How to get set up to contribute to Chromium's V8 JavaScript engine

setup_to_contribute_to_V8.sh

# Exit the script if any individual command or command group errors out
set -e

cd ~/

if ! [ -e ~/depot_tools ]; then
  git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
  echo
fi

echo "Adding '~/depot_tools' to PATH..."
export PATH=~/depot_tools:"${PATH}"
echo

if ! [ -e ~/depot_tools/metrics.cfg ]; then
  echo "Running 'gclient' to finish setting up depot_tools..."
  gclient
  echo
fi

while ! [ -e ~/.gitcookies ]; do
  echo
  echo "For push access to V8, you need to setup a .gitcookies file"
  echo "with your authentication to Google's code repo and review infrastructure:"
  echo
  echo "1. Go to https://chromium.googlesource.com/new-password and log in with your"
  echo "   committer account (usually an @chromium.org account)."
  echo "   Note: creating a new password/cookie doesn’t automatically revoke"
  echo "   any previously-created passwords/cookies. Please make sure you use"
  echo "   the same email as the one set for git config user.email."
  echo
  echo "2. Have a look at the big, grey box containing shell commands."
  echo "   Paste those lines into your shell."
  echo

  read -p "Please follow the instructions above (in another terminal) then press [Enter]/[Return] to continue. Or to cancel, press [Ctrl] + [C]"
  echo
done

if ! [ -e ~/v8/v8 ]; then
  echo "Fetching V8 and its dependencies..."
  mkdir ~/v8
  cd ~/v8
  fetch v8
  echo
fi

echo "Done!"
echo
echo "Remember to add ~/depot_tools to your PATH before building or testing V8."
echo
echo "Review the following links for more information:"
echo
echo "  How to get V8's source, and procedure for uploading patches:"
echo "    https://v8.dev/docs/source-code"
echo
echo "  How to contribute to V8, procedure for testing/uploading patches (again),"
echo "  how to get a review for your submission, and where to get help"
echo "  with contributing to V8:"
echo "    https://v8.dev/docs/contribute"