diffoscope 144 source package in Ubuntu

Changelog

diffoscope (144) unstable; urgency=medium

  [ Chris Lamb ]

  * Improvements:

    - Print the amount of free space that we have available in our temporary
      directory as a debugging message.
    - Remove (broken) fuzzy matching of JSON files as file 5.35 (in buster,
      released 2018-10-18) supports recognising JSON data.
      (Closes: reproducible-builds/diffoscope#106)
    - Don't pretty-print the JSON output by default as it will usually be so
      complicated to be unreadable by the human eye and it can be easily
      replaced by piping to "| jq".
    - Don't print a traceback if we pass a single, missing argument to
      diffoscope (eg. a JSON diff to re-load).

  * Reporting/output improvements:

    - Reduce the default number of maximum standard error lines printed from 50
      to 25; usually the error is obvious by that point.
    - Clarify the message when we truncate the number of lines to standard error.
    - Clarify when an external command emits for both files, otherwise it can
      look like diffoscope is repeating itself when it is actually being run
      twice.
    - Don't repeat "stderr from {}" if both commands emit the same thing.

  * Dockerfile improvements:

    - Use ARG instead of ENV for DEBIAN_FRONTEND so we do not set this
      environment variable at runtime.
      (Closes: reproducible-builds/diffoscope#103)
    - Run diffoscope as a non-root user in the runtime container.
      (Closes: reproducible-builds/diffoscope#102)
    - Add a .dockerignore file to whitelist files we need in our container.
      Thanks to Emanuel Bronshtein for the original idea.
      (Closes: reproducible-builds/diffoscope#105)
    - Install/remove the build-essential package during build so we can install
      the recommended packages from Git.

  * Testsuite improvements:

    - Include the Black output in the assertion failure too.
    - Update the Black self-test; we don't care about the length of the black
      output, rather whether it has some or, preferably, not.

  * Codebase improvements:

    - Bump the officially required version of Python from 3.5 to 3.6.
      (Closes: reproducible-builds/diffoscope#117)
    - Drop an unused shlex import.
    - Instruct linters to pass over a bare try-except when cleaning up
      temporary files used to extract archives.
    - Format diffoscope/comparators/utils/command.py according to Black 19.10b0-3.
    - Drop entries from Uploaders that have not uploaded in over three years
      with esteemed thanks for their previous work.
    - Drop .travis.yml; we are using Salsa now and likely would not give
      support for running on Travis CI at this point.

  [ Jelle van der Waa ]
  * Update LLVM diff for LLVM version 10.

  [ Vagrant Cascadian ]
  * Add external tool reference on openssl for GNU Guix.

 -- Chris Lamb <email address hidden>  Thu, 14 May 2020 16:16:06 +0100