cd895637b5
There is a bug in go-git which leads to it reporting broken, absolute
symlinks as modified whether they are or not:
https://github.com/go-git/go-git/issues/253
To date, the controller checks whether the repo it has run an update
on is Clean, and as a consequence will run into the bug above if a
broken symlink is in the repo. The result is that it makes and pushes
an empty commit every interval.
To work around the problem, this commit adds a more careful check of
the repo status. Each file reported as modified is validated by
checking specifically that it's not a broken symlink: if `os.Lstat`
says it's a symlink and `os.Stat` reports the (target) file is
missing, it can be ignored. (Why not just ignore any missing file?
Because a missing file might indicate some other problem, so better to
let it fail).
For convenience, I have moved a few procedures around so they can be
used more readily by go tests.
Signed-off-by: Michael Bridgen <michael@weave.works>
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