Improve example helpers

Author: ehmicky

examples/convert.js

@@ -9,8 +9,8 @@
 'use strict'
 
 // Ignore the following line: this is only needed for internal purposes.
-// eslint-disable-next-line no-global-assign, fp/no-mutation
-require = require('./utils')
+// eslint-disable-next-line import/no-unassigned-import
+require('./utils')
 
 const { convert, positive } = require('unix-permissions')
 

examples/utils.js

@@ -1,17 +1,26 @@
 // Ignore this file, this is only needed for internal purposes.
-// We mock `require()` so that examples look the same as if the library
-// was directly installed.
+// We mock `require()` so that examples look the same as if the library was
+// directly installed.
 
-// eslint-disable-next-line filenames/match-exported
 'use strict'
 
+const Module = require('module')
+
 const { name } = require('../package')
 
-const mockedRequire = function(moduleName, ...args) {
-  // istanbul ignore next
-  const moduleNameA = moduleName === name ? `${__dirname}/..` : moduleName
-  // eslint-disable-next-line import/no-dynamic-require
-  return require(moduleNameA, ...args)
+const originalRequire = Module.prototype.require
+
+// eslint-disable-next-line fp/no-mutation, func-names
+Module.prototype.require = function(moduleName, ...args) {
+  const moduleNameA = getMockedName(moduleName)
+  // eslint-disable-next-line fp/no-this
+  return originalRequire.call(this, moduleNameA, ...args)
 }
 
-module.exports = mockedRequire
+const getMockedName = function(moduleName) {
+  if (moduleName !== name && !moduleName.startsWith(`${name}/`)) {
+    return moduleName
+  }
+
+  return moduleName.replace(name, `${__dirname}/..`)
+}

examples/utils.sh

@@ -1,11 +1,17 @@
 #!/usr/bin/env bash
 # Ignore this file, this is only needed for internal purposes.
-# We create an alias so that examples look the same as if the library was
-# directly installed.
 
-projectRoot="$(realpath "$(dirname "$BASH_SOURCE")/..")"
+dir="$(dirname "$BASH_SOURCE")"
+projectRoot="$(realpath "$dir/..")"
 binaryName="$(basename "$projectRoot")"
 pathToBinary="build/src/bin/index.js"
 
 shopt -s expand_aliases
+
+# We create an alias so that examples look the same as if the library was
+# directly installed.
 alias "$binaryName"="$projectRoot/$pathToBinary"
+
+# This mocks node's `-r` flag so that examples look the same as if the library
+# directly installed
+alias node="node -r $dir/utils"