Re: VCS comparison table

Aaron Bentley wrote:

Petr Baudis wrote:

quoted

quoted

this only makes sense if
you have a fast access to the repository (otherwise, you consider your
local repository as a cache, and you're ready to pay the disk space
price to save your bandwidth). In this case, it's often in your
filesystem (local or NFS).

So how is the light checkout actually implemented? Do you grab the
complete new snapshot each time the remote repository is updated?

No, the lightweight checkouts store very little.  They have
- a copy of tree shape (filenames, paths, sha1 sums) from the last
  commit.
- a copy of tree shape for the current working directory
- a map from stat values to sha-1 hashes

Ah. So in git terminology it stores index and working directory
(and perhaps the name of branch). 

-- 
Jakub Narebski
Poland