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website/node_modules/npm/lib/install/decompose-actions.js

@@ -0,0 +1,79 @@
+'use strict'
+var validate = require('aproba')
+var npm = require('../npm.js')
+
+module.exports = function (differences, decomposed, next) {
+  validate('AAF', arguments)
+  differences.forEach((action) => {
+    var cmd = action[0]
+    var pkg = action[1]
+    switch (cmd) {
+      case 'add':
+        addSteps(decomposed, pkg)
+        break
+      case 'update':
+        updateSteps(decomposed, pkg)
+        break
+      case 'move':
+        moveSteps(decomposed, pkg)
+        break
+      case 'remove':
+        removeSteps(decomposed, pkg)
+        break
+      default:
+        defaultSteps(decomposed, cmd, pkg)
+    }
+  })
+  next()
+}
+
+function addAction (decomposed, action, pkg) {
+  if (decomposed.some((_) => _[0] === action && _[1] === pkg)) return
+  decomposed.push([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)
+  }
+  if (!pkg.fromBundle || npm.config.get('rebuild-bundle')) {
+    addAction(decomposed, 'preinstall', pkg)
+    addAction(decomposed, 'build', pkg)
+    addAction(decomposed, 'install', pkg)
+    addAction(decomposed, 'postinstall', pkg)
+  }
+  if (!pkg.fromBundle || !pkg.isLink) {
+    addAction(decomposed, 'finalize', pkg)
+  }
+  addAction(decomposed, 'refresh-package-json', pkg)
+}
+
+function updateSteps (decomposed, pkg) {
+  removeSteps(decomposed, pkg.oldPkg)
+  addSteps(decomposed, pkg)
+}
+
+function removeSteps (decomposed, pkg) {
+  addAction(decomposed, 'unbuild', pkg)
+  addAction(decomposed, 'remove', pkg)
+}
+
+function moveSteps (decomposed, pkg) {
+  addAction(decomposed, 'move', pkg)
+  addAction(decomposed, 'build', pkg)
+  addAction(decomposed, 'install', pkg)
+  addAction(decomposed, 'postinstall', pkg)
+  addAction(decomposed, 'refresh-package-json', pkg)
+}
+
+function defaultSteps (decomposed, cmd, pkg) {
+  addAction(decomposed, cmd, pkg)
+}