Clone & make CPython for development on Mac OS X.

pydevosx

#!/bin/bash
#
# Clone & make CPython for development on Mac OS X.
#
# - Clones CPython into your current directory
# - Installs developer tools & development headers if needed, via brew
# - Configures, makes, tests Python
# - Launches Python REPL
#
# The output is verbose by default.
#
# Use the optional -q flag to make all the underlying commands quiet,
# to the extent possible
#
#   ./pydev -q

function clonepy() {
  # *nix
  read -rp "Please enter your GitHub username: " username
  origin="[email protected]:${username}/cpython.git"
  if [[ -d cpython ]]; then
    read -rp "A cpython/ directory already exists here.  Overwrite? [y/n] " overwrite
    case $overwrite in
      [Yy]* ) rm -rf cpython/ && git clone $origin ;;
      [Nn]* ) echo "OK, aborting with exit code 1." >&2 && exit 1 ;;
    esac
  else
    git clone $q $origin
  fi
  if [[ $q == "--quiet" ]]; then
    # User hasn't seen anything else, so let them know they're good so far
    # (CPython can take a minute or two to download)
    echo "Cloned $origin to cpython/"
  fi
  cd cpython/
  [email protected]:python/cpython.git
  git remote add upstream $upstream && echo "Added upstream remote: $upstream"
  git remote -v
}

function makepymac() {
  xcode-select --install
  if [[ ! -x $(which brew) ]]; then
    echo "It looks like you are missing brew, which this script depends on." >&2
    echo "Please install brew yourself first; see https://brew.sh/." >&2
    exit 1
  fi
  brew install openssl xz || brew upgrade openssl xz
  # See https://devguide.python.org/setup/
  # CPPFLAGS="-I$(brew --prefix openssl)/include" LDFLAGS="-L$(brew --prefix openssl)/lib" ./configure --with-pydebug $q
  ./configure --with-pydebug --with-openssl=$(brew --prefix openssl) $q
  ncores=$(python -c 'import multiprocessing as mp; print(mp.cpu_count())')
  make $q -j $ncores
  ./python.exe -m test $q -j $ncores
  echo
  ./python.exe
}

# Main
plat=$(python -c 'import sys; print(sys.platform)')
if [[ $plat != "darwin" ]]; then
  echo "This script requires Mac OS X (Darwin), not $plat." >&2
  echo "Aborting with exit code 1" >&2
  exit 1
fi
q=""
while getopts "q" flag; do
  case "$flag" in
    q ) q="--quiet" ;;
    * ) error "Unexpected option: ${flag}" ;;
  esac
done
clonepy && makepymac