feat: add whole-file transfer mode

src/client/client_cli.c

@@ -140,6 +140,7 @@ static const OptionEntry OPTION_TABLE[] = {
     {"--delete", NULL, OPT_FLAG, offsetof(Config, use_delete)},
     {"--incremental", NULL, OPT_FLAG, offsetof(Config, use_incremental)},
     {"--delta", NULL, OPT_FLAG, offsetof(Config, use_delta)},
+    {"--whole-file", "-W", OPT_FLAG, offsetof(Config, whole_file)},
     {"--save-to-disk", NULL, OPT_FLAG, offsetof(Config, save_to_disk)},
     {"--progress", NULL, OPT_FLAG, offsetof(Config, show_progress)},
     {"--tls", NULL, OPT_FLAG, offsetof(Config, use_tls)},

src/client/client_send.c

@@ -321,7 +321,7 @@ static int send_single_file(Client* client, File* file, Config* config, bool use
     delta_signature_destroy(sig);
     return 1;
   }
-  if (rc == 2 && config->use_delta) {
+  if (rc == 2 && config->use_delta && !config->whole_file) {
     int drc = send_delta(client, file, sig, config);
     delta_signature_destroy(sig);
     if (drc == 0)

src/client/usage.c

@@ -29,6 +29,7 @@ void print_usage(void) {
   printf("  --min-size <n>      Skip files smaller than n bytes\n");
   printf("  --incremental       Skip files unchanged since last transfer\n");
   printf("  --delta             Delta transfer for changed files (requires --incremental)\n");
+  printf("  -W, --whole-file    Transfer changed files without delta processing\n");
   printf("  --delta-block <n>   Delta block size in bytes (default: %d)\n",
          DELTA_BLOCK_SIZE_DEFAULT);
   printf("  --delta-max <n>     Max file size for delta transfer (default: %llu)\n",

src/shared/config.c

@@ -35,6 +35,7 @@ static void config_set_defaults(Config* config) {
   config->min_size = 0;
   config->use_incremental = false;
   config->use_delta = false;
+  config->whole_file = false;
   config->delta_block_size = DELTA_BLOCK_SIZE_DEFAULT;
   config->delta_max_file_size = DELTA_MAX_FILE_SIZE;
   config->use_tls = false;
@@ -228,7 +229,7 @@ static bool send_core_fields(int fd, const Config* c) {
 
 static bool send_delta_fields(int fd, const Config* c) {
   return send_int(fd, c->use_delete) && send_int(fd, c->use_incremental) &&
-         send_int(fd, c->use_delta) &&
+         send_int(fd, c->use_delta && !c->whole_file) &&
          send_n_data(fd, &c->delta_block_size, sizeof(c->delta_block_size)) &&
          send_n_data(fd, &c->delta_max_file_size, sizeof(unsigned long long));
 }

src/shared/config.h

@@ -35,6 +35,7 @@ typedef struct Config {
   unsigned long long min_size;
   bool use_incremental;
   bool use_delta;
+  bool whole_file;
   uint32_t delta_block_size;
   unsigned long long delta_max_file_size;
   bool use_tls;

src/shared/file_receive.c

@@ -400,7 +400,7 @@ File* receive_incremental_check(int fd, const Config* config, bool* skipped) {
     return NULL;
   }
 
-  bool try_delta = config->use_delta && has_old_file && old_data != NULL &&
+  bool try_delta = config->use_delta && !config->whole_file && has_old_file && old_data != NULL &&
                    delta_should_attempt(old_size, check_size, config->delta_max_file_size);
 
   if (try_delta) {