Method declareOptionalDependency

lib/graph/ProjectGraph.js:201–212

* Declare a dependency from one project in the graph to another * * @public * @param {string} fromProjectName Name of the depending project * @param {string} toProjectName Name of project on which the other depends

(fromProjectName, toProjectName)

	 * @param {string} toProjectName Name of project on which the other depends
	 */
	declareOptionalDependency(fromProjectName, toProjectName) {
		this._checkSealed();
		try	{
			log.verbose(`Declaring optional dependency: ${fromProjectName} depends on ${toProjectName}`);
			this._declareDependency(this._optAdjList, fromProjectName, toProjectName);
			this._hasUnresolvedOptionalDependencies = true;
		} catch (err) {
			throw new Error(
				`Failed to declare optional dependency from project ${fromProjectName} to ${toProjectName}: ` +
				err.message);
		}
	}

	/**
	 * Declare a dependency from one project in the graph to another