Create venv and install as app (for apps like labelme and gscreenshot)

mkvenvapp.sh

#!/bin/sh

# Install venv first.

apppkg="$1"
appcmd="$2"

if [ -z "$apppkg" ]; then
  echo "./mvenvapp.sh <apppkg> [appcmd]"
  exit 1
fi

if [ -z "$appcmd" ]; then
  appcmd="$apppkg"
fi

envname="$appcmd"
python3 -m venv "$envname"
activate=$(realpath "$envname/bin/activate")
proxyfile="$HOME/.local/bin/$appcmd"
echo $envname
. $activate
pip install "$apppkg"

echo "
. $activate
$appcmd \$@
" > "$proxyfile"
chmod 755 "$proxyfile"