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From: Derrick Stolee <stolee@gmail.com>
To: Taylor Blau <me@ttaylorr.com>,
	Derrick Stolee via GitGitGadget <gitgitgadget@gmail.com>
Cc: git@vger.kernel.org, szeder.dev@gmail.com,
	Derrick Stolee <derrickstolee@github.com>,
	Derrick Stolee <dstolee@microsoft.com>
Subject: Re: [PATCH 10/15] midx: use chunk-format API in write_midx_internal()
Date: Thu, 10 Dec 2020 09:36:57 -0500	[thread overview]
Message-ID: <47900592-2c97-cff1-c70f-594691a8083f@gmail.com> (raw)
In-Reply-To: <X8/I/RzXZksio+ri@nand.local>

On 12/8/2020 1:42 PM, Taylor Blau wrote:
> I wonder what it would look like if we introduced a new 'struct
> chunkfile' type. It would know about the underlying hashfile that it's
> writing to, as well as the chunks it's supposed to write. It would
> likely support three operations: add a new chunk, write the TOC, and
> write the contents (the latter two could probably be combined into one).
> 
> Below is a patch to do just that. It seems to work OK on t5319, but
> fails some tests in t5318. I haven't looked into the commit-graph test
> failures, but I'd be happy to do so if you think this is a direction
> worth going in.

I like this direction. It makes it easier to adapt future formats or
add new chunks. I wonder how this write interface can adapt to the
reading portion, since that is where some of the magic numbers came
about. Likely there is an equivalent that we could do to have the
chunk-format API construct the "struct chunkfile" and then the
commit-graph and multi-pack-index parsers can interpret the chunks
_after_ the TOC parse is complete.

As discussed, I'm putting this series on hold for a while so
generation number v2 is not interrupted. When I come back to it,
I'll incorporate these design ideas and build on top of that
topic.

Thanks,
-Stolee

  reply	other threads:[~2020-12-10 16:49 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-03 16:16 [PATCH 00/15] Refactor chunk-format into an API Derrick Stolee via GitGitGadget
2020-12-03 16:16 ` [PATCH 01/15] commit-graph: anonymize data in chunk_write_fn Derrick Stolee via GitGitGadget
2020-12-03 16:16 ` [PATCH 02/15] chunk-format: add API for writing table of contents Derrick Stolee via GitGitGadget
2020-12-08 17:56   ` Taylor Blau
2020-12-03 16:16 ` [PATCH 03/15] midx: rename pack_info to write_midx_context Derrick Stolee via GitGitGadget
2020-12-03 16:16 ` [PATCH 04/15] midx: use context in write_midx_pack_names() Derrick Stolee via GitGitGadget
2020-12-03 16:16 ` [PATCH 05/15] midx: add entries to write_midx_context Derrick Stolee via GitGitGadget
2020-12-03 21:42   ` Junio C Hamano
2020-12-04 13:39     ` Derrick Stolee
2020-12-08 18:00   ` Taylor Blau
2020-12-03 16:16 ` [PATCH 06/15] midx: add pack_perm " Derrick Stolee via GitGitGadget
2020-12-03 16:16 ` [PATCH 07/15] midx: add num_large_offsets " Derrick Stolee via GitGitGadget
2020-12-03 16:16 ` [PATCH 08/15] midx: convert chunk write methods to return int Derrick Stolee via GitGitGadget
2020-12-03 21:50   ` Junio C Hamano
2020-12-04 13:40     ` Derrick Stolee
2020-12-03 16:16 ` [PATCH 09/15] midx: drop chunk progress during write Derrick Stolee via GitGitGadget
2020-12-03 16:16 ` [PATCH 10/15] midx: use chunk-format API in write_midx_internal() Derrick Stolee via GitGitGadget
2020-12-08 18:42   ` Taylor Blau
2020-12-10 14:36     ` Derrick Stolee [this message]
2020-12-03 16:16 ` [PATCH 11/15] midx: use 64-bit multiplication for chunk sizes Derrick Stolee via GitGitGadget
2020-12-03 22:00   ` Junio C Hamano
2020-12-08 18:43     ` Taylor Blau
2020-12-03 16:16 ` [PATCH 12/15] chunk-format: create write_chunks() Derrick Stolee via GitGitGadget
2020-12-08 18:45   ` Taylor Blau
2020-12-03 16:16 ` [PATCH 13/15] chunk-format: create chunk reading API Derrick Stolee via GitGitGadget
2020-12-03 22:17   ` Junio C Hamano
2020-12-04 13:47     ` Derrick Stolee
2020-12-04 20:17       ` Junio C Hamano
2020-12-03 22:43   ` Junio C Hamano
2020-12-04 13:45     ` Derrick Stolee
2020-12-03 16:16 ` [PATCH 14/15] commit-graph: restore duplicate chunk checks Derrick Stolee via GitGitGadget
2020-12-07 13:43   ` Derrick Stolee
2020-12-03 16:16 ` [PATCH 15/15] chunk-format: add technical docs Derrick Stolee via GitGitGadget
2020-12-04 12:48 ` [PATCH 00/15] Refactor chunk-format into an API René Scharfe
2020-12-04 13:57   ` Derrick Stolee
2020-12-04 19:42   ` Junio C Hamano
2020-12-08 18:49   ` Taylor Blau
2020-12-09 17:13     ` René Scharfe
2020-12-10  0:50       ` Taylor Blau
2020-12-10 14:30         ` Derrick Stolee

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