jj-vcs/jj

FR: Allow exclusions in sparse checkouts

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#1,896 opened on Jul 22, 2023

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good first issuepolish🪒🐃

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Description

I'd like to be able to specify a few prefixes to exclude from my working copy.

Currently jj sparse set only allows positive patterns. To get what I want, I have to

  • jj sparse set --clear
  • jj sparse set --add everything except the patterns I want to exclude
  • continually repeat that previous step as new paths are introduced

It would be a lot more convenient to just be able to do something like jj sparse set --remove someprefix, or add some negated prefixes via jj sparse set --edit and have it work.

Contributor guide

Research direction
The issue requests adding exclusion support to `jj sparse set`. Investigate the sparse checkout implementation in the jj codebase, likely in a file like `lib/src/sparse.rs` or similar. Look for how patterns are currently handled and consider adding a negation syntax (e.g., prefix with `!` or a separate ` remove` flag). Review any existing tests for sparse set to ensure new functionality is properly tested.
Tech stack
rust
Domain
clitooling
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.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Familiarity with RustUnderstanding of jj's sparse checkout logic
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
40