OPMHASH(1)

📦
version 2025.10 · 4 versions
, in ubuntu questing, ubuntu resolute, ubuntu stonking

✨ OPMHASH ✨

okay bestie, gather round, because this one is literally the ✨vibe-check tool✨ for Eclipse decks and it's giving main character energy. The name is opmhash — a hasher for summary keywords in Eclipse files. periodt. 💅

🌸 SYNOPSIS 🌸

opmhash [OPTIONS] ECL_DECK_FILENAME [ECL_DECK_FILENAME_2]
[ECL_DECK_FILENAME_3] [...]

💖 DESCRIPTION 💖

so like, the whole purpose of opmhash is that it loads a deck and creates a summary, and then — here's the iconic part — by diffing two such summaries it becomes super simple to figure out whether two decks are similar. no cap. 🦋

For each keyword, a hash of the normalized content is calculated. and the output? it's giving this, exactly:

RUNSPEC
       : 13167205945009276792

TITLE  : 16047371705964514902

DIMENS : 1264233216877515756

NONNC  : 10052807539267647959

OIL    : 6013609912232720008

WATER  : 14106203893673265964

Total  : 7362809723723482303

Where that 'random' integer sitting after each keyword is the hash of the content of that keyword. 🎀

ngl the hashing is insensitive to changes in white-space, comments, and file location — so move stuff around all you want, the hash does not care, she's unbothered. 💅

At the bottom comes a total hash of the complete content. And here's the plot twist bestie: the hash of each keyword is insensitive to shuffling of keywords, but the total hash depends on the keyword order. so order matters for the total, iykyk. 👑

✨ OPTIONS ✨

  • -l — add filename and linenumber information to each keyword. lowkey so you know where each lil keyword lives. 🍓
  • -s — short form: only print the hash of the complete deck. minimal, clean, ate. ✨
  • -S — silent form: will not print any deck output at all. she's quiet, she's mysterious. 🤫

It is possible to add multiple deck arguments, and when you do, they are then scanned repeatedly and the decks are compared. In the case of multiple deck arguments, the exit status of the program will be zero if all are equal and nonzero in case of differences. so that exit code is literally your vibe check. 🌈

ngl if you're scripting with this, that exit status is the whole point — equal decks = 0, different decks = not 0. no notes. 💀

okay that's the whole thing, bestie, go hash some decks and slay 💖 this was opmhash from April 2025, mwah, bye 👑🎀🦋

📦 where this page comes from