1 files changed, 133 insertions, 0 deletions
diff --git a/node_modules/hullabaloo-config-manager/lib/resolvePluginsAndPresets.js b/node_modules/hullabaloo-config-manager/lib/resolvePluginsAndPresets.js
new file mode 100644
index 000000000..b72ab4090
--- /dev/null
+++ b/node_modules/hullabaloo-config-manager/lib/resolvePluginsAndPresets.js
@@ -0,0 +1,133 @@
+'use strict'
+
+const path = require('path')
+
+const ExtendableError = require('es6-error')
+const pkgDir = require('pkg-dir')
+const resolveFrom = require('resolve-from')
+
+class ResolveError extends ExtendableError {
+  constructor (source, kind, ref) {
+    super(`${source}: Couldn't find ${kind} ${JSON.stringify(ref)} relative to directory`)
+    this.source = source
+    this.ref = ref
+    this.isPlugin = kind === 'plugin'
+    this.isPreset = kind === 'preset'
+  }
+}
+
+function normalize (arr) {
+  if (!Array.isArray(arr)) return []
+
+  return arr.map(item => Array.isArray(item) ? item[0] : item)
+}
+
+function isFilePath (ref) {
+  return path.isAbsolute(ref) || ref.startsWith('./') || ref.startsWith('../')
+}
+
+function resolveName (name, fromDir, cache) {
+  if (cache.has(name)) return cache.get(name)
+
+  const filename = resolveFrom(fromDir, name)
+  cache.set(name, filename)
+  return filename
+}
+
+function resolvePackage (filename, fromFile) {
+  if (fromFile) return null
+
+  return pkgDir.sync(filename)
+}
+
+function resolvePluginsAndPresets (chains, sharedCache) {
+  const dirCaches = (sharedCache && sharedCache.pluginsAndPresets) || new Map()
+  const getCache = dir => {
+    if (dirCaches.has(dir)) return dirCaches.get(dir)
+
+    const cache = new Map()
+    dirCaches.set(dir, cache)
+    return cache
+  }
+
+  const byConfig = new Map()
+  for (const chain of chains) {
+    for (const config of chain) {
+      if (byConfig.has(config)) continue
+
+      const plugins = new Map()
+      const presets = new Map()
+      byConfig.set(config, { plugins, presets })
+
+      const fromDir = config.dir
+      const cache = getCache(fromDir)
+      const resolve = (kind, ref) => {
+        const possibleNames = []
+        if (isFilePath(ref)) {
+          possibleNames.push({ fromFile: true, name: ref })
+        } else {
+          if (kind === 'plugin') {
+            // Expand possible plugin names, see
+            // https://github.com/babel/babel/blob/510e93b2bd434f05c816fe6639137b35bac267ed/packages/babel-core/src/helpers/get-possible-plugin-names.js
+
+            // Babel doesn't expand scoped plugin references. @ is only valid at
+            // the start of a package name, so disregard refs that would result
+            // in `babel-plugin-@scope/name`.
+            if (!ref.startsWith('@')) {
+              const name = `babel-plugin-${ref}`
+              possibleNames.push({ fromFile: false, name })
+            }
+          } else {
+            // Expand possible preset names, see
+            // https://github.com/babel/babel/blob/510e93b2bd434f05c816fe6639137b35bac267ed/packages/babel-core/src/helpers/get-possible-preset-names.js
+
+            if (ref.startsWith('@')) {
+              const matches = /^(@.+?)\/([^/]+)(.*)/.exec(ref)
+              const scope = matches[1]
+              const partialName = matches[2]
+              const remainder = matches[3]
+
+              const name = `${scope}/babel-preset-${partialName}${remainder}`
+              possibleNames.push({ fromFile: false, name })
+            } else {
+              const name = `babel-preset-${ref}`
+              possibleNames.push({ fromFile: false, name })
+            }
+          }
+
+          possibleNames.push({ fromFile: false, name: ref })
+        }
+
+        let entry = null
+        for (const possibility of possibleNames) {
+          const filename = resolveName(possibility.name, fromDir, cache)
+          if (filename) {
+            const fromPackage = resolvePackage(filename, possibility.fromFile)
+            entry = { filename, fromPackage }
+            break
+          }
+        }
+        if (!entry) {
+          throw new ResolveError(config.source, kind, ref)
+        }
+
+        if (kind === 'plugin') {
+          plugins.set(ref, entry)
+        } else {
+          presets.set(ref, entry)
+        }
+      }
+
+      for (const ref of normalize(config.options.plugins)) {
+        resolve('plugin', ref)
+      }
+      for (const ref of normalize(config.options.presets)) {
+        resolve('preset', ref)
+      }
+    }
+  }
+
+  return byConfig
+}
+
+module.exports = resolvePluginsAndPresets