adding version func

Almenon · Almenon · commit 0a248243e4aa · 2018-10-03T09:25:04.000-04:00
diff --git a/index.ts b/index.ts
@@ -1,9 +1,10 @@
 import {EventEmitter} from 'events';
-import { ChildProcess,spawn, SpawnOptions, exec } from 'child_process';
+import { ChildProcess,spawn, SpawnOptions, exec, execSync } from 'child_process';
 import {EOL as newline, tmpdir} from 'os';
 import {join, sep} from 'path'
 import {Readable,Writable} from 'stream'
 import { writeFile, writeFileSync } from 'fs';
+import { promisify } from 'util';
 
 function toArray<T>(source?:T|T[]):T[] {
     if (typeof source === 'undefined' || source === null) {
@@ -283,6 +284,16 @@ export class PythonShell extends EventEmitter{
         return PythonShell.run(filePath, options, callback);
     };
 
+    static getVersion(pythonPath?:string){
+        if(!pythonPath) pythonPath == this.defaultPythonPath
+        let execPromise = promisify(exec)
+        return execPromise(pythonPath + " --version")
+    }
+
+    static getVersionSync(pythonPath?:string){
+        return execSync(pythonPath + " --version").toString()
+    }
+
     /**
      * Parses an error thrown from the Python process through stderr
      * @param  {string|Buffer} data The stderr contents to parse
diff --git a/test/test-python-shell.ts b/test/test-python-shell.ts
@@ -78,6 +78,25 @@ describe('PythonShell', function () {
         })
     })
 
+    describe("#getVersion", function(){
+        it('should return a string', function(done){
+            PythonShell.getVersion().then(version => {
+                console.log(version)
+                version.stdout.should.be.a.String();
+                version.stdout.length.should.be.greaterThan(0)
+                done()
+            })
+        })
+    })
+
+    describe("#getVersionSync", function(){
+        it('should return a string', function(){
+            const version = PythonShell.getVersionSync()
+            version.should.be.a.String();
+            version.length.should.be.greaterThan(0)
+        })
+    })
+
     describe('#runString(script, options)', function () {
         before(()=>{
             PythonShell.defaultOptions = {};
