export async function goBuild()

in src/goBuild.ts [72:176]
94 lines of code
24 McCabe index (conditional complexity)

export async function goBuild(
	fileUri: vscode.Uri,
	isMod: boolean,
	goConfig: vscode.WorkspaceConfiguration,
	buildWorkspace?: boolean
): Promise<ICheckResult[]> {
	epoch++;
	const closureEpoch = epoch;
	if (tokenSource) {
		if (running) {
			tokenSource.cancel();
		}
		tokenSource.dispose();
	}
	tokenSource = new vscode.CancellationTokenSource();
	const updateRunning = () => {
		if (closureEpoch === epoch) {
			running = false;
		}
	};

	const currentWorkspace = getWorkspaceFolderPath(fileUri);
	const cwd = buildWorkspace && currentWorkspace ? currentWorkspace : path.dirname(fileUri.fsPath);
	if (!path.isAbsolute(cwd)) {
		return Promise.resolve([]);
	}

	// Skip building if cwd is in the module cache
	if (isMod && cwd.startsWith(getModuleCache())) {
		return [];
	}

	const buildEnv = toolExecutionEnvironment();
	const tmpPath = getTempFilePath('go-code-check');
	const isTestFile = fileUri && fileUri.fsPath.endsWith('_test.go');
	const buildFlags: string[] = isTestFile
		? getTestFlags(goConfig)
		: Array.isArray(goConfig['buildFlags'])
		? [...goConfig['buildFlags']]
		: [];
	const buildArgs: string[] = isTestFile ? ['test', '-c'] : ['build'];

	if (goConfig['installDependenciesWhenBuilding'] === true && !isMod) {
		buildArgs.push('-i');
		// Remove the -i flag from user as we add it anyway
		if (buildFlags.indexOf('-i') > -1) {
			buildFlags.splice(buildFlags.indexOf('-i'), 1);
		}
	}
	buildArgs.push(...buildFlags);
	if (goConfig['buildTags'] && buildFlags.indexOf('-tags') === -1) {
		buildArgs.push('-tags');
		buildArgs.push(goConfig['buildTags']);
	}

	if (buildWorkspace && currentWorkspace && !isTestFile) {
		outputChannel.appendLine(`Starting building the current workspace at ${currentWorkspace}`);
		return getNonVendorPackages(currentWorkspace).then((pkgs) => {
			running = true;
			return runTool(
				buildArgs.concat(Array.from(pkgs.keys())),
				currentWorkspace,
				'error',
				true,
				null,
				buildEnv,
				true,
				tokenSource.token
			).then((v) => {
				updateRunning();
				return v;
			});
		});
	}

	outputChannel.appendLine(`Starting building the current package at ${cwd}`);

	const currentGoWorkspace = getCurrentGoWorkspaceFromGOPATH(getCurrentGoPath(), cwd);
	let importPath = '.';
	if (!isMod) {
		// Find the right importPath instead of directly using `.`. Fixes https://github.com/Microsoft/vscode-go/issues/846
		if (currentGoWorkspace && !isMod) {
			importPath = cwd.substr(currentGoWorkspace.length + 1);
		} else {
			outputChannel.appendLine(
				`Not able to determine import path of current package by using cwd: ${cwd} and Go workspace: ${currentGoWorkspace}`
			);
		}
	}

	running = true;
	return runTool(
		buildArgs.concat('-o', tmpPath, importPath),
		cwd,
		'error',
		true,
		null,
		buildEnv,
		true,
		tokenSource.token
	).then((v) => {
		updateRunning();
		return v;
	});
}