Marlin Update and Configuration Override

update.sh

#!/bin/zsh

set -e

# This script assumes the following folder structure:
# .
# ├── .current_version
# ├── Configurations 	<- clone of https://github.com/MarlinFirmware/Configurations
# ├── Marlin 			<- clone of https://github.com/MarlinFirmware/Marlin
# ├── Overrides 		<- Configuration.h and Configuration_adv.h with the overriding values (all lines without any indentation)
# └── update.sh 		<- this script

# This script checks if the latest Marlin version is newer than the current version stored in the file .current_version.
# If there is a newer Marlin version available, the script pulls both the Marlin updates and the Configuration updates.
# It then copies the configuration files into the Marlin repository and applies any overrides specified.

# Use "./update.sh -f" to skip the version check and update anyways

config_path="config/examples/AnyCubic/Mega Zero 2.0/Anycubic V1/"

cd "$(dirname "$0")" 

echo "Checking for updates..."
current_version=$(head .current_version)
echo "Current version: $current_version"
cd Marlin 
git fetch --tags
latest_version=$(git tag | tail -1)
echo "Latest version:  $latest_version"

if [[ "$1" != "-f" ]]; then
    # If there are no updates, exit
    autoload is-at-least
    # If the installed version is at least the latest version (cannot be newer so this is an equal check), exit
    is-at-least "$current_version" "$latest_version" && echo "No updates available." && exit 0 || echo "New version available!"
fi

echo
echo "Updating Marlin"
git reset --hard
git clean -fd
git checkout - 
git pull 
git checkout tags/"$latest_version" 
cd ..

echo
echo "Updating Configurations"
cd Configurations 
git reset --hard 
git clean -fd
git checkout -
git pull
git checkout tags/"$latest_version" 
cd ..

cp "Configurations/$config_path/Configuration.h" "Marlin/Marlin/"
cp "Configurations/$config_path/Configuration_adv.h" "Marlin/Marlin/"

# For each line in the override files, replace the line in the real configuration, keeping the identation
cd Overrides 

echo
echo "Writing overrides..."
for filename in Configuration.h Configuration_adv.h
do
    echo "  Configuring ${filename}..."
    while IFS='' read -r line || [ -n "${line}" ]
    do
        if [[ -n "$line" ]]; then
            # "#define PARAMETER"
            echo "    $line"
            
            # Escape the line's contents to prevent regex conflicts
            line_clean=$(echo "$line" | sed 's/\//\\\//g')
            query=$(echo "$line_clean" | cut -d ' ' -f1-2)
            # Remove leading // if present (query should not be commented out; leading // are already escaped)
            query="${query##\\/\\/}"
            
            # For all lines that match the regex "^( *)(\/\/)?($query) .*" (indentation, comment?, query, value)
            # Replace the match                       "(\/\/)?($query) .*" (comment?, query, value)
            # With $line_clean (whatever is in the overrides file)
            #echo "    Query: $query"
            #echo "    Replc: $line_clean"
            sed -i "" -E "/^( *)(\/\/)?($query)( |$).*/s/(\/\/)?($query)( |$).*/$line_clean/g" "../Marlin/Marlin/${filename}"
        fi
    done < "$filename"
done

cd ..
echo "$latest_version" > .current_version