add config : python.sortImports.path (#632)

* add config :  python.sortImports.path

* ensure isort length is > 0

Author: viewstar000

package.json

@@ -794,6 +794,11 @@
 					"default": "",
 					"description": "Path to directory containing the Jedi library (this path will contain the 'Jedi' sub directory)."
 				},
+        "python.sortImports.path": {
+          "type": "string",
+          "description": "Path to isort script, default using inner version",
+          "default": ""
+        },
 				"python.sortImports.args": {
 					"type": "array",
 					"description": "Arguments passed in. Each argument is a separate item in the array.",
@@ -1261,4 +1266,4 @@
 		"vscode": "^1.0.0",
 		"webpack": "^1.13.2"
 	}
-}
+}

src/client/common/configSettings.ts

@@ -23,6 +23,7 @@ export interface IPythonSettings {
 }
 
 export interface ISortImportSettings {
+    path: string;
     args: string[];
 }
 
@@ -156,7 +157,7 @@ export class PythonSettings extends EventEmitter implements IPythonSettings {
             this.sortImports = sortImportSettings;
         }
         // Support for travis
-        this.sortImports = this.sortImports ? this.sortImports : { args: [] };
+        this.sortImports = this.sortImports ? this.sortImports : { path: '', args: [] };
         // Support for travis
         this.linting = this.linting ? this.linting : {
             enabled: false,

src/client/providers/importSortProvider.ts

@@ -22,8 +22,15 @@ export class PythonImportSortProvider {
             let filePromise = tmpFileCreated ? getTempFileWithDocumentContents(document) : Promise.resolve(document.fileName);
             filePromise.then(filePath => {
                 const pythonPath = settings.PythonSettings.getInstance().pythonPath;
+                const isort = settings.PythonSettings.getInstance().sortImports.path;
                 const args = settings.PythonSettings.getInstance().sortImports.args.join(' ');
-                child_process.exec(`${pythonPath} "${importScript}" "${filePath}" --diff ${args}`, (error, stdout, stderr) => {
+                let isort_cmd = '';
+                if (typeof isort === 'string' && isort.length > 0) {
+                    isort_cmd = `${isort} "${filePath}" --diff ${args}`;
+                } else {
+                    isort_cmd = `${pythonPath} "${importScript}" "${filePath}" --diff ${args}`;
+                }    
+                child_process.exec(isort_cmd, (error, stdout, stderr) => {
                     if (tmpFileCreated) {
                         fs.unlink(filePath);
                     }