Method start

src/omnisharp/server.ts:284–595

(launchTarget: LaunchTarget)

    // --- start, stop, and connect

    public async start(launchTarget: LaunchTarget): Promise<void> {
        if (this._state.status !== ServerState.Stopped) {
            this.eventStream.post(
                new ObservableEvents.OmnisharpServerOnServerError(
                    'Attempt to start OmniSharp server failed because another server instance is running.'
                )
            );
            return;
        }

        if (launchTarget.workspaceKind === LaunchTargetKind.LiveShare) {
            this.eventStream.post(
                new ObservableEvents.OmnisharpServerMessage(
                    'During Live Share sessions language services are provided by the Live Share server.'
                )
            );
            return;
        }

        if (!(await validateRequirements())) {
            this.eventStream.post(
                new ObservableEvents.OmnisharpServerMessage(
                    'OmniSharp failed to start because of missing requirements.'
                )
            );
            return;
        }

        const disposables = new CompositeDisposable();

        let engine: IEngine | undefined;
        if (omnisharpOptions.enableLspDriver) {
            engine = new LspEngine(
                this._eventBus,
                this.eventStream,
                this.context,
                // If we are in LSP mode, then we created an LogOutputChannel originally
                this.outputChannel as LogOutputChannel,
                disposables,
                this.languageMiddlewareFeature,
                this.platformInfo,
                this.monoResolver,
                this.dotnetResolver
            );
        } else {
            engine = new StdioEngine(
                this._eventBus,
                this.eventStream,
                this.platformInfo,
                this.monoResolver,
                this.dotnetResolver,
                disposables
            );
        }

        disposables.add(
            this.onServerError((err) => this.eventStream.post(new ObservableEvents.OmnisharpServerOnServerError(err)))
        );