[SVN-790] Allow transaction roots as copy sources in the filesystem.

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: all
• Fix Version/s: unscheduled
• Component/s: libsvn_fs_base
• Assignee: Unassigned
• Reporter: Subversion Importer
• Created: 11/Jul/02 17:50
• Updated: 27/Oct/18 16:40
• Resolved: 05/Oct/05 16:48

Description

Note: this can probably be post 1.0, but just entering this as an FYI.

Ben was mentioning to me the deal about ensuring higher RevisionIDs 
mean newer timestamp values. Apparently doing this in cvs2svn is 
fairly complicated. (I took Ben and Ben's report of Greg saying this was 
hard/maybe impossible as true.) 

It'd be nice to insert every revision in time stamp order. 

I looked at the schema wondering if it was possible for cvs2svn to 
create a bunch of pending transactions and commit all of the 
transactions at once in correct time stamp order.

The only thing that blocked us from doing this was the Copy table. 
Specifically, SRC-Rev-ID. 

If we changed SRC-Rev-ID to SRC-Txn-ID this problem would go away.

If we did this, we'd need to add additional logic at commit time to 
verify that any new Copy rows being committed in the Transaction 
we're trying to commit didn't reference a SRC-Txn-ID that hasn't been 
committed yet. This is necessary to prevent odd Copy records from 
getting inserted.

We can get away with this because the Transaction table should always 
contain a pointer to the root node of the transaction. This is 
semantically equivalent to the existing SRC-Rev-ID.

Additionally, it'd make changing to handle importing a pending 
transaction from a distributed repository for examination, conflict 
resolution, etc simple since branches/file renames need to be 
importable.

Definately not necessary for 1.0, but it does allow cvs2svn to commit 
everything in timestamp order.

Original issue reported by rassilon

Issue Links

• duplicates: SVN-436 libsvn_fs/tree.c:txn_body_copy() - Allow copies from txn roots
• is duplicated by: SVN-789 Copy table should probably use TransactionID instead of RevisionID