use decache when resolving config

Author: Brad Cornes

packages/tailwindcss-class-names/package-lock.json

@@ -12,6 +12,7 @@
   "author": "Brad Cornes <hello@bradley.dev>",
   "license": "MIT",
   "dependencies": {
+    "callsite": "^1.0.0",
     "chokidar": "^3.3.1",
     "dlv": "^1.1.3",
     "dset": "^2.0.1",

packages/tailwindcss-class-names/package.json

@@ -0,0 +1,84 @@
+import * as path from 'path' // if module is locally defined we path.resolve it
+import callsite from 'callsite'
+import Module from 'module'
+
+function find(moduleName) {
+  if (moduleName[0] === '.') {
+    var stack = callsite()
+    for (var i in stack) {
+      var filename = stack[i].getFileName()
+      // if (filename !== module.filename) {
+      moduleName = path.resolve(path.dirname(filename), moduleName)
+      break
+      // }
+    }
+  }
+  try {
+    return __non_webpack_require__.resolve(moduleName)
+  } catch (e) {
+    return
+  }
+}
+
+/**
+ * Removes a module from the cache. We need this to re-load our http_request !
+ * see: http://stackoverflow.com/a/14801711/1148249
+ */
+function decache(moduleName) {
+  moduleName = find(moduleName)
+
+  if (!moduleName) {
+    return
+  }
+
+  // Run over the cache looking for the files
+  // loaded by the specified module name
+  searchCache(moduleName, function(mod) {
+    delete __non_webpack_require__.cache[mod.id]
+  })
+
+  // Remove cached paths to the module.
+  // Thanks to @bentael for pointing this out.
+  Object.keys(Module.prototype.constructor._pathCache).forEach(function(
+    cacheKey
+  ) {
+    if (cacheKey.indexOf(moduleName) > -1) {
+      delete Module.prototype.constructor._pathCache[cacheKey]
+    }
+  })
+}
+
+/**
+ * Runs over the cache to search for all the cached
+ * files
+ */
+function searchCache(moduleName, callback) {
+  // Resolve the module identified by the specified name
+  var mod = __non_webpack_require__.resolve(moduleName)
+  var visited = {}
+
+  // Check if the module has been resolved and found within
+  // the cache no else so #ignore else http://git.io/vtgMI
+  /* istanbul ignore else */
+  if (mod && (mod = __non_webpack_require__.cache[mod]) !== undefined) {
+    // Recursively go over the results
+    ;(function run(current) {
+      visited[current.id] = true
+      // Go over each of the module's children and
+      // run over it
+      current.children.forEach(function(child) {
+        // ignore .node files, decachine native modules throws a
+        // "module did not self-register" error on second require
+        if (path.extname(child.filename) !== '.node' && !visited[child.id]) {
+          run(child)
+        }
+      })
+
+      // Call the specified callback providing the
+      // found module
+      callback(current)
+    })(mod)
+  }
+}
+
+export default decache

packages/tailwindcss-class-names/src/decache.js

@@ -1,5 +1,6 @@
 import importFrom from 'import-from'
 import * as path from 'path'
+import decache from './decache'
 
 export default function resolveConfig({ cwd, config }) {
   let resolve = x => x
@@ -8,6 +9,7 @@ export default function resolveConfig({ cwd, config }) {
     if (!cwd) {
       cwd = path.dirname(config)
     }
+    decache(config)
     config = __non_webpack_require__(config)
   }