fileUrl) || [])
];
diagnostics.push(diagnostic);
this.diagnosticCollection!.set(fileUrl, diagnostics);
}
}
}
}
|
