Subject: Re: [PATCH v3 05/17] pack-mtimes: support writing pack .mtimes files

From: Ævar Arnfjörð Bjarmason <[email-masked]>
Date: Thu, 03 Mar 2022 17:45:23 +0100

On Wed, Mar 02 2022, Taylor Blau wrote:

> Now that the `.mtimes` format is defined, supplement the pack-write API
> to be able to conditionally write an `.mtimes` file along with a pack by
> setting an additional flag and passing an oidmap that contains the
> timestamps corresponding to each object in the pack.
> [...]
>  void write_promisor_file(const char *promisor_name, struct ref **sought, int nr_sought)
> diff --git a/pack.h b/pack.h
> index fd27cfdfd7..01d385903a 100644
> --- a/pack.h
> +++ b/pack.h
> @@ -44,6 +44,7 @@ struct pack_idx_option {
>  #define WRITE_IDX_STRICT 02
>  #define WRITE_REV 04
>  #define WRITE_REV_VERIFY 010
> +#define WRITE_MTIMES 020
>  
>  	uint32_t version;
>  	uint32_t off32_limit;

Why the hardcoding? The 010 was added in your 8ef50d9958f (pack-write.c:
prepare to write 'pack-*.rev' files, 2021-01-25). That would be the same
as 8|2, but there's no 8 there., ditto this new 020 that's the same as
1<<4 | 1<<2, but there's no "16", just WRITE_REV=4.