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3.1.2 Creating Files From Other Version Control Systems
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If you have a project which you are maintaining with another version
control system, such as RCS, you may wish to put the files from that
project into CVS, and preserve the revision history of the files.
From RCS
If you have been using RCS, find the RCS files--usually a file
named `foo.c' will have its RCS file in `RCS/foo.c,v' (but it
could be other places; consult the RCS documentation for details).
Then create the appropriate directories in CVS if they do not
already exist. Then copy the files into the appropriate
directories in the CVS repository (the name in the repository must
be the name of the source file with `,v' added; the files go
directly in the appropriate directory of the repository, not in an
`RCS' subdirectory). This is one of the few times when it is a
good idea to access the CVS repository directly, rather than using
CVS commands. Then you are ready to check out a new working
directory.
The RCS file should not be locked when you move it into CVS; if it
is, CVS will have trouble letting you operate on it.
From another version control system
Many version control systems have the ability to export RCS files
in the standard format. If yours does, export the RCS files and
then follow the above instructions.
Failing that, probably your best bet is to write a script that
will check out the files one revision at a time using the command
line interface to the other system, and then check the revisions
into CVS. The `sccs2rcs' script mentioned below may be a useful
example to follow.
From SCCS
There is a script in the `contrib' directory of the CVS source
distribution called `sccs2rcs' which converts SCCS files to RCS
files. Note: you must run it on a machine which has both SCCS and
RCS installed, and like everything else in contrib it is
unsupported (your mileage may vary).
From PVCS
There is a script in the `contrib' directory of the CVS source
distribution called `pvcs_to_rcs' which converts PVCS archives to
RCS files. You must run it on a machine which has both PVCS and
RCS installed, and like everything else in contrib it is
unsupported (your mileage may vary). See the comments in the
script for details.
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