Understanding Version Control Systems: From Manual Practices to Distributed VCS

Introduction: The article, written at readers' request, discusses the principles of Version Control Systems (VCS) to help readers understand how version management works, though it does not teach a specific technology.

Manual "human" version control: A developer named Xiao Li saves multiple copies of a file with timestamps to experiment with different solutions, leading to many duplicated files and the risk of losing work.

File locking: When working on a larger online shop project, Xiao Li and Xiao Liang encounter overwriting issues; they use a tool like BeyondCompare to compare changes, highlighting the need for a lock mechanism (checkout) before editing and a check‑in to save changes to a central server.

Lock removal and merging: After experiencing lock‑related problems, they consider removing locks and adding a merge feature, handling both non‑conflicting and conflicting changes manually or automatically.

Branching: To maintain multiple product versions, they create separate branches (V1.0 for bug fixes, V2.0 for new features) and merge changes between branches when needed, acknowledging potential conflicts.

Distributed management: As the project gains many contributors, the centralized VCS becomes a bottleneck; they adopt a distributed approach where each developer clones the central repository, works locally, and pushes changes to their own repositories before a maintainer reviews and merges them into the official repository, following a workflow similar to Git.

Naming and social features: The new VCS is named Hit, and a web‑based platform called HitHub is built to provide social features such as personal pages, project showcases, following, and activity feeds, encouraging open‑source collaboration.

Conclusion: The article emphasizes the evolution from simple manual file copies to sophisticated distributed version control systems that support locking, merging, branching, and collaborative workflows.