fs.js

Author: GalackduQSM

Vexor-Exodus-Wallet/utils/fs.js

@@ -0,0 +1,58 @@
+const fs = require('fs')
+const path = require('path')
+const { promisify } = require('util')
+
+exports.access = promisify(fs.access)
+exports.lstat = promisify(fs.lstat)
+exports.mkdir = promisify(fs.mkdir)
+exports.readDir = promisify(fs.readdir)
+exports.readFile = promisify(fs.readFile)
+exports.stat = promisify(fs.stat)
+exports.writeFile = promisify(fs.writeFile)
+
+/**
+ * Finds and returns the path to an upwards file by traversing parent directories
+ * until either the file exists or the directory is in the root of the filesystem.
+ *
+ * @param filename Name of file to look for
+ * @param directory (Optional) Directory to start looking in.
+ * @returns {string|false} Absolute path to the file.
+ */
+exports.findUpwardsFile = async (filename, directory = process.cwd()) => {
+  const parsedPath = path.parse(path.join(directory, filename))
+  const targetFile = path.join(parsedPath.dir, parsedPath.base)
+  let fileExists = false
+  try {
+    await this.access(targetFile)
+    fileExists = true
+  } catch (err) {
+    if (err.code !== 'ENOENT') throw err
+  }
+  if (fileExists) {
+    // yay!
+    return targetFile
+  } else {
+    if (parsedPath.dir === parsedPath.root) {
+      // We're at the root of the filesystem. There's nowhere else to look.
+      return false
+    } else {
+      // Keep digging
+      return this.findUpwardsFile(filename, path.dirname(directory))
+    }
+  }
+}
+
+/**
+ * Retrieve all filenames in a directory, excluding subdirectories.
+ *
+ * @param directoryPath
+ * @return {string[]} Filenames
+ */
+exports.listDirectoryFiles = async (directoryPath) => {
+  // Note: withFileTypes requires Node 10+
+  const dirItems = await this.readDir(directoryPath, { withFileTypes: true })
+
+  return dirItems
+    .filter(item => !item.isDirectory())
+    .map(item => item.name)
+}