---
layout: post
title: diffoscope 57 released
author: Chris Lamb <lamby@debian.org>
---

The diffoscope maintainers are pleased to announce the release of diffoscope
version `57`. This version includes the following changes:

```
[Chris Lamb]
* Add myself to Uploaders.
* Add try.diffoscope.org command-line client in new binary package
  "trydiffoscope" to save installation of dependencies:
  - Open files in binary mode to support comparing binary files.
  - Optionally open URL in web browser.
  - Optionally poll locally until result is available.
  - Move to version 2 of API, don't continue to poll on error.
  - Correct and improve help text.
* Code cleanups:
  - Tidy PROVIDERS dict in diffoscope/__init__.py.
  - Tidy OS_NAMES dict.
  - Correct indentation levels in various files.
  - Drop unused imports.
  - platform.get_linux_distribution() will break in Python 3.7.
  - Don't name first argument of Difference.from_command "cls" as it's not a
    classmethod.
  - comparators/directory.py: Call logger.warning over logger.warn.
  - Rename diffoscope.__main__ to diffoscope.main as its not a "real" magic
    name.
  - Raise NotImplementedError() instances over NotImplemented classes.
  - Add short option for trydiffoscope --url.
  - Rewrite trydiffoscope to match diffoscope's command-line API.
  - Use keepalive in trydiffoscope client to avoid new HTTP requests.
  - Highlight lines via HTML/CSS when hovering over a line to make it easier
    to visually track.
  - Rename debian/install -> debian/diffoscope.install now we have multiple
    binary packages.
* Add a JSON comparator.
  - Add tests for JSON comparator.
  - Move parsing to JSONFile.recognizes
  - Ensure decode errors in JSON comparator are not fatal.
* Ignore /.*eggs and /.cache - they get created when running tests.
* Reflow long dh_python3 call in debian/rules.
* Use dict.get fallback to shorten OS_NAMES lookup in --list-tools.
* --list-tools:
  - Output --list-tools in RFC822 format to make parsing less brittle.
  - Print "no package mapping" in --list-tools to stderr, not stdout.
  - Remove unused ``reduce`` import.
  - Reflow long PROVIDERS lookup.
* Add .travis.yml from http://travis.debian.net/
* Don't skip squashfs test_listing test; we can workaround it, as long as we
  have a uid 1000.
* Drop "Testsuite: autopkgtest" in debian/control; it is added automatically
  by dpkg-source version 1.17.11.

[Mattia Rizzolo]
* autopkgtest: be more verbose when running the tests
* debian/control:
  - Mark build-dependency needed only for tests with a <!nocheck> build
    profile (reverted as they break dh-python)
  - add more build-dependencies to be able to run more tests at build time
  - default-jdk-headless is enough to have javap, instead of all of
    default-jdk
* debian/rules:
  - be more verbose when running the tests, in particular, show why tests are
    being skipped
  - teach pybuild where to put diffoscope's files
* do not try to execute the command if the command is not available

[Ximin Luo]
* Add support for reading LLVM bitcode files
  - Ignore line numbers because different llvm-dis versions output extra
    metadata
  - Disable the llvm-dis test if the version is lower than 3.8
* Add support for reading Rust LLVM object files
* Add test for rlib files, helping also to test ArFile, LlvmBitCodeFile and
  RustObjectFile
* Fix failing directory test
* Add support for reading the symbol table to ArFile
* Fix typo in tool_older_than
  - Remove debugging print from tool_older_than

[anthraxx]
* skip rlib test if llvm-dis tool is missing
```

You find out more by [visiting the project homepage](https://diffoscope.org).