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CVS and its semi-chaotic development model have become cornerstones of open-source. [14] Over time, developers have created new version control systems based on CVS in order to add features, alter the operational model, and improve developers' productivity. CVS replacement projects include CVSNT and Subversion. [15] [16]
CVSNT is a version control system compatible with and originally based on Concurrent Versions System (CVS), but whereas that was popular in the open-source world, CVSNT included features designed for developers working on commercial software including support for Windows, Active Directory authentication, reserved branches/locking, per-file access control lists and Unicode filenames.
The following table contains relatively general attributes of version-control software systems, including: Repository model, the relationship between copies of the source code repository Client–server , users access a master repository via a client ; typically, their local machines hold only a working copy of a project tree.
A version control system is a software tool that automates version control. Alternatively, version control is embedded as a feature of some systems such as word processors , spreadsheets , collaborative web docs , [ 2 ] and content management systems , e.g., Wikipedia's page history .
Specifically, CVS (Concurrent Versions System) was developed on top of RCS structure, improving scalability of the tool for larger groups, and later PRCS, [8] a simpler CVS-like tool which also uses RCS-like files, but improves upon the delta compression by using Xdelta instead.
CollabNet founded the Subversion project in 2000 as an effort to write an open-source version-control system which operated much like CVS but which fixed the bugs and supplied some features missing in CVS. [3] By 2001, Subversion had advanced sufficiently to host its own source code, [3] and in February 2004, version 1.0 was released. [4]
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PVCS Version Manager (originally named Polytron Version Control System) is a software package by Serena Software Inc., for version control of source code files. PVCS follows the "locking" approach to concurrency control; it has no merge operator built-in (but does, nonetheless, have a separate merge command). However PVCS can also be configured ...