ESP binary merger script for production releases

merge.sh

chip=esp32
outfolder=production

mkdir -p $outfolder
rm -rf $outfolder/*

# get application bin name
application_bin_name=$(grep "project(" CMakeLists.txt | cut -d "(" -f2 | cut -d ")" -f1)
echo "application bin name: $application_bin_name"

# build application
idf.py build 

#err
if [ $? -ne 0 ]; then
    echo "build failed again, exiting..."
    exit 1
fi

#generate merged binary
FLASHER_ARGS_FILE="build/flasher_args.json"
# Check if jq is installed
if ! command -v jq &> /dev/null
then
    echo "jq could not be found. Please install it (e.g., sudo apt install jq)"
    exit 1
fi

# 
# Prepare flash file list dynamically from the "flash_files" section
FLASH_FILES=$(jq -r '.flash_files | to_entries[] | "\(.key) \(.value)"' $FLASHER_ARGS_FILE)
echo "Flash files: $FLASH_FILES"

# Construct the esptool.py merge_bin command dynamically
MERGE_CMD="esptool.py --chip $chip merge_bin -o ${outfolder}/$application_bin_name.merged.bin"

# Add each offset and corresponding file to the merge_bin command
while IFS= read -r entry; do
    OFFSET=$(echo $entry | awk '{print $1}')
    FILE=$(echo $entry | awk '{print $2}')
    MERGE_CMD+=" $OFFSET build/$FILE"
done <<< "$FLASH_FILES"

# Display the full command
echo "Running command: $MERGE_CMD"

# Execute the command
eval $MERGE_CMD

if [ $? -ne 0 ]; then
    echo "merge failed"
    exit 1
fi


#copy production
cp ./build/$application_bin_name.bin ${outfolder}/$application_bin_name.bin
cp ./build/ota_data_initial.bin ${outfolder}/ota_data_initial.bin
cp ./build/partition_table/partition-table.bin ${outfolder}/partition_table.bin
cp ./build/bootloader/bootloader.bin ${outfolder}/bootloader.bin