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Git 3.0's upcoming SHA-256 default will be a costly mistake

570 points · 536 comments · chmaynard

  1. MBCook · · focus · HN ↗
    So they’ve been talking about this for many years, planning, and finally announce when they’re going to switch the default.

    So this is the right time to post that everything they’re doing is wrong? Did you engage in all the discussions about it and how best to handle it? Whether SHA-256 was the best solution?

    I don’t see anywhere that it talks about alternate proposals or why they might have been better. Why the particular suggestions here were rejected.

    This seems like a bunch of Monday morning quarterbacking.

    1. nofunsir · · focus · HN ↗
      The plans have been on display in a cellar. Beware of the leopard.
      1. MBCook · · focus · HN ↗
        I don’t understand what this is supposed to mean.
        1. NikolaNovak · · focus · HN ↗
          It's a hitchhiker guide to the galaxy reference, where sure, something is technically available but not clearly published and there are hoops even for those who know what they're looking for.

          (No clue if it's applicable here, I'm not aware of this case, but I believe that's the reference if it helps :)

          Edit : exact quote, as Arthur's house is about to be demolished for a highway bypass:

          "But the plans were on display…”

          “On display? I eventually had to go down to the cellar to find them.”

          “That’s the display department.”

          “With a flashlight.”

          “Ah, well, the lights had probably gone.”

          “So had the stairs.”

          “But look, you found the notice, didn’t you?”

          “Yes,” said Arthur, “yes I did. It was on display in the bottom of a locked filing cabinet stuck in a disused lavatory with a sign on the door saying ‘Beware of the Leopard.

          1. Dylan16807 · · focus · HN ↗
            It's not at all applicable.
        2. fragmede · · focus · HN ↗
          nofunsir is a stoichastic parrot, matching to a bit in Hitchhikers Guide to the Galaxy, wherin the protagonist should have known to protest a plan to demolish his home where plans where clearly documented in a hard to find place that they could not have known about. It is not a good pattern match, because git has been discussing this in public on documented mailing lists for years.
          1. nofunsir · · focus · HN ↗
            No I'm not. Real thumbs here. If anything this paragraph sounds like LLM slop
            1. fragmede · · focus · HN ↗
              Run it through pangram if you want, I wrote it with my human brain. What I did not do, however, was parrot an inapplicable quote.

              In what way has git's discussion of their move been hidden away in a metaphorical basement?

              1. nofunsir · · focus · HN ↗
                I'm sure the cellar was also documented, Arthur eventually found it, did he not?

                Mailing lists are basements in 2026

                1. fragmede · · focus · HN ↗
                  Since 1999, we've had Google to help people find things. True, a mailing list isn't an Instagram reel delivered directly to your face with audio and blasted out on Fox News, but if one was interested in the development of git, an LLM or a Google search would readily tell you about the existence of those mailing lists.
              2. pcthrowaway · · focus · HN ↗
                That comment was short enough that you'd really have to be naive to think a tool could reasonably detect if it was authored by an LLM.

                Additionally, as someone who read Hitchiker's guide to the Galaxy ~3 decades ago, I managed to suspect it was a reference to it, even if the reference wasn't the most applicable

        3. zygentoma · · focus · HN ↗
          I believe it's a reference to the hitchhikers guide to the galaxy – where the plans to remove the protagonists building to build a bypass road was hidden in this way.
      2. bawolff · · focus · HN ↗
        This isn't really applicable. The plans have been talked about for a while very publicly.
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