Remove unnecessary options from fast-import.

The --objects command line option is rather unnecessary.  Internally
we allocate objects in 5000 unit blocks, ensuring that any sort
of malloc overhead is ammortized over the individual objects to
almost nothing.  Since most frontends don't know how many objects
they will need for a given import run (and its hard for them to
predict without just doing the run) we probably won't see anyone
using --objects.  Further since there's really no major benefit
to using the option, most frontends won't even bother supplying
it even if they could estimate the number of objects.  So I'm
removing it.

The --max-objects-per-pack option was probably a mistake to even
have added in the first place.  The packfile format is limited
to 4 GiB today; given that objects need at least 3 bytes of data
(and probably need even more) there's no way we are going to exceed
the limit of 1<<32-1 objects before we reach the file size limit.
So I'm removing it (to slightly reduce the complexity of the code)
before anyone gets any wise ideas and tries to use it.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

diff --git a/fast-import.c b/fast-import.c
index 7f519b4de33874e6efcedc251d9e5493a887b1bd..9a642f2e02e4a695b0aa37c660e965362e68f297 100644 (file)
--- a/fast-import.c
+++ b/fast-import.c
@@ -224,7 +224,6 @@ struct hash_list
 /* Configured limits on output */
 static unsigned long max_depth = 10;
 static unsigned long max_packsize = (1LL << 32) - 1;
-static uintmax_t max_objects = -1;
 
 /* Stats and misc. counters */
 static uintmax_t alloc_count;
@@ -900,9 +899,7 @@ static int store_object(
        deflateEnd(&s);
 
        /* Determine if we should auto-checkpoint. */
-       if ((object_count + 1) > max_objects
-               || (object_count + 1) < object_count
-               || (pack_size + 60 + s.total_out) > max_packsize
+       if ((pack_size + 60 + s.total_out) > max_packsize
                || (pack_size + 60 + s.total_out) < pack_size) {
 
                /* This new object needs to *not* have the current pack_id. */
@@ -1872,12 +1869,11 @@ static void cmd_checkpoint(void)
 }
 
 static const char fast_import_usage[] =
-"git-fast-import [--objects=n] [--depth=n] [--active-branches=n] [--export-marks=marks.file] [--branch-log=log]";
+"git-fast-import [--depth=n] [--active-branches=n] [--export-marks=marks.file] [--branch-log=log]";
 
 int main(int argc, const char **argv)
 {
        int i;
-       uintmax_t est_obj_cnt = object_entry_alloc;
        uintmax_t total_count, duplicate_count;
 
        setup_ident();
@@ -1888,10 +1884,6 @@ int main(int argc, const char **argv)
 
                if (*a != '-' || !strcmp(a, "--"))
                        break;
-               else if (!strncmp(a, "--objects=", 10))
-                       est_obj_cnt = strtoumax(a + 10, NULL, 0);
-               else if (!strncmp(a, "--max-objects-per-pack=", 23))
-                       max_objects = strtoumax(a + 23, NULL, 0);
                else if (!strncmp(a, "--max-pack-size=", 16))
                        max_packsize = strtoumax(a + 16, NULL, 0) * 1024 * 1024;
                else if (!strncmp(a, "--depth=", 8))
@@ -1911,7 +1903,7 @@ int main(int argc, const char **argv)
        if (i != argc)
                usage(fast_import_usage);
 
-       alloc_objects(est_obj_cnt);
+       alloc_objects(object_entry_alloc);
        strbuf_init(&command_buf);
 
        atom_table = xcalloc(atom_table_sz, sizeof(struct atom_str*));
@@ -1955,7 +1947,7 @@ int main(int argc, const char **argv)
 
        fprintf(stderr, "%s statistics:\n", argv[0]);
        fprintf(stderr, "---------------------------------------------------------------------\n");
-       fprintf(stderr, "Alloc'd objects: %10ju (%10ju overflow  )\n", alloc_count, alloc_count - est_obj_cnt);
+       fprintf(stderr, "Alloc'd objects: %10ju\n", alloc_count);
        fprintf(stderr, "Total objects:   %10ju (%10ju duplicates                  )\n", total_count, duplicate_count);
        fprintf(stderr, "      blobs  :   %10ju (%10ju duplicates %10ju deltas)\n", object_count_by_type[OBJ_BLOB], duplicate_count_by_type[OBJ_BLOB], delta_count_by_type[OBJ_BLOB]);
        fprintf(stderr, "      trees  :   %10ju (%10ju duplicates %10ju deltas)\n", object_count_by_type[OBJ_TREE], duplicate_count_by_type[OBJ_TREE], delta_count_by_type[OBJ_TREE]);