[PATCH v2 0/8] reftable: fixes and optimizations (pt.2)

Hi,

this is the second version of my patch series that contains additional fixes and optimizations for the reftable library. Changes compared to v1:

  - Added a patch to not auto-compact twice in `reftable_stack_add()`,
    reported by Han-Wen.

  - Fixed an issue I've previously introduced while rebasing the patch
    series.

  - Fixed a missing header, as reported by Junio.

Due to the added patch that avoids double auto-compaction this patch series now depends on 637e34a783 (Merge branch 'ps/reftable-fixes', 2023-12-27).

Patrick

Patrick Steinhardt (8):
  reftable/stack: do not overwrite errors when compacting
  reftable/stack: do not auto-compact twice in `reftable_stack_add()`
  reftable/writer: fix index corruption when writing multiple indices
  reftable/record: constify some parts of the interface
  reftable/record: store "val1" hashes as static arrays
  reftable/record: store "val2" hashes as static arrays
  reftable/merged: really reuse buffers to compute record keys
  reftable/merged: transfer ownership of records when iterating

 reftable/block_test.c      |   4 +-
 reftable/merged.c          |   8 +--
 reftable/merged_test.c     |  16 +++---
 reftable/readwrite_test.c  | 102 +++++++++++++++++++++++++++++++------
 reftable/record.c          |  17 ++-----
 reftable/record_test.c     |   5 --
 reftable/reftable-record.h |  11 ++--
 reftable/stack.c           |  23 +++------
 reftable/stack_test.c      |   2 -
 reftable/writer.c          |   4 +-
 10 files changed, 117 insertions(+), 75 deletions(-)

Range-diff against v1:
1:  573fb2c4fb = 1:  22a57020c6 reftable/stack: do not overwrite errors when compacting
-:  ---------- > 2:  a08f7efc99 reftable/stack: do not auto-compact twice in `reftable_stack_add()`
2:  86ee79c48d = 3:  c00e08d97f reftable/writer: fix index corruption when writing multiple indices
3:  3ad4a0e5b9 = 4:  3416268087 reftable/record: constify some parts of the interface
4:  06c9eab678 ! 5:  46ca3a37f8 reftable/record: store "val1" hashes as static arrays
    @@ reftable/readwrite_test.c: static void test_write_object_id_length(void)
      	};
      	int err;
      	int i;
    +@@ reftable/readwrite_test.c: static void test_write_multiple_indices(void)
    + 	writer = reftable_new_writer(&strbuf_add_void, &writer_buf, &opts);
    + 	reftable_writer_set_limits(writer, 1, 1);
    + 	for (i = 0; i < 100; i++) {
    +-		unsigned char hash[GIT_SHA1_RAWSZ] = {i};
    + 		struct reftable_ref_record ref = {
    + 			.update_index = 1,
    + 			.value_type = REFTABLE_REF_VAL1,
    +-			.value.val1 = hash,
    ++			.value.val1 = {i},
    + 		};
    + 
    + 		strbuf_reset(&buf);
     
      ## reftable/record.c ##
     @@ reftable/record.c: static void reftable_ref_record_copy_from(void *rec, const void *src_rec,
    @@ reftable/record_test.c: static void test_reftable_ref_record_roundtrip(void)
      		case REFTABLE_REF_VAL2:
     
      ## reftable/reftable-record.h ##
    +@@ reftable/reftable-record.h: license that can be found in the LICENSE file or at
    + #ifndef REFTABLE_RECORD_H
    + #define REFTABLE_RECORD_H
    + 
    ++#include "hash-ll.h"
    + #include <stdint.h>
    + 
    + /*
     @@ reftable/reftable-record.h: struct reftable_ref_record {
      #define REFTABLE_NR_REF_VALUETYPES 4
      	} value_type;
5:  49f13c123f = 6:  c8a36917b1 reftable/record: store "val2" hashes as static arrays
6:  32b7ddee28 = 7:  6313f8affd reftable/merged: really reuse buffers to compute record keys
7:  3dbabea22a = 8:  25a3919e58 reftable/merged: transfer ownership of records when iterating