Add bootstrap-Windows.cmd

usage: bootstrap-Windows.cmd [/?]

Bootstrap a macOS instance with:

* Windows SDK - from MSDN
* Chocolatey - package manager
* Git - from Chocolatey
* Python - from Chocolatey
* virtualenv - from pip
* SSH key - from ssh-keygen
* GitHub public key - with SSH key
* conduit - configuration manager

optional arguments:
        /?              show this help message and exit

bootstrap-Ubuntu.sh

@@ -11,7 +11,9 @@ show_help() {
   echo
   echo "Bootstrap a Ubuntu or Linux Mint instance with:"
   echo
-  echo "* Git - from apt-get"
+  echo "* git - from apt"
+  echo "* python - from apt"
+  echo "* python-pip - from apt"
   echo "* virtualenv - from pip"
   echo "* SSH key - from ssh-keygen"
   echo "* GitHub public key - with SSH key"
@@ -21,80 +23,70 @@ show_help() {
   echo
   echo "optional arguments:"
   echo "        -h              show this help message and exit"
-  echo "        -d              dry run, don't actuall install anything"
-  echo "        -n              don't install pip packeges as --user"
+  echo "        -y              assume yes when prompted"
 }
 
-dry=0
-user='--user'
-sudo=''
+yes=0
 
-while getopts 'hd' opt; do
+while getopts 'hdy' opt; do
   case $opt in
-    h)
-      show_help
-      exit 0
-      ;;
-    d)
-      dry=1
-      ;;
-    u)
-      user=''
-      sudo='sudo'
-      ;;
-    *)
-      show_usage
-      exit 1
-      ;;
+    h) show_help; exit 0 ;;
+    y) yes=1 ;;
+    *) show_usage; exit 1 ;;
   esac
 done
 
-if [ $dry -eq 1 ]; then
-  echo "OPERATING IN DRY RUN MODE!"
+missing() {
+  which $1 &> /dev/null && return 1 || return 0
+}
+
+agree() {
+  local check=^[Nn]$
+  [ $yes -eq 1 ] && [[ ! "$2" =~ $check ]] && return 0
+  [[ "$2" =~ $check ]] && local default="[y/N]" || local default="[Y/n]"
+  read -p "$1 $default? " answer
+  case "$answer" in
+    y|Y|yes) return 0 ;;
+    n|N|no) return 1 ;;
+    '') [[ "$2" =~ $check ]] && return 1 || return 0 ;;
+    *) echo "invalid input: $answer" && return `agree "$1"` ;;
+  esac
+}
+
+apt_install() {
+  sudo apt-get install --yes --install-recommends $1 > /dev/null
+}
+
+pip_install() {
+  pip install --user $1 &> /dev/null
+}
+
+export PATH=~/.local/bin:$PATH
+
+agree "Update apt cache" && sudo apt-get update > /dev/null
+agree "Upgrade apt packages" "N" && sudo apt-get upgrade > /dev/null
+
+missing git && agree "Install git" && apt_install git
+
+if missing pip; then
+  agree "Install python-pip" && apt_install python-pip
+  agree "Upgrade pip with pip" && sudo -H pip install --upgrade pip > /dev/null
 fi
 
-if [ "" != "$user" ]; then
-  export PATH=~/.local/bin:$PATH
-fi
+missing virtualenv && agree "Install virtualenv" && pip_install virtualenv
 
-# Install Git
-if [ ! -f /usr/bin/git ]; then
-  if [ $dry -eq 0 ]; then
-    sudo apt-get install git
-  fi
-  echo "Installed: Git"
-else
-  echo "Satisfied: Git"
-fi
-
-# Install virtualenv
-if [ ! -f ~/.local/bin/virtualenv ]; then
-  if [ $dry -eq 0 ]; then
-    $sudo pip install $user virtualenv &> /dev/null
-    echo "Installed: virtualenv"
-  fi
-else
-  echo "Satisfied: virtualenv"
-fi
-
-# Generate SSH key
-if [ ! -f ~/.ssh/id_rsa ]; then
+if [ ! -f ~/.ssh/id_rsa ] && agree "Generate SSH key"; then
   read -rp "SSH email: " email
-  mkdir ~/.ssh
-  if [ $dry -eq 0 ]; then
-    ssh-keygen -t rsa -b 4096 -C "$email" -N "" -f ~/.ssh/id_rsa
-  fi
-  echo "Generated: SSH key"
-else
-  echo "Satisfied: SSH key"
+  [ ! -d ~/.ssh ] && mkdir -p ~/.ssh
+  ssh-keygen -t rsa -b 4096 -C "$email" -N "" -f ~/.ssh/id_rsa
 fi
 
-# GitHub public key
-env=$(mktemp -d)
-virtualenv $env &> /dev/null
-source $env/bin/activate
-pip install githubpy &> /dev/null
-python <(cat << EOF
+if agree "GitHub public key"; then
+  env=$(mktemp -d)
+  virtualenv $env > /dev/null
+  source $env/bin/activate
+  pip install githubpy > /dev/null
+  python <(cat << EOF
 from __future__ import print_function
 from os import environ
 from os.path import join
@@ -131,28 +123,29 @@ if __name__ == '__main__':
     try:
         main()
     except KeyboardInterrupt:
-        exit(1)
+        exit(130)
 
 EOF
 )
-deactivate
-rm -r $env
-
-# Prompt user to setup other SSH key recipients
-echo "----------------------------------------------------------------------"
-cat ~/.ssh/id_rsa.pub
-echo "----------------------------------------------------------------------"
-read -rp "Set other SSH key recipients, press ENTER to continue: "
-
-# Install conduit
-if ! python -c 'import conduit' &> /dev/null; then
-  if [ $dry -eq 0 ]; then
-    $sudo pip install $user git+ssh://git@github.com:kbenzie/conduit.git
-  fi
-  echo "Installed: conduit"
-else
-  echo "Satisfied: conduit"
+  deactivate
+  rm -r $env
 fi
 
-echo "Completed: $0 will now be removed"
-if [ -f $0 ]; then rm $0; fi
+# TODO: Gogs SSH key
+
+# Prompt user to setup other SSH key recipients
+if [ -f ~/.ssh/id_rsa.pub ]; then
+  echo "----------------------------------------------------------------------"
+  cat ~/.ssh/id_rsa.pub
+  echo "----------------------------------------------------------------------"
+  read -rp "Set other SSH key recipients, press ENTER to continue: "
+fi
+
+# Install conduit
+missing conduit && agree "Install conduit" && \
+  pip_install git+ssh://git@github.com/kbenzie/conduit.git
+
+echo "To use install pip packages update your PATH:"
+echo 'export PATH=~/.local/bin:$PATH'
+
+[ -f $0 ] && agree "Remove $0" "N" && rm $0