Home brew install for M1 and Intel

Two questions:

1) Where is it getting stuck?

2) How do you have "/usr/local/bin/jamf policy -event brew" set up?

Did you ever figure this out?  This is the script I'm currently using and it works great.

#!/bin/bash

# Script to install Homebrew on a Mac.
# Author: richard at richard - purves dot com
# Version: 1.0 - 21st May 2017

# Heavily hacked by Tony Williams (honestpuck@gmail.com)
# Latest version at https://github.com/Honestpuck/homebrew.sh
# v2.0 - 19th Sept 2019
# v2.0.1 Fixed global cache error
# v2.0.2 Fixed brew location error
# v2.0.3 Added more directories to handle

# v3.0 Catalina version 2020-02-17
# v3.1 | 2020-03-24 | Fix permissions for /private/tmp
# v3.2 2020-07-18 Added Caskroom to directories created and added check for binary
# update if it exists then exit

# Set up variables and functions here
consoleuser="$(/usr/bin/python -c 'from SystemConfiguration import SCDynamicStoreCopyConsoleUser; import sys; username = (SCDynamicStoreCopyConsoleUser(None, None, None) or [None])[0]; username = [username,""][username in [u"loginwindow", None, u""]]; sys.stdout.write(username + "
");')"

if [[ -e /usr/local/bin/brew ]]; then
su -l "$consoleuser" -c "/usr/local/bin/brew update"
exit 0
fi

# are we in the right group
check_grp=$(groups ${consoleuser} | grep -c '_developer')
if [[ $check_grp != 1 ]]; then
/usr/sbin/dseditgroup -o edit -a "${consoleuser}" -t user _developer
fi

# Logging stuff starts here
LOGFOLDER="/private/var/log/"
LOG="${LOGFOLDER}Homebrew.log"

if [ ! -d "$LOGFOLDER" ]; then
mkdir $LOGFOLDER
fi

function logme()
{
# Check to see if function has been called correctly
if [ -z "$1" ] ; then
echo "$(date) - logme function call error: no text passed to function! Please recheck code!"
echo "$(date) - logme function call error: no text passed to function! Please recheck code!" >> $LOG
exit 1
fi

# Log the passed details
echo -e "$(date) - $1" >> $LOG
echo -e "$(date) - $1"
}

# Check and start logging
logme "Homebrew Installation"

# Have the xcode command line tools been installed?
logme "Checking for Xcode Command Line Tools installation"
check=$( pkgutil --pkgs | grep -c "CLTools_Executables" )

if [[ "$check" != 1 ]]; then
logme "Installing Xcode Command Tools"
# This temporary file prompts the 'softwareupdate' utility to list the Command Line Tools
touch /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress
clt=$(softwareupdate -l | grep -B 1 -E "Command Line (Developer|Tools)" | awk -F"*" '/^ +\\*/ {print $2}' | sed 's/^ *//' | tail -n1)
# the above don't work in Catalina so ...
if [[ -z $clt ]]; then
clt=$(softwareupdate -l | grep "Label: Command" | tail -1 | sed 's#* Label: (.*)#1#')
fi
softwareupdate -i "$clt"
rm -f /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress
/usr/bin/xcode-select --switch /Library/Developer/CommandLineTools
fi

# Is homebrew already installed?
if [[ ! -e /usr/local/bin/brew ]]; then
# Install Homebrew. This doesn't like being run as root so we must do this manually.
logme "Installing Homebrew"

mkdir -p /usr/local/Homebrew
# Curl down the latest tarball and install to /usr/local
curl -L https://github.com/Homebrew/brew/tarball/master | tar xz --strip 1 -C /usr/local/Homebrew

# Manually make all the appropriate directories and set permissions
mkdir -p /usr/local/Cellar /usr/local/Homebrew mkdir /usr/local/Caskroom /usr/local/Frameworks /usr/local/bin
mkdir -p /usr/local/include /usr/local/lib /usr/local/opt /usr/local/etc /usr/local/sbin
mkdir -p /usr/local/share/zsh/site-functions /usr/local/var
mkdir -p /usr/local/share/doc /usr/local/man/man1 /usr/local/share/man/man1
chown -R "${consoleuser}":_developer /usr/local/*
chmod -R g+rwx /usr/local/*
chmod 755 /usr/local/share/zsh /usr/local/share/zsh/site-functions

# Create a system wide cache folder
mkdir -p /Library/Caches/Homebrew
chmod g+rwx /Library/Caches/Homebrew
chown "${consoleuser}:_developer" /Library/Caches/Homebrew

# put brew where we can find it
ln -s /usr/local/Homebrew/bin/brew /usr/local/bin/brew

# Install the MD5 checker or the recipes will fail
su -l "$consoleuser" -c "/usr/local/bin/brew install md5sha1sum"
echo 'export PATH="/usr/local/opt/openssl/bin:$PATH"' |
tee -a /Users/${consoleuser}/.bash_profile /Users/${consoleuser}/.zshrc
chown ${consoleuser} /Users/${consoleuser}/.bash_profile /Users/${consoleuser}/.zshrc

# clean some directory stuff for Catalina
chown -R root:wheel /private/tmp
chmod 777 /private/tmp
chmod +t /private/tmp
fi

# Make sure everything is up to date
logme "Updating Homebrew"
su -l "$consoleuser" -c "/usr/local/bin/brew update" 2>&1 | tee -a ${LOG}

# logme user that all is completed
logme "Installation complete"

exit 0