Create a new react native app, specifying app name and package name

create-new-react-native-project.sh

#!/usr/bin/env bash

# get the full path for the current dir
DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )

###### prompt for values

# get the new app name
read -p "Enter your new app name [Foo App]: " NEW_APP_NAME
NEW_APP_NAME=${NEW_APP_NAME:-"Foo App"}
echo     ...using ${NEW_APP_NAME} as new app name

# get the new folder name
NEW_FOLDER_NAME=$(echo -n "$NEW_APP_NAME" | sed 's/^ *//' | sed 's/ *$//' | tr -dc '[:alnum:]\n\r' | tr '[:upper:]' '[:lower:]')  # Trim special chars, leading and trailing whitespace.
echo     ...using ${NEW_FOLDER_NAME} as new folder name

# get the new package name
read -p "Enter your new package name [org.newpackage.app]: " NEW_PACKAGE_NAME
NEW_PACKAGE_NAME=${NEW_PACKAGE_NAME:-"org.newpackage.app"}
echo     ...using ${NEW_PACKAGE_NAME} as new package name

OLD_PACKAGE_NAME=org.reactjs.native.example

######### test for prerequisites

command -v npx >/dev/null 2>&1 || {
  echo -e "I require npx but it's not installed.\n\nAborting.\n" >&2;
  exit 1;
}

command -v pod >/dev/null 2>&1 || {
  echo -e "I require cocoapods but it's not installed.\n\nAborting.\n" >&2;
  exit 1;
}

######### run commands

npx react-native init "${NEW_FOLDER_NAME}" && \
  cd "${NEW_FOLDER_NAME}" && \
  npx react-native-rename "${NEW_APP_NAME}" -b ${NEW_PACKAGE_NAME} && \
  rm -rf ios/Pods && \
  pod install --project-directory=./iOS && \
  grep -rl ${OLD_PACKAGE_NAME} * | \
    xargs sed -i '.bak' "s/${OLD_PACKAGE_NAME}/${NEW_PACKAGE_NAME}/g"

#########