set working dir of spawn function

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 } from '../lib/helper';
+import { getIncludeParams, LANGUAGE_ID, extract_path } from '../lib/helper';
 
 import * as vscode from 'vscode';
 
@@ -28,8 +28,9 @@ export default class FortranLintingProvider {
         let diagnostics: vscode.Diagnostic[] = [];
         let command = this.getGfortranPath();
         let argList = this.constructArgumentList(textDocument);
-
-        let childProcess = cp.spawn(command, argList);
+    
+        let filePath  = extract_path(textDocument.fileName);
+        let childProcess = cp.spawn(command, argList, {cwd: filePath});
 
         if (childProcess.pid) {
             childProcess.stdout.on('data', (data: Buffer) => {

src/lib/helper.ts

@@ -1,7 +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';
 
@@ -106,4 +107,10 @@ let saveKeywordToJson = (keyword) => {
         if (err) throw err;
         console.log('Saved!');
     });
-};   
+};   
+
+export const extract_path = (file: string) => {
+
+    let pos = file.lastIndexOf(fileSep);
+    return file.substring(0, pos);
+};