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feat(codecs): per-codec level defaults, RSYNC_*_LIST auto, zlibx reclassify

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- rsync 3.4.1 per-codec defaults (zstd 3, zlib/zlibx 6, lz4 level ignored)
  and per-codec clamping; explicit --zl still wins
- auto resolves via whitespace-separated RSYNC_COMPRESS_LIST /
  RSYNC_CHECKSUM_LIST (first supported wins; all-unknown exits 4)
- zlibx reclassified: FastSync's zlib stream already excludes matched data,
  so its tree/stdout/exit match zlib
- --compress/-z and --compress-choice flip to parity (113/12/32)
This commit is contained in:
TapTap
2026-09-19 13:14:48 +02:00
parent c80098623f
commit eff9852038
17 changed files with 686 additions and 25 deletions
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tests/test_checksum.c
+23
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@@ -265,6 +265,28 @@ static void test_checksum_digest_file_matches_oneshot(void) {
free(data);
}
/* RSYNC_CHECKSUM_LIST precedence, syntax and fallback. */
static void test_checksum_choice_env_list() {
unsetenv("RSYNC_CHECKSUM_LIST");
EXPECT_EQ_INT(checksum_choice_resolve(), (int)CHECKSUM_ALGO_XXH128);
EXPECT_EQ_INT((int)checksum_negotiate_default(), (int)CHECKSUM_ALGO_XXH128);
setenv("RSYNC_CHECKSUM_LIST", "bogus md5 xxh3", 1);
EXPECT_EQ_INT(checksum_choice_resolve(), (int)CHECKSUM_ALGO_MD5);
setenv("RSYNC_CHECKSUM_LIST", "SHA1", 1);
EXPECT_EQ_INT(checksum_choice_resolve(), (int)CHECKSUM_ALGO_SHA1);
/* Whitespace-separated only: comma is not a separator in rsync's syntax. */
setenv("RSYNC_CHECKSUM_LIST", "md5,xxh3", 1);
EXPECT_EQ_INT(checksum_choice_resolve(), -1);
setenv("RSYNC_CHECKSUM_LIST", " ", 1);
EXPECT_EQ_INT(checksum_choice_resolve(), (int)CHECKSUM_ALGO_XXH128);
unsetenv("RSYNC_CHECKSUM_LIST");
}
void test_checksum(void) {
test_checksum_xxh64_seed0();
test_checksum_xxh64_empty();
@@ -281,4 +303,5 @@ void test_checksum(void) {
test_checksum_truncated_buffer_rejected();
test_checksum_null_empty_digest();
test_checksum_digest_file_matches_oneshot();
test_checksum_choice_env_list();
}