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Example history graph of a version-controlled project, with merges as red arrows. In version control, merging (also called integration) is a fundamental operation that reconciles multiple changes made to a version-controlled collection of files.
Merge, users may freely edit files, but are informed of possible conflicts upon checking their changes into the repository, whereupon the version control system may merge changes on both sides, or let the user decide when conflicts arise. Distributed version control systems usually use a merge concurrency model.
Meld is a visual diff and merge tool, targeted at developers. It allows users to compare two or three files or directories visually, color-coding the different lines. Meld can be used for comparing files, directories, and version controlled repositories.
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).
Revision Control System (RCS) [open, shared] – stores the latest version and backward deltas for the fastest access to the trunk tip [4] [5] compared to SCCS and an improved user interface, [6] at the cost of slow branch tip access and missing support for included/excluded deltas
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 .
Mercurial has also taken steps to ease the transition for users of other version control systems, particularly Subversion. Mercurial is primarily a command-line driven program, but graphical user interface extensions are available, e.g. TortoiseHg , and several IDEs offer support for version control with Mercurial.
In the world of open source software, the Concurrent Version System (CVS) has long been the tool of choice for version control. And rightly so. CVS itself is free software, and its non-restrictive modus operandi and support for networked operation—which allow dozens of geographically dispersed programmers to share their work—fits the ...