ForNeVeR/Fenrir

Pack Index: Support 8-byte offsets

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#116 opened on Mar 22, 2025

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enhancementgood first issuehelp wanted

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Description

See the code near this line: https://github.com/ForNeVeR/Fenrir/blob/0265c8e1de402e9300bfc5d59114b751dc98e90a/Fenrir.Git/PackIndex.fs#L66

Currently, we only support small offset table from the Git pack inndex files. Bigger pack files are not supported by Fenrir.

See the documentation: https://git-scm.com/docs/pack-format — "A table of 8-byte offset entries […]"

We should support this. A possible repository for testing (manual for now probably?) would be https://github.com/JetBrains/intellij-community

Contributor guide

Research direction
Study the Git pack format documentation for 8 byte offset entries. Examine the existing small offset implementation in PackIndex.fs and extend it to handle large offsets. Use the specified test repository to verify the changes.
Tech stack
None
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitF#binary file parsing
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70