🆕 Port more helpers to babel

Author: steelbrain

src/helpers.js

@@ -4,8 +4,7 @@ import Path from 'path'
 import FS from 'fs'
 import ChildProcess from 'child_process'
 import CP from 'childprocess-promise'
-
-export const bundledEslintPath = Path.join(FS.realpathSync(Path.join(__dirname, '..')), 'node_modules', 'eslint')
+import {findFile} from 'atom-linter'
 
 export function spawnWorker() {
   let shouldLive = true
@@ -39,7 +38,7 @@ export function spawnWorker() {
   }}}
 }
 
-export function getCliFromPath(path) {
+export function getCliFromDirectory(path) {
   try {
     return require(Path.join(path, 'lib', 'cli.js'))
   } catch (e) {
@@ -48,3 +47,46 @@ export function getCliFromPath(path) {
     } else throw e
   }
 }
+
+let nodePrefixPath = null
+
+export function getNodePrefixPath() {
+  if (nodePrefixPath === null) {
+    const npmCommand = process.platform === 'win32' ? 'npm.cmd' : 'npm'
+    try {
+      nodePrefixPath = ChildProcess.spawnSync(npmCommand, ['get', 'prefix']).output[1].toString().trim()
+    } catch (e) {
+      throw new Error('Unable to execute `npm get prefix`. Please make sure Atom is getting $PATH correctly')
+    }
+  }
+  return nodePrefixPath
+}
+
+let bundledEslintDirectory = null
+
+export function getBundledEslintDirectory() {
+  if (bundledEslintDirectory === null) {
+    bundledEslintDirectory = Path.join(FS.realpathSync(Path.join(__dirname, '..')), 'node_modules', 'eslint')
+  }
+  return bundledEslintDirectory
+}
+
+export function getEslintDirectory(params) {
+  if (params.global) {
+    const prefixPath = getNodePrefixPath()
+    if (process.platform === 'win32') {
+      return Path.join(params.nodePath || prefixPath, 'node_modules', 'eslint')
+    } else {
+      return Path.join(params.nodePath || prefixPath, 'lib', 'node_modules', 'eslint')
+    }
+  } else {
+    const modulesPath = findFile(params.fileDir, 'node_modules')
+    const eslintPath = Path.join(modulesPath, 'eslint')
+    try {
+      FS.accessSync(eslintPath, FS.R_OK)
+      return eslintPath
+    } catch (_) {
+      return getBundledEslintDirectory()
+    }
+  }
+}