decompose-actions: Ensure sources for bundled modules exist

Credit: @iarna

Author: iarna

lib/install/decompose-actions.js

@@ -33,6 +33,13 @@ function addAction (decomposed, action, pkg) {
 }
 
 function addSteps (decomposed, pkg) {
+ if (pkg.fromBundle) {
+ // make sure our source module exists to extract ourselves from
+ // if we're installing our source module anyway, the duplication
+ // of these steps will be elided by `addAction` automatically
+ addAction(decomposed, 'fetch', pkg.fromBundle)
+ addAction(decomposed, 'extract', pkg.fromBundle)
+ }
  if (!pkg.fromBundle && !pkg.isLink) {
  addAction(decomposed, 'fetch', pkg)
  addAction(decomposed, 'extract', pkg)