always use 'venv' as virtualenv folder

Author: mhils

README.rst

@@ -69,9 +69,9 @@ To get started hacking on mitmproxy, please follow the `advanced installation`_
     ./dev.sh  # "powershell .\dev.ps1" on Windows
 
 
-The *dev* script will create a `virtualenv`_ environment in a directory called
-"venv3.5", and install all mandatory and optional dependencies into it. The
-primary mitmproxy components - mitmproxy and pathod - are installed as
+The *dev* script will create a `virtualenv`_ environment in a directory called "venv"
+and install all mandatory and optional dependencies into it. The primary
+mitmproxy components - mitmproxy and pathod - are installed as
 "editable", so any changes to the source in the repository will be reflected
 live in the virtualenv.
 
@@ -82,7 +82,7 @@ you can run them like any other command:
 
 .. code-block:: text
 
-    . venv3.5/bin/activate  # "venv\Scripts\activate" on Windows
+    . venv/bin/activate  # "venv\Scripts\activate" on Windows
     mitmdump --version
 
 Testing

dev.ps1

@@ -1,20 +1,19 @@
 $ErrorActionPreference = "Stop"
-$VENV = ".\venv"
 
 $pyver = python --version
 if($pyver -notmatch "3\.[5-9]") {
     Write-Warning "Unexpected Python version, expected Python 3.5 or above: $pyver"
 }
 
-python -m venv $VENV --copies
-& $VENV\Scripts\activate.ps1
+python -m venv .\venv --copies
+& .\venv\Scripts\activate.ps1
 
 python -m pip install --disable-pip-version-check -U pip
 cmd /c "pip install -r requirements.txt 2>&1"
 
 echo @"
 
-  * Created virtualenv environment in $VENV.
+  * Created virtualenv environment in .\venv.
   * Installed all dependencies into the virtualenv.
   * Activated virtualenv environment.
 

dev.sh

@@ -2,16 +2,14 @@
 set -e
 set -x
 
-PYVERSION=${1:-3.5}
-VENV="venv$PYVERSION"
+echo "Creating dev environment in ./venv..."
 
-echo "Creating dev environment in $VENV using Python $PYVERSION"
-
-python$PYVERSION -m venv "$VENV"
-. "$VENV/bin/activate"
-pip$PYVERSION install -U pip setuptools
-pip$PYVERSION install -r requirements.txt
+python3 -m venv venv
+. venv/bin/activate
+pip3 install -U pip setuptools
+pip3 install -r requirements.txt
 
 echo ""
-echo "* Virtualenv created in $VENV and all dependencies installed."
-echo "* You can now activate the $(python --version) virtualenv with this command: \`. $VENV/bin/activate\`"
+echo "  * Created virtualenv environment in ./venv."
+echo "  * Installed all dependencies into the virtualenv."
+echo "  * You can now activate the $(python3 --version) virtualenv with this command: \`. venv/bin/activate\`"