git bundle — pack an entire repo into a single portable file

git-bundle.sh

# git bundle — the git sneakernet
# No network. Air-gapped machine. USB drive. It still works.

# Pack everything — every ref, every object:
git bundle create repo.bundle --all

# Verify the bundle is self-contained:
git bundle verify repo.bundle

# Clone from the bundle (it's a valid git remote):
git clone repo.bundle local-copy

# ── Delta bundle — only what's new ────────────────────────────
# Efficient sync: bundle only commits ahead of a known-good tag:
git bundle create delta.bundle main ^v2.3.0

# Apply on the other side:
git fetch delta.bundle main:main

# ── Common scenarios ──────────────────────────────────────────
# Full offline backup:   git bundle create backup.bundle --all
# Sync air-gapped host:  git bundle create delta.bundle main ^last-synced-tag
# Email a PR:            git bundle create pr.bundle feature ^main