view comparison.txt @ 405:99470ae6b424

Check if repository exists

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Check if repository exists

From: Goffredo Baroncelli <[e-mail]>
Subject: Re: Trivial: in remoterepository.__init__ check if the repository
        exist

I hope that this is correct :-)

Another typo, another patch, tank to Peter Stamfest and Radoslaw Szkodzinski.

The patch is trivial: adds a check in the body of the init method of the
+remoterepository
class. Before if the path didn't exist, hg would not raise any error.

Test manually performed after the patch has been merged:

test:                                                     result
create a new repository from another local repository     OK ( no problem )
create an empty repository                                OK ( no problem )
pull from a not existent repositary                       OK ( raise an error )

(error message tweaked by mpm)

manifest hash: ac7f625a8d87c693b61718b9fc5604d28b882bbd
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                    Mercurial      git                     BK (*)
storage             revlog delta   compressed revisions    SCCS weave
storage naming      by filename    by revision hash        by filename
merge               file DAGs      changeset DAG           file DAGs?
consistency         SHA1           SHA1                    CRC
signable?           yes            yes                     no       

retrieve file tip   O(1)           O(1)                    O(revs)
add rev             O(1)           O(1)                    O(revs)
find prev file rev  O(1)           O(changesets)           O(revs)
annotate file       O(revs)        O(changesets)           O(revs)
find file changeset O(1)           O(changesets)           ?

checkout            O(files)       O(files)                O(revs)?
commit              O(changes)     O(changes)              ?
                    6 patches/s    6 patches/s             slow
diff working dir    O(changes)     O(changes)              ?
                    < 1s           < 1s                    ?
tree diff revs      O(changes)     O(changes)              ?
                    < 1s           < 1s                    ?
hardlink clone      O(files)       O(revisions)            O(files)

find remote csets   O(log new)     rsync: O(revisions)     ?
                                   git-http: O(changesets)
pull remote csets   O(patch)       O(modified files)       O(patch)

repo growth         O(patch)       O(revisions)            O(patch)
 kernel history     300M           3.5G?                   250M?
lines of code       2500           6500 (+ cogito)         ??

* I've never used BK so this is just guesses