This README is the one indexed from the repository at its latest ref, not from the tag for this version.

verisum

verisum makes the output of md5sum -c or sha256sum -c prettier.

Verifying MD5 of 100,000 images from "たっぷり素材PIXTA"

Installation

You can download pre-compiled binaries from GitHub Release.

To compile from source code, follow the steps below:

git clone https://github.com/kojix2/verisum
cd verisum
shards build --release
sudo cp bin/verisum /usr/local/bin/

Homebrew:

brew install kojix2/brew/verisum

Usage

  Options;
    -c, --calc                       Compute checksums
    -a, --algorithm ALGORITHM        (md5|sha1|sha256|sha512)
    -A, --absolute                   Output absolute path [false]
    -v, --verbose                    Output checksums and errors, etc [false]
    -C, --chdir DIR                  Change working directory before processing
    --color WHEN                     when to use color (auto|always|never) [auto]
    -D, --debug                      Print a backtrace on error
    -h, --help                       Show this message
    -V, --version                    Show version

Verification

To verify the checksums with:

verisum md5.txt

Example output:

4 files in md5.txt
4 files, 4 success, 0 mismatch, 0 errors  (0.0 seconds)

Calculation

We recommend using standard Unix commands for calculations, but if standard Unix commands are not available, you can also use this tool for calculations.

Note that the effect of the -c option is the opposite of md5sum.

verisum -c -a md5 * | tee md5.txt

Sort the file list before calculating the checksums:

find . -type f | sort | xargs verisum -c -a md5 | tee md5.txt

Example output:

62525c1aa35e61fb4e60c053e1faa849  LICENSE
3be217b6d3ac7c38e1805b01b1be0178  README.md
cb9c37b1954a07579e044e33521c993d  shard.lock
c680044745baa4b423450c9ecb8baebb  shard.yml

Development

Pull requests are welcome.

License

MIT