Git is a distributed version control system (DVCS) created by Linus Torvalds in 2005. Unlike centralized systems, every Git working directory is a full-fledged repository with a complete history of changes, allowing developers to work offline without a constant connection to a central server.
How it works
Git operates on snapshots of file states rather than simple diffs. When a git commit is executed, the system records the current state of the project. The branching mechanism is implemented via pointers to specific commits, making branch creation and switching a constant-time operation.
- Staging Area: an intermediate index where changes are formatted and reviewed before being committed.
- SHA-1: every object in the Git database is identified by a unique hash code to ensure data integrity and prevent corruption.
- Merge and Rebase: core strategies for integrating changes from different development branches.
Git is utilized in projects of all scales, from small scripts to the Linux kernel and Windows source code. It provides high performance for large-scale codebases and supports complex non-linear development workflows. Industry surveys indicate that Git is the primary version control tool for over 93% of professional software engineers.