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RCS Overview: Version Management System for Linux/UNIX Projects

Learn about RCS, a version management system for managing files and documents in small to medium-sized projects on Linux and UNIX. Discover the command set, useful features, and where RCS can be applied. Explore alternatives to RCS like CVS.

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RCS Overview: Version Management System for Linux/UNIX Projects

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  1. RCS The Revision Control System

  2. To Be Covered… • An RCS overview • The RCS command set • Some useful things • Where it can be used • Alternatives to RCS

  3. RCS Overview • RCS is for version management. • RCS allows you to manage and maintain files/documents as they develop. • RCS can maintain binary files as well as text files. • Files can be developed by multiple users. • All versions are stored as a single file.

  4. RCS is… Open Source Available for all Linux/UNIX distros Bundled with most Linux distros Free! RCS is not… The be-all end-all version management tool Available for Windows (see WinRCS) RCS Overview

  5. RCS Commands • Primary Commands: • ci # Check In • co # Check Out • rcs # set/change attributes of RCS file

  6. Example • The RCS file is • /home/fred/RCS/colours,v • Working from /home/fred/ • co –l colours # Check out and lock a copy # of colours from the RCS file • When done editing, check it back in • ci colours

  7. Example (cont’d) • Add access for another user • rcs –abarney colours • Now “barney” can check out, modify and check in colours. • See the rcs and rcsintro man pages for all rcs options.

  8. Other RCS Commands • rlog # Summary header info from the RCS file • ident # Extract keywords from RCS file or working file • rcsdiff # Compare checked out file with latest revision in RCS file • rcsmerge #Like merge, only using RCS files (not checked out copies) • rcsclean #Removes all working copies that have not been changed.

  9. Useful RCS commands Borrowing from the /home/fred/RCS/colours,v example (working in fred): • rcsdiff colours # compare • your working copy to the most • recent revision in the RCS • file

  10. Useful RCS commands rlog colours | more • View all revision header info • in the RCS file ci -l colours • Check in and then check out • and lock your working version. • Handy for quickly setting a • checkpoint in development.

  11. Useful RCS commands ident colours • View keyword values from your • working version. ident RCS/colours,v • View keyword values from your • entire RCS file. rcsclean colours • Remove all working files that • have not changed from the RCS • file’s latest revision.

  12. Where To Use RCS Small to Medium sized projects such as: • Script development for admins, developers and users. • Document and documentation development (how many versions of your resume do you have?) • Program development • http://www.cs.purdue.edu/homes/trinkle/RCS

  13. Alternatives to RCS • CVS – Concurrent Versions System • A superset of RCS • Concurrent multi-user • Can be used over a network • Manages entire directory hierarchies • Commonly preferred for large-scale development • http://cvshome.org • Pay-tools (‘nuff said)

  14. Summary • RCS is free software • RCS is conveniently bundled for Linux • RCS is easy to learn and use • RCS is a fully functional version management system

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