Reporting command output to language server clients

[guw]

As part of the Bazel extension we are executing Bazel commands. In Eclipse I am using the Eclipse Console View to show command execution including command output to users. This happens in addition to a Job showing unknown progress in the Progress View.

I noticed that jobs are reported to clients using events/progress reporting between JDTLS and a language client. Is there any mechanism in JDTLS to report command execution and its output (including Ansi escape codes) to a language client?

I do have a VS Code extension and could plug into VS Code terminal to create a custom terminal (similar to what I do in the Eclipse UI). However, I am wondering how to get the output from JDTLS via the existing language server client communication channel. I'd like to avoid opening a separate socket unless this is the only way?

[rgrunber]

Are these commands being run as part of the project import / build support contributions the Bazel extension contributes ? If so, most of the methods you might implement in those classes (eg. importToWorkspace(..), update(..), etc.) will have an IProgressMonitor being passed in. That progress monitor originates from the runInWorkspace(IProgressMonitor) implementation of a WorkspaceJob. If you look at

eclipse.jdt.ls/org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/LanguageServerApplication.java

Line 62 in 93682aa

Job.getJobManager().setProgressProvider(progressReporterManager);

you'll see we control the progress reporters allocated for jobs, and the ones we create always report progress back to the language server (except for jobs set as "system" jobs) :

eclipse.jdt.ls/org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/handlers/ProgressReporterManager.java

Lines 213 to 217 in 93682aa

	@Override
	public void worked(int work) {
	progress += work;
	sendProgress();
	}

So it should be possible to just report progress on those monitors. You can create a sub-monitor, change the task name and report progress that way.