Re: [PATCH v7 0/4] Importing and exporting stashes to refs

> Stashes are currently stored using the reflog in a given repository.
> This is an interesting and novel way to handle them, but there is no way
> to easily move a set of stashes across machines.  For example, groups of
> stashes cannot be bundled, pushed, or fetched.
> 
> Let's solve this problem by allowing users to import and export stashes
> to a chain of commits.  The commits used in a stash export contain two
> parents: one which is the pointer to the next exported stash (or to an
> empty commit with no parents if there are no more) and the second is the
> stash commit that would normally be stored in the reflog.
> 
> Original thread at message-ID: <20220310173236.4165310-1-sandals@crustytoothpaste.net>
> 
> Changes from v6:
> * Add Phillip's sign-off to the last patch.
> * Use `commit_list` for tracking commits.
> * Use reflog entry walker.
> * Fix some commit messages for improved legibility.
> * Rephrase some error messages for precision.
> * Drop the patch that exposes `read_complete_reflog` since it is no longer necessary.
> 
> Changes from v5:
> * Rename `parse_revision`.
> * Remove extra call to `free_stash_info`.
> * Fix parsing of existing commit.
> * Add more validation of imported stash commits.
> * Add more tests for improved validation of imported stash commits.
> * Explicitly cast `items.nr` and make the iteration counter an `ssize_t`
>    to avoid casting problems.
> * Don't require a trailing `\n\n` in commit messages.
> * Use `read_complete_reflog` to walk reflogs.
> * Be more defensive when using `lookup_commit_reference`.
> * Apply parts of Phillip's patches for improved robustness.
> * Update commit message to explain additional use cases.
> * Use `OPT_STRING` for `--to-ref`.
> 
> Changes from v4:
> * Fix another use of oid_array.
> * Fix various memory leaks.
> * Fix a segfault which appeared after a rebase.
> * Use strstr for commits since we don't need to worry about NUL.
> * Added some additional tests.
> * Verify the ident values we're using to avoid using bad values.
> * Various other code cleanups.
> * Rebase on `master`.
> 
> Changes from v3:
> * Fix strbuf handling to avoid leaks and generally be more sensible.
> * Make use of the error return code more often.
> * Use oid_array.
> * Tidy various parts of the code and fix long lines.
> * Simplify tests using git tag.
> * Shorten and tidy tests.
> * Add an additional test covering the base commit OID and importing and
>    exporting empty stashes.
> 
> Changes from v2:
> * Fix uninitialized strbuf.
> * Avoid C99-style initializations.
> 
> Changes from v1:
> * Change storage format as suggested by Junio.
> * Rename to GIT_OID_GENTLY.
> * Remove unnecessary initializations.
> * Use ALLOC_GROW_BY.
> * Ensure completely reproducible exports.
> * Avoid size_t.
> * Various other code cleanups.
> 
> brian m. carlson (4):
>    object-name: make get_oid quietly return an error
>    builtin/stash: factor out revision parsing into a function
>    builtin/stash: provide a way to export stashes to a ref
>    builtin/stash: provide a way to import stashes from a ref
> 
>   Documentation/git-stash.adoc |  29 ++-
>   builtin/stash.c              | 460 ++++++++++++++++++++++++++++++++++-
>   hash.h                       |   1 +
>   object-name.c                |   6 +-
>   t/t3903-stash.sh             |  94 +++++++
>   5 files changed, 577 insertions(+), 13 deletions(-)
>