Subversion @ JUG Milano 11 dic 2009

Subversion

Why I need a version control system?

How many VCS?

How many VCS?
CVS Subversion Mercurial Git Bazar Perforce Visual Source Safe ...

How to choose VCS?

My project
Project SISMA
Peoples:
Software Engineers
Geophysics researchers and PhD
Artifact:
Word Documents
reStructuredText documents
Computational softwares (Bash, C, C++, Fortran)
Other project (Java)
Security concerns:
Authorizations and Authentication needed
Other constraints:
Big repo, need of sparse checkout
Binary data
Clients needed for Windows, Mac and Linux

My Choice
Subversion
Reasons:
Central repository model
Path Based authorization
Selective checkout
Fewer concepts
HTTP Friendly (subset of WebDAV)
Works on Linux, Mac and Windows
Word comparison (through TortoiseSVN)

Central Repository Architecture Central Repository working copy svn client working copy svn client working copy svn client web browser r/w r/w r/w ro  simpler to explain  No local copy of all repo  only online operations Fewer concepts

Fewer concepts Commit Update Push Pull Staging Index Porcelain Plumber Commit Update Push Pull Commit Update GIT HG Subverion

Clients
Linux and Mac: svn client
Windows: TortoiseSVN
$ svn help usage: svn <subcommand> [options] [args] Subversion command-line client, version 1.6.3. Type 'svn help <subcommand>' for help on a specific subcommand. Type 'svn --version' to see the program version and RA modules or 'svn --version --quiet' to see just the version number.

Choosing Server Apache HTTP svnserve svnserve over SSH fastest! faster! Logging! no log no log easy set up SSH accounts file permissions Apache Auth SSL firewall friendly browser friendly e.g.LDAP SLOWEST

(Web) Browser Friendliness revision number access from web browsers
Use case?  Deliver a document

(Web) Browser Friendliness
Pick a specific revision (after svn 1.6)

Authentication and Authorization (corporate secrets)
Why bother about?
Because is a requirement:
Copyright on some artifacts
Artifacts from different partners
Non disclosures agreements
Secrets!
How?
Path Based Authentication
( http://svnbook.red-bean.com/nightly/en/svn.serverconfig.pathbasedauthz.html )
Coarse Grained 
Difficult to maintain 
Doesn’t know anything about history 
The only choice 

Path Based Authorization (1) /etc/httpd-public/conf.d/subversion.conf <Location /svn/> DAV svn SVNParentPath /var/svn/ AuthType Basic AuthBasicProvider ldap AuthName "Subversion repository“ AuthLDAPURL ldap://127.0.0.1:389/ou=People, o=mycompany.com?uid?sub?(objectClass=*) Require valid-user AuthzSVNAccessFile /var/svn/svn-access-file.conf Options Indexes SVNListParentPath on </Location>

Path Based Authorization (2)
/var/svn/svn-access-file.conf
[groups]
mycompany = bob, alice
partner1 = charlie, bravo
[project1:/]
@mycompany=rw
@partner1=r
[project1:/secrets]
@mycompany=rw
@partner1=
[project1:/partner-contribution]
@mycompany=rw
@partner1=rw
 The real file is much bigger! 434 lines  You can split it!  If not well formatted…  Difficult to test write without actually write in the repository!

Sparse Checkout (>1.5) (big company, big data) working copy 4.1 Gb!! Central Repository 4.1 GB!!!

Tortoise SVN
Windows Client
Integrates with Windows Explorer
Supports basic operations
Check Out
Update
Commit
Show Log
Other operations
Repository Browser
Visual Comparison of Word Files
Revision Graph

Lab
Creating a local repo
Creating a repo on beanstalkapp.com
Making the first Checkout
Visual comparing Word documents
Visual comparing Images
Visualizing the history of a document
Using revision graph (with comparing)
Repo Browser con trash-cli (in locale)
Esempio di sparse checkout
Repair move

Non solo Subversion
Subversion server, local mercurial:
hgsubversion
Using some TortoiseSVN comparison facilities in TortoiseHG:
http://blog.andreafrancia.it/2009/09/how-compare-word-documents-in.html

Links
Per imparare ad usare Subversion:
http://svnbook.red-bean.com /
Per la scelta:
http :// versioncontrolblog.com/
Hosting privato (ad esempio):
http://beanstalkapp.com/
Hostint opensource (ad esempio):
http:// code.google.com/hosting/createProject
blog.andreafrancia.it:
http://blog.andreafrancia.it/2009/10/utilities-for-managing-svnignore.html
http://blog.andreafrancia.it/2009/07/il-protocollo-di-subversion-si-rinnova.html
http://blog.andreafrancia.it/2008/12/creare-un-repository-personale-svnssh.html

Visual comparison
Create a repo.
Check out the repo in a wc.
Create a Word Document and write something in it.
Commit adding the file.
Modify the document and commit again.
Show differences.

Compare with … (1/2) … with any other revision … with the previous revision

Compare with … (2/2) … with any different branch of the document

Revision Graph

Subversion @ JUG Milano 11 dic 2009

by Andrea Francia on Dec 10, 2009

Accessibility

Categories

Tags

Upload Details

Usage Rights

1 Embed 3

Statistics

Subversion @ JUG Milano 11 dic 2009 — Presentation Transcript