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(cvs.info)Tracking sources

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Tracking third-party sources
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   If you modify a program to better fit your site, you probably want
to include your modifications when the next release of the program
arrives.  CVS can help you with this task.

   In the terminology used in CVS, the supplier of the program is
called a "vendor".  The unmodified distribution from the vendor is
checked in on its own branch, the "vendor branch".  CVS reserves branch
1.1.1 for this use.

   When you modify the source and commit it, your revision will end up
on the main trunk.  When a new release is made by the vendor, you
commit it on the vendor branch and copy the modifications onto the main
trunk.

   Use the `import' command to create and update the vendor branch.
When you import a new file, the vendor branch is made the `head'
revision, so anyone that checks out a copy of the file gets that
revision.  When a local modification is committed it is placed on the
main trunk, and made the `head' revision.

First import

Importing for the first time

Update imports

Updating with the import command

Reverting local changes

Reverting to the latest vendor release

Binary files in imports

Binary files require special handling

Keywords in imports

Keyword substitution might be undesirable

Multiple vendor branches

What if you get sources from several places?