chore(lint): use isexe module

package.json

@@ -120,6 +120,7 @@
     "inquirer": "^6.5.1",
     "inquirer-autocomplete-prompt": "^1.0.1",
     "is-docker": "^2.0.0",
+    "isexe": "^2.0.0",
     "jwt-decode": "^3.0.0",
     "lambda-local": "^1.7.1",
     "lodash.debounce": "^4.0.8",

src/lib/exec-fetcher.js

@@ -1,9 +1,9 @@
 const path = require('path')
 const execa = require('execa')
 const { fetchLatest, updateAvailable } = require('gh-release-fetch')
+const isExe = require('isexe')
 
 const { NETLIFYDEVWARN } = require('../utils/logo')
-const fs = require('./fs')
 
 const isWindows = () => {
   return process.platform === 'win32'
@@ -25,27 +25,6 @@ const getOptions = () => {
   }
 }
 
-const isExe = (mode, gid, uid) => {
-  if (isWindows()) {
-    return true
-  }
-
-  const isGroup = gid ? process.getgid && gid === process.getgid() : true
-  const isUser = uid ? process.getuid && uid === process.getuid() : true
-
-  return Boolean(mode & 0o0001 || (mode & 0o0010 && isGroup) || (mode & 0o0100 && isUser))
-}
-
-const execExist = async (binPath) => {
-  try {
-    const stat = await fs.statAsync(binPath)
-    return stat.isFile() && isExe(stat.mode, stat.gid, stat.uid)
-  } catch (error) {
-    if (error.code === 'ENOENT') return false
-    throw error
-  }
-}
-
 const isVersionOutdated = async ({ packageName, currentVersion }) => {
   const options = getOptions()
   const outdated = await updateAvailable(getRepository({ packageName }), currentVersion, options)
@@ -55,7 +34,7 @@ const isVersionOutdated = async ({ packageName, currentVersion }) => {
 const shouldFetchLatestVersion = async ({ binPath, packageName, execName, execArgs, pattern, log }) => {
   const execPath = path.join(binPath, getExecName({ execName }))
 
-  const exists = await execExist(execPath)
+  const exists = await isExe(execPath, { ignoreErrors: true })
   if (!exists) {
     return true
   }