/* (See Documentation/git-fast-import.txt for maintained documentation.) Format of STDIN stream: stream ::= cmd*; cmd ::= new_blob | new_commit | new_tag | reset_branch | checkpoint | progress ; new_blob ::= 'blob' lf mark? file_content; file_content ::= data; new_commit ::= 'commit' sp ref_str lf mark? ('author' (sp name)? sp '<' email '>' sp when lf)? 'committer' (sp name)? sp '<' email '>' sp when lf commit_msg ('from' sp commit-ish lf)? ('merge' sp commit-ish lf)* (file_change | ls)* lf?; commit_msg ::= data; ls ::= 'ls' sp '"' quoted(path) '"' lf; file_change ::= file_clr | file_del | file_rnm | file_cpy | file_obm | file_inm; file_clr ::= 'deleteall' lf; file_del ::= 'D' sp path_str lf; file_rnm ::= 'R' sp path_str sp path_str lf; file_cpy ::= 'C' sp path_str sp path_str lf; file_obm ::= 'M' sp mode sp (hexsha1 | idnum) sp path_str lf; file_inm ::= 'M' sp mode sp 'inline' sp path_str lf data; note_obm ::= 'N' sp (hexsha1 | idnum) sp commit-ish lf; note_inm ::= 'N' sp 'inline' sp commit-ish lf data; new_tag ::= 'tag' sp tag_str lf 'from' sp commit-ish lf ('tagger' (sp name)? sp '<' email '>' sp when lf)? tag_msg; tag_msg ::= data; reset_branch ::= 'reset' sp ref_str lf ('from' sp commit-ish lf)? lf?; checkpoint ::= 'checkpoint' lf lf?; progress ::= 'progress' sp not_lf* lf lf?; # note: the first idnum in a stream should be 1 and subsequent # idnums should not have gaps between values as this will cause # the stream parser to reserve space for the gapped values. An # idnum can be updated in the future to a new object by issuing # a new mark directive with the old idnum. # mark ::= 'mark' sp idnum lf; data ::= (delimited_data | exact_data) lf?; # note: delim may be any string but must not contain lf. # data_line may contain any data but must not be exactly # delim. delimited_data ::= 'data' sp '<<' delim lf (data_line lf)* delim lf; # note: declen indicates the length of binary_data in bytes. # declen does not include the lf preceding the binary data. # exact_data ::= 'data' sp declen lf binary_data; # note: quoted strings are C-style quoting supporting \c for # common escapes of 'c' (e..g \n, \t, \\, \") or \nnn where nnn # is the signed byte value in octal. Note that the only # characters which must actually be escaped to protect the # stream formatting is: \, " and LF. Otherwise these values # are UTF8. # commit-ish ::= (ref_str | hexsha1 | sha1exp_str | idnum); ref_str ::= ref; sha1exp_str ::= sha1exp; tag_str ::= tag; path_str ::= path | '"' quoted(path) '"' ; mode ::= '100644' | '644' | '100755' | '755' | '120000' ; declen ::= # unsigned 32 bit value, ascii base10 notation; bigint ::= # unsigned integer value, ascii base10 notation; binary_data ::= # file content, not interpreted; when ::= raw_when | rfc2822_when; raw_when ::= ts sp tz; rfc2822_when ::= # Valid RFC 2822 date and time; sp ::= # ASCII space character; lf ::= # ASCII newline (LF) character; # note: a colon (':') must precede the numerical value assigned to # an idnum. This is to distinguish it from a ref or tag name as # GIT does not permit ':' in ref or tag strings. # idnum ::= ':' bigint; path ::= # GIT style file path, e.g. "a/b/c"; ref ::= # GIT ref name, e.g. "refs/heads/MOZ_GECKO_EXPERIMENT"; tag ::= # GIT tag name, e.g. "FIREFOX_1_5"; sha1exp ::= # Any valid GIT SHA1 expression; hexsha1 ::= # SHA1 in hexadecimal format; # note: name and email are UTF8 strings, however name must not # contain '<' or lf and email must not contain any of the # following: '<', '>', lf. # name ::= # valid GIT author/committer name; email ::= # valid GIT author/committer email; ts ::= # time since the epoch in seconds, ascii base10 notation; tz ::= # GIT style timezone; # note: comments, ls and cat requests may appear anywhere # in the input, except within a data command. Any form # of the data command always escapes the related input # from comment processing. # # In case it is not clear, the '#' that starts the comment # must be the first character on that line (an lf # preceded it). # cat_blob ::= 'cat-blob' sp (hexsha1 | idnum) lf; ls_tree ::= 'ls' sp (hexsha1 | idnum) sp path_str lf; comment ::= '#' not_lf* lf; not_lf ::= # Any byte that is not ASCII newline (LF); */ #include "builtin.h" #include "cache.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 "exec_cmd.h" #include "dir.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 struct object_entry { struct pack_idx_entry idx; struct object_entry *next; uint32_t type : TYPE_BITS, pack_id : PACK_ID_BITS, depth : DEPTH_BITS; }; 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_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 mem_pool { struct mem_pool *next_pool; char *next_free; char *end; uintmax_t space[FLEX_ARRAY]; /* more */ }; 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; unsigned char sha1[20]; } 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 pack_id : PACK_ID_BITS; unsigned char sha1[20]; }; struct tag { struct tag *next_tag; const char *name; unsigned int pack_id; unsigned char sha1[20]; }; struct hash_list { struct hash_list *next; unsigned char sha1[20]; }; typedef enum { WHENSPEC_RAW = 1, WHENSPEC_RFC2822, WHENSPEC_NOW } whenspec_type; struct recent_command { struct recent_command *prev; struct recent_command *next; char *buf; }; /* Configured limits on output */ static unsigned long max_depth = 10; static off_t max_packsize; static int force_update; static int pack_compression_level = Z_DEFAULT_COMPRESSION; static int pack_compression_seen; /* 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 char **global_argv; /* Memory pools */ static size_t mem_pool_alloc = 2*1024*1024 - sizeof(struct mem_pool); static size_t total_allocd; static struct mem_pool *mem_pool; /* 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 sha1file *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 object_entry *object_table[1 << 16]; 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 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 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; /* Signal handling */ static volatile sig_atomic_t checkpoint_requested; /* Where to write output of cat-blob commands */ static int cat_blob_fd = STDOUT_FILENO; static void parse_argv(void); static void parse_cat_blob(void); static void parse_ls(struct branch *b); 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_sha1(b->branch_tree.versions[1].sha1)) fputs(" dirty", rpt); fputc('\n', rpt); fprintf(rpt, " tip commit : %s\n", sha1_to_hex(b->sha1)); fprintf(rpt, " old tree : %s\n", sha1_to_hex(b->branch_tree.versions[0].sha1)); fprintf(rpt, " cur tree : %s\n", sha1_to_hex(b->branch_tree.versions[1].sha1)); 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 dump_marks_helper(FILE *, uintmax_t, struct mark_set *); static void write_crash_report(const char *err) { char *loc = git_path("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("can't write crash report %s: %s", loc, strerror(errno)); 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_LOCAL)); 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(sha1_to_hex(tg->sha1), 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 dump_marks_helper(rpt, 0, marks); fputc('\n', rpt); fputs("-------------------\n", rpt); fputs("END OF CRASH REPORT\n", rpt); fclose(rpt); } 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) { static int zombie; char message[2 * PATH_MAX]; vsnprintf(message, sizeof(message), err, params); fputs("fatal: ", stderr); fputs(message, stderr); fputc('\n', stderr); if (!zombie) { zombie = 1; 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(unsigned char *sha1) { struct object_entry *e; if (blocks->next_free == blocks->end) alloc_objects(object_entry_alloc); e = blocks->next_free++; hashcpy(e->idx.sha1, sha1); return e; } static struct object_entry *find_object(unsigned char *sha1) { unsigned int h = sha1[0] << 8 | sha1[1]; struct object_entry *e; for (e = object_table[h]; e; e = e->next) if (!hashcmp(sha1, e->idx.sha1)) return e; return NULL; } static struct object_entry *insert_object(unsigned char *sha1) { unsigned int h = sha1[0] << 8 | sha1[1]; struct object_entry *e = object_table[h]; while (e) { if (!hashcmp(sha1, e->idx.sha1)) return e; e = e->next; } e = new_object(sha1); e->next = object_table[h]; e->idx.offset = 0; object_table[h] = e; return e; } 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 *pool_alloc(size_t len) { struct mem_pool *p; void *r; /* round up to a 'uintmax_t' alignment */ if (len & (sizeof(uintmax_t) - 1)) len += sizeof(uintmax_t) - (len & (sizeof(uintmax_t) - 1)); for (p = mem_pool; p; p = p->next_pool) if ((p->end - p->next_free >= len)) break; if (!p) { if (len >= (mem_pool_alloc/2)) { total_allocd += len; return xmalloc(len); } total_allocd += sizeof(struct mem_pool) + mem_pool_alloc; p = xmalloc(sizeof(struct mem_pool) + mem_pool_alloc); p->next_pool = mem_pool; p->next_free = (char *) p->space; p->end = p->next_free + mem_pool_alloc; mem_pool = p; } r = p->next_free; p->next_free += len; return r; } static void *pool_calloc(size_t count, size_t size) { size_t len = count * size; void *r = pool_alloc(len); memset(r, 0, len); return r; } static char *pool_strdup(const char *s) { char *r = pool_alloc(strlen(s) + 1); strcpy(r, s); return r; } static void insert_mark(uintmax_t idnum, struct object_entry *oe) { struct mark_set *s = marks; while ((idnum >> s->shift) >= 1024) { s = pool_calloc(1, sizeof(struct mark_set)); s->shift = marks->shift + 10; s->data.sets[0] = marks; marks = s; } while (s->shift) { uintmax_t i = idnum >> s->shift; idnum -= i << s->shift; if (!s->data.sets[i]) { s->data.sets[i] = pool_calloc(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 struct object_entry *find_mark(uintmax_t idnum) { uintmax_t orig_idnum = idnum; struct mark_set *s = marks; 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 = pool_alloc(sizeof(struct atom_str) + len + 1); c->str_len = len; strncpy(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 = pool_calloc(1, sizeof(struct branch)); b->name = pool_strdup(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 = pool_alloc(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; memcpy(r->entries,t->entries,t->entry_count*sizeof(t->entries[0])); 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; total_allocd += n * sizeof(struct tree_entry); avail_tree_entry = e = xmalloc(n * sizeof(struct tree_entry)); 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_sha1(b->versions[1].sha1)) 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) { static char tmp_file[PATH_MAX]; struct packed_git *p; struct pack_header hdr; int pack_fd; pack_fd = odb_mkstemp(tmp_file, sizeof(tmp_file), "pack/tmp_pack_XXXXXX"); p = xcalloc(1, sizeof(*p) + strlen(tmp_file) + 2); strcpy(p->pack_name, tmp_file); p->pack_fd = pack_fd; p->do_not_close = 1; pack_file = sha1fd(pack_fd, p->pack_name); hdr.hdr_signature = htonl(PACK_SIGNATURE); hdr.hdr_version = htonl(2); hdr.hdr_entries = 0; sha1write(pack_file, &hdr, sizeof(hdr)); pack_data = p; pack_size = sizeof(hdr); object_count = 0; all_packs = xrealloc(all_packs, sizeof(*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. */ 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->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->sha1); free(idx); return tmpfile; } static char *keep_pack(const char *curr_index_name) { static char name[PATH_MAX]; static const char *keep_msg = "fast-import"; int keep_fd; keep_fd = odb_pack_keep(name, sizeof(name), pack_data->sha1); 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"); snprintf(name, sizeof(name), "%s/pack/pack-%s.pack", get_object_directory(), sha1_to_hex(pack_data->sha1)); if (move_temp_to_file(pack_data->pack_name, name)) die("cannot store pack file"); snprintf(name, sizeof(name), "%s/pack/pack-%s.idx", 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; } static void unkeep_all_packs(void) { static char name[PATH_MAX]; int k; for (k = 0; k < pack_id; k++) { struct packed_git *p = all_packs[k]; snprintf(name, sizeof(name), "%s/pack/pack-%s.keep", get_object_directory(), sha1_to_hex(p->sha1)); unlink_or_warn(name); } } static void end_packfile(void) { struct packed_git *old_p = pack_data, *new_p; clear_delta_base_cache(); if (object_count) { unsigned char cur_pack_sha1[20]; char *idx_name; int i; struct branch *b; struct tag *t; close_pack_windows(pack_data); sha1close(pack_file, cur_pack_sha1, 0); fixup_pack_header_footer(pack_data->pack_fd, pack_data->sha1, pack_data->pack_name, object_count, cur_pack_sha1, pack_size); 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(new_p); /* 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", sha1_to_hex(b->sha1)); } } for (t = first_tag; t; t = t->next_tag) { if (t->pack_id == pack_id) fprintf(pack_edges, " %s", sha1_to_hex(t->sha1)); } fputc('\n', pack_edges); fflush(pack_edges); } pack_id++; } else { close(old_p->pack_fd); unlink_or_warn(old_p->pack_name); } free(old_p); /* 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, unsigned char *sha1out, uintmax_t mark) { void *out, *delta; struct object_entry *e; unsigned char hdr[96]; unsigned char sha1[20]; unsigned long hdrlen, deltalen; git_SHA_CTX c; git_zstream s; hdrlen = sprintf((char *)hdr,"%s %lu", typename(type), (unsigned long)dat->len) + 1; git_SHA1_Init(&c); git_SHA1_Update(&c, hdr, hdrlen); git_SHA1_Update(&c, dat->buf, dat->len); git_SHA1_Final(sha1, &c); if (sha1out) hashcpy(sha1out, sha1); e = insert_object(sha1); if (mark) insert_mark(mark, e); if (e->idx.offset) { duplicate_count_by_type[type]++; return 1; } else if (find_sha1_pack(sha1, packed_git)) { 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.buf && last->depth < max_depth && dat->len > 20) { delta_count_attempts_by_type[type]++; delta = diff_delta(last->data.buf, last->data.len, dat->buf, dat->len, &deltalen, dat->len - 20); } else delta = NULL; memset(&s, 0, sizeof(s)); 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 + 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. */ e->pack_id = pack_id + 1; cycle_packfile(); /* We cannot carry a delta into the new pack. */ if (delta) { free(delta); delta = NULL; memset(&s, 0, sizeof(s)); git_deflate_init(&s, pack_compression_level); 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 = xrealloc(out, s.avail_out); while (git_deflate(&s, Z_FINISH) == Z_OK) ; /* nothing */ git_deflate_end(&s); } } e->type = type; e->pack_id = pack_id; e->idx.offset = pack_size; object_count++; object_count_by_type[type]++; crc32_begin(pack_file); if (delta) { off_t ofs = e->idx.offset - last->offset; unsigned pos = sizeof(hdr) - 1; delta_count_by_type[type]++; e->depth = last->depth + 1; hdrlen = encode_in_pack_object_header(OBJ_OFS_DELTA, deltalen, hdr); sha1write(pack_file, hdr, hdrlen); pack_size += hdrlen; hdr[pos] = ofs & 127; while (ofs >>= 7) hdr[--pos] = 128 | (--ofs & 127); sha1write(pack_file, hdr + pos, sizeof(hdr) - pos); pack_size += sizeof(hdr) - pos; } else { e->depth = 0; hdrlen = encode_in_pack_object_header(type, dat->len, hdr); sha1write(pack_file, hdr, hdrlen); pack_size += hdrlen; } 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) { if (last->no_swap) { last->data = *dat; } else { strbuf_swap(&last->data, dat); } last->offset = e->idx.offset; last->depth = e->depth; } return 0; } static void truncate_pack(struct sha1file_checkpoint *checkpoint) { if (sha1file_truncate(pack_file, checkpoint)) die_errno("cannot truncate pack to skip duplicate"); pack_size = checkpoint->offset; } static void stream_blob(uintmax_t len, unsigned char *sha1out, uintmax_t mark) { size_t in_sz = 64 * 1024, out_sz = 64 * 1024; unsigned char *in_buf = xmalloc(in_sz); unsigned char *out_buf = xmalloc(out_sz); struct object_entry *e; unsigned char sha1[20]; unsigned long hdrlen; off_t offset; git_SHA_CTX c; git_zstream s; struct sha1file_checkpoint checkpoint; int status = Z_OK; /* Determine if we should auto-checkpoint. */ if ((max_packsize && (pack_size + 60 + len) > max_packsize) || (pack_size + 60 + len) < pack_size) cycle_packfile(); sha1file_checkpoint(pack_file, &checkpoint); offset = checkpoint.offset; hdrlen = snprintf((char *)out_buf, out_sz, "blob %" PRIuMAX, len) + 1; if (out_sz <= hdrlen) die("impossibly large object header"); git_SHA1_Init(&c); git_SHA1_Update(&c, out_buf, hdrlen); crc32_begin(pack_file); memset(&s, 0, sizeof(s)); git_deflate_init(&s, pack_compression_level); hdrlen = encode_in_pack_object_header(OBJ_BLOB, len, out_buf); if (out_sz <= hdrlen) die("impossibly large object header"); s.next_out = out_buf + hdrlen; s.avail_out = out_sz - hdrlen; while (status != Z_STREAM_END) { if (0 < len && !s.avail_in) { size_t cnt = in_sz < len ? in_sz : (size_t)len; size_t n = fread(in_buf, 1, cnt, stdin); if (!n && feof(stdin)) die("EOF in data (%" PRIuMAX " bytes remaining)", len); git_SHA1_Update(&c, in_buf, n); s.next_in = in_buf; s.avail_in = n; len -= n; } status = git_deflate(&s, len ? 0 : Z_FINISH); if (!s.avail_out || status == Z_STREAM_END) { size_t n = s.next_out - out_buf; sha1write(pack_file, out_buf, n); pack_size += n; s.next_out = out_buf; s.avail_out = out_sz; } switch (status) { case Z_OK: case Z_BUF_ERROR: case Z_STREAM_END: continue; default: die("unexpected deflate failure: %d", status); } } git_deflate_end(&s); git_SHA1_Final(sha1, &c); if (sha1out) hashcpy(sha1out, sha1); e = insert_object(sha1); if (mark) insert_mark(mark, e); if (e->idx.offset) { duplicate_count_by_type[OBJ_BLOB]++; truncate_pack(&checkpoint); } else if (find_sha1_pack(sha1, packed_git)) { e->type = OBJ_BLOB; e->pack_id = MAX_PACK_ID; e->idx.offset = 1; /* just not zero! */ duplicate_count_by_type[OBJ_BLOB]++; truncate_pack(&checkpoint); } else { e->depth = 0; 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]++; } free(in_buf); free(out_buf); } /* All calls must be guarded by find_object() or find_mark() to * ensure the 'struct object_entry' passed was written by this * process instance. We unpack the entry by the offset, avoiding * the need for the corresponding .idx file. This unpacking rule * works because we only use OBJ_REF_DELTA within the packfiles * created by fast-import. * * oe must not be NULL. Such an oe usually comes from giving * an unknown SHA-1 to find_object() or an undefined mark to * find_mark(). Callers must test for this condition and use * the standard read_sha1_file() when it happens. * * oe->pack_id must not be MAX_PACK_ID. Such an oe is usually from * find_mark(), where the mark was reloaded from an existing marks * file and is referencing an object that this fast-import process * instance did not write out to a packfile. Callers must test for * this condition and use read_sha1_file() instead. */ static void *gfi_unpack_entry( struct object_entry *oe, unsigned long *sizep) { enum object_type type; struct packed_git *p = all_packs[oe->pack_id]; if (p == pack_data && p->pack_size < (pack_size + 20)) { /* The object is stored in the packfile we are writing to * and we have modified it since the last time we scanned * back to read a previously written object. If an old * window covered [p->pack_size, p->pack_size + 20) its * data is stale and is not valid. Closing all windows * and updating the packfile length ensures we can read * the newly written data. */ close_pack_windows(p); sha1flush(pack_file); /* We have to offer 20 bytes additional on the end of * the packfile as the core unpacker code assumes the * footer is present at the file end and must promise * at least 20 bytes within any window it maps. But * we don't actually create the footer here. */ p->pack_size = pack_size + 20; } return unpack_entry(p, oe->idx.offset, &type, sizep); } static const char *get_mode(const char *str, uint16_t *modep) { unsigned char c; uint16_t mode = 0; while ((c = *str++) != ' ') { if (c < '0' || c > '7') return NULL; mode = (mode << 3) + (c - '0'); } *modep = mode; return str; } static void load_tree(struct tree_entry *root) { unsigned char *sha1 = root->versions[1].sha1; struct object_entry *myoe; struct tree_content *t; unsigned long size; char *buf; const char *c; root->tree = t = new_tree_content(8); if (is_null_sha1(sha1)) return; myoe = find_object(sha1); if (myoe && myoe->pack_id != MAX_PACK_ID) { if (myoe->type != OBJ_TREE) die("Not a tree: %s", sha1_to_hex(sha1)); t->delta_depth = myoe->depth; buf = gfi_unpack_entry(myoe, &size); if (!buf) die("Can't load tree %s", sha1_to_hex(sha1)); } else { enum object_type type; buf = read_sha1_file(sha1, &type, &size); if (!buf || type != OBJ_TREE) die("Can't load tree %s", sha1_to_hex(sha1)); } c = buf; while (c != (buf + size)) { struct tree_entry *e = new_tree_entry(); if (t->entry_count == t->entry_capacity) root->tree = t = grow_tree_content(t, t->entry_count); t->entries[t->entry_count++] = e; e->tree = NULL; c = get_mode(c, &e->versions[1].mode); if (!c) die("Corrupt mode in %s", sha1_to_hex(sha1)); e->versions[0].mode = e->versions[1].mode; e->name = to_atom(c, strlen(c)); c += e->name->str_len + 1; hashcpy(e->versions[0].sha1, (unsigned char *)c); hashcpy(e->versions[1].sha1, (unsigned char *)c); c += 20; } free(buf); } static int tecmp0 (const void *_a, const void *_b) { struct tree_entry *a = *((struct tree_entry**)_a); struct tree_entry *b = *((struct tree_entry**)_b); return base_name_compare( a->name->str_dat, a->name->str_len, a->versions[0].mode, b->name->str_dat, b->name->str_len, b->versions[0].mode); } static int tecmp1 (const void *_a, const void *_b) { struct tree_entry *a = *((struct tree_entry**)_a); struct tree_entry *b = *((struct tree_entry**)_b); return base_name_compare( a->name->str_dat, a->name->str_len, a->versions[1].mode, b->name->str_dat, b->name->str_len, b->versions[1].mode); } static void mktree(struct tree_content *t, int v, struct strbuf *b) { size_t maxlen = 0; unsigned int i; if (!v) qsort(t->entries,t->entry_count,sizeof(t->entries[0]),tecmp0); else qsort(t->entries,t->entry_count,sizeof(t->entries[0]),tecmp1); for (i = 0; i < t->entry_count; i++) { if (t->entries[i]->versions[v].mode) maxlen += t->entries[i]->name->str_len + 34; } strbuf_reset(b); strbuf_grow(b, maxlen); for (i = 0; i < t->entry_count; i++) { struct tree_entry *e = t->entries[i]; if (!e->versions[v].mode) continue; strbuf_addf(b, "%o %s%c", (unsigned int)(e->versions[v].mode & ~NO_DELTA), e->name->str_dat, '\0'); strbuf_add(b, e->versions[v].sha1, 20); } } static void store_tree(struct tree_entry *root) { struct tree_content *t = root->tree; unsigned int i, j, del; struct last_object lo = { STRBUF_INIT, 0, 0, /* no_swap */ 1 }; struct object_entry *le = NULL; if (!is_null_sha1(root->versions[1].sha1)) return; for (i = 0; i < t->entry_count; i++) { if (t->entries[i]->tree) store_tree(t->entries[i]); } if (!(root->versions[0].mode & NO_DELTA)) le = find_object(root->versions[0].sha1); if (S_ISDIR(root->versions[0].mode) && le && le->pack_id == pack_id) { mktree(t, 0, &old_tree); lo.data = old_tree; lo.offset = le->idx.offset; lo.depth = t->delta_depth; } mktree(t, 1, &new_tree); store_object(OBJ_TREE, &new_tree, &lo, root->versions[1].sha1, 0); t->delta_depth = lo.depth; for (i = 0, j = 0, del = 0; i < t->entry_count; i++) { struct tree_entry *e = t->entries[i]; if (e->versions[1].mode) { e->versions[0].mode = e->versions[1].mode; hashcpy(e->versions[0].sha1, e->versions[1].sha1); t->entries[j++] = e; } else { release_tree_entry(e); del++; } } t->entry_count -= del; } static void tree_content_replace( struct tree_entry *root, const unsigned char *sha1, const uint16_t mode, struct tree_content *newtree) { if (!S_ISDIR(mode)) die("Root cannot be a non-directory"); hashclr(root->versions[0].sha1); hashcpy(root->versions[1].sha1, sha1); if (root->tree) release_tree_content_recursive(root->tree); root->tree = newtree; } static int tree_content_set( struct tree_entry *root, const char *p, const unsigned char *sha1, const uint16_t mode, struct tree_content *subtree) { struct tree_content *t; const char *slash1; unsigned int i, n; struct tree_entry *e; slash1 = strchr(p, '/'); if (slash1) n = slash1 - p; else n = strlen(p); if (!n) die("Empty path component found in input"); if (!slash1 && !S_ISDIR(mode) && subtree) die("Non-directories cannot have subtrees"); if (!root->tree) load_tree(root); t = root->tree; for (i = 0; i < t->entry_count; i++) { e = t->entries[i]; if (e->name->str_len == n && !strncmp_icase(p, e->name->str_dat, n)) { if (!slash1) { if (!S_ISDIR(mode) && e->versions[1].mode == mode && !hashcmp(e->versions[1].sha1, sha1)) return 0; e->versions[1].mode = mode; hashcpy(e->versions[1].sha1, sha1); if (e->tree) release_tree_content_recursive(e->tree); e->tree = subtree; /* * We need to leave e->versions[0].sha1 alone * to avoid modifying the preimage tree used * when writing out the parent directory. * But after replacing the subdir with a * completely different one, it's not a good * delta base any more, and besides, we've * thrown away the tree entries needed to * make a delta against it. * * So let's just explicitly disable deltas * for the subtree. */ if (S_ISDIR(e->versions[0].mode)) e->versions[0].mode |= NO_DELTA; hashclr(root->versions[1].sha1); return 1; } if (!S_ISDIR(e->versions[1].mode)) { e->tree = new_tree_content(8); e->versions[1].mode = S_IFDIR; } if (!e->tree) load_tree(e); if (tree_content_set(e, slash1 + 1, sha1, mode, subtree)) { hashclr(root->versions[1].sha1); return 1; } return 0; } } if (t->entry_count == t->entry_capacity) root->tree = t = grow_tree_content(t, t->entry_count); e = new_tree_entry(); e->name = to_atom(p, n); e->versions[0].mode = 0; hashclr(e->versions[0].sha1); t->entries[t->entry_count++] = e; if (slash1) { e->tree = new_tree_content(8); e->versions[1].mode = S_IFDIR; tree_content_set(e, slash1 + 1, sha1, mode, subtree); } else { e->tree = subtree; e->versions[1].mode = mode; hashcpy(e->versions[1].sha1, sha1); } hashclr(root->versions[1].sha1); return 1; } static int tree_content_remove( struct tree_entry *root, const char *p, struct tree_entry *backup_leaf, int allow_root) { struct tree_content *t; const char *slash1; unsigned int i, n; struct tree_entry *e; slash1 = strchr(p, '/'); if (slash1) n = slash1 - p; else n = strlen(p); if (!root->tree) load_tree(root); if (!*p && allow_root) { e = root; goto del_entry; } t = root->tree; for (i = 0; i < t->entry_count; i++) { e = t->entries[i]; if (e->name->str_len == n && !strncmp_icase(p, e->name->str_dat, n)) { if (slash1 && !S_ISDIR(e->versions[1].mode)) /* * If p names a file in some subdirectory, and a * file or symlink matching the name of the * parent directory of p exists, then p cannot * exist and need not be deleted. */ return 1; if (!slash1 || !S_ISDIR(e->versions[1].mode)) goto del_entry; if (!e->tree) load_tree(e); if (tree_content_remove(e, slash1 + 1, backup_leaf, 0)) { for (n = 0; n < e->tree->entry_count; n++) { if (e->tree->entries[n]->versions[1].mode) { hashclr(root->versions[1].sha1); return 1; } } backup_leaf = NULL; goto del_entry; } return 0; } } return 0; del_entry: if (backup_leaf) memcpy(backup_leaf, e, sizeof(*backup_leaf)); else if (e->tree) release_tree_content_recursive(e->tree); e->tree = NULL; e->versions[1].mode = 0; hashclr(e->versions[1].sha1); hashclr(root->versions[1].sha1); return 1; } static int tree_content_get( struct tree_entry *root, const char *p, struct tree_entry *leaf, int allow_root) { struct tree_content *t; const char *slash1; unsigned int i, n; struct tree_entry *e; slash1 = strchr(p, '/'); if (slash1) n = slash1 - p; else n = strlen(p); if (!n && !allow_root) die("Empty path component found in input"); if (!root->tree) load_tree(root); if (!n) { e = root; goto found_entry; } t = root->tree; for (i = 0; i < t->entry_count; i++) { e = t->entries[i]; if (e->name->str_len == n && !strncmp_icase(p, e->name->str_dat, n)) { if (!slash1) goto found_entry; if (!S_ISDIR(e->versions[1].mode)) return 0; if (!e->tree) load_tree(e); return tree_content_get(e, slash1 + 1, leaf, 0); } } return 0; found_entry: memcpy(leaf, e, sizeof(*leaf)); if (e->tree && is_null_sha1(e->versions[1].sha1)) leaf->tree = dup_tree_content(e->tree); else leaf->tree = NULL; return 1; } static int update_branch(struct branch *b) { static const char *msg = "fast-import"; struct ref_lock *lock; unsigned char old_sha1[20]; if (is_null_sha1(b->sha1)) return 0; if (read_ref(b->name, old_sha1)) hashclr(old_sha1); lock = lock_any_ref_for_update(b->name, old_sha1, 0, NULL); if (!lock) return error("Unable to lock %s", b->name); if (!force_update && !is_null_sha1(old_sha1)) { struct commit *old_cmit, *new_cmit; old_cmit = lookup_commit_reference_gently(old_sha1, 0); new_cmit = lookup_commit_reference_gently(b->sha1, 0); if (!old_cmit || !new_cmit) { unlock_ref(lock); return error("Branch %s is missing commits.", b->name); } if (!in_merge_bases(old_cmit, new_cmit)) { unlock_ref(lock); warning("Not updating %s" " (new tip %s does not contain %s)", b->name, sha1_to_hex(b->sha1), sha1_to_hex(old_sha1)); return -1; } } if (write_ref_sha1(lock, b->sha1, msg) < 0) return error("Unable to update %s", b->name); return 0; } static void dump_branches(void) { unsigned int i; struct branch *b; for (i = 0; i < branch_table_sz; i++) { for (b = branch_table[i]; b; b = b->table_next_branch) failure |= update_branch(b); } } static void dump_tags(void) { static const char *msg = "fast-import"; struct tag *t; struct ref_lock *lock; char ref_name[PATH_MAX]; for (t = first_tag; t; t = t->next_tag) { sprintf(ref_name, "tags/%s", t->name); lock = lock_ref_sha1(ref_name, NULL); if (!lock || write_ref_sha1(lock, t->sha1, msg) < 0) failure |= error("Unable to update %s", ref_name); } } static void dump_marks_helper(FILE *f, uintmax_t base, struct mark_set *m) { uintmax_t k; if (m->shift) { for (k = 0; k < 1024; k++) { if (m->data.sets[k]) dump_marks_helper(f, base + (k << m->shift), m->data.sets[k]); } } else { for (k = 0; k < 1024; k++) { if (m->data.marked[k]) fprintf(f, ":%" PRIuMAX " %s\n", base + k, sha1_to_hex(m->data.marked[k]->idx.sha1)); } } } static void dump_marks(void) { static struct lock_file mark_lock; int mark_fd; FILE *f; if (!export_marks_file) return; mark_fd = hold_lock_file_for_update(&mark_lock, export_marks_file, 0); if (mark_fd < 0) { failure |= error("Unable to write marks file %s: %s", export_marks_file, strerror(errno)); return; } f = fdopen(mark_fd, "w"); if (!f) { int saved_errno = errno; rollback_lock_file(&mark_lock); failure |= error("Unable to write marks file %s: %s", export_marks_file, strerror(saved_errno)); return; } /* * Since the lock file was fdopen()'ed, it should not be close()'ed. * Assign -1 to the lock file descriptor so that commit_lock_file() * won't try to close() it. */ mark_lock.fd = -1; dump_marks_helper(f, 0, marks); if (ferror(f) || fclose(f)) { int saved_errno = errno; rollback_lock_file(&mark_lock); failure |= error("Unable to write marks file %s: %s", export_marks_file, strerror(saved_errno)); return; } if (commit_lock_file(&mark_lock)) { int saved_errno = errno; rollback_lock_file(&mark_lock); failure |= error("Unable to commit marks file %s: %s", export_marks_file, strerror(saved_errno)); return; } } static void read_marks(void) { char line[512]; FILE *f = fopen(import_marks_file, "r"); if (f) ; else if (import_marks_file_ignore_missing && errno == ENOENT) return; /* Marks file does not exist */ else die_errno("cannot read '%s'", import_marks_file); while (fgets(line, sizeof(line), f)) { uintmax_t mark; char *end; unsigned char sha1[20]; struct object_entry *e; end = strchr(line, '\n'); if (line[0] != ':' || !end) die("corrupt mark line: %s", line); *end = 0; mark = strtoumax(line + 1, &end, 10); if (!mark || end == line + 1 || *end != ' ' || get_sha1_hex(end + 1, sha1)) die("corrupt mark line: %s", line); e = find_object(sha1); if (!e) { enum object_type type = sha1_object_info(sha1, NULL); if (type < 0) die("object not found: %s", sha1_to_hex(sha1)); e = insert_object(sha1); e->type = type; e->pack_id = MAX_PACK_ID; e->idx.offset = 1; /* just not zero! */ } insert_mark(mark, e); } fclose(f); } static int read_next_command(void) { static int stdin_eof = 0; if (stdin_eof) { unread_command_buf = 0; return EOF; } for (;;) { if (unread_command_buf) { unread_command_buf = 0; } else { struct recent_command *rc; strbuf_detach(&command_buf, NULL); stdin_eof = strbuf_getline(&command_buf, stdin, '\n'); if (stdin_eof) return EOF; if (!seen_data_command && !starts_with(command_buf.buf, "feature ") && !starts_with(command_buf.buf, "option ")) { parse_argv(); } rc = rc_free; if (rc) rc_free = rc->next; else { rc = cmd_hist.next; cmd_hist.next = rc->next; cmd_hist.next->prev = &cmd_hist; free(rc->buf); } rc->buf = command_buf.buf; rc->prev = cmd_tail; rc->next = cmd_hist.prev; rc->prev->next = rc; cmd_tail = rc; } if (starts_with(command_buf.buf, "cat-blob ")) { parse_cat_blob(); continue; } if (command_buf.buf[0] == '#') continue; return 0; } } static void skip_optional_lf(void) { int term_char = fgetc(stdin); if (term_char != '\n' && term_char != EOF) ungetc(term_char, stdin); } static void parse_mark(void) { if (starts_with(command_buf.buf, "mark :")) { next_mark = strtoumax(command_buf.buf + 6, NULL, 10); read_next_command(); } else next_mark = 0; } static int parse_data(struct strbuf *sb, uintmax_t limit, uintmax_t *len_res) { strbuf_reset(sb); if (!starts_with(command_buf.buf, "data ")) die("Expected 'data n' command, found: %s", command_buf.buf); if (starts_with(command_buf.buf + 5, "<<")) { char *term = xstrdup(command_buf.buf + 5 + 2); size_t term_len = command_buf.len - 5 - 2; strbuf_detach(&command_buf, NULL); for (;;) { if (strbuf_getline(&command_buf, stdin, '\n') == EOF) die("EOF in data (terminator '%s' not found)", term); if (term_len == command_buf.len && !strcmp(term, command_buf.buf)) break; strbuf_addbuf(sb, &command_buf); strbuf_addch(sb, '\n'); } free(term); } else { uintmax_t len = strtoumax(command_buf.buf + 5, NULL, 10); size_t n = 0, length = (size_t)len; if (limit && limit < len) { *len_res = len; return 0; } if (length < len) die("data is too large to use in this context"); while (n < length) { size_t s = strbuf_fread(sb, length - n, stdin); if (!s && feof(stdin)) die("EOF in data (%lu bytes remaining)", (unsigned long)(length - n)); n += s; } } skip_optional_lf(); return 1; } static int validate_raw_date(const char *src, char *result, int maxlen) { const char *orig_src = src; char *endp; unsigned long num; errno = 0; num = strtoul(src, &endp, 10); /* NEEDSWORK: perhaps check for reasonable values? */ if (errno || endp == src || *endp != ' ') return -1; src = endp + 1; if (*src != '-' && *src != '+') return -1; num = strtoul(src + 1, &endp, 10); if (errno || endp == src + 1 || *endp || (endp - orig_src) >= maxlen || 1400 < num) return -1; strcpy(result, orig_src); return 0; } static char *parse_ident(const char *buf) { const char *ltgt; size_t name_len; char *ident; /* ensure there is a space delimiter even if there is no name */ if (*buf == '<') --buf; ltgt = buf + strcspn(buf, "<>"); if (*ltgt != '<') die("Missing < in ident string: %s", buf); if (ltgt != buf && ltgt[-1] != ' ') die("Missing space before < in ident string: %s", buf); ltgt = ltgt + 1 + strcspn(ltgt + 1, "<>"); if (*ltgt != '>') die("Missing > in ident string: %s", buf); ltgt++; if (*ltgt != ' ') die("Missing space after > in ident string: %s", buf); ltgt++; name_len = ltgt - buf; ident = xmalloc(name_len + 24); strncpy(ident, buf, name_len); switch (whenspec) { case WHENSPEC_RAW: if (validate_raw_date(ltgt, ident + name_len, 24) < 0) die("Invalid raw date \"%s\" in ident: %s", ltgt, buf); break; case WHENSPEC_RFC2822: if (parse_date(ltgt, ident + name_len, 24) < 0) die("Invalid rfc2822 date \"%s\" in ident: %s", ltgt, buf); break; case WHENSPEC_NOW: if (strcmp("now", ltgt)) die("Date in ident must be 'now': %s", buf); datestamp(ident + name_len, 24); break; } return ident; } static void parse_and_store_blob( struct last_object *last, unsigned char *sha1out, uintmax_t mark) { static struct strbuf buf = STRBUF_INIT; uintmax_t len; if (parse_data(&buf, big_file_threshold, &len)) store_object(OBJ_BLOB, &buf, last, sha1out, mark); else { if (last) { strbuf_release(&last->data); last->offset = 0; last->depth = 0; } stream_blob(len, sha1out, mark); skip_optional_lf(); } } static void parse_new_blob(void) { read_next_command(); parse_mark(); parse_and_store_blob(&last_blob, NULL, next_mark); } static void unload_one_branch(void) { while (cur_active_branches && cur_active_branches >= max_active_branches) { uintmax_t min_commit = ULONG_MAX; struct branch *e, *l = NULL, *p = NULL; for (e = active_branches; e; e = e->active_next_branch) { if (e->last_commit < min_commit) { p = l; min_commit = e->last_commit; } l = e; } if (p) { e = p->active_next_branch; p->active_next_branch = e->active_next_branch; } else { e = active_branches; active_branches = e->active_next_branch; } e->active = 0; e->active_next_branch = NULL; if (e->branch_tree.tree) { release_tree_content_recursive(e->branch_tree.tree); e->branch_tree.tree = NULL; } cur_active_branches--; } } static void load_branch(struct branch *b) { load_tree(&b->branch_tree); if (!b->active) { b->active = 1; b->active_next_branch = active_branches; active_branches = b; cur_active_branches++; branch_load_count++; } } static unsigned char convert_num_notes_to_fanout(uintmax_t num_notes) { unsigned char fanout = 0; while ((num_notes >>= 8)) fanout++; return fanout; } static void construct_path_with_fanout(const char *hex_sha1, unsigned char fanout, char *path) { unsigned int i = 0, j = 0; if (fanout >= 20) die("Too large fanout (%u)", fanout); while (fanout) { path[i++] = hex_sha1[j++]; path[i++] = hex_sha1[j++]; path[i++] = '/'; fanout--; } memcpy(path + i, hex_sha1 + j, 40 - j); path[i + 40 - j] = '\0'; } static uintmax_t do_change_note_fanout( struct tree_entry *orig_root, struct tree_entry *root, char *hex_sha1, unsigned int hex_sha1_len, char *fullpath, unsigned int fullpath_len, unsigned char fanout) { struct tree_content *t = root->tree; struct tree_entry *e, leaf; unsigned int i, tmp_hex_sha1_len, tmp_fullpath_len; uintmax_t num_notes = 0; unsigned char sha1[20]; char realpath[60]; for (i = 0; t && i < t->entry_count; i++) { e = t->entries[i]; tmp_hex_sha1_len = hex_sha1_len + e->name->str_len; tmp_fullpath_len = fullpath_len; /* * We're interested in EITHER existing note entries (entries * with exactly 40 hex chars in path, not including directory * separators), OR directory entries that may contain note * entries (with < 40 hex chars in path). * Also, each path component in a note entry must be a multiple * of 2 chars. */ if (!e->versions[1].mode || tmp_hex_sha1_len > 40 || e->name->str_len % 2) continue; /* This _may_ be a note entry, or a subdir containing notes */ memcpy(hex_sha1 + hex_sha1_len, e->name->str_dat, e->name->str_len); if (tmp_fullpath_len) fullpath[tmp_fullpath_len++] = '/'; memcpy(fullpath + tmp_fullpath_len, e->name->str_dat, e->name->str_len); tmp_fullpath_len += e->name->str_len; fullpath[tmp_fullpath_len] = '\0'; if (tmp_hex_sha1_len == 40 && !get_sha1_hex(hex_sha1, sha1)) { /* This is a note entry */ if (fanout == 0xff) { /* Counting mode, no rename */ num_notes++; continue; } construct_path_with_fanout(hex_sha1, fanout, realpath); if (!strcmp(fullpath, realpath)) { /* Note entry is in correct location */ num_notes++; continue; } /* Rename fullpath to realpath */ if (!tree_content_remove(orig_root, fullpath, &leaf, 0)) die("Failed to remove path %s", fullpath); tree_content_set(orig_root, realpath, leaf.versions[1].sha1, leaf.versions[1].mode, leaf.tree); } else if (S_ISDIR(e->versions[1].mode)) { /* This is a subdir that may contain note entries */ if (!e->tree) load_tree(e); num_notes += do_change_note_fanout(orig_root, e, hex_sha1, tmp_hex_sha1_len, fullpath, tmp_fullpath_len, fanout); } /* The above may have reallocated the current tree_content */ t = root->tree; } return num_notes; } static uintmax_t change_note_fanout(struct tree_entry *root, unsigned char fanout) { char hex_sha1[40], path[60]; return do_change_note_fanout(root, root, hex_sha1, 0, path, 0, fanout); } /* * Given a pointer into a string, parse a mark reference: * * idnum ::= ':' bigint; * * Return the first character after the value in *endptr. * * Complain if the following character is not what is expected, * either a space or end of the string. */ static uintmax_t parse_mark_ref(const char *p, char **endptr) { uintmax_t mark; assert(*p == ':'); p++; mark = strtoumax(p, endptr, 10); if (*endptr == p) die("No value after ':' in mark: %s", command_buf.buf); return mark; } /* * Parse the mark reference, and complain if this is not the end of * the string. */ static uintmax_t parse_mark_ref_eol(const char *p) { char *end; uintmax_t mark; mark = parse_mark_ref(p, &end); if (*end != '\0') die("Garbage after mark: %s", command_buf.buf); return mark; } /* * Parse the mark reference, demanding a trailing space. Return a * pointer to the space. */ static uintmax_t parse_mark_ref_space(const char **p) { uintmax_t mark; char *end; mark = parse_mark_ref(*p, &end); if (*end != ' ') die("Missing space after mark: %s", command_buf.buf); *p = end; return mark; } static void file_change_m(struct branch *b) { const char *p = command_buf.buf + 2; static struct strbuf uq = STRBUF_INIT; const char *endp; struct object_entry *oe; unsigned char sha1[20]; uint16_t mode, inline_data = 0; p = get_mode(p, &mode); if (!p) die("Corrupt mode: %s", command_buf.buf); switch (mode) { case 0644: case 0755: mode |= S_IFREG; case S_IFREG | 0644: case S_IFREG | 0755: case S_IFLNK: case S_IFDIR: case S_IFGITLINK: /* ok */ break; default: die("Corrupt mode: %s", command_buf.buf); } if (*p == ':') { oe = find_mark(parse_mark_ref_space(&p)); hashcpy(sha1, oe->idx.sha1); } else if (starts_with(p, "inline ")) { inline_data = 1; oe = NULL; /* not used with inline_data, but makes gcc happy */ p += strlen("inline"); /* advance to space */ } else { if (get_sha1_hex(p, sha1)) die("Invalid dataref: %s", command_buf.buf); oe = find_object(sha1); p += 40; if (*p != ' ') die("Missing space after SHA1: %s", command_buf.buf); } assert(*p == ' '); p++; /* skip space */ strbuf_reset(&uq); if (!unquote_c_style(&uq, p, &endp)) { if (*endp) die("Garbage after path in: %s", command_buf.buf); p = uq.buf; } /* Git does not track empty, non-toplevel directories. */ if (S_ISDIR(mode) && !memcmp(sha1, EMPTY_TREE_SHA1_BIN, 20) && *p) { tree_content_remove(&b->branch_tree, p, NULL, 0); return; } if (S_ISGITLINK(mode)) { if (inline_data) die("Git links cannot be specified 'inline': %s", command_buf.buf); else if (oe) { if (oe->type != OBJ_COMMIT) die("Not a commit (actually a %s): %s", typename(oe->type), command_buf.buf); } /* * Accept the sha1 without checking; it expected to be in * another repository. */ } else if (inline_data) { if (S_ISDIR(mode)) die("Directories cannot be specified 'inline': %s", command_buf.buf); if (p != uq.buf) { strbuf_addstr(&uq, p); p = uq.buf; } read_next_command(); parse_and_store_blob(&last_blob, sha1, 0); } else { enum object_type expected = S_ISDIR(mode) ? OBJ_TREE: OBJ_BLOB; enum object_type type = oe ? oe->type : sha1_object_info(sha1, NULL); if (type < 0) die("%s not found: %s", S_ISDIR(mode) ? "Tree" : "Blob", command_buf.buf); if (type != expected) die("Not a %s (actually a %s): %s", typename(expected), typename(type), command_buf.buf); } if (!*p) { tree_content_replace(&b->branch_tree, sha1, mode, NULL); return; } tree_content_set(&b->branch_tree, p, sha1, mode, NULL); } static void file_change_d(struct branch *b) { const char *p = command_buf.buf + 2; static struct strbuf uq = STRBUF_INIT; const char *endp; strbuf_reset(&uq); if (!unquote_c_style(&uq, p, &endp)) { if (*endp) die("Garbage after path in: %s", command_buf.buf); p = uq.buf; } tree_content_remove(&b->branch_tree, p, NULL, 1); } static void file_change_cr(struct branch *b, int rename) { const char *s, *d; static struct strbuf s_uq = STRBUF_INIT; static struct strbuf d_uq = STRBUF_INIT; const char *endp; struct tree_entry leaf; s = command_buf.buf + 2; strbuf_reset(&s_uq); if (!unquote_c_style(&s_uq, s, &endp)) { if (*endp != ' ') die("Missing space after source: %s", command_buf.buf); } else { endp = strchr(s, ' '); if (!endp) die("Missing space after source: %s", command_buf.buf); strbuf_add(&s_uq, s, endp - s); } s = s_uq.buf; endp++; if (!*endp) die("Missing dest: %s", command_buf.buf); d = endp; strbuf_reset(&d_uq); if (!unquote_c_style(&d_uq, d, &endp)) { if (*endp) die("Garbage after dest in: %s", command_buf.buf); d = d_uq.buf; } memset(&leaf, 0, sizeof(leaf)); if (rename) tree_content_remove(&b->branch_tree, s, &leaf, 1); else tree_content_get(&b->branch_tree, s, &leaf, 1); if (!leaf.versions[1].mode) die("Path %s not in branch", s); if (!*d) { /* C "path/to/subdir" "" */ tree_content_replace(&b->branch_tree, leaf.versions[1].sha1, leaf.versions[1].mode, leaf.tree); return; } tree_content_set(&b->branch_tree, d, leaf.versions[1].sha1, leaf.versions[1].mode, leaf.tree); } static void note_change_n(struct branch *b, unsigned char *old_fanout) { const char *p = command_buf.buf + 2; static struct strbuf uq = STRBUF_INIT; struct object_entry *oe; struct branch *s; unsigned char sha1[20], commit_sha1[20]; char path[60]; uint16_t inline_data = 0; unsigned char new_fanout; /* * When loading a branch, we don't traverse its tree to count the real * number of notes (too expensive to do this for all non-note refs). * This means that recently loaded notes refs might incorrectly have * b->num_notes == 0, and consequently, old_fanout might be wrong. * * Fix this by traversing the tree and counting the number of notes * when b->num_notes == 0. If the notes tree is truly empty, the * calculation should not take long. */ if (b->num_notes == 0 && *old_fanout == 0) { /* Invoke change_note_fanout() in "counting mode". */ b->num_notes = change_note_fanout(&b->branch_tree, 0xff); *old_fanout = convert_num_notes_to_fanout(b->num_notes); } /* Now parse the notemodify command. */ /* <dataref> or 'inline' */ if (*p == ':') { oe = find_mark(parse_mark_ref_space(&p)); hashcpy(sha1, oe->idx.sha1); } else if (starts_with(p, "inline ")) { inline_data = 1; oe = NULL; /* not used with inline_data, but makes gcc happy */ p += strlen("inline"); /* advance to space */ } else { if (get_sha1_hex(p, sha1)) die("Invalid dataref: %s", command_buf.buf); oe = find_object(sha1); p += 40; if (*p != ' ') die("Missing space after SHA1: %s", command_buf.buf); } assert(*p == ' '); p++; /* skip space */ /* <commit-ish> */ s = lookup_branch(p); if (s) { if (is_null_sha1(s->sha1)) die("Can't add a note on empty branch."); hashcpy(commit_sha1, s->sha1); } else if (*p == ':') { uintmax_t commit_mark = parse_mark_ref_eol(p); struct object_entry *commit_oe = find_mark(commit_mark); if (commit_oe->type != OBJ_COMMIT) die("Mark :%" PRIuMAX " not a commit", commit_mark); hashcpy(commit_sha1, commit_oe->idx.sha1); } else if (!get_sha1(p, commit_sha1)) { unsigned long size; char *buf = read_object_with_reference(commit_sha1, commit_type, &size, commit_sha1); if (!buf || size < 46) die("Not a valid commit: %s", p); free(buf); } else die("Invalid ref name or SHA1 expression: %s", p); if (inline_data) { if (p != uq.buf) { strbuf_addstr(&uq, p); p = uq.buf; } read_next_command(); parse_and_store_blob(&last_blob, sha1, 0); } else if (oe) { if (oe->type != OBJ_BLOB) die("Not a blob (actually a %s): %s", typename(oe->type), command_buf.buf); } else if (!is_null_sha1(sha1)) { enum object_type type = sha1_object_info(sha1, NULL); if (type < 0) die("Blob not found: %s", command_buf.buf); if (type != OBJ_BLOB) die("Not a blob (actually a %s): %s", typename(type), command_buf.buf); } construct_path_with_fanout(sha1_to_hex(commit_sha1), *old_fanout, path); if (tree_content_remove(&b->branch_tree, path, NULL, 0)) b->num_notes--; if (is_null_sha1(sha1)) return; /* nothing to insert */ b->num_notes++; new_fanout = convert_num_notes_to_fanout(b->num_notes); construct_path_with_fanout(sha1_to_hex(commit_sha1), new_fanout, path); tree_content_set(&b->branch_tree, path, sha1, S_IFREG | 0644, NULL); } static void file_change_deleteall(struct branch *b) { release_tree_content_recursive(b->branch_tree.tree); hashclr(b->branch_tree.versions[0].sha1); hashclr(b->branch_tree.versions[1].sha1); load_tree(&b->branch_tree); b->num_notes = 0; } static void parse_from_commit(struct branch *b, char *buf, unsigned long size) { if (!buf || size < 46) die("Not a valid commit: %s", sha1_to_hex(b->sha1)); if (memcmp("tree ", buf, 5) || get_sha1_hex(buf + 5, b->branch_tree.versions[1].sha1)) die("The commit %s is corrupt", sha1_to_hex(b->sha1)); hashcpy(b->branch_tree.versions[0].sha1, b->branch_tree.versions[1].sha1); } static void parse_from_existing(struct branch *b) { if (is_null_sha1(b->sha1)) { hashclr(b->branch_tree.versions[0].sha1); hashclr(b->branch_tree.versions[1].sha1); } else { unsigned long size; char *buf; buf = read_object_with_reference(b->sha1, commit_type, &size, b->sha1); parse_from_commit(b, buf, size); free(buf); } } static int parse_from(struct branch *b) { const char *from; struct branch *s; if (!starts_with(command_buf.buf, "from ")) return 0; if (b->branch_tree.tree) { release_tree_content_recursive(b->branch_tree.tree); b->branch_tree.tree = NULL; } from = strchr(command_buf.buf, ' ') + 1; s = lookup_branch(from); if (b == s) die("Can't create a branch from itself: %s", b->name); else if (s) { unsigned char *t = s->branch_tree.versions[1].sha1; hashcpy(b->sha1, s->sha1); hashcpy(b->branch_tree.versions[0].sha1, t); hashcpy(b->branch_tree.versions[1].sha1, t); } else if (*from == ':') { uintmax_t idnum = parse_mark_ref_eol(from); struct object_entry *oe = find_mark(idnum); if (oe->type != OBJ_COMMIT) die("Mark :%" PRIuMAX " not a commit", idnum); hashcpy(b->sha1, oe->idx.sha1); if (oe->pack_id != MAX_PACK_ID) { unsigned long size; char *buf = gfi_unpack_entry(oe, &size); parse_from_commit(b, buf, size); free(buf); } else parse_from_existing(b); } else if (!get_sha1(from, b->sha1)) parse_from_existing(b); else die("Invalid ref name or SHA1 expression: %s", from); read_next_command(); return 1; } static struct hash_list *parse_merge(unsigned int *count) { struct hash_list *list = NULL, **tail = &list, *n; const char *from; struct branch *s; *count = 0; while (starts_with(command_buf.buf, "merge ")) { from = strchr(command_buf.buf, ' ') + 1; n = xmalloc(sizeof(*n)); s = lookup_branch(from); if (s) hashcpy(n->sha1, s->sha1); else if (*from == ':') { uintmax_t idnum = parse_mark_ref_eol(from); struct object_entry *oe = find_mark(idnum); if (oe->type != OBJ_COMMIT) die("Mark :%" PRIuMAX " not a commit", idnum); hashcpy(n->sha1, oe->idx.sha1); } else if (!get_sha1(from, n->sha1)) { unsigned long size; char *buf = read_object_with_reference(n->sha1, commit_type, &size, n->sha1); if (!buf || size < 46) die("Not a valid commit: %s", from); free(buf); } else die("Invalid ref name or SHA1 expression: %s", from); n->next = NULL; *tail = n; tail = &n->next; (*count)++; read_next_command(); } return list; } static void parse_new_commit(void) { static struct strbuf msg = STRBUF_INIT; struct branch *b; char *sp; char *author = NULL; char *committer = NULL; struct hash_list *merge_list = NULL; unsigned int merge_count; unsigned char prev_fanout, new_fanout; /* Obtain the branch name from the rest of our command */ sp = strchr(command_buf.buf, ' ') + 1; b = lookup_branch(sp); if (!b) b = new_branch(sp); read_next_command(); parse_mark(); if (starts_with(command_buf.buf, "author ")) { author = parse_ident(command_buf.buf + 7); read_next_command(); } if (starts_with(command_buf.buf, "committer ")) { committer = parse_ident(command_buf.buf + 10); read_next_command(); } if (!committer) die("Expected committer but didn't get one"); parse_data(&msg, 0, NULL); read_next_command(); parse_from(b); merge_list = parse_merge(&merge_count); /* ensure the branch is active/loaded */ if (!b->branch_tree.tree || !max_active_branches) { unload_one_branch(); load_branch(b); } prev_fanout = convert_num_notes_to_fanout(b->num_notes); /* file_change* */ while (command_buf.len > 0) { if (starts_with(command_buf.buf, "M ")) file_change_m(b); else if (starts_with(command_buf.buf, "D ")) file_change_d(b); else if (starts_with(command_buf.buf, "R ")) file_change_cr(b, 1); else if (starts_with(command_buf.buf, "C ")) file_change_cr(b, 0); else if (starts_with(command_buf.buf, "N ")) note_change_n(b, &prev_fanout); else if (!strcmp("deleteall", command_buf.buf)) file_change_deleteall(b); else if (starts_with(command_buf.buf, "ls ")) parse_ls(b); else { unread_command_buf = 1; break; } if (read_next_command() == EOF) break; } new_fanout = convert_num_notes_to_fanout(b->num_notes); if (new_fanout != prev_fanout) b->num_notes = change_note_fanout(&b->branch_tree, new_fanout); /* build the tree and the commit */ store_tree(&b->branch_tree); hashcpy(b->branch_tree.versions[0].sha1, b->branch_tree.versions[1].sha1); strbuf_reset(&new_data); strbuf_addf(&new_data, "tree %s\n", sha1_to_hex(b->branch_tree.versions[1].sha1)); if (!is_null_sha1(b->sha1)) strbuf_addf(&new_data, "parent %s\n", sha1_to_hex(b->sha1)); while (merge_list) { struct hash_list *next = merge_list->next; strbuf_addf(&new_data, "parent %s\n", sha1_to_hex(merge_list->sha1)); free(merge_list); merge_list = next; } strbuf_addf(&new_data, "author %s\n" "committer %s\n" "\n", author ? author : committer, committer); strbuf_addbuf(&new_data, &msg); free(author); free(committer); if (!store_object(OBJ_COMMIT, &new_data, NULL, b->sha1, next_mark)) b->pack_id = pack_id; b->last_commit = object_count_by_type[OBJ_COMMIT]; } static void parse_new_tag(void) { static struct strbuf msg = STRBUF_INIT; char *sp; const char *from; char *tagger; struct branch *s; struct tag *t; uintmax_t from_mark = 0; unsigned char sha1[20]; enum object_type type; /* Obtain the new tag name from the rest of our command */ sp = strchr(command_buf.buf, ' ') + 1; t = pool_alloc(sizeof(struct tag)); memset(t, 0, sizeof(struct tag)); t->name = pool_strdup(sp); if (last_tag) last_tag->next_tag = t; else first_tag = t; last_tag = t; read_next_command(); /* from ... */ if (!starts_with(command_buf.buf, "from ")) die("Expected from command, got %s", command_buf.buf); from = strchr(command_buf.buf, ' ') + 1; s = lookup_branch(from); if (s) { if (is_null_sha1(s->sha1)) die("Can't tag an empty branch."); hashcpy(sha1, s->sha1); type = OBJ_COMMIT; } else if (*from == ':') { struct object_entry *oe; from_mark = parse_mark_ref_eol(from); oe = find_mark(from_mark); type = oe->type; hashcpy(sha1, oe->idx.sha1); } else if (!get_sha1(from, sha1)) { struct object_entry *oe = find_object(sha1); if (!oe) { type = sha1_object_info(sha1, NULL); if (type < 0) die("Not a valid object: %s", from); } else type = oe->type; } else die("Invalid ref name or SHA1 expression: %s", from); read_next_command(); /* tagger ... */ if (starts_with(command_buf.buf, "tagger ")) { tagger = parse_ident(command_buf.buf + 7); read_next_command(); } else tagger = NULL; /* tag payload/message */ parse_data(&msg, 0, NULL); /* build the tag object */ strbuf_reset(&new_data); strbuf_addf(&new_data, "object %s\n" "type %s\n" "tag %s\n", sha1_to_hex(sha1), typename(type), t->name); if (tagger) strbuf_addf(&new_data, "tagger %s\n", tagger); strbuf_addch(&new_data, '\n'); strbuf_addbuf(&new_data, &msg); free(tagger); if (store_object(OBJ_TAG, &new_data, NULL, t->sha1, 0)) t->pack_id = MAX_PACK_ID; else t->pack_id = pack_id; } static void parse_reset_branch(void) { struct branch *b; char *sp; /* Obtain the branch name from the rest of our command */ sp = strchr(command_buf.buf, ' ') + 1; b = lookup_branch(sp); if (b) { hashclr(b->sha1); hashclr(b->branch_tree.versions[0].sha1); hashclr(b->branch_tree.versions[1].sha1); if (b->branch_tree.tree) { release_tree_content_recursive(b->branch_tree.tree); b->branch_tree.tree = NULL; } } else b = new_branch(sp); read_next_command(); parse_from(b); if (command_buf.len > 0) unread_command_buf = 1; } static void cat_blob_write(const char *buf, unsigned long size) { if (write_in_full(cat_blob_fd, buf, size) != size) die_errno("Write to frontend failed"); } static void cat_blob(struct object_entry *oe, unsigned char sha1[20]) { struct strbuf line = STRBUF_INIT; unsigned long size; enum object_type type = 0; char *buf; if (!oe || oe->pack_id == MAX_PACK_ID) { buf = read_sha1_file(sha1, &type, &size); } else { type = oe->type; buf = gfi_unpack_entry(oe, &size); } /* * Output based on batch_one_object() from cat-file.c. */ if (type <= 0) { strbuf_reset(&line); strbuf_addf(&line, "%s missing\n", sha1_to_hex(sha1)); cat_blob_write(line.buf, line.len); strbuf_release(&line); free(buf); return; } if (!buf) die("Can't read object %s", sha1_to_hex(sha1)); if (type != OBJ_BLOB) die("Object %s is a %s but a blob was expected.", sha1_to_hex(sha1), typename(type)); strbuf_reset(&line); strbuf_addf(&line, "%s %s %lu\n", sha1_to_hex(sha1), typename(type), size); cat_blob_write(line.buf, line.len); strbuf_release(&line); cat_blob_write(buf, size); cat_blob_write("\n", 1); if (oe && oe->pack_id == pack_id) { last_blob.offset = oe->idx.offset; strbuf_attach(&last_blob.data, buf, size, size); last_blob.depth = oe->depth; } else free(buf); } static void parse_cat_blob(void) { const char *p; struct object_entry *oe = oe; unsigned char sha1[20]; /* cat-blob SP <object> LF */ p = command_buf.buf + strlen("cat-blob "); if (*p == ':') { oe = find_mark(parse_mark_ref_eol(p)); if (!oe) die("Unknown mark: %s", command_buf.buf); hashcpy(sha1, oe->idx.sha1); } else { if (get_sha1_hex(p, sha1)) die("Invalid dataref: %s", command_buf.buf); if (p[40]) die("Garbage after SHA1: %s", command_buf.buf); oe = find_object(sha1); } cat_blob(oe, sha1); } static struct object_entry *dereference(struct object_entry *oe, unsigned char sha1[20]) { unsigned long size; char *buf = NULL; if (!oe) { enum object_type type = sha1_object_info(sha1, NULL); if (type < 0) die("object not found: %s", sha1_to_hex(sha1)); /* cache it! */ oe = insert_object(sha1); oe->type = type; oe->pack_id = MAX_PACK_ID; oe->idx.offset = 1; } switch (oe->type) { case OBJ_TREE: /* easy case. */ return oe; case OBJ_COMMIT: case OBJ_TAG: break; default: die("Not a tree-ish: %s", command_buf.buf); } if (oe->pack_id != MAX_PACK_ID) { /* in a pack being written */ buf = gfi_unpack_entry(oe, &size); } else { enum object_type unused; buf = read_sha1_file(sha1, &unused, &size); } if (!buf) die("Can't load object %s", sha1_to_hex(sha1)); /* Peel one layer. */ switch (oe->type) { case OBJ_TAG: if (size < 40 + strlen("object ") || get_sha1_hex(buf + strlen("object "), sha1)) die("Invalid SHA1 in tag: %s", command_buf.buf); break; case OBJ_COMMIT: if (size < 40 + strlen("tree ") || get_sha1_hex(buf + strlen("tree "), sha1)) die("Invalid SHA1 in commit: %s", command_buf.buf); } free(buf); return find_object(sha1); } static struct object_entry *parse_treeish_dataref(const char **p) { unsigned char sha1[20]; struct object_entry *e; if (**p == ':') { /* <mark> */ e = find_mark(parse_mark_ref_space(p)); if (!e) die("Unknown mark: %s", command_buf.buf); hashcpy(sha1, e->idx.sha1); } else { /* <sha1> */ if (get_sha1_hex(*p, sha1)) die("Invalid dataref: %s", command_buf.buf); e = find_object(sha1); *p += 40; } while (!e || e->type != OBJ_TREE) e = dereference(e, sha1); return e; } static void print_ls(int mode, const unsigned char *sha1, const char *path) { static struct strbuf line = STRBUF_INIT; /* See show_tree(). */ const char *type = S_ISGITLINK(mode) ? commit_type : S_ISDIR(mode) ? tree_type : blob_type; if (!mode) { /* missing SP path LF */ strbuf_reset(&line); strbuf_addstr(&line, "missing "); quote_c_style(path, &line, NULL, 0); strbuf_addch(&line, '\n'); } else { /* mode SP type SP object_name TAB path LF */ strbuf_reset(&line); strbuf_addf(&line, "%06o %s %s\t", mode & ~NO_DELTA, type, sha1_to_hex(sha1)); quote_c_style(path, &line, NULL, 0); strbuf_addch(&line, '\n'); } cat_blob_write(line.buf, line.len); } static void parse_ls(struct branch *b) { const char *p; struct tree_entry *root = NULL; struct tree_entry leaf = {NULL}; /* ls SP (<tree-ish> SP)? <path> */ p = command_buf.buf + strlen("ls "); if (*p == '"') { if (!b) die("Not in a commit: %s", command_buf.buf); root = &b->branch_tree; } else { struct object_entry *e = parse_treeish_dataref(&p); root = new_tree_entry(); hashcpy(root->versions[1].sha1, e->idx.sha1); if (!is_null_sha1(root->versions[1].sha1)) root->versions[1].mode = S_IFDIR; load_tree(root); if (*p++ != ' ') die("Missing space after tree-ish: %s", command_buf.buf); } if (*p == '"') { static struct strbuf uq = STRBUF_INIT; const char *endp; strbuf_reset(&uq); if (unquote_c_style(&uq, p, &endp)) die("Invalid path: %s", command_buf.buf); if (*endp) die("Garbage after path in: %s", command_buf.buf); p = uq.buf; } tree_content_get(root, p, &leaf, 1); /* * A directory in preparation would have a sha1 of zero * until it is saved. Save, for simplicity. */ if (S_ISDIR(leaf.versions[1].mode)) store_tree(&leaf); print_ls(leaf.versions[1].mode, leaf.versions[1].sha1, p); if (leaf.tree) release_tree_content_recursive(leaf.tree); if (!b || root != &b->branch_tree) release_tree_entry(root); } static void checkpoint(void) { checkpoint_requested = 0; if (object_count) { cycle_packfile(); dump_branches(); dump_tags(); dump_marks(); } } static void parse_checkpoint(void) { checkpoint_requested = 1; skip_optional_lf(); } static void parse_progress(void) { fwrite(command_buf.buf, 1, command_buf.len, stdout); fputc('\n', stdout); fflush(stdout); skip_optional_lf(); } static char* make_fast_import_path(const char *path) { struct strbuf abs_path = STRBUF_INIT; if (!relative_marks_paths || is_absolute_path(path)) return xstrdup(path); strbuf_addf(&abs_path, "%s/info/fast-import/%s", get_git_dir(), path); return strbuf_detach(&abs_path, NULL); } static void option_import_marks(const char *marks, int from_stream, int ignore_missing) { if (import_marks_file) { if (from_stream) die("Only one import-marks command allowed per stream"); /* read previous mark file */ if(!import_marks_file_from_stream) read_marks(); } import_marks_file = make_fast_import_path(marks); safe_create_leading_directories_const(import_marks_file); import_marks_file_from_stream = from_stream; import_marks_file_ignore_missing = ignore_missing; } static void option_date_format(const char *fmt) { if (!strcmp(fmt, "raw")) whenspec = WHENSPEC_RAW; else if (!strcmp(fmt, "rfc2822")) whenspec = WHENSPEC_RFC2822; else if (!strcmp(fmt, "now")) whenspec = WHENSPEC_NOW; else die("unknown --date-format argument %s", fmt); } static unsigned long ulong_arg(const char *option, const char *arg) { char *endptr; unsigned long rv = strtoul(arg, &endptr, 0); if (strchr(arg, '-') || endptr == arg || *endptr) die("%s: argument must be a non-negative integer", option); return rv; } static void option_depth(const char *depth) { max_depth = ulong_arg("--depth", depth); if (max_depth > MAX_DEPTH) die("--depth cannot exceed %u", MAX_DEPTH); } static void option_active_branches(const char *branches) { max_active_branches = ulong_arg("--active-branches", branches); } static void option_export_marks(const char *marks) { export_marks_file = make_fast_import_path(marks); safe_create_leading_directories_const(export_marks_file); } static void option_cat_blob_fd(const char *fd) { unsigned long n = ulong_arg("--cat-blob-fd", fd); if (n > (unsigned long) INT_MAX) die("--cat-blob-fd cannot exceed %d", INT_MAX); cat_blob_fd = (int) n; } static void option_export_pack_edges(const char *edges) { if (pack_edges) fclose(pack_edges); pack_edges = fopen(edges, "a"); if (!pack_edges) die_errno("Cannot open '%s'", edges); } static int parse_one_option(const char *option) { if (starts_with(option, "max-pack-size=")) { unsigned long v; if (!git_parse_ulong(option + 14, &v)) return 0; if (v < 8192) { warning("max-pack-size is now in bytes, assuming --max-pack-size=%lum", v); v *= 1024 * 1024; } else if (v < 1024 * 1024) { warning("minimum max-pack-size is 1 MiB"); v = 1024 * 1024; } max_packsize = v; } else if (starts_with(option, "big-file-threshold=")) { unsigned long v; if (!git_parse_ulong(option + 19, &v)) return 0; big_file_threshold = v; } else if (starts_with(option, "depth=")) { option_depth(option + 6); } else if (starts_with(option, "active-branches=")) { option_active_branches(option + 16); } else if (starts_with(option, "export-pack-edges=")) { option_export_pack_edges(option + 18); } else if (starts_with(option, "quiet")) { show_stats = 0; } else if (starts_with(option, "stats")) { show_stats = 1; } else { return 0; } return 1; } static int parse_one_feature(const char *feature, int from_stream) { if (starts_with(feature, "date-format=")) { option_date_format(feature + 12); } else if (starts_with(feature, "import-marks=")) { option_import_marks(feature + 13, from_stream, 0); } else if (starts_with(feature, "import-marks-if-exists=")) { option_import_marks(feature + strlen("import-marks-if-exists="), from_stream, 1); } else if (starts_with(feature, "export-marks=")) { option_export_marks(feature + 13); } else if (!strcmp(feature, "cat-blob")) { ; /* Don't die - this feature is supported */ } else if (!strcmp(feature, "relative-marks")) { relative_marks_paths = 1; } else if (!strcmp(feature, "no-relative-marks")) { relative_marks_paths = 0; } else if (!strcmp(feature, "done")) { require_explicit_termination = 1; } else if (!strcmp(feature, "force")) { force_update = 1; } else if (!strcmp(feature, "notes") || !strcmp(feature, "ls")) { ; /* do nothing; we have the feature */ } else { return 0; } return 1; } static void parse_feature(void) { char *feature = command_buf.buf + 8; if (seen_data_command) die("Got feature command '%s' after data command", feature); if (parse_one_feature(feature, 1)) return; die("This version of fast-import does not support feature %s.", feature); } static void parse_option(void) { char *option = command_buf.buf + 11; if (seen_data_command) die("Got option command '%s' after data command", option); if (parse_one_option(option)) return; die("This version of fast-import does not support option: %s", option); } static int git_pack_config(const char *k, const char *v, void *cb) { if (!strcmp(k, "pack.depth")) { max_depth = git_config_int(k, v); if (max_depth > MAX_DEPTH) max_depth = MAX_DEPTH; return 0; } if (!strcmp(k, "pack.compression")) { int level = git_config_int(k, v); if (level == -1) level = Z_DEFAULT_COMPRESSION; else if (level < 0 || level > Z_BEST_COMPRESSION) die("bad pack compression level %d", level); pack_compression_level = level; pack_compression_seen = 1; return 0; } if (!strcmp(k, "pack.indexversion")) { pack_idx_opts.version = git_config_int(k, v); if (pack_idx_opts.version > 2) die("bad pack.indexversion=%"PRIu32, pack_idx_opts.version); return 0; } if (!strcmp(k, "pack.packsizelimit")) { max_packsize = git_config_ulong(k, v); return 0; } return git_default_config(k, v, cb); } static const char fast_import_usage[] = "git fast-import [--date-format=<f>] [--max-pack-size=<n>] [--big-file-threshold=<n>] [--depth=<n>] [--active-branches=<n>] [--export-marks=<marks.file>]"; static void parse_argv(void) { unsigned int i; for (i = 1; i < global_argc; i++) { const char *a = global_argv[i]; if (*a != '-' || !strcmp(a, "--")) break; if (parse_one_option(a + 2)) continue; if (parse_one_feature(a + 2, 0)) continue; if (starts_with(a + 2, "cat-blob-fd=")) { option_cat_blob_fd(a + 2 + strlen("cat-blob-fd=")); continue; } die("unknown option %s", a); } if (i != global_argc) usage(fast_import_usage); seen_data_command = 1; if (import_marks_file) read_marks(); } int main(int argc, char **argv) { unsigned int i; git_extract_argv0_path(argv[0]); git_setup_gettext(); if (argc == 2 && !strcmp(argv[1], "-h")) usage(fast_import_usage); setup_git_directory(); reset_pack_idx_option(&pack_idx_opts); git_config(git_pack_config, NULL); if (!pack_compression_seen && core_compression_seen) pack_compression_level = core_compression_level; alloc_objects(object_entry_alloc); strbuf_init(&command_buf, 0); atom_table = xcalloc(atom_table_sz, sizeof(struct atom_str*)); branch_table = xcalloc(branch_table_sz, sizeof(struct branch*)); avail_tree_table = xcalloc(avail_tree_table_sz, sizeof(struct avail_tree_content*)); marks = pool_calloc(1, sizeof(struct mark_set)); global_argc = argc; global_argv = argv; rc_free = pool_alloc(cmd_save * sizeof(*rc_free)); for (i = 0; i < (cmd_save - 1); i++) rc_free[i].next = &rc_free[i + 1]; rc_free[cmd_save - 1].next = NULL; prepare_packed_git(); start_packfile(); set_die_routine(die_nicely); set_checkpoint_signal(); while (read_next_command() != EOF) { if (!strcmp("blob", command_buf.buf)) parse_new_blob(); else if (starts_with(command_buf.buf, "ls ")) parse_ls(NULL); else if (starts_with(command_buf.buf, "commit ")) parse_new_commit(); else if (starts_with(command_buf.buf, "tag ")) parse_new_tag(); else if (starts_with(command_buf.buf, "reset ")) parse_reset_branch(); else if (!strcmp("checkpoint", command_buf.buf)) parse_checkpoint(); else if (!strcmp("done", command_buf.buf)) break; else if (starts_with(command_buf.buf, "progress ")) parse_progress(); else if (starts_with(command_buf.buf, "feature ")) parse_feature(); else if (starts_with(command_buf.buf, "option git ")) parse_option(); else if (starts_with(command_buf.buf, "option ")) /* ignore non-git options*/; else die("Unsupported command: %s", command_buf.buf); if (checkpoint_requested) checkpoint(); } /* argv hasn't been parsed yet, do so */ if (!seen_data_command) parse_argv(); if (require_explicit_termination && feof(stdin)) die("stream ends early"); end_packfile(); dump_branches(); dump_tags(); unkeep_all_packs(); dump_marks(); if (pack_edges) fclose(pack_edges); if (show_stats) { uintmax_t total_count = 0, duplicate_count = 0; for (i = 0; i < ARRAY_SIZE(object_count_by_type); i++) total_count += object_count_by_type[i]; for (i = 0; i < ARRAY_SIZE(duplicate_count_by_type); i++) duplicate_count += duplicate_count_by_type[i]; fprintf(stderr, "%s statistics:\n", argv[0]); fprintf(stderr, "---------------------------------------------------------------------\n"); fprintf(stderr, "Alloc'd objects: %10" PRIuMAX "\n", alloc_count); fprintf(stderr, "Total objects: %10" PRIuMAX " (%10" PRIuMAX " duplicates )\n", total_count, duplicate_count); fprintf(stderr, " blobs : %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas of %10" PRIuMAX" attempts)\n", object_count_by_type[OBJ_BLOB], duplicate_count_by_type[OBJ_BLOB], delta_count_by_type[OBJ_BLOB], delta_count_attempts_by_type[OBJ_BLOB]); fprintf(stderr, " trees : %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas of %10" PRIuMAX" attempts)\n", object_count_by_type[OBJ_TREE], duplicate_count_by_type[OBJ_TREE], delta_count_by_type[OBJ_TREE], delta_count_attempts_by_type[OBJ_TREE]); fprintf(stderr, " commits: %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas of %10" PRIuMAX" attempts)\n", object_count_by_type[OBJ_COMMIT], duplicate_count_by_type[OBJ_COMMIT], delta_count_by_type[OBJ_COMMIT], delta_count_attempts_by_type[OBJ_COMMIT]); fprintf(stderr, " tags : %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas of %10" PRIuMAX" attempts)\n", object_count_by_type[OBJ_TAG], duplicate_count_by_type[OBJ_TAG], delta_count_by_type[OBJ_TAG], delta_count_attempts_by_type[OBJ_TAG]); fprintf(stderr, "Total branches: %10lu (%10lu loads )\n", branch_count, branch_load_count); fprintf(stderr, " marks: %10" PRIuMAX " (%10" PRIuMAX " unique )\n", (((uintmax_t)1) << marks->shift) * 1024, marks_set_count); fprintf(stderr, " atoms: %10u\n", atom_cnt); fprintf(stderr, "Memory total: %10" PRIuMAX " KiB\n", (total_allocd + alloc_count*sizeof(struct object_entry))/1024); fprintf(stderr, " pools: %10lu KiB\n", (unsigned long)(total_allocd/1024)); fprintf(stderr, " objects: %10" PRIuMAX " KiB\n", (alloc_count*sizeof(struct object_entry))/1024); fprintf(stderr, "---------------------------------------------------------------------\n"); pack_report(); fprintf(stderr, "---------------------------------------------------------------------\n"); fprintf(stderr, "\n"); } return failure ? 1 : 0; }