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-rw-r--r--index-pack.c948
1 files changed, 0 insertions, 948 deletions
diff --git a/index-pack.c b/index-pack.c
deleted file mode 100644
index b405864be9..0000000000
--- a/index-pack.c
+++ /dev/null
@@ -1,948 +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"
-
-static const char index_pack_usage[] =
-"git-index-pack [-v] [-o <index-file>] [{ ---keep | --keep=<msg> }] { <pack-file> | --stdin [--fix-thin] [<pack-file>] }";
-
-struct object_entry
-{
- unsigned long offset;
- unsigned long size;
- unsigned int hdr_size;
- enum object_type type;
- enum object_type real_type;
- unsigned char sha1[20];
-};
-
-union delta_base {
- unsigned char sha1[20];
- unsigned long offset;
-};
-
-/*
- * 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
-
-struct delta_entry
-{
- union delta_base base;
- int obj_no;
-};
-
-static struct object_entry *objects;
-static struct delta_entry *deltas;
-static int nr_objects;
-static int nr_deltas;
-static int nr_resolved_deltas;
-
-static int from_stdin;
-static int verbose;
-
-static volatile sig_atomic_t progress_update;
-
-static void progress_interval(int signum)
-{
- progress_update = 1;
-}
-
-static void setup_progress_signal(void)
-{
- struct sigaction sa;
- struct itimerval v;
-
- memset(&sa, 0, sizeof(sa));
- sa.sa_handler = progress_interval;
- sigemptyset(&sa.sa_mask);
- sa.sa_flags = SA_RESTART;
- sigaction(SIGALRM, &sa, NULL);
-
- v.it_interval.tv_sec = 1;
- v.it_interval.tv_usec = 0;
- v.it_value = v.it_interval;
- setitimer(ITIMER_REAL, &v, NULL);
-
-}
-
-static unsigned display_progress(unsigned n, unsigned total, unsigned last_pc)
-{
- unsigned percent = n * 100 / total;
- if (percent != last_pc || progress_update) {
- fprintf(stderr, "%4u%% (%u/%u) done\r", percent, n, total);
- progress_update = 0;
- }
- return percent;
-}
-
-/* We always read in 4kB chunks. */
-static unsigned char input_buffer[4096];
-static unsigned long input_offset, input_len, consumed_bytes;
-static SHA_CTX input_ctx;
-static int input_fd, output_fd, pack_fd;
-
-/* 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);
- 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 {
- int ret = xread(input_fd, input_buffer + input_len,
- sizeof(input_buffer) - input_len);
- if (ret <= 0) {
- if (!ret)
- die("early EOF");
- die("read error on input: %s", strerror(errno));
- }
- input_len += ret;
- } while (input_len < min);
- return input_buffer;
-}
-
-static void use(int bytes)
-{
- if (bytes > input_len)
- die("used more bytes than were available");
- input_len -= bytes;
- input_offset += bytes;
- consumed_bytes += bytes;
-}
-
-static const char *open_pack_file(const char *pack_name)
-{
- if (from_stdin) {
- input_fd = 0;
- if (!pack_name) {
- static char tmpfile[PATH_MAX];
- snprintf(tmpfile, sizeof(tmpfile),
- "%s/pack_XXXXXX", get_object_directory());
- output_fd = mkstemp(tmpfile);
- pack_name = xstrdup(tmpfile);
- } else
- output_fd = open(pack_name, O_CREAT|O_EXCL|O_RDWR, 0600);
- if (output_fd < 0)
- die("unable to create %s: %s\n", pack_name, strerror(errno));
- pack_fd = output_fd;
- } else {
- input_fd = open(pack_name, O_RDONLY);
- if (input_fd < 0)
- die("cannot open packfile '%s': %s",
- pack_name, strerror(errno));
- output_fd = -1;
- pack_fd = input_fd;
- }
- 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 %d unsupported", ntohl(hdr->hdr_version));
-
- nr_objects = ntohl(hdr->hdr_entries);
- use(sizeof(struct pack_header));
-}
-
-static void bad_object(unsigned long offset, const char *format,
- ...) NORETURN __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 *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;
- inflateInit(&stream);
-
- for (;;) {
- int ret = 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;
- }
- inflateEnd(&stream);
- return buf;
-}
-
-static void *unpack_raw_entry(struct object_entry *obj, union delta_base *delta_base)
-{
- unsigned char *p, c;
- unsigned long size, base_offset;
- unsigned shift;
-
- obj->offset = consumed_bytes;
-
- 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 & 0x7fUL) << 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 || base_offset & ~(~0UL >> 7))
- bad_object(obj->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->offset - base_offset;
- if (delta_base->offset >= obj->offset)
- bad_object(obj->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->offset, "unknown object type %d", obj->type);
- }
- obj->hdr_size = consumed_bytes - obj->offset;
-
- return unpack_entry_data(obj->offset, obj->size);
-}
-
-static void *get_data_from_pack(struct object_entry *obj)
-{
- unsigned long from = obj[0].offset + obj[0].hdr_size;
- unsigned long len = obj[1].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("cannot pread pack file: %s", strerror(errno));
- 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;
- inflateInit(&stream);
- while ((st = inflate(&stream, Z_FINISH)) == Z_OK);
- inflateEnd(&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 int 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)
- return -1;
- 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;
- return 0;
-}
-
-static void sha1_object(const void *data, unsigned long size,
- enum object_type type, unsigned char *sha1)
-{
- SHA_CTX ctx;
- char header[50];
- int header_size;
- const char *type_str;
-
- switch (type) {
- case OBJ_COMMIT: type_str = commit_type; break;
- case OBJ_TREE: type_str = tree_type; break;
- case OBJ_BLOB: type_str = blob_type; break;
- case OBJ_TAG: type_str = tag_type; break;
- default:
- die("bad type %d", type);
- }
-
- header_size = sprintf(header, "%s %lu", type_str, size) + 1;
-
- SHA1_Init(&ctx);
- SHA1_Update(&ctx, header, header_size);
- SHA1_Update(&ctx, data, size);
- SHA1_Final(sha1, &ctx);
-}
-
-static void resolve_delta(struct object_entry *delta_obj, void *base_data,
- unsigned long base_size, enum object_type type)
-{
- void *delta_data;
- unsigned long delta_size;
- void *result;
- unsigned long result_size;
- union delta_base delta_base;
- int j, first, last;
-
- delta_obj->real_type = type;
- delta_data = get_data_from_pack(delta_obj);
- delta_size = delta_obj->size;
- result = patch_delta(base_data, base_size, delta_data, delta_size,
- &result_size);
- free(delta_data);
- if (!result)
- bad_object(delta_obj->offset, "failed to apply delta");
- sha1_object(result, result_size, type, delta_obj->sha1);
- nr_resolved_deltas++;
-
- hashcpy(delta_base.sha1, delta_obj->sha1);
- if (!find_delta_children(&delta_base, &first, &last)) {
- for (j = first; j <= last; j++) {
- struct object_entry *child = objects + deltas[j].obj_no;
- if (child->real_type == OBJ_REF_DELTA)
- resolve_delta(child, result, result_size, type);
- }
- }
-
- memset(&delta_base, 0, sizeof(delta_base));
- delta_base.offset = delta_obj->offset;
- if (!find_delta_children(&delta_base, &first, &last)) {
- for (j = first; j <= last; j++) {
- struct object_entry *child = objects + deltas[j].obj_no;
- if (child->real_type == OBJ_OFS_DELTA)
- resolve_delta(child, result, result_size, type);
- }
- }
-
- free(result);
-}
-
-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, percent = -1;
- struct delta_entry *delta = deltas;
- void *data;
- 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)
- fprintf(stderr, "Indexing %d objects.\n", nr_objects);
- for (i = 0; i < nr_objects; i++) {
- struct object_entry *obj = &objects[i];
- 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->sha1);
- free(data);
- if (verbose)
- percent = display_progress(i+1, nr_objects, percent);
- }
- objects[i].offset = consumed_bytes;
- if (verbose)
- fputc('\n', stderr);
-
- /* Check pack integrity */
- flush();
- 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("cannot fstat packfile: %s", strerror(errno));
- 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)
- fprintf(stderr, "Resolving %d deltas.\n", nr_deltas);
- for (i = 0; i < nr_objects; i++) {
- struct object_entry *obj = &objects[i];
- union delta_base base;
- int j, ref, ref_first, ref_last, ofs, ofs_first, ofs_last;
-
- if (obj->type == OBJ_REF_DELTA || obj->type == OBJ_OFS_DELTA)
- continue;
- hashcpy(base.sha1, obj->sha1);
- ref = !find_delta_children(&base, &ref_first, &ref_last);
- memset(&base, 0, sizeof(base));
- base.offset = obj->offset;
- ofs = !find_delta_children(&base, &ofs_first, &ofs_last);
- if (!ref && !ofs)
- continue;
- data = get_data_from_pack(obj);
- if (ref)
- for (j = ref_first; j <= ref_last; j++) {
- struct object_entry *child = objects + deltas[j].obj_no;
- if (child->real_type == OBJ_REF_DELTA)
- resolve_delta(child, data,
- obj->size, obj->type);
- }
- if (ofs)
- for (j = ofs_first; j <= ofs_last; j++) {
- struct object_entry *child = objects + deltas[j].obj_no;
- if (child->real_type == OBJ_OFS_DELTA)
- resolve_delta(child, data,
- obj->size, obj->type);
- }
- free(data);
- if (verbose)
- percent = display_progress(nr_resolved_deltas,
- nr_deltas, percent);
- }
- if (verbose && nr_resolved_deltas == nr_deltas)
- fputc('\n', stderr);
-}
-
-static int write_compressed(int fd, 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;
- write_or_die(fd, out, size);
- free(out);
- return size;
-}
-
-static void append_obj_to_pack(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;
- write_or_die(output_fd, header, n);
- obj[1].offset = obj[0].offset + n;
- obj[1].offset += write_compressed(output_fd, buf, size);
- sha1_object(buf, size, type, obj->sha1);
-}
-
-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(int nr_unresolved)
-{
- struct delta_entry **sorted_by_pos;
- int i, n = 0, percent = -1;
-
- /*
- * 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];
- void *data;
- unsigned long size;
- enum object_type type;
- int j, first, last;
-
- if (objects[d->obj_no].real_type != OBJ_REF_DELTA)
- continue;
- data = read_sha1_file(d->base.sha1, &type, &size);
- if (!data)
- continue;
-
- find_delta_children(&d->base, &first, &last);
- for (j = first; j <= last; j++) {
- struct object_entry *child = objects + deltas[j].obj_no;
- if (child->real_type == OBJ_REF_DELTA)
- resolve_delta(child, data, size, type);
- }
-
- append_obj_to_pack(data, size, type);
- free(data);
- if (verbose)
- percent = display_progress(nr_resolved_deltas,
- nr_deltas, percent);
- }
- free(sorted_by_pos);
- if (verbose)
- fputc('\n', stderr);
-}
-
-static void readjust_pack_header_and_sha1(unsigned char *sha1)
-{
- struct pack_header hdr;
- SHA_CTX ctx;
- int size;
-
- /* Rewrite pack header with updated object number */
- if (lseek(output_fd, 0, SEEK_SET) != 0)
- die("cannot seek back: %s", strerror(errno));
- if (read_in_full(output_fd, &hdr, sizeof(hdr)) != sizeof(hdr))
- die("cannot read pack header back: %s", strerror(errno));
- hdr.hdr_entries = htonl(nr_objects);
- if (lseek(output_fd, 0, SEEK_SET) != 0)
- die("cannot seek back: %s", strerror(errno));
- write_or_die(output_fd, &hdr, sizeof(hdr));
- if (lseek(output_fd, 0, SEEK_SET) != 0)
- die("cannot seek back: %s", strerror(errno));
-
- /* Recompute and store the new pack's SHA1 */
- SHA1_Init(&ctx);
- do {
- unsigned char *buf[4096];
- size = xread(output_fd, buf, sizeof(buf));
- if (size < 0)
- die("cannot read pack data back: %s", strerror(errno));
- SHA1_Update(&ctx, buf, size);
- } while (size > 0);
- SHA1_Final(sha1, &ctx);
- write_or_die(output_fd, sha1, 20);
-}
-
-static int sha1_compare(const void *_a, const void *_b)
-{
- struct object_entry *a = *(struct object_entry **)_a;
- struct object_entry *b = *(struct object_entry **)_b;
- return hashcmp(a->sha1, b->sha1);
-}
-
-/*
- * On entry *sha1 contains the pack content SHA1 hash, on exit it is
- * the SHA1 hash of sorted object names.
- */
-static const char *write_index_file(const char *index_name, unsigned char *sha1)
-{
- struct sha1file *f;
- struct object_entry **sorted_by_sha, **list, **last;
- unsigned int array[256];
- int i, fd;
- SHA_CTX ctx;
-
- if (nr_objects) {
- sorted_by_sha =
- xcalloc(nr_objects, sizeof(struct object_entry *));
- list = sorted_by_sha;
- last = sorted_by_sha + nr_objects;
- for (i = 0; i < nr_objects; ++i)
- sorted_by_sha[i] = &objects[i];
- qsort(sorted_by_sha, nr_objects, sizeof(sorted_by_sha[0]),
- sha1_compare);
-
- }
- else
- sorted_by_sha = list = last = NULL;
-
- if (!index_name) {
- static char tmpfile[PATH_MAX];
- snprintf(tmpfile, sizeof(tmpfile),
- "%s/index_XXXXXX", get_object_directory());
- fd = mkstemp(tmpfile);
- index_name = xstrdup(tmpfile);
- } else {
- unlink(index_name);
- fd = open(index_name, O_CREAT|O_EXCL|O_WRONLY, 0600);
- }
- if (fd < 0)
- die("unable to create %s: %s", index_name, strerror(errno));
- f = sha1fd(fd, index_name);
-
- /*
- * Write the first-level table (the list is sorted,
- * but we use a 256-entry lookup to be able to avoid
- * having to do eight extra binary search iterations).
- */
- for (i = 0; i < 256; i++) {
- struct object_entry **next = list;
- while (next < last) {
- struct object_entry *obj = *next;
- if (obj->sha1[0] != i)
- break;
- next++;
- }
- array[i] = htonl(next - sorted_by_sha);
- list = next;
- }
- sha1write(f, array, 256 * sizeof(int));
-
- /* recompute the SHA1 hash of sorted object names.
- * currently pack-objects does not do this, but that
- * can be fixed.
- */
- SHA1_Init(&ctx);
- /*
- * Write the actual SHA1 entries..
- */
- list = sorted_by_sha;
- for (i = 0; i < nr_objects; i++) {
- struct object_entry *obj = *list++;
- unsigned int offset = htonl(obj->offset);
- sha1write(f, &offset, 4);
- sha1write(f, obj->sha1, 20);
- SHA1_Update(&ctx, obj->sha1, 20);
- }
- sha1write(f, sha1, 20);
- sha1close(f, NULL, 1);
- free(sorted_by_sha);
- SHA1_Final(sha1, &ctx);
- return index_name;
-}
-
-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 {
- err = close(output_fd);
- if (err)
- die("error while closing pack file: %s", strerror(errno));
- chmod(curr_pack_name, 0444);
- }
-
- if (keep_msg) {
- int keep_fd, keep_msg_len = strlen(keep_msg);
- if (!keep_name) {
- snprintf(name, sizeof(name), "%s/pack/pack-%s.keep",
- get_object_directory(), sha1_to_hex(sha1));
- keep_name = name;
- }
- keep_fd = open(keep_name, O_RDWR|O_CREAT|O_EXCL, 0600);
- if (keep_fd < 0) {
- if (errno != EEXIST)
- die("cannot write keep file");
- } else {
- if (keep_msg_len > 0) {
- write_or_die(keep_fd, keep_msg, keep_msg_len);
- write_or_die(keep_fd, "\n", 1);
- }
- close(keep_fd);
- 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");
- }
-
- chmod(curr_index_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");
- }
-
- 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;
- }
- }
-}
-
-int main(int argc, char **argv)
-{
- int i, fix_thin_pack = 0;
- const char *curr_pack, *pack_name = NULL;
- const char *curr_index, *index_name = NULL;
- const char *keep_name = NULL, *keep_msg = NULL;
- char *index_name_buf = NULL, *keep_name_buf = NULL;
- unsigned char sha1[20];
-
- for (i = 1; i < argc; i++) {
- const 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, "--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
- 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));
- if (verbose)
- setup_progress_signal();
- parse_pack_objects(sha1);
- if (nr_deltas != nr_resolved_deltas) {
- if (fix_thin_pack) {
- 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));
- fix_unresolved_deltas(nr_unresolved);
- if (verbose)
- fprintf(stderr, "%d objects were added to complete this thin pack.\n",
- nr_objects - nr_objects_initial);
- readjust_pack_header_and_sha1(sha1);
- }
- if (nr_deltas != nr_resolved_deltas)
- die("pack has %d unresolved deltas",
- nr_deltas - nr_resolved_deltas);
- } else {
- /* Flush remaining pack final 20-byte SHA1. */
- flush();
- }
- free(deltas);
- curr_index = write_index_file(index_name, sha1);
- final(pack_name, curr_pack,
- index_name, curr_index,
- keep_name, keep_msg,
- sha1);
- free(objects);
- free(index_name_buf);
- free(keep_name_buf);
-
- return 0;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-15 00:56:40 +0000