feat(cli): change virtualenv directory to .venv to comply with python…

… recommendation (#10995)

Replace virtualenv directory `.env` to `.venv` for the python templates

Closes #9134

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/aws-cdk/README.md

@@ -45,9 +45,11 @@ $ # List the available template types & languages
 $ cdk init --list
 Available templates:
 * app: Template for a CDK Application
-   └─ cdk init app --language=[java|typescript]
+   └─ cdk init app --language=[csharp|fsharp|java|javascript|python|typescript]
 * lib: Template for a CDK Construct Library
    └─ cdk init lib --language=typescript
+* sample-app: Example CDK Application with some constructs
+   └─ cdk init sample-app --language=[csharp|fsharp|java|javascript|python|typescript]
 
 $ # Create a new library application in typescript
 $ cdk init lib --language=typescript

packages/aws-cdk/lib/init-templates/app/python/README.template.md

@@ -15,20 +15,20 @@ you can create the virtualenv manually.
 To manually create a virtualenv on MacOS and Linux:
 
 ```
-$ %python-executable% -m venv .env
+$ %python-executable% -m venv .venv
 ```
 
 After the init process completes and the virtualenv is created, you can use the following
 step to activate your virtualenv.
 
 ```
-$ source .env/bin/activate
+$ source .venv/bin/activate
 ```
 
 If you are a Windows platform, you would activate the virtualenv like this:
 
 ```
-% .env\Scripts\activate.bat
+% .venv\Scripts\activate.bat
 ```
 
 Once the virtualenv is activated, you can install the required dependencies.

packages/aws-cdk/lib/init-templates/app/python/source.bat

@@ -2,12 +2,12 @@
 
 rem The sole purpose of this script is to make the command
 rem
-rem     source .env/bin/activate
+rem     source .venv/bin/activate
 rem
 rem (which activates a Python virtualenv on Linux or Mac OS X) work on Windows.
 rem On Windows, this command just runs this batch file (the argument is ignored).
 rem
 rem Now we don't need to document a Windows command for activating a virtualenv.
 
-echo Executing .env\Scripts\activate.bat for you
-.env\Scripts\activate.bat
+echo Executing .venv\Scripts\activate.bat for you
+.venv\Scripts\activate.bat

packages/aws-cdk/lib/init-templates/sample-app/python/README.template.md

@@ -7,28 +7,28 @@ which contains an Amazon SQS queue that is subscribed to an Amazon SNS topic.
 The `cdk.json` file tells the CDK Toolkit how to execute your app.
 
 This project is set up like a standard Python project.  The initialization process also creates
-a virtualenv within this project, stored under the .env directory.  To create the virtualenv
+a virtualenv within this project, stored under the .venv directory.  To create the virtualenv
 it assumes that there is a `python3` executable in your path with access to the `venv` package.
 If for any reason the automatic creation of the virtualenv fails, you can create the virtualenv
 manually once the init process completes.
 
 To manually create a virtualenv on MacOS and Linux:
 
 ```
-$ %python-executable% -m venv .env
+$ %python-executable% -m venv .venv
 ```
 
 After the init process completes and the virtualenv is created, you can use the following
 step to activate your virtualenv.
 
 ```
-$ source .env/bin/activate
+$ source .venv/bin/activate
 ```
 
 If you are a Windows platform, you would activate the virtualenv like this:
 
 ```
-% .env\Scripts\activate.bat
+% .venv\Scripts\activate.bat
 ```
 
 Once the virtualenv is activated, you can install the required dependencies.

packages/aws-cdk/lib/init-templates/sample-app/python/source.bat

@@ -2,12 +2,12 @@
 
 rem The sole purpose of this script is to make the command
 rem
-rem     source .env/bin/activate
+rem     source .venv/bin/activate
 rem
 rem (which activates a Python virtualenv on Linux or Mac OS X) work on Windows.
 rem On Windows, this command just runs this batch file (the argument is ignored).
 rem
 rem Now we don't need to document a Windows command for activating a virtualenv.
 
-echo Executing .env\Scripts\activate.bat for you
-.env\Scripts\activate.bat
+echo Executing .venv\Scripts\activate.bat for you
+.venv\Scripts\activate.bat

packages/aws-cdk/lib/init.ts

@@ -323,13 +323,13 @@ async function postInstallJava(canUseNetwork: boolean, cwd: string) {
 
 async function postInstallPython(cwd: string) {
   const python = pythonExecutable();
-  warning(`Please run '${python} -m venv .env'!`);
+  warning(`Please run '${python} -m venv .venv'!`);
   print(`Executing ${colors.green('Creating virtualenv...')}`);
   try {
-    await execute(python, ['-m venv', '.env'], { cwd });
+    await execute(python, ['-m venv', '.venv'], { cwd });
   } catch (e) {
     warning('Unable to create virtualenv automatically');
-    warning(`Please run '${python} -m venv .env'!`);
+    warning(`Please run '${python} -m venv .venv'!`);
   }
 }
 

packages/aws-cdk/test/integ/init/test-python.sh

@@ -23,7 +23,7 @@ for template in $templates; do
 
     cdk init -l python $template
 
-    source .env/bin/activate
+    source .venv/bin/activate
     type -p pip
     pip install -r requirements.txt