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ViewVC (formerly ViewCVS) is an open-source tool for viewing the contents of CVS and SVN repositories using a web browser.It allows looking at specific revisions of files as well as side-by-side diffs of different revisions.
To compare a revision with its predecessor, click prev. To compare two specific revisions, click the left-column radio button of the older revision and the right-column radio button of the newer revision, and then click the "Compare selected revisions" button. To undo (revert) your own or someone else's edit, click the "undo" link.
Source Code Control System (SCCS) [open, shared] – part of UNIX; based on interleaved deltas, can construct versions as arbitrary sets of revisions; extracting an arbitrary version takes essentially the same time and is thus more useful in environments that rely heavily on branching and merging with multiple "current" and identical versions
Apache Subversion (often abbreviated SVN, after its command name svn) is a version control system distributed as open source under the Apache License. [1] Software developers use Subversion to maintain current and historical versions of files such as source code , web pages, and documentation.
The granularity of control varies. Subversion, for example, can be configured to handle EOLs differently according to the file type, whereas Perforce converts all text files according to a single, per-client setting. Tags: indicates if meaningful names can be given to specific revisions, regardless of whether these names are called tags or labels.
The MediaWiki software sometimes enables editors to easily revert (undo) a single edit from the history of a page, without simultaneously undoing all constructive changes that have been made since. To do this, view the page history or the diff for the edit, then click on "undo" next to the edit in question. The software will attempt to create ...
Do not revert a large edit because much of it is bad, and you do not have time to rewrite the whole thing. Instead, find even a bit of the edit that is not objectionable and undo the rest. (To do this, you can use the "undo" button, then type or copy back in what you want to keep). If a supporter of the reverted edit wants to save more of it ...
Manual merging is also required when automatic merging runs into a change conflict; for instance, very few automatic merge tools can merge two changes to the same line of code (say, one that changes a function name, and another that adds a comment). In these cases, revision control systems resort to the user to specify the intended merge result.