export function getCurrentGoPath()

in src/util.ts [513:551]
32 lines of code
19 McCabe index (conditional complexity)

export function getCurrentGoPath(workspaceUri?: vscode.Uri): string {
	const activeEditorUri = vscode.window.activeTextEditor?.document.uri;
	const currentFilePath = fixDriveCasingInWindows(activeEditorUri?.fsPath ?? '');
	const currentRoot = (workspaceUri && workspaceUri.fsPath) || getWorkspaceFolderPath(activeEditorUri) || '';
	const config = getGoConfig(workspaceUri || activeEditorUri);

	// Infer the GOPATH from the current root or the path of the file opened in current editor
	// Last resort: Check for the common case where GOPATH itself is opened directly in VS Code
	let inferredGopath: string | undefined;
	if (config['inferGopath'] === true) {
		inferredGopath = getInferredGopath(currentRoot) || getInferredGopath(currentFilePath);
		if (!inferredGopath) {
			try {
				if (fs.statSync(path.join(currentRoot, 'src')).isDirectory()) {
					inferredGopath = currentRoot;
				}
			} catch (e) {
				// No op
			}
		}
		if (inferredGopath) {
			// inferred GOPATH must not have go.mod in it.
			try {
				if (fs.existsSync(path.join(inferredGopath, 'go.mod'))) {
					inferredGopath = '';
				}
			} catch (e) {
				// No op
			}
		}
		if (inferredGopath && process.env['GOPATH'] && inferredGopath !== process.env['GOPATH']) {
			inferredGopath += path.delimiter + process.env['GOPATH'];
		}
	}

	const configGopath = config['gopath'] ? resolvePath(substituteEnv(config['gopath']), currentRoot) : '';
	currentGopath = (inferredGopath ? inferredGopath : configGopath || process.env['GOPATH']) ?? '';
	return currentGopath;
}