Java™ Application Development on Linux - Dator

194Chapter 8Know What You Have: CVSused, though, to set up the project. Once a project is established, the informationin CVSROOT is kept, along with other data, in a directory of files (calledCVS). From that point on, CVSROOT (the environment variable) no longer needsto be set. The CVS commands will always use what is in the local sandbox todetermine where the repository is; the value of the environment variable willbe ignored.It is possible to have different repositories for different projects. Onerepository might be for your personal work—revisions of memos and documentsthat you create on your local machine and store in a repository also onyour local machine. Another repository might be a shared network-basedrepository, used for a project at work. Still another might be a network-basedproject for some Open Source work that you do in your spare time. Since theCVS repository keeps track of whence it comes, you needn’t set a value forCVSROOT every time you switch projects. Instead, CVS knows from within thesandbox where to go for its updates, commits, and so on.So let’s get started and create a CVS repository on our local Linux system,in our own home directory. We will call the repository srcbank, as it will bethe “bank” where we will deposit our source files.$ mkdir ${HOME}/srcbank$ export CVSROOOT="${HOME}/srcbank"$ cvs initThe mkdir creates the directory named srcbank as a subdirectory of ourhome directory. The export command sets the shell variable CVSROOT to referto the location of the new directory. The cvs init command initializes therepository with some needed directories and data files.Before the cvs init command, the srcbank directory is empty. Afterwardit contains a directory called CVSROOT (literal name, not the shell variable’svalue) which contains a variety of administrative files—most of which you neednever worry about.If your are using a remote repository, that is, one that you connect to overa network (typical when you are sharing a repository amongst team members),then you need one additional step—you need to log in to the CVS repository’sserver:$ cvs login