Version Control

If you are installing SIPE-2 for the first time, you can skip the rest of this section.

All AIC systems are stored by system name as subdirectories of the aic-export directory which is created during unpacking (e.g., aic-export/sipe). (The examples in this section assume you are connected to the parent of aic-export.) Each version of a system is in a subdirectory (of the system name) that is its release number (e.g., aic-export/sipe/4.5 contains SIPE-2 version 4.5). The version of each system in current use is denoted by a symbolic link named released (e.g., sipe/released links to sipe/4.5). New versions of systems will appear in new version subdirectories, leaving the old versions intact. To change the version of a system that is being used, simply reset this link. All released links will be updated to the latest versions during unpacking of a new version.

Old versions of systems can be retained as a backup or deleted. For example, version 4.5 of SIPE-2 can be deleted as follows:

        % rm -r -f aic-export/sipe/4.5

Before September, 1994, SRI distributions did not use version numbers. If you are upgrading a distribution created before then, it is necessary to do one of the following:

1. Create a separate copy of the entire aic-export tree. This is done by unpacking the new distribution in a different location than the existing aic-export (see next section).
2. Delete the existing aic-export tree as follows:

    
         % rm -r -f aic-export

3. Keep both versions on the disk. This is accomplished by renaming the existing released subdirectories as follows:

    
         % cd aic-export
         % mv sipe/released sipe/old  
         % mv grasper/released grasper/old  
         % mv library/released library/old