install_gcc_arm.sh

#!/usr/bin/env bash

# Ensure compiler isn't already installed
[[ -d /usr/local/gcc_arm/ ]] && echo 'gcc_arm already installed. Aborting...' && exit 1

echo '---> Downloading gcc arm to your current directory'
[[ ! -f gcc-arm-none-eabi-4_8-2014q2-20140609-mac.tar.bz2 ]] && \
  curl https://s3.amazonaws.com/ericboehs-uploads/gcc-arm-none-eabi-4_8-2014q2-20140609-mac.tar.bz2 > gcc-arm-none-eabi-4_8-2014q2-20140609-mac.tar.bz2
# Rehosted on Amazon S3 as launchpad is really slow.
# If you are uncomfortable downloading from an unknown source, replace the above with:
# curl -L https://launchpad.net/gcc-arm-embedded/4.8/4.8-2014-q2-update/+download/gcc-arm-none-eabi-4_8-2014q2-20140609-mac.tar.bz2 > gcc-arm-none-eabi-4_8-2014q2-20140609-mac.tar.bz2
# Note the md5 from launchpad is here: https://launchpad.net/gcc-arm-embedded/4.8/4.8-2014-q2-update/+download/gcc-arm-none-eabi-4_8-2014q2-20140609-mac.tar.bz2/+md5
# And this script aborts if it doesn't match

# Verify downloaded file matches MD5 checksum
[[ "$(md5 -q gcc-arm-*.tar.bz2)" != "4a05e26d9eb30f43752667a34001e755" ]] && echo 'MD5 mismatch! Aborting...' && exit 1

# Check if extraction directory already exists
[[ -d gcc-arm-none-eabi-4_8-2014q2-20140609-mac ]] && echo 'gcc-arm-none-eabi-4_8-2014q2-20140609-mac already exists; Aborting...' && exit 1

echo '---> Extracting gcc arm file. This will take 10+ seconds even on a fast machine'
tar -xzf gcc-arm-*.tar.bz2

# Clean up bzip2 tar file
rm gcc-arm-*.tar.bz2

# Create directory for gcc arm to live
mkdir -p /usr/local/gcc_arm

# Move extracted files into place
mv gcc-arm-*/* /usr/local/gcc_arm

# Clean up empty gcc arm directory from working dir
rmdir gcc-arm-*/

# Prepend gcc arm bin dir to your PATH
grep -Fxq '/usr/local/gcc_arm/bin' /etc/paths && \
  echo '--->   Already in /etc/paths. Skipping...' || \
  sudo sed -iold '1i\'$'\n''/usr/local/gcc_arm/bin\'$'\n' /etc/paths
  
# Prepend your path for this session
export PATH="/usr/local/gcc/arm/bin:$PATH"

# Ensure binary is setup right by showwing the gcc-arm compiler version
echo '---> Check to ensure the gcc-arm firmware compiler is available (so `make clean dependents all` will work.)'
echo '     You should see something like:'
echo '         arm-none-eabi-gcc (GNU Tools for ARM Embedded Processors) 4.8.4 20140526 (release) [ARM/embedded-4_8-branch revision 211358]'
echo "     Running 'arm-none-eabi-gcc --version | head -1' now:"
echo
arm-none-eabi-gcc --version | head -1
echo

This shouldn't be too hard to create a homebrew formula for this.

#TODO