Linux

I always write little scripts and aliases that help me from time to time. I just wanted to share some of my newest simple scripts. There are probably better or easier ways to do, but writing and testing them is fun too. Both make use of the 7z command, a commandline archive tool. Posting it here, so anyone can steal them. They are freshly written, so maybe there are edge cases.

crc32sum:

#!/usr/bin/env bash

# Calculate CRC32 for each file.
if [ "${#}" -eq 0 ]; then
    echo "crc32sum files..."
    echo "crc32sum *.smc"
else
    7z h -- "${@}" |
        \grep --after-context "${#}" '^-------- -------------  ------------$' |
        \grep --before-context "${#}" '^-------- -------------  ------------$' |
        awk '{print $1 "\t" $3}' |
        \grep -P '^[0-9A-Z]+\t'
fi

toarchive:

#!/usr/bin/env bash

# Create one archive for each file or folder.
if [ "${#}" -eq -1 ]; then
    echo "toarchive ext files..."
    echo "toarchive zip *.smc"
else
    ext="${1}"
    shift
    opt=()
    stop_parse=false

    for arg in "${@}"; do
        if [ ! "${stop_parse}" == true ]; then
            if [ "${arg}" == "--" ]; then
                stop_parse=true
                opt+=(--)
                continue
            elif [[ "${arg}" =~ ^- ]]; then
                opt+=("${arg}")
                continue
            fi
        fi
        file="${arg}"

        7z a "${opt[@]}" "${file}.${ext}" "${file}"
    done
fi