fast-import: use write_idx_file() instead of custom code

This allows for the creation of pack index version 2 with its object
CRC and the possibility for a pack to be larger than 4 GB.

Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/fast-import.c b/fast-import.c
index 7d737ba63ed6bf434466fe695990121af15736b6..9d7ab09620b81ce2937fc38dbf7324956835c6f8 100644 (file)
--- a/fast-import.c
+++ b/fast-import.c
@@ -854,67 +854,30 @@ static void start_packfile(void)
        all_packs[pack_id] = p;
 }
 
-static int oecmp (const void *a_, const void *b_)
+static const char *create_index(void)
 {
-       struct object_entry *a = *((struct object_entry**)a_);
-       struct object_entry *b = *((struct object_entry**)b_);
-       return hashcmp(a->idx.sha1, b->idx.sha1);
-}
-
-static char *create_index(void)
-{
-       static char tmpfile[PATH_MAX];
-       git_SHA_CTX ctx;
-       struct sha1file *f;
-       struct object_entry **idx, **c, **last, *e;
+       const char *tmpfile;
+       struct pack_idx_entry **idx, **c, **last;
+       struct object_entry *e;
        struct object_entry_pool *o;
-       uint32_t array[256];
-       int i, idx_fd;
 
-       /* Build the sorted table of object IDs. */
-       idx = xmalloc(object_count * sizeof(struct object_entry*));
+       /* Build the table of object IDs. */
+       idx = xmalloc(object_count * sizeof(*idx));
        c = idx;
        for (o = blocks; o; o = o->next_pool)
                for (e = o->next_free; e-- != o->entries;)
                        if (pack_id == e->pack_id)
-                               *c++ = e;
+                               *c++ = &e->idx;
        last = idx + object_count;
        if (c != last)
                die("internal consistency error creating the index");
-       qsort(idx, object_count, sizeof(struct object_entry*), oecmp);
 
-       /* Generate the fan-out array. */
-       c = idx;
-       for (i = 0; i < 256; i++) {
-               struct object_entry **next = c;
-               while (next < last) {
-                       if ((*next)->idx.sha1[0] != i)
-                               break;
-                       next++;
-               }
-               array[i] = htonl(next - idx);
-               c = next;
-       }
-
-       idx_fd = odb_mkstemp(tmpfile, sizeof(tmpfile),
-                            "pack/tmp_idx_XXXXXX");
-       f = sha1fd(idx_fd, tmpfile);
-       sha1write(f, array, 256 * sizeof(int));
-       git_SHA1_Init(&ctx);
-       for (c = idx; c != last; c++) {
-               uint32_t offset = htonl((*c)->idx.offset);
-               sha1write(f, &offset, 4);
-               sha1write(f, (*c)->idx.sha1, sizeof((*c)->idx.sha1));
-               git_SHA1_Update(&ctx, (*c)->idx.sha1, 20);
-       }
-       sha1write(f, pack_data->sha1, sizeof(pack_data->sha1));
-       sha1close(f, NULL, CSUM_FSYNC);
+       tmpfile = write_idx_file(NULL, idx, object_count, pack_data->sha1);
        free(idx);
-       git_SHA1_Final(pack_data->sha1, &ctx);
        return tmpfile;
 }
 
-static char *keep_pack(char *curr_index_name)
+static char *keep_pack(const char *curr_index_name)
 {
        static char name[PATH_MAX];
        static const char *keep_msg = "fast-import";
@@ -936,6 +899,7 @@ static char *keep_pack(char *curr_index_name)
                 get_object_directory(), sha1_to_hex(pack_data->sha1));
        if (move_temp_to_file(curr_index_name, name))
                die("cannot store index file");
+       free((void *)curr_index_name);
        return name;
 }
 
@@ -1134,6 +1098,8 @@ static int store_object(
        object_count++;
        object_count_by_type[type]++;
 
+       crc32_begin(pack_file);
+
        if (delta) {
                unsigned long ofs = e->idx.offset - last->offset;
                unsigned pos = sizeof(hdr) - 1;
@@ -1160,6 +1126,8 @@ static int store_object(
        sha1write(pack_file, out, s.total_out);
        pack_size += s.total_out;
 
+       e->idx.crc32 = crc32_end(pack_file);
+
        free(out);
        free(delta);
        if (last) {
@@ -1219,6 +1187,8 @@ static void stream_blob(uintmax_t len, unsigned char *sha1out, uintmax_t mark)
        git_SHA1_Init(&c);
        git_SHA1_Update(&c, out_buf, hdrlen);
 
+       crc32_begin(pack_file);
+
        memset(&s, 0, sizeof(s));
        deflateInit(&s, pack_compression_level);
 
@@ -1288,6 +1258,7 @@ static void stream_blob(uintmax_t len, unsigned char *sha1out, uintmax_t mark)
                e->type = OBJ_BLOB;
                e->pack_id = pack_id;
                e->idx.offset = offset;
+               e->idx.crc32 = crc32_end(pack_file);
                object_count++;
                object_count_by_type[OBJ_BLOB]++;
        }