'Global ESLint/.eslintrc Path' does not seem to be applied on Windows #1354

Issue Type

Bug

Issue Description

I installed ESLint globally and enabled the 'Global ESLint/Use global ESLint installation' checkbox. There is no local ESLint installed. Configuration looks like this:

When '.eslintrc Path' is /.eslintrc.js as shown in the image, the config file is able to load correctly. C:/.eslintrc.js and C:\.eslintrc.js works as well.

However it seems to have trouble when the file is inside a subdirectory. If I put the config file in C:/Config/ and set the path as /Config/.eslintrc.js, the config file is no longer loaded. Neither do C:/Config/.eslintrc.js nor C:\Config\.eslintrc.js work.

Strangely, if you leave .eslintrc.js under C:\.eslintrc.js, and set the path as anything else (e.g. /Config/.eslintrc.js, C:\.eslintrc.js is still loaded. This is leading me to suspect that the option 'Global ESLint/.eslintrc Path' is not applied at all, and hard-coded /.eslintrc.js is being applied regardless.

Bug Checklist

• Restart Atom
• N/A Verify the eslint CLI gives the proper result, while linter-eslint does not
• Paste the output of the Linter Eslint: Debug command from the Command Palette below

Linter Eslint: Debug output:

When C:/.eslintrc.js exists and path is /.eslintrc.js:

Atom version: 1.46.0
linter-eslint version: 8.5.5
ESLint version: 6.8.0
Hours since last Atom restart: 0
Platform: win32
Using global ESLint from: C:\Users\XXXXX\AppData\Roaming\npm\node_modules\eslint
Current file's scopes: [
  "source.js",
  "string.quoted.double.js"
]
linter-eslint configuration: {
  "disabling": {
    "disableWhenNoEslintConfig": true,
    "rulesToSilenceWhileTyping": []
  },
  "global": {
    "eslintrcPath": "/.eslintrc.js",
    "useGlobalEslint": true,
    "globalNodePath": ""
  },
  "scopes": [
    "source.js",
    "source.jsx",
    "source.js.jsx",
    "source.flow",
    "source.babel",
    "source.js-semantic"
  ],
  "lintHtmlFiles": false,
  "autofix": {
    "fixOnSave": false,
    "ignoreFixableRulesWhileTyping": false,
    "rulesToDisableWhileFixing": []
  },
  "advanced": {
    "disableEslintIgnore": false,
    "disableFSCache": false,
    "showRuleIdInMessage": true,
    "eslintRulesDirs": [],
    "localNodeModules": ""
  }
}

When C:/.eslintrc.js exists and path is /Config/.eslintrc.js:

Same as above

When C:/.eslintrc.js does not exist and path is /Config/.eslintrc.js:

Command errors on execution: