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[PATCH v2 4/7] pack-revindex: introduce GIT_TEST_REV_INDEX_DIE_ON_DISK

From
Taylor Blau <me@ttaylorr.com>
Date
Apr 12, 2023, 22:20 UTC
Message-ID
<8eec5bacd3a39d4d1586459f4a23422aff903139.1681338013.git.me@ttaylorr.com>
In-Reply-To
<cover.1681338013.git.me@ttaylorr.com>

In ec8e7760ac (pack-revindex: ensure that on-disk reverse indexes are given precedence, 2021-01-25), we introduced GIT_TEST_REV_INDEX_DIE_IN_MEMORY to abort the process when Git generated a reverse index from scratch.

ec8e7760ac was about ensuring that Git prefers a .rev file when available over generating the same information in memory from scratch.

In a subsequent patch, we'll introduce `pack.readReverseIndex`, which may be used to disable reading ".rev" files when available. In order to ensure that those files are indeed being ignored, introduce an analogous option to abort the process when Git reads a ".rev" file from disk.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
---
 pack-revindex.c | 3 +++
 pack-revindex.h | 1 +
 2 files changed, 4 insertions(+)
diff --git a/pack-revindex.c b/pack-revindex.c
index e3d69cc0f7a..44e1b3fed95 100644
--- a/pack-revindex.c
+++ b/pack-revindex.c
@@ -205,6 +205,9 @@ static int load_revindex_from_disk(char *revindex_name,
 	size_t revindex_size;
 	struct revindex_header *hdr;
 
+	if (git_env_bool(GIT_TEST_REV_INDEX_DIE_ON_DISK, 0))
+		die("dying as requested by '%s'", GIT_TEST_REV_INDEX_DIE_ON_DISK);
+
 	fd = git_open(revindex_name);
 
 	if (fd < 0) {
diff --git a/pack-revindex.h b/pack-revindex.h
index 3d1969ce8b9..ef8afee88b0 100644
--- a/pack-revindex.h
+++ b/pack-revindex.h
@@ -36,6 +36,7 @@
 
 #define GIT_TEST_WRITE_REV_INDEX "GIT_TEST_WRITE_REV_INDEX"
 #define GIT_TEST_REV_INDEX_DIE_IN_MEMORY "GIT_TEST_REV_INDEX_DIE_IN_MEMORY"
+#define GIT_TEST_REV_INDEX_DIE_ON_DISK "GIT_TEST_REV_INDEX_DIE_ON_DISK"
 
 struct packed_git;
 struct multi_pack_index;
-- 
2.40.0.323.gedff6a80c63
Previous: Taylor BlauNext: Taylor Blau
Message 25 of 29 in “pack-revindex: enable on-disk reverse indexes by default”
  1. 0/7 pack-revindex: enable on-disk reverse indexes by defaultTaylor Blau, Apr 10, 2023
  2. 1/7 pack-write.c: plug a leak in stage_tmp_packfiles()Taylor Blau, Apr 10, 2023
  3. Derrick StoleeApr 11, 2023
  4. Taylor BlauApr 11, 2023
  5. 2/7 t5325: mark as leak-freeTaylor Blau, Apr 10, 2023
  6. 3/7 pack-revindex: make `load_pack_revindex` take a repositoryTaylor Blau, Apr 10, 2023
  7. Derrick StoleeApr 11, 2023
  8. Taylor BlauApr 11, 2023
  9. Derrick StoleeApr 12, 2023
  10. 4/7 pack-revindex: introduce GIT_TEST_REV_INDEX_DIE_ON_DISKTaylor Blau, Apr 10, 2023
  11. 5/7 pack-revindex: introduce `pack.readReverseIndex`Taylor Blau, Apr 10, 2023
  12. 6/7 config: enable `pack.writeReverseIndex` by defaultTaylor Blau, Apr 10, 2023
  13. Junio C HamanoApr 13, 2023
  14. 7/7 t: invert `GIT_TEST_WRITE_REV_INDEX`Taylor Blau, Apr 10, 2023
  15. Derrick StoleeApr 11, 2023
  16. Taylor BlauApr 11, 2023
  17. Derrick StoleeApr 12, 2023
  18. Derrick StoleeApr 11, 2023
  19. Taylor BlauApr 11, 2023
  20. Derrick StoleeApr 12, 2023
  21. 0/7 pack-revindex: enable on-disk reverse indexes by defaultTaylor Blau, Apr 12, 2023
  22. 1/7 pack-write.c: plug a leak in stage_tmp_packfiles()Taylor Blau, Apr 12, 2023
  23. 2/7 t5325: mark as leak-freeTaylor Blau, Apr 12, 2023
  24. 3/7 pack-revindex: make `load_pack_revindex` take a repositoryTaylor Blau, Apr 12, 2023
  25. 4/7 pack-revindex: introduce GIT_TEST_REV_INDEX_DIE_ON_DISKTaylor Blau, Apr 12, 2023
  26. 5/7 pack-revindex: introduce `pack.readReverseIndex`Taylor Blau, Apr 12, 2023
  27. 7/7 t: invert `GIT_TEST_WRITE_REV_INDEX`Taylor Blau, Apr 12, 2023
  28. 6/7 config: enable `pack.writeReverseIndex` by defaultTaylor Blau, Apr 12, 2023
  29. Derrick StoleeApr 13, 2023

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