Revision Control - PowerPoint PPT Presentation

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Revision Control

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CVS resources. CVS - http://www.cvsnt.com/cvspro/ Tortosise Client - http: ... Essential CVS by O'Reilly. Component Software RCS www.componentsoftware.com ... – PowerPoint PPT presentation

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Title: Revision Control


1
Revision Control
  • Daniel Daugherty
  • Email Daniel_cfug_at_danield.us

2
Introduction
  • This presentation will give an overview of
    Revision control
  • What is can be used for
  • Common Terms
  • Who and what can benefit from revision control
    software
  • How to implement revision control software.

3
Agenda
  • List the topics to be covered
  • List the times allotted to each

4
What is Revision Control
  • Revision Control software is software that keeps
    track of multiple version of one or more files.
  • Allows for retrieval of previous versions of a
    file(s)
  • Most provide the ability to provide a description
    of changes made in the version being checked in.

5
Vocabulary
  • Repository Place where a group of revision
    control files live.
  • Revision A version of file or group of files.
  • Check-in Sends a copy of the current file(s) to
    the repository. Which are then assigned a new
    revision.
  • Check-out Retrieves and possibly locks the
    current file(s)
  • Merge Action of taking 2 version of a file and
    combining the changes.
  • Branch A separate copy of file to allow
    parallel development with in source control.

6
Why use Revision Control
  • Prevent the Last to Save WINS situation
  • Provides a consistent and reliable method to keep
    copies of pervious versions of a file.
  • Keeps a log of who made changes and description
    of what changes were made.
  • Can allow development on multiple version of an
    application at the same time
  • Example Bug Fix for current production
    site/application
  • Development of new version

7
How to set up Revision Control
  • Chose what revision control software you are
    going to use.
  • Setup repository(s)
  • Setup Securtiy (if supported)
  • Install Client
  • Import files into repository
  • Update working directory
  • Checkout file(s) if using file locking
  • Edit
  • Commit Changes
  • Update working directory

8
What can Revision Control be used for
  • Source Code
  • Configuration files
  • Requirement and Design documents
  • Marketing Material
  • Images
  • Any type of file.
  • Binary file have some limitation with most
    revision control software.

9
Locking files VS Concurrent Edit
  • Locking -
  • great for hard to merge items (binary files).
  • Can cause conflict when multiple people need the
    same file.
  • requires connection to the repository to obtain a
    lock to allow editing
  • Concurrent editing
  • no conflict for control of a file for editing.
  • no connection to the repository needed to begin
    editing a file
  • If two edit occur on the same file a merge is
    required.

10
Branching and Merging
  • Branching Allows for two or more concurrent
    copies of code to exist in source control for a
    single application. For example -
  • The current Production version of a web site.
  • And the new 2005 version with new look and feel
    and increased feature set.
  • Merging Merging as covered earlier allow
    different versions of files to be compared and
    the changes consolidated into a single new
    version. This functionality can also be used to
    bring changes from one branch to different
    branch.

11
Summary
  • Revision control give you control over your
    documents
  • Can be used for any type of document
  • Many different types with different features and
    costs.

12
Where to Get More Information
  • Comparison of different revision control software
  • http//better-scm.berlios.de/comparison/comparison
    .html
  • Sub Version links
  • Subversion - http//subversion.tigris.org/
  • OReilly Sub version book - http//svnbook.red-bea
    n.com/
  • Tortosise Client - http//tortoisesvn.tigris.org/
  • CVS resources
  • CVS - http//www.cvsnt.com/cvspro/
  • Tortosise Client - http//www.tortoisecvs.org/
  • Essential CVS by OReilly
  • Component Software RCS www.componentsoftware.com
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