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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_client_cli.c
+116
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@@ -2431,6 +2431,119 @@ static void test_parse_args_rejects_invalid_compression_choice() {
config_delete(cfg);
}
/* rsync gives each codec its own default --compress-level; an omitted level
* resolves to that default and an explicit one is clamped to the codec range. */
static void test_parse_args_per_codec_compression_level_defaults() {
unsetenv("RSYNC_COMPRESS_LIST");
struct {
const char* choice;
int level;
} cases[] = {
{"zstd", 3},
{"zlib", 6},
{"zlibx", 6},
{"lz4", 1},
};
for (size_t i = 0; i < sizeof(cases) / sizeof(cases[0]); i++) {
Config* cfg = config_create();
char* argv[] = {"fastsync", "-z", "--compress-choice", (char*)cases[i].choice, "/src", "/dst"};
int positional_args[2];
int positional_count = 0;
EXPECT_EQ_INT(parse_args(cfg, 6, argv, positional_args, &positional_count), 0);
EXPECT_TRUE(cfg->use_compression);
EXPECT_EQ_INT(cfg->compression_level, cases[i].level);
config_delete(cfg);
}
/* Bare -z resolves to the zstd default. */
Config* cfg = config_create();
char* bare[] = {"fastsync", "-z", "/src", "/dst"};
int positional_args[2];
int positional_count = 0;
EXPECT_EQ_INT(parse_args(cfg, 4, bare, positional_args, &positional_count), 0);
EXPECT_EQ_INT(cfg->compression_level, 3);
config_delete(cfg);
/* An explicit level wins unchanged for zstd... */
cfg = config_create();
char* zv[] = {"fastsync", "-z", "--compress-level", "10", "/src", "/dst"};
positional_count = 0;
EXPECT_EQ_INT(parse_args(cfg, 5, zv, positional_args, &positional_count), 0);
EXPECT_EQ_INT(cfg->compression_level, 10);
config_delete(cfg);
/* ...but zlib clamps an over-range level to 9 like rsync. */
cfg = config_create();
char* zc[] = {"fastsync", "-z", "--compress-choice", "zlib", "--compress-level", "15",
"/src", "/dst"};
positional_count = 0;
EXPECT_EQ_INT(parse_args(cfg, 8, zc, positional_args, &positional_count), 0);
EXPECT_EQ_INT(cfg->compression_level, 9);
config_delete(cfg);
}
/* RSYNC_COMPRESS_LIST drives the bare -z ("auto") resolution. */
static void test_parse_args_compression_env_list() {
Config* cfg = config_create();
char* argv[] = {"fastsync", "-z", "/src", "/dst"};
int positional_args[2];
int positional_count = 0;
setenv("RSYNC_COMPRESS_LIST", "zlib lz4", 1);
EXPECT_EQ_INT(parse_args(cfg, 4, argv, positional_args, &positional_count), 0);
EXPECT_EQ_INT(cfg->compression_algo, (int)COMPRESSION_ALGO_ZLIB);
EXPECT_EQ_INT(cfg->compression_level, 6);
config_delete(cfg);
/* An explicit --compress-choice beats the env list. */
cfg = config_create();
char* explicit_argv[] = {"fastsync", "-z", "--compress-choice", "zstd", "/src", "/dst"};
positional_count = 0;
EXPECT_EQ_INT(parse_args(cfg, 6, explicit_argv, positional_args, &positional_count), 0);
EXPECT_EQ_INT(cfg->compression_algo, (int)COMPRESSION_ALGO_ZSTD);
config_delete(cfg);
/* A list with no supported name is rsync's failed negotiation (exit 4). */
setenv("RSYNC_COMPRESS_LIST", "bogus", 1);
cfg = config_create();
positional_count = 0;
EXPECT_EQ_INT(parse_args(cfg, 4, argv, positional_args, &positional_count), -1);
EXPECT_EQ_INT(cfg->cli_exit_code, 4);
config_delete(cfg);
unsetenv("RSYNC_COMPRESS_LIST");
}
/* RSYNC_CHECKSUM_LIST drives the default checksum choice. */
static void test_parse_args_checksum_env_list() {
Config* cfg = config_create();
char* argv[] = {"fastsync", "--checksum", "/src", "/dst"};
int positional_args[2];
int positional_count = 0;
setenv("RSYNC_CHECKSUM_LIST", "md5", 1);
EXPECT_EQ_INT(parse_args(cfg, 4, argv, positional_args, &positional_count), 0);
EXPECT_EQ_INT(cfg->checksum_algo, (int)CHECKSUM_ALGO_MD5);
EXPECT_EQ_INT(cfg->checksum_transfer_algo, (int)CHECKSUM_ALGO_MD5);
config_delete(cfg);
/* An explicit --cc wins. */
cfg = config_create();
char* cc_argv[] = {"fastsync", "--checksum", "--cc=sha1", "/src", "/dst"};
positional_count = 0;
EXPECT_EQ_INT(parse_args(cfg, 5, cc_argv, positional_args, &positional_count), 0);
EXPECT_EQ_INT(cfg->checksum_algo, (int)CHECKSUM_ALGO_SHA1);
config_delete(cfg);
/* A list with no supported name is rsync's failed negotiation (exit 4). */
setenv("RSYNC_CHECKSUM_LIST", "bogus", 1);
cfg = config_create();
positional_count = 0;
EXPECT_EQ_INT(parse_args(cfg, 4, argv, positional_args, &positional_count), -1);
EXPECT_EQ_INT(cfg->cli_exit_code, 4);
config_delete(cfg);
unsetenv("RSYNC_CHECKSUM_LIST");
}
/* Every value-taking table option accepts an inline "--opt=value" form. */
static void test_parse_args_table_equals_size_options() {
Config* cfg = config_create();
@@ -4682,6 +4795,9 @@ void test_client_cli() {
test_parse_args_compression_alias_equals();
test_parse_args_rejects_invalid_compression_level_equals();
test_parse_args_rejects_invalid_compression_choice();
test_parse_args_per_codec_compression_level_defaults();
test_parse_args_compression_env_list();
test_parse_args_checksum_env_list();
test_parse_args_table_equals_size_options();
test_parse_args_table_equals_string_and_int_options();
test_parse_args_missing_argument_diagnostic();