[PATCH 0/2] repack -ad: fix after `fetch --prune` in a shallow repository

Under certain circumstances, commits that were reachable can be made unreachable, e.g. via `git fetch --prune`. These commits might have been packed already, in which case `git repack -adlf` will just drop them without giving them the usual grace period before an eventual `git prune` (via `git gc`) prunes them.

This is a problem when the `shallow` file still lists them, which is the reason why `git prune` edits that file. And with the proposed changes, `git repack -ad` will now do the same.

Reported by Alejandro Pauly.

Johannes Schindelin (2):
  repack: point out a bug handling stale shallow info
  repack -ad: prune the list of shallow commits

 builtin/repack.c         |  4 ++++
 t/t5537-fetch-shallow.sh | 27 +++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)

base-commit: e3331758f12da22f4103eec7efe1b5304a9be5e9
Published-As: https://github.com/gitgitgadget/git/releases/tags/pr-9%2Fdscho%2Fshallow-and-fetch-prune-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-9/dscho/shallow-and-fetch-prune-v1
Pull-Request: https://github.com/gitgitgadget/git/pull/9