import csv

def extract_unique_src(csv_file, output_file):
    src_set = set()

    with open(csv_file, newline='') as csvfile:
        csv_reader = csv.DictReader(csvfile)
        for row in csv_reader:
            src = row.get('src', '')
            if src:
                src_set.add(src)

    with open(output_file, 'w') as output:
        for src in src_set:
            output.write(f"{src}\n")

if __name__ == "__main__":
    csv_file_path = "openEuler-22.03-LTS-SP2_baseos_bin_2_src.csv"
    output_file_path = "iso-pkglist.txt"

    extract_unique_src(csv_file_path, output_file_path)
    print(f"Unique 'src' values extracted and saved to {output_file_path}")