com.google.javascript.jscomp

Class FindModuleDependencies

java.lang.Object

com.google.javascript.jscomp.NodeTraversal.AbstractPostOrderCallback

com.google.javascript.jscomp.FindModuleDependencies

All Implemented Interfaces:

NodeTraversal.Callback

public class FindModuleDependencies
extends NodeTraversal.AbstractPostOrderCallback

Find and update any direct dependencies of an input. Used to walk the dependency graph and support a strict depth-first dependency ordering. Marks an input as providing its module name.

Discovers dependencies from:

• goog.require calls
• ES6 import statements
• CommonJS require statements

The order of dependency references is preserved so that a deterministic depth-first ordering can be achieved.

Author:

[email protected] (Chad Killingsworth)

Method Summary

Modifier and Type	Method and Description
boolean	convertToEs6Module(Node root) Convert a script into a module by marking it's root node as a module body.
void	process(Node root)
void	visit(NodeTraversal t, Node n, Node parent) Visits a node in postorder (after its children have been visited).

Methods inherited from class com.google.javascript.jscomp.NodeTraversal.AbstractPostOrderCallback

shouldTraverse

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

process

public void process(Node root)

visit

public void visit(NodeTraversal t,
                  Node n,
                  Node parent)

Description copied from interface: NodeTraversal.Callback

Visits a node in postorder (after its children have been visited). A node is visited only if all its parents should be traversed (NodeTraversal.Callback.shouldTraverse(NodeTraversal, Node, Node)).

Implementations can have side effects (e.g. modifying the parse tree).

convertToEs6Module

public boolean convertToEs6Module(Node root)

Convert a script into a module by marking it's root node as a module body. This allows a script which is imported as a module to be scoped as a module even without "import" or "export" statements. Fails if the file contains a goog.provide or goog.module.

Returns:

True, if the file is now an ES6 module. False, if the file must remain a script.