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fast-import.c
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3638 lines (3182 loc) · 92.1 KB
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#include "builtin.h"
#include "cache.h"
#include "repository.h"
#include "config.h"
#include "lockfile.h"
#include "object.h"
#include "blob.h"
#include "tree.h"
#include "commit.h"
#include "delta.h"
#include "pack.h"
#include "refs.h"
#include "csum-file.h"
#include "quote.h"
#include "dir.h"
#include "run-command.h"
#include "packfile.h"
#include "object-store.h"
#include "mem-pool.h"
#include "commit-reach.h"
#include "khash.h"
#define PACK_ID_BITS 16
#define MAX_PACK_ID ((1<<PACK_ID_BITS)-1)
#define DEPTH_BITS 13
#define MAX_DEPTH ((1<<DEPTH_BITS)-1)
/*
* We abuse the setuid bit on directories to mean "do not delta".
*/
#define NO_DELTA S_ISUID
/*
* The amount of additional space required in order to write an object into the
* current pack. This is the hash lengths at the end of the pack, plus the
* length of one object ID.
*/
#define PACK_SIZE_THRESHOLD (the_hash_algo->rawsz * 3)
struct object_entry {
struct pack_idx_entry idx;
struct hashmap_entry ent;
uint32_t type : TYPE_BITS,
pack_id : PACK_ID_BITS,
depth : DEPTH_BITS;
};
static int object_entry_hashcmp(const void *map_data,
const struct hashmap_entry *eptr,
const struct hashmap_entry *entry_or_key,
const void *keydata)
{
const struct object_id *oid = keydata;
const struct object_entry *e1, *e2;
e1 = container_of(eptr, const struct object_entry, ent);
if (oid)
return oidcmp(&e1->idx.oid, oid);
e2 = container_of(entry_or_key, const struct object_entry, ent);
return oidcmp(&e1->idx.oid, &e2->idx.oid);
}
struct object_entry_pool {
struct object_entry_pool *next_pool;
struct object_entry *next_free;
struct object_entry *end;
struct object_entry entries[FLEX_ARRAY]; /* more */
};
struct mark_set {
union {
struct object_id *oids[1024];
struct object_entry *marked[1024];
struct mark_set *sets[1024];
} data;
unsigned int shift;
};
struct last_object {
struct strbuf data;
off_t offset;
unsigned int depth;
unsigned no_swap : 1;
};
struct atom_str {
struct atom_str *next_atom;
unsigned short str_len;
char str_dat[FLEX_ARRAY]; /* more */
};
struct tree_content;
struct tree_entry {
struct tree_content *tree;
struct atom_str *name;
struct tree_entry_ms {
uint16_t mode;
struct object_id oid;
} versions[2];
};
struct tree_content {
unsigned int entry_capacity; /* must match avail_tree_content */
unsigned int entry_count;
unsigned int delta_depth;
struct tree_entry *entries[FLEX_ARRAY]; /* more */
};
struct avail_tree_content {
unsigned int entry_capacity; /* must match tree_content */
struct avail_tree_content *next_avail;
};
struct branch {
struct branch *table_next_branch;
struct branch *active_next_branch;
const char *name;
struct tree_entry branch_tree;
uintmax_t last_commit;
uintmax_t num_notes;
unsigned active : 1;
unsigned delete : 1;
unsigned pack_id : PACK_ID_BITS;
struct object_id oid;
};
struct tag {
struct tag *next_tag;
const char *name;
unsigned int pack_id;
struct object_id oid;
};
struct hash_list {
struct hash_list *next;
struct object_id oid;
};
typedef enum {
WHENSPEC_RAW = 1,
WHENSPEC_RAW_PERMISSIVE,
WHENSPEC_RFC2822,
WHENSPEC_NOW
} whenspec_type;
struct recent_command {
struct recent_command *prev;
struct recent_command *next;
char *buf;
};
typedef void (*mark_set_inserter_t)(struct mark_set **s, struct object_id *oid, uintmax_t mark);
typedef void (*each_mark_fn_t)(uintmax_t mark, void *obj, void *cbp);
/* Configured limits on output */
static unsigned long max_depth = 50;
static off_t max_packsize;
static int unpack_limit = 100;
static int force_update;
/* Stats and misc. counters */
static uintmax_t alloc_count;
static uintmax_t marks_set_count;
static uintmax_t object_count_by_type[1 << TYPE_BITS];
static uintmax_t duplicate_count_by_type[1 << TYPE_BITS];
static uintmax_t delta_count_by_type[1 << TYPE_BITS];
static uintmax_t delta_count_attempts_by_type[1 << TYPE_BITS];
static unsigned long object_count;
static unsigned long branch_count;
static unsigned long branch_load_count;
static int failure;
static FILE *pack_edges;
static unsigned int show_stats = 1;
static int global_argc;
static const char **global_argv;
/* Memory pools */
static struct mem_pool fi_mem_pool = {NULL, 2*1024*1024 -
sizeof(struct mp_block), 0 };
/* Atom management */
static unsigned int atom_table_sz = 4451;
static unsigned int atom_cnt;
static struct atom_str **atom_table;
/* The .pack file being generated */
static struct pack_idx_option pack_idx_opts;
static unsigned int pack_id;
static struct hashfile *pack_file;
static struct packed_git *pack_data;
static struct packed_git **all_packs;
static off_t pack_size;
/* Table of objects we've written. */
static unsigned int object_entry_alloc = 5000;
static struct object_entry_pool *blocks;
static struct hashmap object_table;
static struct mark_set *marks;
static const char *export_marks_file;
static const char *import_marks_file;
static int import_marks_file_from_stream;
static int import_marks_file_ignore_missing;
static int import_marks_file_done;
static int relative_marks_paths;
/* Our last blob */
static struct last_object last_blob = { STRBUF_INIT, 0, 0, 0 };
/* Tree management */
static unsigned int tree_entry_alloc = 1000;
static void *avail_tree_entry;
static unsigned int avail_tree_table_sz = 100;
static struct avail_tree_content **avail_tree_table;
static size_t tree_entry_allocd;
static struct strbuf old_tree = STRBUF_INIT;
static struct strbuf new_tree = STRBUF_INIT;
/* Branch data */
static unsigned long max_active_branches = 5;
static unsigned long cur_active_branches;
static unsigned long branch_table_sz = 1039;
static struct branch **branch_table;
static struct branch *active_branches;
/* Tag data */
static struct tag *first_tag;
static struct tag *last_tag;
/* Input stream parsing */
static whenspec_type whenspec = WHENSPEC_RAW;
static struct strbuf command_buf = STRBUF_INIT;
static int unread_command_buf;
static struct recent_command cmd_hist = {&cmd_hist, &cmd_hist, NULL};
static struct recent_command *cmd_tail = &cmd_hist;
static struct recent_command *rc_free;
static unsigned int cmd_save = 100;
static uintmax_t next_mark;
static struct strbuf new_data = STRBUF_INIT;
static int seen_data_command;
static int require_explicit_termination;
static int allow_unsafe_features;
/* Signal handling */
static volatile sig_atomic_t checkpoint_requested;
/* Submodule marks */
static struct string_list sub_marks_from = STRING_LIST_INIT_DUP;
static struct string_list sub_marks_to = STRING_LIST_INIT_DUP;
static kh_oid_map_t *sub_oid_map;
/* Where to write output of cat-blob commands */
static int cat_blob_fd = STDOUT_FILENO;
static void parse_argv(void);
static void parse_get_mark(const char *p);
static void parse_cat_blob(const char *p);
static void parse_ls(const char *p, struct branch *b);
static void for_each_mark(struct mark_set *m, uintmax_t base, each_mark_fn_t callback, void *p)
{
uintmax_t k;
if (m->shift) {
for (k = 0; k < 1024; k++) {
if (m->data.sets[k])
for_each_mark(m->data.sets[k], base + (k << m->shift), callback, p);
}
} else {
for (k = 0; k < 1024; k++) {
if (m->data.marked[k])
callback(base + k, m->data.marked[k], p);
}
}
}
static void dump_marks_fn(uintmax_t mark, void *object, void *cbp) {
struct object_entry *e = object;
FILE *f = cbp;
fprintf(f, ":%" PRIuMAX " %s\n", mark, oid_to_hex(&e->idx.oid));
}
static void write_branch_report(FILE *rpt, struct branch *b)
{
fprintf(rpt, "%s:\n", b->name);
fprintf(rpt, " status :");
if (b->active)
fputs(" active", rpt);
if (b->branch_tree.tree)
fputs(" loaded", rpt);
if (is_null_oid(&b->branch_tree.versions[1].oid))
fputs(" dirty", rpt);
fputc('\n', rpt);
fprintf(rpt, " tip commit : %s\n", oid_to_hex(&b->oid));
fprintf(rpt, " old tree : %s\n",
oid_to_hex(&b->branch_tree.versions[0].oid));
fprintf(rpt, " cur tree : %s\n",
oid_to_hex(&b->branch_tree.versions[1].oid));
fprintf(rpt, " commit clock: %" PRIuMAX "\n", b->last_commit);
fputs(" last pack : ", rpt);
if (b->pack_id < MAX_PACK_ID)
fprintf(rpt, "%u", b->pack_id);
fputc('\n', rpt);
fputc('\n', rpt);
}
static void write_crash_report(const char *err)
{
char *loc = git_pathdup("fast_import_crash_%"PRIuMAX, (uintmax_t) getpid());
FILE *rpt = fopen(loc, "w");
struct branch *b;
unsigned long lu;
struct recent_command *rc;
if (!rpt) {
error_errno("can't write crash report %s", loc);
free(loc);
return;
}
fprintf(stderr, "fast-import: dumping crash report to %s\n", loc);
fprintf(rpt, "fast-import crash report:\n");
fprintf(rpt, " fast-import process: %"PRIuMAX"\n", (uintmax_t) getpid());
fprintf(rpt, " parent process : %"PRIuMAX"\n", (uintmax_t) getppid());
fprintf(rpt, " at %s\n", show_date(time(NULL), 0, DATE_MODE(ISO8601)));
fputc('\n', rpt);
fputs("fatal: ", rpt);
fputs(err, rpt);
fputc('\n', rpt);
fputc('\n', rpt);
fputs("Most Recent Commands Before Crash\n", rpt);
fputs("---------------------------------\n", rpt);
for (rc = cmd_hist.next; rc != &cmd_hist; rc = rc->next) {
if (rc->next == &cmd_hist)
fputs("* ", rpt);
else
fputs(" ", rpt);
fputs(rc->buf, rpt);
fputc('\n', rpt);
}
fputc('\n', rpt);
fputs("Active Branch LRU\n", rpt);
fputs("-----------------\n", rpt);
fprintf(rpt, " active_branches = %lu cur, %lu max\n",
cur_active_branches,
max_active_branches);
fputc('\n', rpt);
fputs(" pos clock name\n", rpt);
fputs(" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n", rpt);
for (b = active_branches, lu = 0; b; b = b->active_next_branch)
fprintf(rpt, " %2lu) %6" PRIuMAX" %s\n",
++lu, b->last_commit, b->name);
fputc('\n', rpt);
fputs("Inactive Branches\n", rpt);
fputs("-----------------\n", rpt);
for (lu = 0; lu < branch_table_sz; lu++) {
for (b = branch_table[lu]; b; b = b->table_next_branch)
write_branch_report(rpt, b);
}
if (first_tag) {
struct tag *tg;
fputc('\n', rpt);
fputs("Annotated Tags\n", rpt);
fputs("--------------\n", rpt);
for (tg = first_tag; tg; tg = tg->next_tag) {
fputs(oid_to_hex(&tg->oid), rpt);
fputc(' ', rpt);
fputs(tg->name, rpt);
fputc('\n', rpt);
}
}
fputc('\n', rpt);
fputs("Marks\n", rpt);
fputs("-----\n", rpt);
if (export_marks_file)
fprintf(rpt, " exported to %s\n", export_marks_file);
else
for_each_mark(marks, 0, dump_marks_fn, rpt);
fputc('\n', rpt);
fputs("-------------------\n", rpt);
fputs("END OF CRASH REPORT\n", rpt);
fclose(rpt);
free(loc);
}
static void end_packfile(void);
static void unkeep_all_packs(void);
static void dump_marks(void);
static NORETURN void die_nicely(const char *err, va_list params)
{
va_list cp;
static int zombie;
report_fn die_message_fn = get_die_message_routine();
va_copy(cp, params);
die_message_fn(err, params);
if (!zombie) {
char message[2 * PATH_MAX];
zombie = 1;
vsnprintf(message, sizeof(message), err, cp);
write_crash_report(message);
end_packfile();
unkeep_all_packs();
dump_marks();
}
exit(128);
}
#ifndef SIGUSR1 /* Windows, for example */
static void set_checkpoint_signal(void)
{
}
#else
static void checkpoint_signal(int signo)
{
checkpoint_requested = 1;
}
static void set_checkpoint_signal(void)
{
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = checkpoint_signal;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
sigaction(SIGUSR1, &sa, NULL);
}
#endif
static void alloc_objects(unsigned int cnt)
{
struct object_entry_pool *b;
b = xmalloc(sizeof(struct object_entry_pool)
+ cnt * sizeof(struct object_entry));
b->next_pool = blocks;
b->next_free = b->entries;
b->end = b->entries + cnt;
blocks = b;
alloc_count += cnt;
}
static struct object_entry *new_object(struct object_id *oid)
{
struct object_entry *e;
if (blocks->next_free == blocks->end)
alloc_objects(object_entry_alloc);
e = blocks->next_free++;
oidcpy(&e->idx.oid, oid);
return e;
}
static struct object_entry *find_object(struct object_id *oid)
{
return hashmap_get_entry_from_hash(&object_table, oidhash(oid), oid,
struct object_entry, ent);
}
static struct object_entry *insert_object(struct object_id *oid)
{
struct object_entry *e;
unsigned int hash = oidhash(oid);
e = hashmap_get_entry_from_hash(&object_table, hash, oid,
struct object_entry, ent);
if (!e) {
e = new_object(oid);
e->idx.offset = 0;
hashmap_entry_init(&e->ent, hash);
hashmap_add(&object_table, &e->ent);
}
return e;
}
static void invalidate_pack_id(unsigned int id)
{
unsigned long lu;
struct tag *t;
struct hashmap_iter iter;
struct object_entry *e;
hashmap_for_each_entry(&object_table, &iter, e, ent) {
if (e->pack_id == id)
e->pack_id = MAX_PACK_ID;
}
for (lu = 0; lu < branch_table_sz; lu++) {
struct branch *b;
for (b = branch_table[lu]; b; b = b->table_next_branch)
if (b->pack_id == id)
b->pack_id = MAX_PACK_ID;
}
for (t = first_tag; t; t = t->next_tag)
if (t->pack_id == id)
t->pack_id = MAX_PACK_ID;
}
static unsigned int hc_str(const char *s, size_t len)
{
unsigned int r = 0;
while (len-- > 0)
r = r * 31 + *s++;
return r;
}
static void insert_mark(struct mark_set **top, uintmax_t idnum, struct object_entry *oe)
{
struct mark_set *s = *top;
while ((idnum >> s->shift) >= 1024) {
s = mem_pool_calloc(&fi_mem_pool, 1, sizeof(struct mark_set));
s->shift = (*top)->shift + 10;
s->data.sets[0] = *top;
*top = s;
}
while (s->shift) {
uintmax_t i = idnum >> s->shift;
idnum -= i << s->shift;
if (!s->data.sets[i]) {
s->data.sets[i] = mem_pool_calloc(&fi_mem_pool, 1, sizeof(struct mark_set));
s->data.sets[i]->shift = s->shift - 10;
}
s = s->data.sets[i];
}
if (!s->data.marked[idnum])
marks_set_count++;
s->data.marked[idnum] = oe;
}
static void *find_mark(struct mark_set *s, uintmax_t idnum)
{
uintmax_t orig_idnum = idnum;
struct object_entry *oe = NULL;
if ((idnum >> s->shift) < 1024) {
while (s && s->shift) {
uintmax_t i = idnum >> s->shift;
idnum -= i << s->shift;
s = s->data.sets[i];
}
if (s)
oe = s->data.marked[idnum];
}
if (!oe)
die("mark :%" PRIuMAX " not declared", orig_idnum);
return oe;
}
static struct atom_str *to_atom(const char *s, unsigned short len)
{
unsigned int hc = hc_str(s, len) % atom_table_sz;
struct atom_str *c;
for (c = atom_table[hc]; c; c = c->next_atom)
if (c->str_len == len && !strncmp(s, c->str_dat, len))
return c;
c = mem_pool_alloc(&fi_mem_pool, sizeof(struct atom_str) + len + 1);
c->str_len = len;
memcpy(c->str_dat, s, len);
c->str_dat[len] = 0;
c->next_atom = atom_table[hc];
atom_table[hc] = c;
atom_cnt++;
return c;
}
static struct branch *lookup_branch(const char *name)
{
unsigned int hc = hc_str(name, strlen(name)) % branch_table_sz;
struct branch *b;
for (b = branch_table[hc]; b; b = b->table_next_branch)
if (!strcmp(name, b->name))
return b;
return NULL;
}
static struct branch *new_branch(const char *name)
{
unsigned int hc = hc_str(name, strlen(name)) % branch_table_sz;
struct branch *b = lookup_branch(name);
if (b)
die("Invalid attempt to create duplicate branch: %s", name);
if (check_refname_format(name, REFNAME_ALLOW_ONELEVEL))
die("Branch name doesn't conform to GIT standards: %s", name);
b = mem_pool_calloc(&fi_mem_pool, 1, sizeof(struct branch));
b->name = mem_pool_strdup(&fi_mem_pool, name);
b->table_next_branch = branch_table[hc];
b->branch_tree.versions[0].mode = S_IFDIR;
b->branch_tree.versions[1].mode = S_IFDIR;
b->num_notes = 0;
b->active = 0;
b->pack_id = MAX_PACK_ID;
branch_table[hc] = b;
branch_count++;
return b;
}
static unsigned int hc_entries(unsigned int cnt)
{
cnt = cnt & 7 ? (cnt / 8) + 1 : cnt / 8;
return cnt < avail_tree_table_sz ? cnt : avail_tree_table_sz - 1;
}
static struct tree_content *new_tree_content(unsigned int cnt)
{
struct avail_tree_content *f, *l = NULL;
struct tree_content *t;
unsigned int hc = hc_entries(cnt);
for (f = avail_tree_table[hc]; f; l = f, f = f->next_avail)
if (f->entry_capacity >= cnt)
break;
if (f) {
if (l)
l->next_avail = f->next_avail;
else
avail_tree_table[hc] = f->next_avail;
} else {
cnt = cnt & 7 ? ((cnt / 8) + 1) * 8 : cnt;
f = mem_pool_alloc(&fi_mem_pool, sizeof(*t) + sizeof(t->entries[0]) * cnt);
f->entry_capacity = cnt;
}
t = (struct tree_content*)f;
t->entry_count = 0;
t->delta_depth = 0;
return t;
}
static void release_tree_entry(struct tree_entry *e);
static void release_tree_content(struct tree_content *t)
{
struct avail_tree_content *f = (struct avail_tree_content*)t;
unsigned int hc = hc_entries(f->entry_capacity);
f->next_avail = avail_tree_table[hc];
avail_tree_table[hc] = f;
}
static void release_tree_content_recursive(struct tree_content *t)
{
unsigned int i;
for (i = 0; i < t->entry_count; i++)
release_tree_entry(t->entries[i]);
release_tree_content(t);
}
static struct tree_content *grow_tree_content(
struct tree_content *t,
int amt)
{
struct tree_content *r = new_tree_content(t->entry_count + amt);
r->entry_count = t->entry_count;
r->delta_depth = t->delta_depth;
COPY_ARRAY(r->entries, t->entries, t->entry_count);
release_tree_content(t);
return r;
}
static struct tree_entry *new_tree_entry(void)
{
struct tree_entry *e;
if (!avail_tree_entry) {
unsigned int n = tree_entry_alloc;
tree_entry_allocd += n * sizeof(struct tree_entry);
ALLOC_ARRAY(e, n);
avail_tree_entry = e;
while (n-- > 1) {
*((void**)e) = e + 1;
e++;
}
*((void**)e) = NULL;
}
e = avail_tree_entry;
avail_tree_entry = *((void**)e);
return e;
}
static void release_tree_entry(struct tree_entry *e)
{
if (e->tree)
release_tree_content_recursive(e->tree);
*((void**)e) = avail_tree_entry;
avail_tree_entry = e;
}
static struct tree_content *dup_tree_content(struct tree_content *s)
{
struct tree_content *d;
struct tree_entry *a, *b;
unsigned int i;
if (!s)
return NULL;
d = new_tree_content(s->entry_count);
for (i = 0; i < s->entry_count; i++) {
a = s->entries[i];
b = new_tree_entry();
memcpy(b, a, sizeof(*a));
if (a->tree && is_null_oid(&b->versions[1].oid))
b->tree = dup_tree_content(a->tree);
else
b->tree = NULL;
d->entries[i] = b;
}
d->entry_count = s->entry_count;
d->delta_depth = s->delta_depth;
return d;
}
static void start_packfile(void)
{
struct strbuf tmp_file = STRBUF_INIT;
struct packed_git *p;
int pack_fd;
pack_fd = odb_mkstemp(&tmp_file, "pack/tmp_pack_XXXXXX");
FLEX_ALLOC_STR(p, pack_name, tmp_file.buf);
strbuf_release(&tmp_file);
p->pack_fd = pack_fd;
p->do_not_close = 1;
pack_file = hashfd(pack_fd, p->pack_name);
pack_data = p;
pack_size = write_pack_header(pack_file, 0);
object_count = 0;
REALLOC_ARRAY(all_packs, pack_id + 1);
all_packs[pack_id] = p;
}
static const char *create_index(void)
{
const char *tmpfile;
struct pack_idx_entry **idx, **c, **last;
struct object_entry *e;
struct object_entry_pool *o;
/* Build the table of object IDs. */
ALLOC_ARRAY(idx, object_count);
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->idx;
last = idx + object_count;
if (c != last)
die("internal consistency error creating the index");
tmpfile = write_idx_file(NULL, idx, object_count, &pack_idx_opts,
pack_data->hash);
free(idx);
return tmpfile;
}
static char *keep_pack(const char *curr_index_name)
{
static const char *keep_msg = "fast-import";
struct strbuf name = STRBUF_INIT;
int keep_fd;
odb_pack_name(&name, pack_data->hash, "keep");
keep_fd = odb_pack_keep(name.buf);
if (keep_fd < 0)
die_errno("cannot create keep file");
write_or_die(keep_fd, keep_msg, strlen(keep_msg));
if (close(keep_fd))
die_errno("failed to write keep file");
odb_pack_name(&name, pack_data->hash, "pack");
if (finalize_object_file(pack_data->pack_name, name.buf))
die("cannot store pack file");
odb_pack_name(&name, pack_data->hash, "idx");
if (finalize_object_file(curr_index_name, name.buf))
die("cannot store index file");
free((void *)curr_index_name);
return strbuf_detach(&name, NULL);
}
static void unkeep_all_packs(void)
{
struct strbuf name = STRBUF_INIT;
int k;
for (k = 0; k < pack_id; k++) {
struct packed_git *p = all_packs[k];
odb_pack_name(&name, p->hash, "keep");
unlink_or_warn(name.buf);
}
strbuf_release(&name);
}
static int loosen_small_pack(const struct packed_git *p)
{
struct child_process unpack = CHILD_PROCESS_INIT;
if (lseek(p->pack_fd, 0, SEEK_SET) < 0)
die_errno("Failed seeking to start of '%s'", p->pack_name);
unpack.in = p->pack_fd;
unpack.git_cmd = 1;
unpack.stdout_to_stderr = 1;
strvec_push(&unpack.args, "unpack-objects");
if (!show_stats)
strvec_push(&unpack.args, "-q");
return run_command(&unpack);
}
static void end_packfile(void)
{
static int running;
if (running || !pack_data)
return;
running = 1;
clear_delta_base_cache();
if (object_count) {
struct packed_git *new_p;
struct object_id cur_pack_oid;
char *idx_name;
int i;
struct branch *b;
struct tag *t;
close_pack_windows(pack_data);
finalize_hashfile(pack_file, cur_pack_oid.hash, 0);
fixup_pack_header_footer(pack_data->pack_fd, pack_data->hash,
pack_data->pack_name, object_count,
cur_pack_oid.hash, pack_size);
if (object_count <= unpack_limit) {
if (!loosen_small_pack(pack_data)) {
invalidate_pack_id(pack_id);
goto discard_pack;
}
}
close(pack_data->pack_fd);
idx_name = keep_pack(create_index());
/* Register the packfile with core git's machinery. */
new_p = add_packed_git(idx_name, strlen(idx_name), 1);
if (!new_p)
die("core git rejected index %s", idx_name);
all_packs[pack_id] = new_p;
install_packed_git(the_repository, new_p);
free(idx_name);
/* Print the boundary */
if (pack_edges) {
fprintf(pack_edges, "%s:", new_p->pack_name);
for (i = 0; i < branch_table_sz; i++) {
for (b = branch_table[i]; b; b = b->table_next_branch) {
if (b->pack_id == pack_id)
fprintf(pack_edges, " %s",
oid_to_hex(&b->oid));
}
}
for (t = first_tag; t; t = t->next_tag) {
if (t->pack_id == pack_id)
fprintf(pack_edges, " %s",
oid_to_hex(&t->oid));
}
fputc('\n', pack_edges);
fflush(pack_edges);
}
pack_id++;
}
else {
discard_pack:
close(pack_data->pack_fd);
unlink_or_warn(pack_data->pack_name);
}
FREE_AND_NULL(pack_data);
running = 0;
/* We can't carry a delta across packfiles. */
strbuf_release(&last_blob.data);
last_blob.offset = 0;
last_blob.depth = 0;
}
static void cycle_packfile(void)
{
end_packfile();
start_packfile();
}
static int store_object(
enum object_type type,
struct strbuf *dat,
struct last_object *last,
struct object_id *oidout,
uintmax_t mark)
{
void *out, *delta;
struct object_entry *e;
unsigned char hdr[96];
struct object_id oid;
unsigned long hdrlen, deltalen;
git_hash_ctx c;
git_zstream s;
hdrlen = xsnprintf((char *)hdr, sizeof(hdr), "%s %lu",
type_name(type), (unsigned long)dat->len) + 1;
the_hash_algo->init_fn(&c);
the_hash_algo->update_fn(&c, hdr, hdrlen);
the_hash_algo->update_fn(&c, dat->buf, dat->len);
the_hash_algo->final_oid_fn(&oid, &c);
if (oidout)
oidcpy(oidout, &oid);
e = insert_object(&oid);
if (mark)
insert_mark(&marks, mark, e);
if (e->idx.offset) {
duplicate_count_by_type[type]++;
return 1;
} else if (find_sha1_pack(oid.hash,
get_all_packs(the_repository))) {
e->type = type;
e->pack_id = MAX_PACK_ID;
e->idx.offset = 1; /* just not zero! */
duplicate_count_by_type[type]++;
return 1;
}
if (last && last->data.len && last->data.buf && last->depth < max_depth
&& dat->len > the_hash_algo->rawsz) {
delta_count_attempts_by_type[type]++;
delta = diff_delta(last->data.buf, last->data.len,
dat->buf, dat->len,
&deltalen, dat->len - the_hash_algo->rawsz);
} else
delta = NULL;
git_deflate_init(&s, pack_compression_level);
if (delta) {
s.next_in = delta;
s.avail_in = deltalen;
} else {
s.next_in = (void *)dat->buf;
s.avail_in = dat->len;
}
s.avail_out = git_deflate_bound(&s, s.avail_in);
s.next_out = out = xmalloc(s.avail_out);
while (git_deflate(&s, Z_FINISH) == Z_OK)
; /* nothing */
git_deflate_end(&s);
/* Determine if we should auto-checkpoint. */
if ((max_packsize
&& (pack_size + PACK_SIZE_THRESHOLD + s.total_out) > max_packsize)
|| (pack_size + PACK_SIZE_THRESHOLD + s.total_out) < pack_size) {
/* This new object needs to *not* have the current pack_id. */
e->pack_id = pack_id + 1;
cycle_packfile();
/* We cannot carry a delta into the new pack. */
if (delta) {
FREE_AND_NULL(delta);