Remove PowerShell execution policy (#1175)

* remove check powershell policy

* remove policy dependency

* update

README.md

@@ -155,7 +155,7 @@ Windows
 ```bash
   git clone -b v0.8 https://github.com/Microsoft/nni.git
   cd nni
-  powershell .\install.ps1
+  powershell -ExecutionPolicy Bypass -file install.ps1
 ```
 
 For the system requirements of NNI, please refer to [Install NNI](docs/en_US/Installation.md)

docs/en_US/Installation.md

@@ -28,12 +28,6 @@ Currently we support installation on Linux, Mac and Windows(local, remote and pa
 
 ## **Installation on Windows**
 
-When you use PowerShell to run script for the first time, you need **run PowerShell as administrator** with this command:
-
-```powershell
-Set-ExecutionPolicy -ExecutionPolicy Unrestricted
-```
-
   Anaconda or Miniconda is highly recommended.
 
 * __Install NNI through pip__
@@ -47,13 +41,11 @@ Set-ExecutionPolicy -ExecutionPolicy Unrestricted
 * __Install NNI through source code__
 
   Prerequisite: `python >=3.5`, `git`, `PowerShell`.
-  
-  you can install NNI as administrator or current user as follows:
 
   ```bash
   git clone -b v0.8 https://github.com/Microsoft/nni.git
   cd nni
-  powershell .\install.ps1
+  powershell -ExecutionPolicy Bypass -file install.ps1
   ```
 
 ## **System requirements**

docs/en_US/QuickStart.md

@@ -10,11 +10,7 @@ We support Linux MacOS and Windows in current stage, Ubuntu 16.04 or higher, Mac
 ```
 
 #### Windows
-If you are using NNI on Windows, you need run below PowerShell command as administrator at first time.
-```bash
-    Set-ExecutionPolicy -ExecutionPolicy Unrestricted
-```
-Then install nni through pip:
+
 ```bash
     python -m pip install --upgrade nni
 ```

src/nni_manager/training_service/common/util.ts

@@ -102,7 +102,7 @@ export async function execNewFile(filename: string): Promise<void> {
  */
 export function execScript(filePath: string): cp.ChildProcess {
     if (process.platform === 'win32') {
-        return cp.exec(`powershell.exe -file ${filePath}`);
+        return cp.exec(`powershell.exe -ExecutionPolicy Bypass -file ${filePath}`);
     } else {
         return cp.exec(`bash ${filePath}`);
     }

tools/nni_cmd/launcher.py

@@ -346,13 +346,6 @@ def set_experiment(experiment_config, mode, port, config_file_name):
 def launch_experiment(args, experiment_config, mode, config_file_name, experiment_id=None):
     '''follow steps to start rest server and start experiment'''
     nni_config = Config(config_file_name)
-    # check execution policy in powershell
-    if sys.platform == 'win32':
-        execution_policy = check_output(['powershell.exe','Get-ExecutionPolicy']).decode('ascii').strip()
-        if execution_policy == 'Restricted':
-            print_error('PowerShell execution policy error, please run PowerShell as administrator with this command first:\r\n'\
-                + '\'Set-ExecutionPolicy -ExecutionPolicy Unrestricted\'')
-            exit(1)
     # check packages for tuner
     package_name, module_name = None, None
     if experiment_config.get('tuner') and experiment_config['tuner'].get('builtinTunerName'):