Re: [PATCH v2 1/8] sha1_file: allow to select pack origin when looking up an object

> diff --git a/cache.h b/cache.h
> index 94ca1ac..bed403a 100644
> --- a/cache.h
> +++ b/cache.h
> @@ -744,12 +744,33 @@ char *strip_path_suffix(const char *path, const char *suffix);
>  int daemon_avoid_alias(const char *path);
>  int offset_1st_component(const char *path);
>
> +/*
> + * odb origin bit mask:
> + * - 8 low bits are for requested objects
> + * - 8 high bits are for their base objects
> + */
> +#define ODB_LOCAL      1
> +#define ODB_ALT                2
> +#define ODB_CACHED     4
> +/*
> + * This flag is used to track if the origin selection is from
> + * "odb_default" below. Not a real source, not to be passed to any
> + * function cals explicitly.

> + */
> +#define ODB_DEFAULT    8
> +
> +extern unsigned int odb_default;
> +
>  /* object replacement */
>  #define READ_SHA1_FILE_REPLACE 1
> -extern void *read_sha1_file_extended(const unsigned char *sha1, enum object_type *type, unsigned long *size, unsigned flag);
> +extern void *read_sha1_file_extended(const unsigned char *sha1,
> +                                    unsigned int origin,
> +                                    enum object_type *type,
> +                                    unsigned long *size,
> +                                    unsigned flag);
>  static inline void *read_sha1_file(const unsigned char *sha1, enum object_type *type, unsigned long *size)
>  {
> -       return read_sha1_file_extended(sha1, type, size, READ_SHA1_FILE_REPLACE);
> +       return read_sha1_file_extended(sha1, odb_default, type, size, READ_SHA1_FILE_REPLACE);
>  }
>  extern const unsigned char *do_lookup_replace_object(const unsigned char *sha1);
>  static inline const unsigned char *lookup_replace_object(const unsigned char *sha1)