[PATCH 1/3] t9350: point out that refs are not updated correctly

This happens only when the corresponding commits are not exported in the current fast-export run. This can happen either when the relevant commit is already marked, or when the commit is explicitly marked as UNINTERESTING with a negative ref by another argument.

This breaks fast-export based remote helpers, as they use marks files to store which commits have already been seen. The call graph is something as follows:

$ # push master to remote repo $ git fast-export --{im,ex}port-marks=marksfile master $ # make a commit on master and push it to remote $ git fast-export --{im,ex}port-marks=marksfile master $ # run `git branch foo` and push it to remote $ git fast-export --{im,ex}port-marks=marksfile foo

When fast-export imports the marksfile and sees that all commits in foo are marked as UNINTERESTING (they have already been exported while pushing master), it exits without doing anything. However, what we want is for it to reset 'foo' to the already-exported commit.

Either way demonstrates the problem, and since this is the most succint way to demonstrate the problem it is implemented by passing master..master on the commandline.

Signed-off-by: Sverre Rabbelier <srabbelier@gmail.com>
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 t/t9350-fast-export.sh |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)