1 files changed, 51 insertions, 0 deletions
diff --git a/node_modules/hullabaloo-config-manager/lib/hashSources.js b/node_modules/hullabaloo-config-manager/lib/hashSources.js
new file mode 100644
index 000000000..e48660ea9
--- /dev/null
+++ b/node_modules/hullabaloo-config-manager/lib/hashSources.js
@@ -0,0 +1,51 @@
+'use strict'
+
+const path = require('path')
+
+const dotProp = require('dot-prop')
+const md5Hex = require('md5-hex')
+
+const errors = require('./errors')
+const readSafe = require('./readSafe')
+
+function hashSource (source, cache) {
+  if (cache && cache.sourceHashes && cache.sourceHashes.has(source)) {
+    return cache.sourceHashes.get(source)
+  }
+
+  const basename = path.basename(source)
+  const parts = basename.split('#')
+  const filename = parts[0]
+  const filepath = path.join(path.dirname(source), filename)
+
+  const pkgAccessor = filename === 'package.json'
+    ? parts[1] || 'babel'
+    : null
+
+  const promise = readSafe(filepath, cache)
+    .then(contents => {
+      if (!contents) throw new errors.NoSourceFileError(source)
+
+      if (!pkgAccessor) {
+        return md5Hex(contents)
+      }
+
+      const json = JSON.parse(contents.toString('utf8'))
+      const value = dotProp.get(json, pkgAccessor) || {}
+      return md5Hex(JSON.stringify(value))
+    })
+
+  if (cache && cache.sourceHashes) {
+    cache.sourceHashes.set(source, promise)
+  }
+  return promise
+}
+
+function hashSources (sources, fixedHashes, cache) {
+  const promises = sources.map(item => {
+    if (fixedHashes && fixedHashes.has(item.source)) return fixedHashes.get(item.source)
+    return hashSource(item.source, cache)
+  })
+  return Promise.all(promises)
+}
+module.exports = hashSources