versions() added java, python3, optimized gcc

lib/index.d.ts

@@ -222,6 +222,8 @@ export namespace Systeminformation {
     postgresql: string;
     perl: string;
     python: string;
+    python3: string;
+    java: string;
     gcc: string;
   }
 

lib/osinfo.js

@@ -331,11 +331,13 @@ function versions(callback) {
         postgresql: '',
         perl: '',
         python: '',
+        python3: '',
+        java: '',
         gcc: ''
       };
 
       let functionProcessed = (function () {
-        let totalFunctions = 20;
+        let totalFunctions = 21;
         return function () {
           if (--totalFunctions === 0) {
             if (callback) {
@@ -555,11 +557,39 @@ function versions(callback) {
           }
           functionProcessed();
         });
+        exec('python3 -V 2>&1', function (error, stdout) {
+          if (!error) {
+            const python = stdout.toString().split('\n')[0] || '';
+            result.python3 = python.toLowerCase().replace('python', '').trim();
+          }
+          functionProcessed();
+        });
+        exec('java -version 2>&1', function (error, stdout) {
+          if (!error) {
+            const java = stdout.toString().split('\n')[0] || '';
+            const parts = java.split('"');
+            result.java = parts.length === 3 ? parts[1].trim() : '';
+          }
+          functionProcessed();
+        });
         exec('gcc -dumpversion', function (error, stdout) {
           if (!error) {
             result.gcc = stdout.toString().split('\n')[0].trim() || '';
           }
-          functionProcessed();
+          if (result.gcc.indexOf('.') > -1) {
+            functionProcessed();
+          } else {
+            exec('gcc --version', function (error, stdout) {
+              if (!error) {
+                const gcc = stdout.toString().split('\n')[0].trim();
+                if (gcc.indexOf('gcc') > -1 && gcc.indexOf(')') > -1) {
+                  const parts = gcc.split(')');
+                  result.gcc = parts[1].trim() || result.gcc;
+                }
+              }
+              functionProcessed();
+            });
+          }
         });
       } catch (e) {
         if (callback) { callback(result); }