Re: Re: [PATCH v3] builtin/clone.c: add --reject-shallow option

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lilinchao@oschina.cn

"lilinchao@oschina.cn" [off-list ref] writes:

quoted

Sorry, you may forget there is a re-read git-config under these lines

Ahhhh, thanks.  You're right that "clone" is "special" in that way
and requires unusual order---I forgot about that.

quoted

quoted

This is only for cloning from a local repository, no?  IOW, path at
this point may even be "git://github.com/git/git/" and checking with
access() does not make sense.

Ah, it is even worse.  get_repo_path() can return NULL, so mkpath()
will crash in such a case.  This must be at least

if (path && !access(mkpath("%s/shallow", path), F_OK))
is_shallow = 1;
...

So, I think the above two hunks are making the code worse.  If we
are to detect and reject cloning from the shallow repository when
going through the transport layer (i.e. "--no-local" or cloning from
"git://github.com/git/git", or "https://github.com/git/git", if it
were a shallow repository), that must be handled separately.

Sorry, I made the question simple. Reject cloning a shallow repository
should apply to all four type transport protocols. There still a bunch of
work to be done.

Sorry, but I didn't realize that this is just a work-in-progress
that shows an early "only local transport is covered" preview.  I
think, modulo that the access(mkpath()) thing should be in the "if
(is_local)" block, the patch covers the case of local transport well
enough.  I think by "four types of transport" you mean ssh://, git://
https:// etc., but they all go through the same transport API, so
hopefully once one of them, say, git://, is covered, that would take
us a long way.

Hi, after some exploration, I found that the following changes
can achieve the goal:
(around at line 1386 in builtin/clone.c)
    /* below part is my changes */
            if (reject_shallow) {
                    if (local_shallow || is_repository_shallow(the_repository)) {
                            die(_("source repository is shallow, reject to clone."));
                    }
            }
    /* end */
            update_remote_refs(refs, mapped_refs, remote_head_points_at,
                               branch_top.buf, reflog_msg.buf, transport,
                               !is_local);

as it shows, using existing method "is_repository_shallow" to detect
whether the repo is shallow or not, before "update_remote_refs"
I made some tests based on this change, and it seems ok.
what do you think about this?

Thanks.