From: "brian m. carlson" <sandals@crustytoothpaste.net>
To: Eric Sunshine <sunshine@sunshineco.com>
Cc: "Git List" <git@vger.kernel.org>, "René Scharfe" <l.s.r@web.de>,
"Duy Nguyen" <pclouds@gmail.com>
Subject: Re: [PATCH 10/31] object-store: rename and expand packed_git's sha1 member
Date: Thu, 14 Feb 2019 03:33:16 +0000 [thread overview]
Message-ID: <20190214033315.GK684736@genre.crustytoothpaste.net> (raw)
In-Reply-To: <CAPig+cS3i2FWf6mFmpPpctyJJbx4xdHgWXrveRUkjMHct5SbJg@mail.gmail.com>
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On Mon, Feb 11, 2019 at 10:32:15PM -0500, Eric Sunshine wrote:
> On Mon, Feb 11, 2019 at 8:23 PM brian m. carlson
> <sandals@crustytoothpaste.net> wrote:
> > This member is used to represent the pack checksum of the pack in
> > question. Expand this member to be GIT_MAX_RAWSZ bytes in length so it
> > works with longer hashes and rename it to be "hash" instead of "sha1".
> > [...]
> > Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
> > ---
> > diff --git a/builtin/pack-redundant.c b/builtin/pack-redundant.c
> > @@ -689,7 +689,7 @@ int cmd_pack_redundant(int argc, const char **argv, const char *prefix)
> > while (pl) {
> > printf("%s\n%s\n",
> > - sha1_pack_index_name(pl->pack->sha1),
> > + sha1_pack_index_name(pl->pack->hash),
>
> I guess there is no oid_pack_index_name() function yet?
Correct, although see below.
> > diff --git a/http-walker.c b/http-walker.c
> > @@ -434,7 +434,7 @@ static int http_fetch_pack(struct walker *walker, struct alt_base *repo, unsigne
> > if (walker->get_verbosely) {
> > fprintf(stderr, "Getting pack %s\n",
> > - sha1_to_hex(target->sha1));
> > + sha1_to_hex(target->hash));
>
> Should this have become oid_to_hex()?
No, I think what's misleading here is that the member for both is named
"hash". This is a struct packed_git, not a struct object_id. The reason
I didn't convert this to a struct object_id is because this isn't
actually an object ID, it's a pack checksum hash.
I've tried to be diligent about separating the object IDs from other
hashes because I think it makes it easier to reason about the code, but
also because it may help us avoid tricky behavior when we have to deal
with multiple algorithms for input and storage.
--
brian m. carlson: Houston, Texas, US
OpenPGP: https://keybase.io/bk2204
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next prev parent reply other threads:[~2019-02-14 3:33 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-12 1:22 [PATCH 00/31] Hash function transition part 16 brian m. carlson
2019-02-12 1:22 ` [PATCH 01/31] t/lib-submodule-update: use appropriate length constant brian m. carlson
2019-02-12 1:22 ` [PATCH 02/31] pack-bitmap: make bitmap header handling hash agnostic brian m. carlson
2019-02-12 1:22 ` [PATCH 03/31] pack-bitmap: convert struct stored_bitmap to object_id brian m. carlson
2019-02-12 1:22 ` [PATCH 04/31] pack-bitmap: replace sha1_to_hex brian m. carlson
2019-02-12 6:37 ` Jeff King
2019-02-13 0:00 ` brian m. carlson
2019-02-14 4:41 ` Jeff King
2019-02-12 1:22 ` [PATCH 05/31] pack-bitmap: switch hard-coded constants to the_hash_algo brian m. carlson
2019-02-12 11:13 ` Ævar Arnfjörð Bjarmason
2019-02-12 1:22 ` [PATCH 06/31] submodule: avoid hard-coded constants brian m. carlson
2019-02-12 1:22 ` [PATCH 07/31] notes-merge: switch to use the_hash_algo brian m. carlson
2019-02-12 1:22 ` [PATCH 08/31] notes: make hash size independent brian m. carlson
2019-02-12 1:37 ` Eric Sunshine
2019-02-12 1:42 ` brian m. carlson
2019-02-12 1:22 ` [PATCH 09/31] notes: replace sha1_to_hex brian m. carlson
2019-02-12 1:22 ` [PATCH 10/31] object-store: rename and expand packed_git's sha1 member brian m. carlson
2019-02-12 3:32 ` Eric Sunshine
2019-02-14 3:33 ` brian m. carlson [this message]
2019-02-12 1:22 ` [PATCH 11/31] builtin/name-rev: make hash-size independent brian m. carlson
2019-02-12 1:22 ` [PATCH 12/31] fast-import: " brian m. carlson
2019-02-12 3:44 ` Eric Sunshine
2019-02-12 23:36 ` brian m. carlson
2019-02-12 1:22 ` [PATCH 13/31] fast-import: replace sha1_to_hex brian m. carlson
2019-02-12 1:22 ` [PATCH 14/31] builtin/am: make hash size independent brian m. carlson
2019-02-12 1:22 ` [PATCH 15/31] builtin/pull: make hash-size independent brian m. carlson
2019-02-12 3:47 ` Eric Sunshine
2019-02-12 1:22 ` [PATCH 16/31] http-push: convert to use the_hash_algo brian m. carlson
2019-02-12 1:22 ` [PATCH 17/31] http-backend: allow 64-character hex names brian m. carlson
2019-02-12 1:22 ` [PATCH 18/31] http-push: remove remaining uses of sha1_to_hex brian m. carlson
2019-02-12 1:22 ` [PATCH 19/31] http-walker: replace sha1_to_hex brian m. carlson
2019-02-12 3:51 ` Eric Sunshine
2019-02-12 1:22 ` [PATCH 20/31] http: replace hard-coded constant with the_hash_algo brian m. carlson
2019-02-12 1:22 ` [PATCH 21/31] http: compute hash of downloaded objects using the_hash_algo brian m. carlson
2019-02-12 1:22 ` [PATCH 22/31] http: replace sha1_to_hex brian m. carlson
2019-02-12 1:22 ` [PATCH 23/31] remote-curl: make hash size independent brian m. carlson
2019-02-12 11:11 ` Ævar Arnfjörð Bjarmason
2019-02-12 1:22 ` [PATCH 24/31] archive-tar: " brian m. carlson
2019-02-12 7:20 ` René Scharfe
2019-02-12 17:33 ` René Scharfe
2019-02-13 0:11 ` brian m. carlson
2019-02-12 1:22 ` [PATCH 25/31] archive: convert struct archiver_args to object_id brian m. carlson
2019-02-12 1:22 ` [PATCH 26/31] refspec: make hash size independent brian m. carlson
2019-02-12 1:22 ` [PATCH 27/31] builtin/difftool: use parse_oid_hex brian m. carlson
2019-02-12 8:27 ` Eric Sunshine
2019-02-12 1:22 ` [PATCH 28/31] dir: make untracked cache extension hash size independent brian m. carlson
2019-02-12 11:08 ` Ævar Arnfjörð Bjarmason
2019-02-13 0:30 ` brian m. carlson
2019-02-12 1:22 ` [PATCH 29/31] read-cache: read data in a hash-independent way brian m. carlson
2019-02-12 1:22 ` [PATCH 30/31] Git.pm: make hash size independent brian m. carlson
2019-02-12 10:59 ` Ævar Arnfjörð Bjarmason
2019-02-18 19:09 ` brian m. carlson
2019-02-18 21:00 ` Ævar Arnfjörð Bjarmason
2019-02-12 1:22 ` [PATCH 31/31] gitweb: " brian m. carlson
2019-02-12 10:57 ` Ævar Arnfjörð Bjarmason
2019-02-12 11:15 ` [PATCH 00/31] Hash function transition part 16 Ævar Arnfjörð Bjarmason
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