Hello everybody,
I am working on a big project to migrate our source code from an old
system (CMS running on VMS OS) to Subversion. As far as I know there are
no tools on the like of cvs2svn that I can use (but if I'm wrong let me
know please). So the migration has to be done manually.
For legal reasons we support not only the latest version of our product
but some older ones too, i.e. if a bug if found in, let's say, version 2
then it will be fixed in version 2, 3 and 4 (given 4 is the latest).
Therefore we need to keep a source tree for each supported version. What
did, in CMS, and will, in SVN, happen is that a change in a file in
version 2 is automatically merged into version 3 and 4. When version 5
is released, the source for version 4 is copied to version 5. I don't
know whether it's a cheap copy or not in CMS but I don't care. All this
to say that there is a link between each version as one is, originally,
a copy of the previous.
What I am planning to do is the following (supposing we support version
1, 2, 3 and 4):
- version 1 will be imported exactly as extracted from CMS
- version 2 will be committed as if it was a massive change fix. To do
this I plan to make a cheap copy of version 2 and then replace
everything with what extracted from CMS. But, in version 2 I might have
new files/directories been added as well as old files/directories been
deleted. I'm planning to use svn add and svn delete to fix this
situation and then commit the changes.
- repeat the same steps for version 3 and 4
Doing the migration this way I will save a lot of disk space and will
retain the logical link between versions.
Does anybody see any potential danger in this procedure? Has anybody any
suggestions on how to improve the migration?
Any comments will be much appreciated.
Thanks
Giulio Troccoli
Linedata Services (UK) Ltd
Registered Office: Bishopsgate Court, 4-12 Norton Folgate, London, E1 6DB
Registered in England and Wales No 3027851 VAT Reg No 778499447
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Received on Fri Oct 5 13:26:19 2007