hashsum

Python drop-in replacement for md5sum, and co.

Usage

usage: hashsum [-h] [-a] [--tag] [-b | -t] [-c | -l] [--quiet]
               [--status] [--strict] [-w] [-m] [--version]
               [FILE [FILE ...]]

Compute and check message digest with different hash algorithms.
The sums are computed as described in [1].
When checking, the input should be a former output of this program.
The default mode is to print a line with checksum, a character
indicating input mode ('*' for binary, space for text), and name
for each FILE.

[1] https://docs.python.org/3/library/hashlib.html

positional arguments:
  FILE                  name of file to process. If not specified,
                        or set to -, data are read form the
                        standard input

optional arguments:
  -h, --help            show this help message and exit
  -a , --algorithm      specify the hashing algorithm
                        (default: 'md5')
  --tag                 create a BSD-style checksum
  -b, --binary          read input data in binary mode
  -t, --text            read input data in text mode (default)
  -c, --check           read checksum(s) form FILE and check them
  -l, --list-algorithms
                        list available hashing algorithms
  -m, --multi-thread    perform I/O and hash computation in separate threads
                        (default=False). Can speed-up computation on large
                        files while it is not recommended for small files.
  --version             show program's version number and exit

check:
  Options that are useful only when verifying checksums

  --quiet               don't print OK for each successfully
                        verified file
  --status              don't output anything, status code shows
                        success
  --strict              exit non-zero for improperly formatted
                        checksum lines
  -w, --warn            warn about improperly formatted checksum
                        lines

Package testing

The recommended way to test the package is to use pytest:

$ python3 -m pytest -v

========================== test session starts ==========================
platform linux -- Python 3.9.5, pytest-6.0.2, py-1.10.0, pluggy-0.13.0
hashsum version:      1.4.0.dev0
Platform:             Linux-5.11.0-24-generic-x86_64-with-glibc2.33
Byte-ordering:        little
Default encoding:     utf-8
Default FS encoding:  utf-8
Default locale:       ('it_IT', 'UTF-8')
rootdir: /home/antonio/projects/hashsum, configfile: setup.cfg
plugins: hypothesis-5.43.3, remotedata-0.3.2, doctestplus-0.9.0,
        openfiles-0.5.0, flake8-1.0.6, filter-subpackage-0.1.1, cov-2.10.1
collected 26 items

tests/test_hashsum.py::ComputeSumTestCase::test_binary PASSED       [  3%]
tests/test_hashsum.py::ComputeSumTestCase::test_binary_auto PASSED  [  7%]

[...]

tests/test_hashsum.py::ThreadedCheckTestCase::test_text PASSED      [100%]

========================== 26 passed in 0.29s ===========================

Please note that some basic system information that can be sued for bug reporting are also printed on the screen.

The default configuration for "pytest" is stored into the setup.cfg file in the root directory of the source package:

[tool:pytest]
addopts = -p no:warnings -p no:logging

Alternatively it is possible to use:

$ python3 -m unittest -v tests/test_hashsum.py

License

The hashsum software is distribute under the terms of the "3-Clause BSD License" see LICENSE.txt file for details.