Sharing some of my newest small Bash scripts using 7z

[thingsiplay@beehaw.org]

New version for toarchive: https://gist.github.com/thingsiplay/889cb2899f35405e10839112f5181ab3#file-toarchive

(I have added a new version of the script. The old one is renamed to 'toarchive-old'. The new script has some guard rails and more checks. Also original files can be removed automatically on success, like gzip does. But an option -r must be explicitly given here, like toarchive zip -r file.txt. Directories can be removed too, but the option uppercase -R is required here, as in toarchive zip -R my_dir. Have in mind this will use rm -r system command. Although some guard rails are in place to prevent massive fail, you should be very careful. Note that no file is removed, if -r or -R are not used at all.)

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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:

(Update April 17, 2025: Note this is a new version that addresses some issues. The old version I had posted was broken.)

#!/usr/bin/env bash

# Calculate CRC32 for each file.
if [ "${#}" -eq 0 ]; then
    echo "crc32sum files..."
    echo "crc32sum *.smc"
else
    7z h -bsp2 -- "${@}" |
        \grep -v -E '^[ \t]+.*/' |
        \sed -n -e '/^-------- -------------  ------------$/,$p' |
        \sed '1d' |
        \grep --before-context "9999999" '^-------- -------------  ------------$' |
        \head -n -1 |
        awk '$2=""; {print $0}'
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