Script to build the ESP32 toolchain on Ubuntu

build-esp32-toolchain

#!/bin/bash

# Adapted from https://raw.githubusercontent.com/lpodkalicki/blog/master/esp32/tools/build_esp32_toolchain.sh
# This gist came from: https://gist.github.com/simos/fdc2633bab0a5b17945c26b611c4fcdc

# Configuration
BASE_DIR=~/esp
TOOLCHAIN_BASE_URL=https://dl.espressif.com/dl/
TOOLCHAIN_FILENAME=xtensa-esp32-elf-linux64-1.22.0-80-g6c4433a-5.2.0.tar.gz

# -------------------------------------------
# 0. Parse arguments
while [[ $# -gt 1 ]]
do
key="$1"
case $key in
    -d|--directory)
    BASE_DIR="$2"
    shift
    ;;
    *)
    # unknown option
    ;;
esac
shift # past argument or value
done


# -------------------------------------------
# 1. Prepare base directory
if [ -d "$BASE_DIR" ]; then
	echo "Base directory already exists: $BASE_DIR, exiting..."
	exit 1
fi
mkdir -p $BASE_DIR
cd $BASE_DIR


# -------------------------------------------
# 2. Collect and install tools
echo "Installing required packages"
sudo apt-get update
sudo apt-get install -y git wget make libncursesw5-dev flex bison gperf python python-serial python-pip
echo

# -------------------------------------------
# 3. Download and unpack binary toolchain for ESP32
TOOLCHAIN_URL="$TOOLCHAIN_BASE_URL/$TOOLCHAIN_FILENAME"
echo "Downloading toolchain"
wget $TOOLCHAIN_URL
tar -xzf $TOOLCHAIN_FILENAME
TOOLCHAIN_DIR="$BASE_DIR/xtensa-esp32-elf/bin"
export PATH=$PATH:$TOOLCHAIN_DIR
echo "export PATH=\$PATH:$TOOLCHAIN_DIR" >> ~/.bashrc
echo


# -------------------------------------------
# 4. Get ESP-IDF from GitHub
echo "Downloading ESP-IDF from Github"
git clone --recursive https://github.com/espressif/esp-idf.git
IDF_DIR="$BASE_DIR/esp-idf"
export IDF_PATH=$IDF_DIR
echo "export IDF_PATH=$IDF_DIR" >> ~/.bashrc
echo

# -------------------------------------------
# 5. Install required Python packages for ESP-IDF
echo "Installing required Python package for ESP-IDF"
/usr/bin/python -m pip install --user -r /home/ubuntu/esp/esp-idf/requirements.txt

echo "-------------------------------------------"
echo "Base directory: $BASE_DIR"
echo "ESP-Toolchain directory: $TOOLCHAIN_DIR"
echo "ESP-IDF directory: $IDF_DIR"
echo "SUCCESS!"