Improved Rubocop configuration and temp files

src/beautifiers/executable.coffee

@@ -153,7 +153,7 @@ class Executable
         @debug('env:', env)
         @debug('PATH:', env.PATH)
         @debug('args', args)
-        args = this.relativizePaths(args)
+        args = this.relativizePaths(args, cwd)
         @debug('relativized args', args)
 
         exe = exePath ? exeName
@@ -212,8 +212,7 @@ class Executable
     args = _.flatten(args)
     Promise.all(args)
 
-  relativizePaths: (args) ->
-    tmpDir = os.tmpDir()
+  relativizePaths: (args, tmpDir) ->
     newArgs = args.map((arg) ->
       isTmpFile = (typeof arg is 'string' and not arg.includes(':') and \
         path.isAbsolute(arg) and path.dirname(arg).startsWith(tmpDir))

src/beautifiers/rubocop.coffee

@@ -4,6 +4,9 @@ Requires https://github.com/bbatsov/rubocop
 
 "use strict"
 Beautifier = require('./beautifier')
+path = require('path')
+fs = require('fs')
+temp = require('temp').track()
 
 module.exports = class Rubocop extends Beautifier
   name: "Rubocop"
@@ -16,53 +19,70 @@ module.exports = class Rubocop extends Beautifier
       rubocop_path: true
   }
 
+  createTempFile: (originalFile) ->
+    new @Promise((resolve, reject) =>
+      tempOptions = {
+        prefix: "_beautify",
+        suffix: path.basename(originalFile),
+        dir: path.dirname(originalFile)}
+      temp.open(tempOptions, (err, info) =>
+        return reject(err) if err?
+        @debug('rubocopTempFile', info.path)
+        resolve(info.path)
+      )
+    ).disposer((filename) =>
+      if fs.existsSync(filename)
+        @debug("unlinking rubocop temp file", filename)
+        fs.unlink(filename)
+    )
+
   beautify: (text, language, options) ->
+    editor = atom?.workspace?.getActiveTextEditor()
+    if editor?
+      fullPath = editor.getPath()
+      projectPath = atom.project.relativizePath(fullPath)[0]
+    else
+      throw new Error("No active editor found!")
+
+    # Find the rubocop path
+    rubocopPath = "rubocop"
     @Promise.all([
       @which(options.rubocop_path) if options.rubocop_path
       @which('rubocop')
-    ]).then((paths) =>
+    ])
+    .then((paths) =>
       @debug('rubocop paths', paths)
-      _ = require 'lodash'
-      path = require 'path'
       # Get first valid, absolute path
-      rubocopPath = _.find(paths, (p) -> p and path.isAbsolute(p) )
+      rubocopPath = paths.find((p) -> p and path.isAbsolute(p))
       @verbose('rubocopPath', rubocopPath)
       @debug('rubocopPath', rubocopPath, paths)
+    )
 
-      configFile = path.join(atom.project.getPaths()[0], ".rubocop.yml")
-
-      fs = require 'fs'
-
-      if fs.existsSync(configFile)
-        @debug("rubocop", config, fs.readFileSync(configFile, 'utf8'))
-      else
+    # Find or generate a config file if non exists
+    configFile = @findFile(path.dirname(fullPath), ".rubocop.yml")
+    if !configFile?
       yaml = require("yaml-front-matter")
-        # Generate config file
       config = {
         "Style/IndentationWidth":
           "Width": options.indent_size
       }
+      tempConfig = @tempFile("rubocop-config", yaml.safeDump(config))
 
-        configFile = @tempFile("rubocop-config", yaml.safeDump(config))
-        @debug("rubocop", config, configFile)
-
-      # Check if PHP-CS-Fixer path was found
-      if rubocopPath?
-        @run(rubocopPath, [
-          "--auto-correct"
-          "--config", configFile
-          tempFile = @tempFile("temp", text, '.rb')
-          ], {ignoreReturnCode: true})
-          .then(=>
-            @readFile(tempFile)
+    @Promise.using(@createTempFile(fullPath), (tempFileName) =>
+      new @Promise((resolve, reject) ->
+        fs.writeFile(tempFileName, text, 'utf8', (err) ->
+          return reject(err) if err?
+          resolve tempFileName
         )
-      else
-        @run("rubocop", [
-          "--auto-correct"
-          "--config", configFile
-          tempFile = @tempFile("temp", text, '.rb')
-          ], {ignoreReturnCode: true})
-          .then(=>
-            @readFile(tempFile)
       )
-)
+      .then(=>
+        rubocopArguments = [
+          "--auto-correct"
+          "--force-exclusion"
+          tempFileName
+        ]
+        rubocopArguments.push("--config", tempConfig) if tempConfig?
+        @run(rubocopPath, rubocopArguments, {ignoreReturnCode: true, cwd: projectPath})
+      )
+      .then(=> @readFile(tempFileName))
+    )