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21.11.01
DI Roland TRIENDL (rt@sysis.at)DI Siegfried GOESCHL (siegfried.goeschl@itserv.at)
Concurrent Version System
CVS in the Enterprise
2 2CVS within the Enterprise
Overview
§ A Closer Look at CVS
§ Acceptance of Configuration Management
§ Usability of CVS front-ends– WinCVS– Tortoise
§ Server Administration– Configuration– User Management– Tips and Tricks
3 3CVS within the Enterprise
A Closer Look at CVS
§ Used for virtually all open source project§ Client/Server enabled version control system
– Usually UNIX server– Windows NT/2000 port available
§ Supports multiple stand-alone frontends– Command line for hardliners and tools– WebCVS using browser– TkCVS using TCL/Tk– WinCVS as Win32 frontend with TCL support
§ CVS client can be integrated seamlessly with– Jbuilder– Netbeans– Together/J– Microsoft Explorer (Tortoise)
4 4CVS within the Enterprise
A Closer Look at CVS
§ Different client authentication modules available– Kerberos– Password Authentication
§ Customization with server side scripts§ Unreserved checkouts
– No file locking– Multiple developers can work on one file simultanously– Watches can be used to notify other developers– Manual file locking is still possible
§ Simple user management§ CVS and ANT make a good combination for
automated build
5 5CVS within the Enterprise
Acceptance of CM
Forces of Configuration Management
– structured work
– binding deliveries
– binding schedules
– well organized workspace
– where is the source material
6 6CVS within the Enterprise
Acceptance of CM
workflows (RUP)– Core Process Workflows
• Business Modelling (Geschäftsprozeß Modellierung)• Requirements (Anforderungs Management)• Analysis & Design (Analyse und Design)• Implementierung• Test• Deployment (Verteilung)
– Core Supporting Workflows• Change- und Configurationmanagement <-- you are here• Projektmanagement• Environment Setup
7 7CVS within the Enterprise
Acceptance of CM
packages of domain engineering
customerrequirements
domainanalysis
domaindesign
domainimplementation
domain model architecture
domainknowledge
requirementsanalysis
productconfiguration integration & test
special designspecial
development new requirements
characteristics
product
domainspecific languages,components and generators
8 8CVS within the Enterprise
Acceptance of CM
source distribution (object code)
*.dir *.dxr
*.fla *.swf
*.html *.html
*.jsp *.jsp, *.class
*.psd *.gif, *.jpg
*.mid *.au, *.wav, *.mp3
*.java *.class
Sourcecode vs. Object Code
9 9CVS within the Enterprise
Acceptance of CM
§ configuration management– iterative process, based on the material created during the
production of software
§ parts of a release
Source Material Distribution Material Release Package Installed Productproduce/compile packaging install/deploy
*.jpg
*.wml
*.jsp
*.xml
*.wbmp
*.prop
*.html
*.class
*.gif
Release
10 10CVS within the Enterprise
Acceptance of CM
§ Configuration Management
– management of documents and source code– production if installable versions of a software– tool supported production of documents– distributed teamwork– concurrent access to documents and sourcecode– management of software versions– freezing a certain state of the development process– working on serveral versions of a product at the same time
11 11CVS within the Enterprise
Acceptance of CM
Advantages of CM
– increased team productivity
– improved individual productivity
– simplified software maintenance
– recovering at a defined level of development possible
– authorized and supervised modifications
12 12CVS within the Enterprise
Acceptance of CM
rules for working in a local workspace
1. working locally is completely OK (CVS)
2. hand over complete state of work at certain times
3. hand over complete work including source daily
4. project management needs to have access to your revisionsof work
5. automatic backup possible for the CVS repository
13 13CVS within the Enterprise
Acceptance of CVS
Checkout Module
Update CommitAdd
Remove
Create Tag
Erase (filesys)
Edit / Unedit
Modify
Merge
Import Module
Update
Working with CVS
Export
14 14CVS within the Enterprise
Acceptance of CM
1. checkout project (module) into your lokal workspace2. unlock required files if necessary3. add new files into cvs database (repository)4a. modify files in your workspace using your preferred tools4b. there is no renaming, remove files with cvs tool and add new once
again5. commit modified files to store new revision in cvs database
x. periodically update the whole module to get modifications of teammembers
y. dont forget to commit and update your modified files before leaving theoffice
z. periodically create tagged releases with assigned version numbers(freezing the product)
note: most actions require a final commit
15 15CVS within the Enterprise
Usability of CVS Frontends
WinCVS, MacCVS Tortoise
16 16CVS within the Enterprise
Usability of CVS Frontends
NetbeansIntegration
17 17CVS within the Enterprise
TortoiseCVS
checkout module
18 18CVS within the Enterprise
Tortoise CVS
checkout module
19 19CVS within the Enterprise
Tortoise CVS
Add &Commitfile
20 20CVS within the Enterprise
CVSWeb viewing revisions of files
21 21CVS within the Enterprise
CVS modules
Motivation
– seperate cvs modules for every development project
– you can label (tag) a project on module level to freeze it
– support cross unit teamwork for customer projects
– support domain engineering process
– support reuse
22 22CVS within the Enterprise
CVS export and java
Manifest File (MANIFEST.MF)Specification-Title: MessagingPlatform2Specification-Version: 2.1Specification-Vendor: sysis agImplementation-Title: MessagingPlatform2Implementation-Version: 2.1Implementation-Vendor: sysis agPackage-Name: at.sysis.messagingCM-module: messaging2CM-tag: $Name: $
23 23CVS within the Enterprise
User Management
§ Usage of PSERVER allows user authentication– Password is sent unencrypted– Potential security breach
§ PSERVER allows simple user management– CVSROOT/passwd contains CVS users with encrypted
password and map them to existing Unix user accounts– The Unix user accounts either belong to cvs and cvsadmin– CVSROOT/readers contains all readers– CVSROOT/writers contains all writers– Certain commands can only be executed by members of
group cvsadmin
§ How do you create an encrypted password ?!
24 24CVS within the Enterprise
User Management
cryptout.pl
#!/usr/bin/perl# Create encrytped password manually without changing the# password of an existing user
srand (time());my $randletter =
"(int (rand (26)) + (int (rand (1) + .5) % 2 ? 65 : 97))";my $salt = sprintf ("%c%c", eval $randletter, eval $randletter);my $plaintext = shift;my $crypttext = crypt ($plaintext, $salt);
print "${crypttext}\n";
25 25CVS within the Enterprise
User Management
Group Write Access Update CVSROOT Delete Revisions
READER CVS No No No
WRITER CVS Yes No No
ADMIN CVSADMIN Yes Yes Yes
The best you can achieve (without too many tricks)
26 26CVS within the Enterprise
Server Administration Tips and Tricks
§ Executable files under UNIX– If „x“ is set in the repository you get an executable copy
§ Removing a directory– You have to delete all files and then update with the –P
option (prune empty directories)
§ Moving files without losing revision history– Copy the RCS files into the new directory– Remove the files in the working copy– Remove files from CVS– Commit
§ Export of projects– No CVS directories and metadata– cvs -d $CVSROOT export -r LABEL -d DIR
27 27CVS within the Enterprise
Server Administration Tips and Tricks
§ Turning on the historical logging– We sometimes would like to know what our users are
doing?!– Enable usage of history file in CVSROOT/config– set “LogHistory=TOFEWGCMAR” or “All”Make
CVSROOT/history writeable for everybody
28 28CVS within the Enterprise
This is the End, my Friend ....
Any questions !?
29 29CVS within the Enterprise
Resources
Online Resources
§ CVS Home : http://www.cvshome.org§ CVS Frontends : http://www.cvsgui.org§ CVS Bubbles : http://www.loria.fr/~molli/cvs-index.html§ CVS FAQ : http://www.loria.fr/~molli/fom-serve/cache/1.html§ Cederqvist et al : http://www.loria.fr/~molli/cvs/doc/cvs_toc.html§ CVS Book : http://cvsbook.red-bean.com/cvsbook.html§ WinCVS Guide : http://www.computas.com/pub/wincvs-howto§ WebCVS : http://stud.fh-heilbronn.de/~zeller/cgi/cvsweb.cgi/
Tools§ WinMerge: http://winmerge.sourceforge.net/
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