use node path module

Author: krvajal

src/features/linter-provider.ts

@@ -3,7 +3,7 @@
 import * as path from 'path';
 import * as cp from 'child_process';
 import ChildProcess = cp.ChildProcess;
-import { getIncludeParams, LANGUAGE_ID, extract_path } from '../lib/helper';
+import { getIncludeParams, LANGUAGE_ID } from '../lib/helper';
 
 import * as vscode from 'vscode';
 
@@ -29,7 +29,7 @@ export default class FortranLintingProvider {
         let command = this.getGfortranPath();
         let argList = this.constructArgumentList(textDocument);
 
-        let filePath  = extract_path(textDocument.fileName);
+        let filePath  = path.parse(textDocument.fileName).dir;
         let childProcess = cp.spawn(command, argList, {cwd: filePath});
 
         if (childProcess.pid) {

src/lib/helper.ts

@@ -1,8 +1,8 @@
 
 import * as fs from 'fs';
 import * as vscode from 'vscode';
-let path = require('path');
-const fileSep = path.sep;
+
+
 
 export const LANGUAGE_ID = 'fortran90';
 
@@ -109,8 +109,3 @@ let saveKeywordToJson = (keyword) => {
     });
 };   
 
-export const extract_path = (file: string) => {
-
-    let pos = file.lastIndexOf(fileSep);
-    return file.substring(0, pos);
-};