make "index-pack" a built-in

This required some fairly trivial packfile function 'const' cleanup,
since the builtin commands get a const char *argv[] array.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 0 insertions, 1047 deletions

diff --git a/index-pack.c b/index-pack.c
deleted file mode 100644
index 190f372dd..000000000
--- a/index-pack.c
+++ /dev/null
@@ -1,1047 +0,0 @@
-#include "cache.h"
-#include "delta.h"
-#include "pack.h"
-#include "csum-file.h"
-#include "blob.h"
-#include "commit.h"
-#include "tag.h"
-#include "tree.h"
-#include "progress.h"
-#include "fsck.h"
-#include "exec_cmd.h"
-
-static const char index_pack_usage[] =
-"git index-pack [-v] [-o <index-file>] [{ ---keep | --keep=<msg> }] [--strict] { <pack-file> | --stdin [--fix-thin] [<pack-file>] }";
-
-struct object_entry
-{
-	struct pack_idx_entry idx;
-	unsigned long size;
-	unsigned int hdr_size;
-	enum object_type type;
-	enum object_type real_type;
-};
-
-union delta_base {
-	unsigned char sha1[20];
-	off_t offset;
-};
-
-struct base_data {
-	struct base_data *base;
-	struct base_data *child;
-	struct object_entry *obj;
-	void *data;
-	unsigned long size;
-};
-
-/*
- * Even if sizeof(union delta_base) == 24 on 64-bit archs, we really want
- * to memcmp() only the first 20 bytes.
- */
-#define UNION_BASE_SZ	20
-
-#define FLAG_LINK (1u<<20)
-#define FLAG_CHECKED (1u<<21)
-
-struct delta_entry
-{
-	union delta_base base;
-	int obj_no;
-};
-
-static struct object_entry *objects;
-static struct delta_entry *deltas;
-static struct base_data *base_cache;
-static size_t base_cache_used;
-static int nr_objects;
-static int nr_deltas;
-static int nr_resolved_deltas;
-
-static int from_stdin;
-static int strict;
-static int verbose;
-
-static struct progress *progress;
-
-/* We always read in 4kB chunks. */
-static unsigned char input_buffer[4096];
-static unsigned int input_offset, input_len;
-static off_t consumed_bytes;
-static git_SHA_CTX input_ctx;
-static uint32_t input_crc32;
-static int input_fd, output_fd, pack_fd;
-
-static int mark_link(struct object *obj, int type, void *data)
-{
-	if (!obj)
-		return -1;
-
-	if (type != OBJ_ANY && obj->type != type)
-		die("object type mismatch at %s", sha1_to_hex(obj->sha1));
-
-	obj->flags |= FLAG_LINK;
-	return 0;
-}
-
-/* The content of each linked object must have been checked
-   or it must be already present in the object database */
-static void check_object(struct object *obj)
-{
-	if (!obj)
-		return;
-
-	if (!(obj->flags & FLAG_LINK))
-		return;
-
-	if (!(obj->flags & FLAG_CHECKED)) {
-		unsigned long size;
-		int type = sha1_object_info(obj->sha1, &size);
-		if (type != obj->type || type <= 0)
-			die("object of unexpected type");
-		obj->flags |= FLAG_CHECKED;
-		return;
-	}
-}
-
-static void check_objects(void)
-{
-	unsigned i, max;
-
-	max = get_max_object_index();
-	for (i = 0; i < max; i++)
-		check_object(get_indexed_object(i));
-}
-
-
-/* Discard current buffer used content. */
-static void flush(void)
-{
-	if (input_offset) {
-		if (output_fd >= 0)
-			write_or_die(output_fd, input_buffer, input_offset);
-		git_SHA1_Update(&input_ctx, input_buffer, input_offset);
-		memmove(input_buffer, input_buffer + input_offset, input_len);
-		input_offset = 0;
-	}
-}
-
-/*
- * Make sure at least "min" bytes are available in the buffer, and
- * return the pointer to the buffer.
- */
-static void *fill(int min)
-{
-	if (min <= input_len)
-		return input_buffer + input_offset;
-	if (min > sizeof(input_buffer))
-		die("cannot fill %d bytes", min);
-	flush();
-	do {
-		ssize_t ret = xread(input_fd, input_buffer + input_len,
-				sizeof(input_buffer) - input_len);
-		if (ret <= 0) {
-			if (!ret)
-				die("early EOF");
-			die_errno("read error on input");
-		}
-		input_len += ret;
-		if (from_stdin)
-			display_throughput(progress, consumed_bytes + input_len);
-	} while (input_len < min);
-	return input_buffer;
-}
-
-static void use(int bytes)
-{
-	if (bytes > input_len)
-		die("used more bytes than were available");
-	input_crc32 = crc32(input_crc32, input_buffer + input_offset, bytes);
-	input_len -= bytes;
-	input_offset += bytes;
-
-	/* make sure off_t is sufficiently large not to wrap */
-	if (consumed_bytes > consumed_bytes + bytes)
-		die("pack too large for current definition of off_t");
-	consumed_bytes += bytes;
-}
-
-static char *open_pack_file(char *pack_name)
-{
-	if (from_stdin) {
-		input_fd = 0;
-		if (!pack_name) {
-			static char tmpfile[PATH_MAX];
-			output_fd = odb_mkstemp(tmpfile, sizeof(tmpfile),
-						"pack/tmp_pack_XXXXXX");
-			pack_name = xstrdup(tmpfile);
-		} else
-			output_fd = open(pack_name, O_CREAT|O_EXCL|O_RDWR, 0600);
-		if (output_fd < 0)
-			die_errno("unable to create '%s'", pack_name);
-		pack_fd = output_fd;
-	} else {
-		input_fd = open(pack_name, O_RDONLY);
-		if (input_fd < 0)
-			die_errno("cannot open packfile '%s'", pack_name);
-		output_fd = -1;
-		pack_fd = input_fd;
-	}
-	git_SHA1_Init(&input_ctx);
-	return pack_name;
-}
-
-static void parse_pack_header(void)
-{
-	struct pack_header *hdr = fill(sizeof(struct pack_header));
-
-	/* Header consistency check */
-	if (hdr->hdr_signature != htonl(PACK_SIGNATURE))
-		die("pack signature mismatch");
-	if (!pack_version_ok(hdr->hdr_version))
-		die("pack version %"PRIu32" unsupported",
-			ntohl(hdr->hdr_version));
-
-	nr_objects = ntohl(hdr->hdr_entries);
-	use(sizeof(struct pack_header));
-}
-
-static NORETURN void bad_object(unsigned long offset, const char *format,
-		       ...) __attribute__((format (printf, 2, 3)));
-
-static void bad_object(unsigned long offset, const char *format, ...)
-{
-	va_list params;
-	char buf[1024];
-
-	va_start(params, format);
-	vsnprintf(buf, sizeof(buf), format, params);
-	va_end(params);
-	die("pack has bad object at offset %lu: %s", offset, buf);
-}
-
-static void free_base_data(struct base_data *c)
-{
-	if (c->data) {
-		free(c->data);
-		c->data = NULL;
-		base_cache_used -= c->size;
-	}
-}
-
-static void prune_base_data(struct base_data *retain)
-{
-	struct base_data *b;
-	for (b = base_cache;
-	     base_cache_used > delta_base_cache_limit && b;
-	     b = b->child) {
-		if (b->data && b != retain)
-			free_base_data(b);
-	}
-}
-
-static void link_base_data(struct base_data *base, struct base_data *c)
-{
-	if (base)
-		base->child = c;
-	else
-		base_cache = c;
-
-	c->base = base;
-	c->child = NULL;
-	if (c->data)
-		base_cache_used += c->size;
-	prune_base_data(c);
-}
-
-static void unlink_base_data(struct base_data *c)
-{
-	struct base_data *base = c->base;
-	if (base)
-		base->child = NULL;
-	else
-		base_cache = NULL;
-	free_base_data(c);
-}
-
-static void *unpack_entry_data(unsigned long offset, unsigned long size)
-{
-	z_stream stream;
-	void *buf = xmalloc(size);
-
-	memset(&stream, 0, sizeof(stream));
-	stream.next_out = buf;
-	stream.avail_out = size;
-	stream.next_in = fill(1);
-	stream.avail_in = input_len;
-	git_inflate_init(&stream);
-
-	for (;;) {
-		int ret = git_inflate(&stream, 0);
-		use(input_len - stream.avail_in);
-		if (stream.total_out == size && ret == Z_STREAM_END)
-			break;
-		if (ret != Z_OK)
-			bad_object(offset, "inflate returned %d", ret);
-		stream.next_in = fill(1);
-		stream.avail_in = input_len;
-	}
-	git_inflate_end(&stream);
-	return buf;
-}
-
-static void *unpack_raw_entry(struct object_entry *obj, union delta_base *delta_base)
-{
-	unsigned char *p;
-	unsigned long size, c;
-	off_t base_offset;
-	unsigned shift;
-	void *data;
-
-	obj->idx.offset = consumed_bytes;
-	input_crc32 = crc32(0, Z_NULL, 0);
-
-	p = fill(1);
-	c = *p;
-	use(1);
-	obj->type = (c >> 4) & 7;
-	size = (c & 15);
-	shift = 4;
-	while (c & 0x80) {
-		p = fill(1);
-		c = *p;
-		use(1);
-		size += (c & 0x7f) << shift;
-		shift += 7;
-	}
-	obj->size = size;
-
-	switch (obj->type) {
-	case OBJ_REF_DELTA:
-		hashcpy(delta_base->sha1, fill(20));
-		use(20);
-		break;
-	case OBJ_OFS_DELTA:
-		memset(delta_base, 0, sizeof(*delta_base));
-		p = fill(1);
-		c = *p;
-		use(1);
-		base_offset = c & 127;
-		while (c & 128) {
-			base_offset += 1;
-			if (!base_offset || MSB(base_offset, 7))
-				bad_object(obj->idx.offset, "offset value overflow for delta base object");
-			p = fill(1);
-			c = *p;
-			use(1);
-			base_offset = (base_offset << 7) + (c & 127);
-		}
-		delta_base->offset = obj->idx.offset - base_offset;
-		if (delta_base->offset <= 0 || delta_base->offset >= obj->idx.offset)
-			bad_object(obj->idx.offset, "delta base offset is out of bound");
-		break;
-	case OBJ_COMMIT:
-	case OBJ_TREE:
-	case OBJ_BLOB:
-	case OBJ_TAG:
-		break;
-	default:
-		bad_object(obj->idx.offset, "unknown object type %d", obj->type);
-	}
-	obj->hdr_size = consumed_bytes - obj->idx.offset;
-
-	data = unpack_entry_data(obj->idx.offset, obj->size);
-	obj->idx.crc32 = input_crc32;
-	return data;
-}
-
-static void *get_data_from_pack(struct object_entry *obj)
-{
-	off_t from = obj[0].idx.offset + obj[0].hdr_size;
-	unsigned long len = obj[1].idx.offset - from;
-	unsigned long rdy = 0;
-	unsigned char *src, *data;
-	z_stream stream;
-	int st;
-
-	src = xmalloc(len);
-	data = src;
-	do {
-		ssize_t n = pread(pack_fd, data + rdy, len - rdy, from + rdy);
-		if (n < 0)
-			die_errno("cannot pread pack file");
-		if (!n)
-			die("premature end of pack file, %lu bytes missing",
-			    len - rdy);
-		rdy += n;
-	} while (rdy < len);
-	data = xmalloc(obj->size);
-	memset(&stream, 0, sizeof(stream));
-	stream.next_out = data;
-	stream.avail_out = obj->size;
-	stream.next_in = src;
-	stream.avail_in = len;
-	git_inflate_init(&stream);
-	while ((st = git_inflate(&stream, Z_FINISH)) == Z_OK);
-	git_inflate_end(&stream);
-	if (st != Z_STREAM_END || stream.total_out != obj->size)
-		die("serious inflate inconsistency");
-	free(src);
-	return data;
-}
-
-static int find_delta(const union delta_base *base)
-{
-	int first = 0, last = nr_deltas;
-
-        while (first < last) {
-                int next = (first + last) / 2;
-                struct delta_entry *delta = &deltas[next];
-                int cmp;
-
-                cmp = memcmp(base, &delta->base, UNION_BASE_SZ);
-                if (!cmp)
-                        return next;
-                if (cmp < 0) {
-                        last = next;
-                        continue;
-                }
-                first = next+1;
-        }
-        return -first-1;
-}
-
-static void find_delta_children(const union delta_base *base,
-				int *first_index, int *last_index)
-{
-	int first = find_delta(base);
-	int last = first;
-	int end = nr_deltas - 1;
-
-	if (first < 0) {
-		*first_index = 0;
-		*last_index = -1;
-		return;
-	}
-	while (first > 0 && !memcmp(&deltas[first - 1].base, base, UNION_BASE_SZ))
-		--first;
-	while (last < end && !memcmp(&deltas[last + 1].base, base, UNION_BASE_SZ))
-		++last;
-	*first_index = first;
-	*last_index = last;
-}
-
-static void sha1_object(const void *data, unsigned long size,
-			enum object_type type, unsigned char *sha1)
-{
-	hash_sha1_file(data, size, typename(type), sha1);
-	if (has_sha1_file(sha1)) {
-		void *has_data;
-		enum object_type has_type;
-		unsigned long has_size;
-		has_data = read_sha1_file(sha1, &has_type, &has_size);
-		if (!has_data)
-			die("cannot read existing object %s", sha1_to_hex(sha1));
-		if (size != has_size || type != has_type ||
-		    memcmp(data, has_data, size) != 0)
-			die("SHA1 COLLISION FOUND WITH %s !", sha1_to_hex(sha1));
-		free(has_data);
-	}
-	if (strict) {
-		if (type == OBJ_BLOB) {
-			struct blob *blob = lookup_blob(sha1);
-			if (blob)
-				blob->object.flags |= FLAG_CHECKED;
-			else
-				die("invalid blob object %s", sha1_to_hex(sha1));
-		} else {
-			struct object *obj;
-			int eaten;
-			void *buf = (void *) data;
-
-			/*
-			 * we do not need to free the memory here, as the
-			 * buf is deleted by the caller.
-			 */
-			obj = parse_object_buffer(sha1, type, size, buf, &eaten);
-			if (!obj)
-				die("invalid %s", typename(type));
-			if (fsck_object(obj, 1, fsck_error_function))
-				die("Error in object");
-			if (fsck_walk(obj, mark_link, NULL))
-				die("Not all child objects of %s are reachable", sha1_to_hex(obj->sha1));
-
-			if (obj->type == OBJ_TREE) {
-				struct tree *item = (struct tree *) obj;
-				item->buffer = NULL;
-			}
-			if (obj->type == OBJ_COMMIT) {
-				struct commit *commit = (struct commit *) obj;
-				commit->buffer = NULL;
-			}
-			obj->flags |= FLAG_CHECKED;
-		}
-	}
-}
-
-static void *get_base_data(struct base_data *c)
-{
-	if (!c->data) {
-		struct object_entry *obj = c->obj;
-
-		if (obj->type == OBJ_REF_DELTA || obj->type == OBJ_OFS_DELTA) {
-			void *base = get_base_data(c->base);
-			void *raw = get_data_from_pack(obj);
-			c->data = patch_delta(
-				base, c->base->size,
-				raw, obj->size,
-				&c->size);
-			free(raw);
-			if (!c->data)
-				bad_object(obj->idx.offset, "failed to apply delta");
-		} else {
-			c->data = get_data_from_pack(obj);
-			c->size = obj->size;
-		}
-
-		base_cache_used += c->size;
-		prune_base_data(c);
-	}
-	return c->data;
-}
-
-static void resolve_delta(struct object_entry *delta_obj,
-			  struct base_data *base, struct base_data *result)
-{
-	void *base_data, *delta_data;
-
-	delta_obj->real_type = base->obj->real_type;
-	delta_data = get_data_from_pack(delta_obj);
-	base_data = get_base_data(base);
-	result->obj = delta_obj;
-	result->data = patch_delta(base_data, base->size,
-				   delta_data, delta_obj->size, &result->size);
-	free(delta_data);
-	if (!result->data)
-		bad_object(delta_obj->idx.offset, "failed to apply delta");
-	sha1_object(result->data, result->size, delta_obj->real_type,
-		    delta_obj->idx.sha1);
-	nr_resolved_deltas++;
-}
-
-static void find_unresolved_deltas(struct base_data *base,
-				   struct base_data *prev_base)
-{
-	int i, ref_first, ref_last, ofs_first, ofs_last;
-
-	/*
-	 * This is a recursive function. Those brackets should help reducing
-	 * stack usage by limiting the scope of the delta_base union.
-	 */
-	{
-		union delta_base base_spec;
-
-		hashcpy(base_spec.sha1, base->obj->idx.sha1);
-		find_delta_children(&base_spec, &ref_first, &ref_last);
-
-		memset(&base_spec, 0, sizeof(base_spec));
-		base_spec.offset = base->obj->idx.offset;
-		find_delta_children(&base_spec, &ofs_first, &ofs_last);
-	}
-
-	if (ref_last == -1 && ofs_last == -1) {
-		free(base->data);
-		return;
-	}
-
-	link_base_data(prev_base, base);
-
-	for (i = ref_first; i <= ref_last; i++) {
-		struct object_entry *child = objects + deltas[i].obj_no;
-		if (child->real_type == OBJ_REF_DELTA) {
-			struct base_data result;
-			resolve_delta(child, base, &result);
-			if (i == ref_last && ofs_last == -1)
-				free_base_data(base);
-			find_unresolved_deltas(&result, base);
-		}
-	}
-
-	for (i = ofs_first; i <= ofs_last; i++) {
-		struct object_entry *child = objects + deltas[i].obj_no;
-		if (child->real_type == OBJ_OFS_DELTA) {
-			struct base_data result;
-			resolve_delta(child, base, &result);
-			if (i == ofs_last)
-				free_base_data(base);
-			find_unresolved_deltas(&result, base);
-		}
-	}
-
-	unlink_base_data(base);
-}
-
-static int compare_delta_entry(const void *a, const void *b)
-{
-	const struct delta_entry *delta_a = a;
-	const struct delta_entry *delta_b = b;
-	return memcmp(&delta_a->base, &delta_b->base, UNION_BASE_SZ);
-}
-
-/* Parse all objects and return the pack content SHA1 hash */
-static void parse_pack_objects(unsigned char *sha1)
-{
-	int i;
-	struct delta_entry *delta = deltas;
-	struct stat st;
-
-	/*
-	 * First pass:
-	 * - find locations of all objects;
-	 * - calculate SHA1 of all non-delta objects;
-	 * - remember base (SHA1 or offset) for all deltas.
-	 */
-	if (verbose)
-		progress = start_progress(
-				from_stdin ? "Receiving objects" : "Indexing objects",
-				nr_objects);
-	for (i = 0; i < nr_objects; i++) {
-		struct object_entry *obj = &objects[i];
-		void *data = unpack_raw_entry(obj, &delta->base);
-		obj->real_type = obj->type;
-		if (obj->type == OBJ_REF_DELTA || obj->type == OBJ_OFS_DELTA) {
-			nr_deltas++;
-			delta->obj_no = i;
-			delta++;
-		} else
-			sha1_object(data, obj->size, obj->type, obj->idx.sha1);
-		free(data);
-		display_progress(progress, i+1);
-	}
-	objects[i].idx.offset = consumed_bytes;
-	stop_progress(&progress);
-
-	/* Check pack integrity */
-	flush();
-	git_SHA1_Final(sha1, &input_ctx);
-	if (hashcmp(fill(20), sha1))
-		die("pack is corrupted (SHA1 mismatch)");
-	use(20);
-
-	/* If input_fd is a file, we should have reached its end now. */
-	if (fstat(input_fd, &st))
-		die_errno("cannot fstat packfile");
-	if (S_ISREG(st.st_mode) &&
-			lseek(input_fd, 0, SEEK_CUR) - input_len != st.st_size)
-		die("pack has junk at the end");
-
-	if (!nr_deltas)
-		return;
-
-	/* Sort deltas by base SHA1/offset for fast searching */
-	qsort(deltas, nr_deltas, sizeof(struct delta_entry),
-	      compare_delta_entry);
-
-	/*
-	 * Second pass:
-	 * - for all non-delta objects, look if it is used as a base for
-	 *   deltas;
-	 * - if used as a base, uncompress the object and apply all deltas,
-	 *   recursively checking if the resulting object is used as a base
-	 *   for some more deltas.
-	 */
-	if (verbose)
-		progress = start_progress("Resolving deltas", nr_deltas);
-	for (i = 0; i < nr_objects; i++) {
-		struct object_entry *obj = &objects[i];
-		struct base_data base_obj;
-
-		if (obj->type == OBJ_REF_DELTA || obj->type == OBJ_OFS_DELTA)
-			continue;
-		base_obj.obj = obj;
-		base_obj.data = NULL;
-		find_unresolved_deltas(&base_obj, NULL);
-		display_progress(progress, nr_resolved_deltas);
-	}
-}
-
-static int write_compressed(struct sha1file *f, void *in, unsigned int size)
-{
-	z_stream stream;
-	unsigned long maxsize;
-	void *out;
-
-	memset(&stream, 0, sizeof(stream));
-	deflateInit(&stream, zlib_compression_level);
-	maxsize = deflateBound(&stream, size);
-	out = xmalloc(maxsize);
-
-	/* Compress it */
-	stream.next_in = in;
-	stream.avail_in = size;
-	stream.next_out = out;
-	stream.avail_out = maxsize;
-	while (deflate(&stream, Z_FINISH) == Z_OK);
-	deflateEnd(&stream);
-
-	size = stream.total_out;
-	sha1write(f, out, size);
-	free(out);
-	return size;
-}
-
-static struct object_entry *append_obj_to_pack(struct sha1file *f,
-			       const unsigned char *sha1, void *buf,
-			       unsigned long size, enum object_type type)
-{
-	struct object_entry *obj = &objects[nr_objects++];
-	unsigned char header[10];
-	unsigned long s = size;
-	int n = 0;
-	unsigned char c = (type << 4) | (s & 15);
-	s >>= 4;
-	while (s) {
-		header[n++] = c | 0x80;
-		c = s & 0x7f;
-		s >>= 7;
-	}
-	header[n++] = c;
-	crc32_begin(f);
-	sha1write(f, header, n);
-	obj[0].size = size;
-	obj[0].hdr_size = n;
-	obj[0].type = type;
-	obj[0].real_type = type;
-	obj[1].idx.offset = obj[0].idx.offset + n;
-	obj[1].idx.offset += write_compressed(f, buf, size);
-	obj[0].idx.crc32 = crc32_end(f);
-	sha1flush(f);
-	hashcpy(obj->idx.sha1, sha1);
-	return obj;
-}
-
-static int delta_pos_compare(const void *_a, const void *_b)
-{
-	struct delta_entry *a = *(struct delta_entry **)_a;
-	struct delta_entry *b = *(struct delta_entry **)_b;
-	return a->obj_no - b->obj_no;
-}
-
-static void fix_unresolved_deltas(struct sha1file *f, int nr_unresolved)
-{
-	struct delta_entry **sorted_by_pos;
-	int i, n = 0;
-
-	/*
-	 * Since many unresolved deltas may well be themselves base objects
-	 * for more unresolved deltas, we really want to include the
-	 * smallest number of base objects that would cover as much delta
-	 * as possible by picking the
-	 * trunc deltas first, allowing for other deltas to resolve without
-	 * additional base objects.  Since most base objects are to be found
-	 * before deltas depending on them, a good heuristic is to start
-	 * resolving deltas in the same order as their position in the pack.
-	 */
-	sorted_by_pos = xmalloc(nr_unresolved * sizeof(*sorted_by_pos));
-	for (i = 0; i < nr_deltas; i++) {
-		if (objects[deltas[i].obj_no].real_type != OBJ_REF_DELTA)
-			continue;
-		sorted_by_pos[n++] = &deltas[i];
-	}
-	qsort(sorted_by_pos, n, sizeof(*sorted_by_pos), delta_pos_compare);
-
-	for (i = 0; i < n; i++) {
-		struct delta_entry *d = sorted_by_pos[i];
-		enum object_type type;
-		struct base_data base_obj;
-
-		if (objects[d->obj_no].real_type != OBJ_REF_DELTA)
-			continue;
-		base_obj.data = read_sha1_file(d->base.sha1, &type, &base_obj.size);
-		if (!base_obj.data)
-			continue;
-
-		if (check_sha1_signature(d->base.sha1, base_obj.data,
-				base_obj.size, typename(type)))
-			die("local object %s is corrupt", sha1_to_hex(d->base.sha1));
-		base_obj.obj = append_obj_to_pack(f, d->base.sha1,
-					base_obj.data, base_obj.size, type);
-		find_unresolved_deltas(&base_obj, NULL);
-		display_progress(progress, nr_resolved_deltas);
-	}
-	free(sorted_by_pos);
-}
-
-static void final(const char *final_pack_name, const char *curr_pack_name,
-		  const char *final_index_name, const char *curr_index_name,
-		  const char *keep_name, const char *keep_msg,
-		  unsigned char *sha1)
-{
-	const char *report = "pack";
-	char name[PATH_MAX];
-	int err;
-
-	if (!from_stdin) {
-		close(input_fd);
-	} else {
-		fsync_or_die(output_fd, curr_pack_name);
-		err = close(output_fd);
-		if (err)
-			die_errno("error while closing pack file");
-	}
-
-	if (keep_msg) {
-		int keep_fd, keep_msg_len = strlen(keep_msg);
-
-		if (!keep_name)
-			keep_fd = odb_pack_keep(name, sizeof(name), sha1);
-		else
-			keep_fd = open(keep_name, O_RDWR|O_CREAT|O_EXCL, 0600);
-
-		if (keep_fd < 0) {
-			if (errno != EEXIST)
-				die_errno("cannot write keep file '%s'",
-					  keep_name);
-		} else {
-			if (keep_msg_len > 0) {
-				write_or_die(keep_fd, keep_msg, keep_msg_len);
-				write_or_die(keep_fd, "\n", 1);
-			}
-			if (close(keep_fd) != 0)
-				die_errno("cannot close written keep file '%s'",
-				    keep_name);
-			report = "keep";
-		}
-	}
-
-	if (final_pack_name != curr_pack_name) {
-		if (!final_pack_name) {
-			snprintf(name, sizeof(name), "%s/pack/pack-%s.pack",
-				 get_object_directory(), sha1_to_hex(sha1));
-			final_pack_name = name;
-		}
-		if (move_temp_to_file(curr_pack_name, final_pack_name))
-			die("cannot store pack file");
-	} else if (from_stdin)
-		chmod(final_pack_name, 0444);
-
-	if (final_index_name != curr_index_name) {
-		if (!final_index_name) {
-			snprintf(name, sizeof(name), "%s/pack/pack-%s.idx",
-				 get_object_directory(), sha1_to_hex(sha1));
-			final_index_name = name;
-		}
-		if (move_temp_to_file(curr_index_name, final_index_name))
-			die("cannot store index file");
-	} else
-		chmod(final_index_name, 0444);
-
-	if (!from_stdin) {
-		printf("%s\n", sha1_to_hex(sha1));
-	} else {
-		char buf[48];
-		int len = snprintf(buf, sizeof(buf), "%s\t%s\n",
-				   report, sha1_to_hex(sha1));
-		write_or_die(1, buf, len);
-
-		/*
-		 * Let's just mimic git-unpack-objects here and write
-		 * the last part of the input buffer to stdout.
-		 */
-		while (input_len) {
-			err = xwrite(1, input_buffer + input_offset, input_len);
-			if (err <= 0)
-				break;
-			input_len -= err;
-			input_offset += err;
-		}
-	}
-}
-
-static int git_index_pack_config(const char *k, const char *v, void *cb)
-{
-	if (!strcmp(k, "pack.indexversion")) {
-		pack_idx_default_version = git_config_int(k, v);
-		if (pack_idx_default_version > 2)
-			die("bad pack.indexversion=%"PRIu32,
-				pack_idx_default_version);
-		return 0;
-	}
-	return git_default_config(k, v, cb);
-}
-
-int main(int argc, char **argv)
-{
-	int i, fix_thin_pack = 0;
-	char *curr_pack, *pack_name = NULL;
-	char *curr_index, *index_name = NULL;
-	const char *keep_name = NULL, *keep_msg = NULL;
-	char *index_name_buf = NULL, *keep_name_buf = NULL;
-	struct pack_idx_entry **idx_objects;
-	unsigned char pack_sha1[20];
-
-	git_extract_argv0_path(argv[0]);
-
-	if (argc == 2 && !strcmp(argv[1], "-h"))
-		usage(index_pack_usage);
-
-	/*
-	 * We wish to read the repository's config file if any, and
-	 * for that it is necessary to call setup_git_directory_gently().
-	 * However if the cwd was inside .git/objects/pack/ then we need
-	 * to go back there or all the pack name arguments will be wrong.
-	 * And in that case we cannot rely on any prefix returned by
-	 * setup_git_directory_gently() either.
-	 */
-	{
-		char cwd[PATH_MAX+1];
-		int nongit;
-
-		if (!getcwd(cwd, sizeof(cwd)-1))
-			die("Unable to get current working directory");
-		setup_git_directory_gently(&nongit);
-		git_config(git_index_pack_config, NULL);
-		if (chdir(cwd))
-			die("Cannot come back to cwd");
-	}
-
-	for (i = 1; i < argc; i++) {
-		char *arg = argv[i];
-
-		if (*arg == '-') {
-			if (!strcmp(arg, "--stdin")) {
-				from_stdin = 1;
-			} else if (!strcmp(arg, "--fix-thin")) {
-				fix_thin_pack = 1;
-			} else if (!strcmp(arg, "--strict")) {
-				strict = 1;
-			} else if (!strcmp(arg, "--keep")) {
-				keep_msg = "";
-			} else if (!prefixcmp(arg, "--keep=")) {
-				keep_msg = arg + 7;
-			} else if (!prefixcmp(arg, "--pack_header=")) {
-				struct pack_header *hdr;
-				char *c;
-
-				hdr = (struct pack_header *)input_buffer;
-				hdr->hdr_signature = htonl(PACK_SIGNATURE);
-				hdr->hdr_version = htonl(strtoul(arg + 14, &c, 10));
-				if (*c != ',')
-					die("bad %s", arg);
-				hdr->hdr_entries = htonl(strtoul(c + 1, &c, 10));
-				if (*c)
-					die("bad %s", arg);
-				input_len = sizeof(*hdr);
-			} else if (!strcmp(arg, "-v")) {
-				verbose = 1;
-			} else if (!strcmp(arg, "-o")) {
-				if (index_name || (i+1) >= argc)
-					usage(index_pack_usage);
-				index_name = argv[++i];
-			} else if (!prefixcmp(arg, "--index-version=")) {
-				char *c;
-				pack_idx_default_version = strtoul(arg + 16, &c, 10);
-				if (pack_idx_default_version > 2)
-					die("bad %s", arg);
-				if (*c == ',')
-					pack_idx_off32_limit = strtoul(c+1, &c, 0);
-				if (*c || pack_idx_off32_limit & 0x80000000)
-					die("bad %s", arg);
-			} else
-				usage(index_pack_usage);
-			continue;
-		}
-
-		if (pack_name)
-			usage(index_pack_usage);
-		pack_name = arg;
-	}
-
-	if (!pack_name && !from_stdin)
-		usage(index_pack_usage);
-	if (fix_thin_pack && !from_stdin)
-		die("--fix-thin cannot be used without --stdin");
-	if (!index_name && pack_name) {
-		int len = strlen(pack_name);
-		if (!has_extension(pack_name, ".pack"))
-			die("packfile name '%s' does not end with '.pack'",
-			    pack_name);
-		index_name_buf = xmalloc(len);
-		memcpy(index_name_buf, pack_name, len - 5);
-		strcpy(index_name_buf + len - 5, ".idx");
-		index_name = index_name_buf;
-	}
-	if (keep_msg && !keep_name && pack_name) {
-		int len = strlen(pack_name);
-		if (!has_extension(pack_name, ".pack"))
-			die("packfile name '%s' does not end with '.pack'",
-			    pack_name);
-		keep_name_buf = xmalloc(len);
-		memcpy(keep_name_buf, pack_name, len - 5);
-		strcpy(keep_name_buf + len - 5, ".keep");
-		keep_name = keep_name_buf;
-	}
-
-	curr_pack = open_pack_file(pack_name);
-	parse_pack_header();
-	objects = xmalloc((nr_objects + 1) * sizeof(struct object_entry));
-	deltas = xmalloc(nr_objects * sizeof(struct delta_entry));
-	parse_pack_objects(pack_sha1);
-	if (nr_deltas == nr_resolved_deltas) {
-		stop_progress(&progress);
-		/* Flush remaining pack final 20-byte SHA1. */
-		flush();
-	} else {
-		if (fix_thin_pack) {
-			struct sha1file *f;
-			unsigned char read_sha1[20], tail_sha1[20];
-			char msg[48];
-			int nr_unresolved = nr_deltas - nr_resolved_deltas;
-			int nr_objects_initial = nr_objects;
-			if (nr_unresolved <= 0)
-				die("confusion beyond insanity");
-			objects = xrealloc(objects,
-					   (nr_objects + nr_unresolved + 1)
-					   * sizeof(*objects));
-			f = sha1fd(output_fd, curr_pack);
-			fix_unresolved_deltas(f, nr_unresolved);
-			sprintf(msg, "completed with %d local objects",
-				nr_objects - nr_objects_initial);
-			stop_progress_msg(&progress, msg);
-			sha1close(f, tail_sha1, 0);
-			hashcpy(read_sha1, pack_sha1);
-			fixup_pack_header_footer(output_fd, pack_sha1,
-						 curr_pack, nr_objects,
-						 read_sha1, consumed_bytes-20);
-			if (hashcmp(read_sha1, tail_sha1) != 0)
-				die("Unexpected tail checksum for %s "
-				    "(disk corruption?)", curr_pack);
-		}
-		if (nr_deltas != nr_resolved_deltas)
-			die("pack has %d unresolved deltas",
-			    nr_deltas - nr_resolved_deltas);
-	}
-	free(deltas);
-	if (strict)
-		check_objects();
-
-	idx_objects = xmalloc((nr_objects) * sizeof(struct pack_idx_entry *));
-	for (i = 0; i < nr_objects; i++)
-		idx_objects[i] = &objects[i].idx;
-	curr_index = write_idx_file(index_name, idx_objects, nr_objects, pack_sha1);
-	free(idx_objects);
-
-	final(pack_name, curr_pack,
-		index_name, curr_index,
-		keep_name, keep_msg,
-		pack_sha1);
-	free(objects);
-	free(index_name_buf);
-	free(keep_name_buf);
-	if (pack_name == NULL)
-		free(curr_pack);
-	if (index_name == NULL)
-		free(curr_index);
-
-	return 0;
-}