Can your diff(1) do this?! Improving software review and QA with diffoscope
summary
Tool called diffoscope recursively unpacks archives and converts many formats (tar, ISO, PDF, Word, SQLite, images, TCP dumps) into human-readable diffs so reviewers see the actual semantic change, not raw binary noise. Used in the reproducible builds effort and Debian build farms, it finds exact byte-level edits (example: a Java constant changed 20→64 in bytecode), offers HTML output and a web service, installs via pip/apt, and drops an 800 MB ISO compare from ~20 minutes to 35 seconds after optimization.
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chapters (29)
- 0:00Intro
- 1:03Operating system
- 1:27Progress bar
- 1:48Postscript
- 2:15Office time
- 6:07Debian
- 6:46Degenerate
- 7:48Compression
- 9:15Diffescape
- 11:00Example
- 11:19Advanced detection
- 12:11More file formats
- 12:56Supported image formats
- 13:31Image generation
- 14:32JSON
- 14:50TCP Dump
- 15:14How can you use it
- 17:03Pushing to stable
- 17:58T releases
- 18:42Bigger scope
- 19:36Command scope
- 19:52apt build order
- 21:00comparing two diffs
- 21:36parallel processing
- 23:45qualitative parenting
- 26:36comparison
- 28:44extensible
- 30:05diffscope
- 32:30security
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