bash script to split vcard in multiple chunk

Readme.md

copy vcard_splitter.sh chmod +x vcard_splitter.sh ./vcard_splitter.sh yourFile.vcf insert the number of part you want and tada

vcard_splitter.sh

#!/bin/bash

# Check if a file is provided as an argument
if [ $# -ne 1 ]; then
    echo "Usage: $0 file.vcf"
    exit 1
fi

vcf_file="$1"

# Check if the file exists
if [ ! -f "$vcf_file" ]; then
    echo "Error: File $vcf_file not found."
    exit 1
fi

# Count the number of contacts
total_contacts=$(grep -c "BEGIN:VCARD" "$vcf_file")
echo "Total number of contacts: $total_contacts"

# Ask for the number of parts to split into
read -p "Into how many parts do you want to split the file? " num_parts

# Validate the input number
if ! [[ "$num_parts" =~ ^[0-9]+$ ]] || [ "$num_parts" -le 0 ]; then
    echo "Error: Please enter a valid number greater than zero."
    exit 1
fi

# Calculate the number of contacts per file
contacts_per_file=$((total_contacts / num_parts))
remainder=$((total_contacts % num_parts))

echo "Each file will contain approximately $contacts_per_file contacts (+1 for the first $remainder files)."

# Initialize variables
output_prefix="contacts_part"
file_index=1
current_count=0
current_file="${output_prefix}_${file_index}.vcf"

# Create and clear the first file
echo "Creating $current_file..."
> "$current_file"

# Check if any output file already exists
for i in $(seq 1 "$num_parts"); do
    out_file="${output_prefix}_${i}.vcf"
    if [ -e "$out_file" ]; then
        echo "Error: The file $out_file already exists. Remove or rename it before continuing."
        exit 1
    fi
done

# Read and distribute contacts into separate files
while IFS= read -r line || [[ -n "$line" ]]; do
    clean_line=$(echo "$line" | tr -d '\r')  # Remove hidden carriage return characters

    if [[ "$clean_line" == "BEGIN:VCARD" ]]; then
        # Check if we need to switch to the next file
        if [[ "$current_count" -ge "$contacts_per_file" && "$file_index" -le "$((num_parts - remainder))" ]] || 
           [[ "$current_count" -ge "$((contacts_per_file + 1))" && "$file_index" -gt "$((num_parts - remainder))" ]]; then
            file_index=$((file_index + 1))
            current_file="${output_prefix}_${file_index}.vcf"
            echo "Creating $current_file..."
            > "$current_file"  # Create an empty file
            current_count=0
        fi
    fi

    # Append the line to the current file
    echo "$line" >> "$current_file"

    if [[ "$clean_line" == "END:VCARD" ]]; then
        current_count=$((current_count + 1))
    fi
done < "$vcf_file"

echo "Splitting completed!"