Git-subrepo

To store multiple related repositories in github closely together. I use the solution from
 ingydotnet/git-subrepo

Comparison of other git module options

Feature	Git Submodule	Custom git-subrepo	Git Subtree
Code sharing	As subdirectories	As subdirectories	As subdirectories
Dependency management	Yes	Yes	Yes
Separate history	Yes	Yes	No (merged history)
Ease of use	Complex	Moderate	Moderate
Requires additional setup	Yes	Yes	No
Updates	Manual update required	Automated updates possible	Manual update required
Storage	Reference to external repo	Full copy of external repo	Full copy of external repo
Workflow	Decentralized	Decentralized	Decentralized
Learning curve	Steep	Moderate	Moderate
Compatibility	Native Git feature	Requires installation	Native Git feature (since 1.7.11)

Key Differences

Git Submodule

• Maintains separate repository references
• Lightweight but complex to manage
• Requires explicit version pinning
• Minimal storage overhead

Custom git-subrepo

• More flexible update mechanism
• Easier to synchronize changes
• Potentially more user-friendly
• Requires additional tooling

Git Subtree

• Simplest implementation
• Merges entire repository history
• No additional tooling required
• Easier for linear project structures

Recommendation depends on specific project complexity and team workflow preferences.