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Advanced Git Features

1. Binary Handling & Large File Support

Git Large File Storage (LFS): Replaces large files (e.g., videos, images, datasets) with pointers and stores them separately to avoid bloating the repository.
Git Annex: Alternative to LFS, allowing managing large/binary files outside Git while keeping track of them.
Delta Compression & core.bigFileThreshold: Git handles binary files poorly due to diff-based storage; this setting optimizes performance for large binaries.

2. Submodules & Subtrees

Git Submodules: Enables linking another repository within a repository (useful for dependencies, libraries).
- Requires manual updates (git submodule update --init --recursive).
- Challenges: Version tracking, nested submodules, and additional complexity.
Git Subtree: An alternative that allows merging and splitting subprojects into a main repository with easier management (git subtree add/push/pull).

3. Worktrees

Git Worktrees: Allows working on multiple branches simultaneously in different directories without cloning the repo multiple times (git worktree add).
Use cases: Parallel feature development, handling hotfixes while working on a big feature branch.

4. Refs, Reflogs, and the Git Object Model

Reflogs (git reflog): Tracks branch movements and allows recovery of lost commits.
Loose & Packed Objects: Understanding blobs, trees, commits, and tags.
Alternate Object Storage (.git/objects/info/alternates): Allows sharing objects between repositories.

5. Advanced History Manipulation

Interactive Rebase (git rebase -i): Rewriting commit history (squash, fixup, reordering).
Filter-Branch & git filter-repo: Cleaning repository history (e.g., removing sensitive data).
Commit Graph (git commit-graph and git gc): Improves performance for large repositories.

6. Sparse Checkouts & Partial Clones

Sparse Checkout (git sparse-checkout): Allows working with only a subset of a repository’s files (useful for monorepos).
Partial Clone (git clone --filter=blob:none): Clones a repo without downloading all blobs initially, fetching them on-demand.

7. Git Hooks & Custom Workflows

Client-side Hooks (.git/hooks/): Automation before/after commits, pushes, merges (e.g., linting, security checks).
Server-side Hooks: Enforcing policies on a shared repository (e.g., preventing force pushes).
Custom Merge Drivers: Handling specific merge scenarios for non-text files.

8. Signed Commits & Secure Collaboration

Signed Commits (git commit -S): Verifying commit authorship (GPG/SSH signatures).
Signed Tags (git tag -s): Ensuring tag authenticity.
Git Verify & git fsck: Checking repository integrity.

9. Bisecting & Debugging

Git Bisect (git bisect start): Finding the commit that introduced a bug by binary search.
Git Blame (git blame): Tracking changes in a file to specific commits/authors.
Git Grep (git grep): Searching efficiently within a repository.

10. Alternative Backends & Experimental Features

Reftables (Experimental): Aims to improve reference storage performance.
Git with Different Backends: Git can store objects in alternative formats (e.g., SQLite, SHA-256 support).
Using git update-index --skip-worktree vs. assume-unchanged: Ignoring local file changes.