diff options
Diffstat (limited to 'fast-import.c')
| -rw-r--r-- | fast-import.c | 1958 |
1 files changed, 1431 insertions, 527 deletions
diff --git a/fast-import.c b/fast-import.c index fda50188ea..ddad289dae 100644 --- a/fast-import.c +++ b/fast-import.c @@ -1,4 +1,5 @@ /* +(See Documentation/git-fast-import.txt for maintained documentation.) Format of STDIN stream: stream ::= cmd*; @@ -8,74 +9,89 @@ Format of STDIN stream: | new_tag | reset_branch | checkpoint + | progress ; new_blob ::= 'blob' lf - mark? + mark? file_content; file_content ::= data; new_commit ::= 'commit' sp ref_str lf mark? - ('author' sp name '<' email '>' when lf)? - 'committer' sp name '<' email '>' when lf + ('author' (sp name)? sp '<' email '>' sp when lf)? + 'committer' (sp name)? sp '<' email '>' sp when lf commit_msg - ('from' sp (ref_str | hexsha1 | sha1exp_str | idnum) lf)? - ('merge' sp (ref_str | hexsha1 | sha1exp_str | idnum) lf)* + ('from' sp committish lf)? + ('merge' sp committish lf)* file_change* - lf; + lf?; commit_msg ::= data; - file_change ::= file_clr | file_del | file_obm | file_inm; + 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 committish lf; + note_inm ::= 'N' sp 'inline' sp committish lf + data; new_tag ::= 'tag' sp tag_str lf - 'from' sp (ref_str | hexsha1 | sha1exp_str | idnum) lf - 'tagger' sp name '<' email '>' when lf + 'from' sp committish lf + ('tagger' (sp name)? sp '<' email '>' sp when lf)? tag_msg; tag_msg ::= data; reset_branch ::= 'reset' sp ref_str lf - ('from' sp (ref_str | hexsha1 | sha1exp_str | idnum) lf)? - lf; + ('from' sp committish lf)? + lf?; checkpoint ::= 'checkpoint' lf - 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 + # 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; + 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; + delim lf; # note: declen indicates the length of binary_data in bytes. - # declen does not include the lf preceeding the binary data. + # 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 + # 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. + # are UTF8. # + committish ::= (ref_str | hexsha1 | sha1exp_str | idnum); ref_str ::= ref; sha1exp_str ::= sha1exp; tag_str ::= tag; @@ -97,9 +113,9 @@ Format of STDIN stream: 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 + # 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"; @@ -108,13 +124,24 @@ Format of STDIN stream: 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 + # 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 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). + # + comment ::= '#' not_lf* lf; + not_lf ::= # Any byte that is not ASCII newline (LF); */ #include "builtin.h" @@ -127,19 +154,21 @@ Format of STDIN stream: #include "pack.h" #include "refs.h" #include "csum-file.h" -#include "strbuf.h" #include "quote.h" +#include "exec_cmd.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) struct object_entry { + struct pack_idx_entry idx; struct object_entry *next; - uint32_t offset; - unsigned type : TYPE_BITS; - unsigned pack_id : PACK_ID_BITS; - unsigned char sha1[20]; + uint32_t type : TYPE_BITS, + pack_id : PACK_ID_BITS, + depth : DEPTH_BITS; }; struct object_entry_pool @@ -161,11 +190,10 @@ struct mark_set struct last_object { - void *data; - unsigned long len; - uint32_t offset; + struct strbuf data; + off_t offset; unsigned int depth; - unsigned no_free:1; + unsigned no_swap : 1; }; struct mem_pool @@ -173,7 +201,7 @@ struct mem_pool struct mem_pool *next_pool; char *next_free; char *end; - char space[FLEX_ARRAY]; /* more */ + uintmax_t space[FLEX_ARRAY]; /* more */ }; struct atom_str @@ -187,7 +215,7 @@ struct tree_content; struct tree_entry { struct tree_content *tree; - struct atom_str* name; + struct atom_str *name; struct tree_entry_ms { uint16_t mode; @@ -216,6 +244,7 @@ struct 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]; @@ -229,12 +258,6 @@ struct tag unsigned char sha1[20]; }; -struct dbuf -{ - void *buffer; - size_t capacity; -}; - struct hash_list { struct hash_list *next; @@ -244,13 +267,23 @@ struct hash_list typedef enum { WHENSPEC_RAW = 1, WHENSPEC_RFC2822, - WHENSPEC_NOW, + 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 = (1LL << 32) - 1; +static off_t max_packsize; +static uintmax_t big_file_threshold = 512 * 1024 * 1024; 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; @@ -263,6 +296,9 @@ 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 size_t mem_pool_alloc = 2*1024*1024 - sizeof(struct mem_pool); @@ -276,27 +312,31 @@ static struct atom_str **atom_table; /* The .pack file being generated */ static unsigned int pack_id; +static struct sha1file *pack_file; static struct packed_git *pack_data; static struct packed_git **all_packs; -static unsigned long pack_size; +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* mark_file; +static const char *export_marks_file; +static const char *import_marks_file; +static int import_marks_file_from_stream; +static int relative_marks_paths; /* Our last blob */ -static struct last_object 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 dbuf old_tree; -static struct dbuf new_tree; +static struct strbuf old_tree = STRBUF_INIT; +static struct strbuf new_tree = STRBUF_INIT; /* Branch data */ static unsigned long max_active_branches = 5; @@ -311,10 +351,154 @@ static struct tag *last_tag; /* Input stream parsing */ static whenspec_type whenspec = WHENSPEC_RAW; -static struct strbuf command_buf; +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 dbuf new_data; +static struct strbuf new_data = STRBUF_INIT; +static int seen_data_command; + +static void parse_argv(void); + +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); +} static void alloc_objects(unsigned int cnt) { @@ -337,7 +521,7 @@ static struct object_entry *new_object(unsigned char *sha1) alloc_objects(object_entry_alloc); e = blocks->next_free++; - hashcpy(e->sha1, sha1); + hashcpy(e->idx.sha1, sha1); return e; } @@ -346,7 +530,7 @@ 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->sha1)) + if (!hashcmp(sha1, e->idx.sha1)) return e; return NULL; } @@ -358,7 +542,7 @@ static struct object_entry *insert_object(unsigned char *sha1) struct object_entry *p = NULL; while (e) { - if (!hashcmp(sha1, e->sha1)) + if (!hashcmp(sha1, e->idx.sha1)) return e; p = e; e = e->next; @@ -366,7 +550,7 @@ static struct object_entry *insert_object(unsigned char *sha1) e = new_object(sha1); e->next = NULL; - e->offset = 0; + e->idx.offset = 0; if (p) p->next = e; else @@ -387,6 +571,10 @@ 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; @@ -399,15 +587,12 @@ static void *pool_alloc(size_t 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 = p->space; + p->next_free = (char *) p->space; p->end = p->next_free + mem_pool_alloc; mem_pool = p; } r = p->next_free; - /* round out to a pointer alignment */ - if (len & (sizeof(void*) - 1)) - len += sizeof(void*) - (len & (sizeof(void*) - 1)); p->next_free += len; return r; } @@ -427,17 +612,6 @@ static char *pool_strdup(const char *s) return r; } -static void size_dbuf(struct dbuf *b, size_t maxlen) -{ - if (b->buffer) { - if (b->capacity >= maxlen) - return; - free(b->buffer); - } - b->capacity = ((maxlen / 1024) + 1) * 1024; - b->buffer = xmalloc(b->capacity); -} - static void insert_mark(uintmax_t idnum, struct object_entry *oe) { struct mark_set *s = marks; @@ -513,18 +687,24 @@ static struct branch *lookup_branch(const char *name) 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); + struct branch *b = lookup_branch(name); if (b) die("Invalid attempt to create duplicate branch: %s", name); - if (check_ref_format(name)) + switch (check_ref_format(name)) { + case 0: break; /* its valid */ + case CHECK_REF_FORMAT_ONELEVEL: + break; /* valid, but too few '/', allow anyway */ + default: 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; @@ -622,6 +802,31 @@ static void release_tree_entry(struct tree_entry *e) 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 tmpfile[PATH_MAX]; @@ -629,19 +834,17 @@ static void start_packfile(void) struct pack_header hdr; int pack_fd; - snprintf(tmpfile, sizeof(tmpfile), - "%s/pack_XXXXXX", get_object_directory()); - pack_fd = mkstemp(tmpfile); - if (pack_fd < 0) - die("Can't create %s: %s", tmpfile, strerror(errno)); + pack_fd = odb_mkstemp(tmpfile, sizeof(tmpfile), + "pack/tmp_pack_XXXXXX"); p = xcalloc(1, sizeof(*p) + strlen(tmpfile) + 2); strcpy(p->pack_name, tmpfile); p->pack_fd = pack_fd; + pack_file = sha1fd(pack_fd, p->pack_name); hdr.hdr_signature = htonl(PACK_SIGNATURE); hdr.hdr_version = htonl(2); hdr.hdr_entries = 0; - write_or_die(p->pack_fd, &hdr, sizeof(hdr)); + sha1write(pack_file, &hdr, sizeof(hdr)); pack_data = p; pack_size = sizeof(hdr); @@ -651,121 +854,41 @@ static void start_packfile(void) all_packs[pack_id] = p; } -static void fixup_header_footer(void) +static const char *create_index(void) { - static const int buf_sz = 128 * 1024; - int pack_fd = pack_data->pack_fd; - SHA_CTX c; - struct pack_header hdr; - char *buf; - - if (lseek(pack_fd, 0, SEEK_SET) != 0) - die("Failed seeking to start: %s", strerror(errno)); - if (read_in_full(pack_fd, &hdr, sizeof(hdr)) != sizeof(hdr)) - die("Unable to reread header of %s", pack_data->pack_name); - if (lseek(pack_fd, 0, SEEK_SET) != 0) - die("Failed seeking to start: %s", strerror(errno)); - hdr.hdr_entries = htonl(object_count); - write_or_die(pack_fd, &hdr, sizeof(hdr)); - - SHA1_Init(&c); - SHA1_Update(&c, &hdr, sizeof(hdr)); - - buf = xmalloc(buf_sz); - for (;;) { - size_t n = xread(pack_fd, buf, buf_sz); - if (!n) - break; - if (n < 0) - die("Failed to checksum %s", pack_data->pack_name); - SHA1_Update(&c, buf, n); - } - free(buf); - - SHA1_Final(pack_data->sha1, &c); - write_or_die(pack_fd, pack_data->sha1, sizeof(pack_data->sha1)); - close(pack_fd); -} - -static int oecmp (const void *a_, const void *b_) -{ - struct object_entry *a = *((struct object_entry**)a_); - struct object_entry *b = *((struct object_entry**)b_); - return hashcmp(a->sha1, b->sha1); -} - -static char *create_index(void) -{ - static char tmpfile[PATH_MAX]; - SHA_CTX ctx; - struct sha1file *f; - struct object_entry **idx, **c, **last, *e; + const char *tmpfile; + struct pack_idx_entry **idx, **c, **last; + struct object_entry *e; struct object_entry_pool *o; - uint32_t array[256]; - int i, idx_fd; - /* Build the sorted table of object IDs. */ - idx = xmalloc(object_count * sizeof(struct object_entry*)); + /* Build the table of object IDs. */ + idx = xmalloc(object_count * sizeof(*idx)); c = idx; for (o = blocks; o; o = o->next_pool) for (e = o->next_free; e-- != o->entries;) if (pack_id == e->pack_id) - *c++ = e; + *c++ = &e->idx; last = idx + object_count; if (c != last) die("internal consistency error creating the index"); - qsort(idx, object_count, sizeof(struct object_entry*), oecmp); - /* Generate the fan-out array. */ - c = idx; - for (i = 0; i < 256; i++) { - struct object_entry **next = c;; - while (next < last) { - if ((*next)->sha1[0] != i) - break; - next++; - } - array[i] = htonl(next - idx); - c = next; - } - - snprintf(tmpfile, sizeof(tmpfile), - "%s/index_XXXXXX", get_object_directory()); - idx_fd = mkstemp(tmpfile); - if (idx_fd < 0) - die("Can't create %s: %s", tmpfile, strerror(errno)); - f = sha1fd(idx_fd, tmpfile); - sha1write(f, array, 256 * sizeof(int)); - SHA1_Init(&ctx); - for (c = idx; c != last; c++) { - uint32_t offset = htonl((*c)->offset); - sha1write(f, &offset, 4); - sha1write(f, (*c)->sha1, sizeof((*c)->sha1)); - SHA1_Update(&ctx, (*c)->sha1, 20); - } - sha1write(f, pack_data->sha1, sizeof(pack_data->sha1)); - sha1close(f, NULL, 1); + tmpfile = write_idx_file(NULL, idx, object_count, pack_data->sha1); free(idx); - SHA1_Final(pack_data->sha1, &ctx); return tmpfile; } -static char *keep_pack(char *curr_index_name) +static char *keep_pack(const char *curr_index_name) { static char name[PATH_MAX]; static const char *keep_msg = "fast-import"; int keep_fd; - chmod(pack_data->pack_name, 0444); - chmod(curr_index_name, 0444); - - snprintf(name, sizeof(name), "%s/pack/pack-%s.keep", - get_object_directory(), sha1_to_hex(pack_data->sha1)); - keep_fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600); + keep_fd = odb_pack_keep(name, sizeof(name), pack_data->sha1); if (keep_fd < 0) - die("cannot create keep file"); - write(keep_fd, keep_msg, strlen(keep_msg)); - close(keep_fd); + 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)); @@ -776,6 +899,7 @@ static char *keep_pack(char *curr_index_name) get_object_directory(), sha1_to_hex(pack_data->sha1)); if (move_temp_to_file(curr_index_name, name)) die("cannot store index file"); + free((void *)curr_index_name); return name; } @@ -788,7 +912,7 @@ static void unkeep_all_packs(void) 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(name); + unlink_or_warn(name); } } @@ -796,20 +920,26 @@ 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; - fixup_header_footer(); + 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 machinary. */ + /* 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); - new_p->windows = old_p->windows; all_packs[pack_id] = new_p; install_packed_git(new_p); @@ -832,14 +962,14 @@ static void end_packfile(void) pack_id++; } - else - unlink(old_p->pack_name); + else { + close(old_p->pack_fd); + unlink_or_warn(old_p->pack_name); + } free(old_p); /* We can't carry a delta across packfiles. */ - free(last_blob.data); - last_blob.data = NULL; - last_blob.len = 0; + strbuf_release(&last_blob.data); last_blob.offset = 0; last_blob.depth = 0; } @@ -850,33 +980,9 @@ static void cycle_packfile(void) start_packfile(); } -static size_t encode_header( - enum object_type type, - size_t size, - unsigned char *hdr) -{ - int n = 1; - unsigned char c; - - if (type < OBJ_COMMIT || type > OBJ_REF_DELTA) - die("bad type %d", type); - - c = (type << 4) | (size & 15); - size >>= 4; - while (size) { - *hdr++ = c | 0x80; - c = size & 0x7f; - size >>= 7; - n++; - } - *hdr = c; - return n; -} - static int store_object( enum object_type type, - void *dat, - size_t datlen, + struct strbuf *dat, struct last_object *last, unsigned char *sha1out, uintmax_t mark) @@ -886,45 +992,47 @@ static int store_object( unsigned char hdr[96]; unsigned char sha1[20]; unsigned long hdrlen, deltalen; - SHA_CTX c; + git_SHA_CTX c; z_stream s; - hdrlen = sprintf((char*)hdr,"%s %lu", typename(type), - (unsigned long)datlen) + 1; - SHA1_Init(&c); - SHA1_Update(&c, hdr, hdrlen); - SHA1_Update(&c, dat, datlen); - SHA1_Final(sha1, &c); + 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->offset) { + 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 && last->depth < max_depth) { - delta = diff_delta(last->data, last->len, - dat, datlen, - &deltalen, 0); - if (delta && deltalen >= datlen) { - free(delta); - delta = NULL; - } + if (last && last->data.buf && last->depth < max_depth && dat->len > 20) { + 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)); - deflateInit(&s, zlib_compression_level); + deflateInit(&s, pack_compression_level); if (delta) { s.next_in = delta; s.avail_in = deltalen; } else { - s.next_in = dat; - s.avail_in = datlen; + s.next_in = (void *)dat->buf; + s.avail_in = dat->len; } s.avail_out = deflateBound(&s, s.avail_in); s.next_out = out = xmalloc(s.avail_out); @@ -933,7 +1041,7 @@ static int store_object( deflateEnd(&s); /* Determine if we should auto-checkpoint. */ - if ((pack_size + 60 + s.total_out) > max_packsize + 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. */ @@ -946,9 +1054,9 @@ static int store_object( delta = NULL; memset(&s, 0, sizeof(s)); - deflateInit(&s, zlib_compression_level); - s.next_in = dat; - s.avail_in = datlen; + deflateInit(&s, pack_compression_level); + s.next_in = (void *)dat->buf; + s.avail_in = dat->len; s.avail_out = deflateBound(&s, s.avail_in); s.next_out = out = xrealloc(out, s.avail_out); while (deflate(&s, Z_FINISH) == Z_OK) @@ -959,58 +1067,224 @@ static int store_object( e->type = type; e->pack_id = pack_id; - e->offset = pack_size; + e->idx.offset = pack_size; object_count++; object_count_by_type[type]++; + crc32_begin(pack_file); + if (delta) { - unsigned long ofs = e->offset - last->offset; + off_t ofs = e->idx.offset - last->offset; unsigned pos = sizeof(hdr) - 1; delta_count_by_type[type]++; - last->depth++; + e->depth = last->depth + 1; - hdrlen = encode_header(OBJ_OFS_DELTA, deltalen, hdr); - write_or_die(pack_data->pack_fd, hdr, hdrlen); + 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); - write_or_die(pack_data->pack_fd, hdr + pos, sizeof(hdr) - pos); + sha1write(pack_file, hdr + pos, sizeof(hdr) - pos); pack_size += sizeof(hdr) - pos; } else { - if (last) - last->depth = 0; - hdrlen = encode_header(type, datlen, hdr); - write_or_die(pack_data->pack_fd, hdr, hdrlen); + e->depth = 0; + hdrlen = encode_in_pack_object_header(type, dat->len, hdr); + sha1write(pack_file, hdr, hdrlen); pack_size += hdrlen; } - write_or_die(pack_data->pack_fd, out, s.total_out); + 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_free) - free(last->data); - last->data = dat; - last->offset = e->offset; - last->len = datlen; + 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(off_t to, git_SHA_CTX *ctx) +{ + if (ftruncate(pack_data->pack_fd, to) + || lseek(pack_data->pack_fd, to, SEEK_SET) != to) + die_errno("cannot truncate pack to skip duplicate"); + pack_size = to; + + /* yes this is a layering violation */ + pack_file->total = to; + pack_file->offset = 0; + pack_file->ctx = *ctx; +} + +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_SHA_CTX pack_file_ctx; + z_stream s; + 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(); + + offset = pack_size; + + /* preserve the pack_file SHA1 ctx in case we have to truncate later */ + sha1flush(pack_file); + pack_file_ctx = pack_file->ctx; + + 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)); + deflateInit(&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 = 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); + } + } + deflateEnd(&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(offset, &pack_file_ctx); + + } 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(offset, &pack_file_ctx); + + } 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) + 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->offset, &type, sizep); + } + return unpack_entry(p, oe->idx.offset, &type, sizep); } static const char *get_mode(const char *str, uint16_t *modep) @@ -1029,7 +1303,7 @@ static const char *get_mode(const char *str, uint16_t *modep) static void load_tree(struct tree_entry *root) { - unsigned char* sha1 = root->versions[1].sha1; + unsigned char *sha1 = root->versions[1].sha1; struct object_entry *myoe; struct tree_content *t; unsigned long size; @@ -1041,11 +1315,13 @@ static void load_tree(struct tree_entry *root) return; myoe = find_object(sha1); - if (myoe) { + 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 = 0; + 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); @@ -1058,7 +1334,7 @@ static void load_tree(struct tree_entry *root) struct tree_entry *e = new_tree_entry(); if (t->entry_count == t->entry_capacity) - root->tree = t = grow_tree_content(t, 8); + root->tree = t = grow_tree_content(t, t->entry_count); t->entries[t->entry_count++] = e; e->tree = NULL; @@ -1066,10 +1342,10 @@ static void load_tree(struct tree_entry *root) if (!c) die("Corrupt mode in %s", sha1_to_hex(sha1)); e->versions[0].mode = e->versions[1].mode; - e->name = to_atom(c, (unsigned short)strlen(c)); + 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); + hashcpy(e->versions[0].sha1, (unsigned char *)c); + hashcpy(e->versions[1].sha1, (unsigned char *)c); c += 20; } free(buf); @@ -1093,14 +1369,10 @@ static int tecmp1 (const void *_a, const void *_b) b->name->str_dat, b->name->str_len, b->versions[1].mode); } -static void mktree(struct tree_content *t, - int v, - unsigned long *szp, - struct dbuf *b) +static void mktree(struct tree_content *t, int v, struct strbuf *b) { size_t maxlen = 0; unsigned int i; - char *c; if (!v) qsort(t->entries,t->entry_count,sizeof(t->entries[0]),tecmp0); @@ -1112,28 +1384,23 @@ static void mktree(struct tree_content *t, maxlen += t->entries[i]->name->str_len + 34; } - size_dbuf(b, maxlen); - c = b->buffer; + 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; - c += sprintf(c, "%o", (unsigned int)e->versions[v].mode); - *c++ = ' '; - strcpy(c, e->name->str_dat); - c += e->name->str_len + 1; - hashcpy((unsigned char*)c, e->versions[v].sha1); - c += 20; + strbuf_addf(b, "%o %s%c", (unsigned int)e->versions[v].mode, + e->name->str_dat, '\0'); + strbuf_add(b, e->versions[v].sha1, 20); } - *szp = c - (char*)b->buffer; } static void store_tree(struct tree_entry *root) { struct tree_content *t = root->tree; unsigned int i, j, del; - unsigned long new_len; - struct last_object lo; + struct last_object lo = { STRBUF_INIT, 0, 0, /* no_swap */ 1 }; struct object_entry *le; if (!is_null_sha1(root->versions[1].sha1)) @@ -1145,22 +1412,15 @@ static void store_tree(struct tree_entry *root) } le = find_object(root->versions[0].sha1); - if (!S_ISDIR(root->versions[0].mode) - || !le - || le->pack_id != pack_id) { - lo.data = NULL; - lo.depth = 0; - } else { - mktree(t, 0, &lo.len, &old_tree); - lo.data = old_tree.buffer; - lo.offset = le->offset; + 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; - lo.no_free = 1; } - mktree(t, 1, &new_len, &new_tree); - store_object(OBJ_TREE, new_tree.buffer, new_len, - &lo, root->versions[1].sha1, 0); + 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++) { @@ -1181,7 +1441,8 @@ static int tree_content_set( struct tree_entry *root, const char *p, const unsigned char *sha1, - const uint16_t mode) + const uint16_t mode, + struct tree_content *subtree) { struct tree_content *t = root->tree; const char *slash1; @@ -1193,20 +1454,24 @@ static int tree_content_set( 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"); for (i = 0; i < t->entry_count; i++) { e = t->entries[i]; if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) { if (!slash1) { - if (e->versions[1].mode == mode + 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) { + if (e->tree) release_tree_content_recursive(e->tree); - e->tree = NULL; - } + e->tree = subtree; hashclr(root->versions[1].sha1); return 1; } @@ -1216,7 +1481,7 @@ static int tree_content_set( } if (!e->tree) load_tree(e); - if (tree_content_set(e, slash1 + 1, sha1, mode)) { + if (tree_content_set(e, slash1 + 1, sha1, mode, subtree)) { hashclr(root->versions[1].sha1); return 1; } @@ -1225,18 +1490,18 @@ static int tree_content_set( } if (t->entry_count == t->entry_capacity) - root->tree = t = grow_tree_content(t, 8); + root->tree = t = grow_tree_content(t, t->entry_count); e = new_tree_entry(); - e->name = to_atom(p, (unsigned short)n); + 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); + tree_content_set(e, slash1 + 1, sha1, mode, subtree); } else { - e->tree = NULL; + e->tree = subtree; e->versions[1].mode = mode; hashcpy(e->versions[1].sha1, sha1); } @@ -1244,7 +1509,10 @@ static int tree_content_set( return 1; } -static int tree_content_remove(struct tree_entry *root, const char *p) +static int tree_content_remove( + struct tree_entry *root, + const char *p, + struct tree_entry *backup_leaf) { struct tree_content *t = root->tree; const char *slash1; @@ -1264,13 +1532,14 @@ static int tree_content_remove(struct tree_entry *root, const char *p) goto del_entry; if (!e->tree) load_tree(e); - if (tree_content_remove(e, slash1 + 1)) { + if (tree_content_remove(e, slash1 + 1, backup_leaf)) { 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; @@ -1279,25 +1548,65 @@ static int tree_content_remove(struct tree_entry *root, const char *p) return 0; del_entry: - if (e->tree) { + if (backup_leaf) + memcpy(backup_leaf, e, sizeof(*backup_leaf)); + else if (e->tree) release_tree_content_recursive(e->tree); - e->tree = NULL; - } + 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) +{ + struct tree_content *t = root->tree; + const char *slash1; + unsigned int i, n; + struct tree_entry *e; + + slash1 = strchr(p, '/'); + if (slash1) + n = slash1 - p; + else + n = strlen(p); + + for (i = 0; i < t->entry_count; i++) { + e = t->entries[i]; + if (e->name->str_len == n && !strncmp(p, e->name->str_dat, n)) { + if (!slash1) { + 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; + } + if (!S_ISDIR(e->versions[1].mode)) + return 0; + if (!e->tree) + load_tree(e); + return tree_content_get(e, slash1 + 1, leaf); + } + } + return 0; +} + 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); + lock = lock_any_ref_for_update(b->name, old_sha1, 0); if (!lock) return error("Unable to lock %s", b->name); if (!force_update && !is_null_sha1(old_sha1)) { @@ -1312,7 +1621,7 @@ static int update_branch(struct branch *b) if (!in_merge_bases(old_cmit, &new_cmit, 1)) { unlock_ref(lock); - warn("Not updating %s" + 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; @@ -1357,38 +1666,159 @@ static void dump_marks_helper(FILE *f, if (m->shift) { for (k = 0; k < 1024; k++) { if (m->data.sets[k]) - dump_marks_helper(f, (base + k) << m->shift, + 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]->sha1)); + sha1_to_hex(m->data.marked[k]->idx.sha1)); } } } static void dump_marks(void) { - if (mark_file) - { - FILE *f = fopen(mark_file, "w"); - if (f) { - dump_marks_helper(f, 0, marks); - fclose(f); - } else - failure |= error("Unable to write marks file %s: %s", - mark_file, strerror(errno)); + 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) + 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(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; } + + do { + 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 + && prefixcmp(command_buf.buf, "feature ") + && prefixcmp(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; + } + } while (command_buf.buf[0] == '#'); + + return 0; } -static void read_next_command(void) +static void skip_optional_lf(void) { - read_line(&command_buf, stdin, '\n'); + int term_char = fgetc(stdin); + if (term_char != '\n' && term_char != EOF) + ungetc(term_char, stdin); } -static void cmd_mark(void) +static void parse_mark(void) { if (!prefixcmp(command_buf.buf, "mark :")) { next_mark = strtoumax(command_buf.buf + 6, NULL, 10); @@ -1398,46 +1828,42 @@ static void cmd_mark(void) next_mark = 0; } -static void *cmd_data (size_t *size) +static int parse_data(struct strbuf *sb, uintmax_t limit, uintmax_t *len_res) { - size_t length; - char *buffer; + strbuf_reset(sb); if (prefixcmp(command_buf.buf, "data ")) die("Expected 'data n' command, found: %s", command_buf.buf); if (!prefixcmp(command_buf.buf + 5, "<<")) { char *term = xstrdup(command_buf.buf + 5 + 2); - size_t sz = 8192, term_len = command_buf.len - 5 - 2; - length = 0; - buffer = xmalloc(sz); + size_t term_len = command_buf.len - 5 - 2; + + strbuf_detach(&command_buf, NULL); for (;;) { - read_next_command(); - if (command_buf.eof) + 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; - if (sz < (length + command_buf.len)) { - sz = sz * 3 / 2 + 16; - if (sz < (length + command_buf.len)) - sz = length + command_buf.len; - buffer = xrealloc(buffer, sz); - } - memcpy(buffer + length, - command_buf.buf, - command_buf.len - 1); - length += command_buf.len - 1; - buffer[length++] = '\n'; + strbuf_addbuf(sb, &command_buf); + strbuf_addch(sb, '\n'); } free(term); } else { - size_t n = 0; - length = strtoul(command_buf.buf + 5, NULL, 10); - buffer = xmalloc(length); + 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 = fread(buffer + n, 1, length - n, stdin); + size_t s = strbuf_fread(sb, length - n, stdin); if (!s && feof(stdin)) die("EOF in data (%lu bytes remaining)", (unsigned long)(length - n)); @@ -1445,29 +1871,30 @@ static void *cmd_data (size_t *size) } } - if (fgetc(stdin) != '\n') - die("An lf did not trail the binary data as expected."); - - *size = length; - return buffer; + skip_optional_lf(); + return 1; } static int validate_raw_date(const char *src, char *result, int maxlen) { const char *orig_src = src; - char *endp, sign; + char *endp; + unsigned long num; + + errno = 0; - strtoul(src, &endp, 10); - if (endp == src || *endp != ' ') + 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; - sign = *src; - strtoul(src + 1, &endp, 10); - if (endp == src || *endp || (endp - orig_src) >= maxlen) + num = strtoul(src + 1, &endp, 10); + if (errno || endp == src + 1 || *endp || (endp - orig_src) >= maxlen || + 1400 < num) return -1; strcpy(result, orig_src); @@ -1510,17 +1937,32 @@ static char *parse_ident(const char *buf) return ident; } -static void cmd_new_blob(void) +static void parse_and_store_blob( + struct last_object *last, + unsigned char *sha1out, + uintmax_t mark) { - size_t l; - void *d; + static struct strbuf buf = STRBUF_INIT; + uintmax_t len; - read_next_command(); - cmd_mark(); - d = cmd_data(&l); + 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(); + } +} - if (store_object(OBJ_BLOB, d, l, &last_blob, NULL, next_mark)) - free(d); +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) @@ -1567,10 +2009,113 @@ static void load_branch(struct branch *b) } } +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 */ + 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)) + 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); +} + static void file_change_m(struct branch *b) { const char *p = command_buf.buf + 2; - char *p_uq; + static struct strbuf uq = STRBUF_INIT; const char *endp; struct object_entry *oe = oe; unsigned char sha1[20]; @@ -1580,11 +2125,13 @@ static void file_change_m(struct branch *b) 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 0644: - case 0755: + case S_IFGITLINK: /* ok */ break; default: @@ -1594,7 +2141,7 @@ static void file_change_m(struct branch *b) if (*p == ':') { char *x; oe = find_mark(strtoumax(p + 1, &x, 10)); - hashcpy(sha1, oe->sha1); + hashcpy(sha1, oe->idx.sha1); p = x; } else if (!prefixcmp(p, "inline")) { inline_data = 1; @@ -1608,26 +2155,37 @@ static void file_change_m(struct branch *b) if (*p++ != ' ') die("Missing space after SHA1: %s", command_buf.buf); - p_uq = unquote_c_style(p, &endp); - if (p_uq) { + strbuf_reset(&uq); + if (!unquote_c_style(&uq, p, &endp)) { if (*endp) die("Garbage after path in: %s", command_buf.buf); - p = p_uq; + p = uq.buf; } - if (inline_data) { - size_t l; - void *d; - if (!p_uq) - p = p_uq = xstrdup(p); + 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 (p != uq.buf) { + strbuf_addstr(&uq, p); + p = uq.buf; + } read_next_command(); - d = cmd_data(&l); - if (store_object(OBJ_BLOB, d, l, &last_blob, sha1, 0)) - free(d); + parse_and_store_blob(&last_blob, sha1, 0); } else if (oe) { if (oe->type != OBJ_BLOB) die("Not a blob (actually a %s): %s", - command_buf.buf, typename(oe->type)); + typename(oe->type), command_buf.buf); } else { enum object_type type = sha1_object_info(sha1, NULL); if (type < 0) @@ -1637,24 +2195,150 @@ static void file_change_m(struct branch *b) typename(type), command_buf.buf); } - tree_content_set(&b->branch_tree, p, sha1, S_IFREG | mode); - free(p_uq); + 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; - char *p_uq; + static struct strbuf uq = STRBUF_INIT; const char *endp; - p_uq = unquote_c_style(p, &endp); - if (p_uq) { + strbuf_reset(&uq); + if (!unquote_c_style(&uq, p, &endp)) { if (*endp) die("Garbage after path in: %s", command_buf.buf); - p = p_uq; + p = uq.buf; + } + tree_content_remove(&b->branch_tree, p, NULL); +} + +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); + else + tree_content_get(&b->branch_tree, s, &leaf); + if (!leaf.versions[1].mode) + die("Path %s not in branch", s); + 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 = oe; + struct branch *s; + unsigned char sha1[20], commit_sha1[20]; + char path[60]; + uint16_t inline_data = 0; + unsigned char new_fanout; + + /* <dataref> or 'inline' */ + if (*p == ':') { + char *x; + oe = find_mark(strtoumax(p + 1, &x, 10)); + hashcpy(sha1, oe->idx.sha1); + p = x; + } else if (!prefixcmp(p, "inline")) { + inline_data = 1; + p += 6; + } else { + if (get_sha1_hex(p, sha1)) + die("Invalid SHA1: %s", command_buf.buf); + oe = find_object(sha1); + p += 40; } - tree_content_remove(&b->branch_tree, p); - free(p_uq); + if (*p++ != ' ') + die("Missing space after SHA1: %s", command_buf.buf); + + /* <committish> */ + s = lookup_branch(p); + if (s) { + hashcpy(commit_sha1, s->sha1); + } else if (*p == ':') { + uintmax_t commit_mark = strtoumax(p + 1, NULL, 10); + 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)) + 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) @@ -1663,15 +2347,43 @@ static void file_change_deleteall(struct branch *b) 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 void cmd_from(struct branch *b) +static int parse_from(struct branch *b) { const char *from; struct branch *s; if (prefixcmp(command_buf.buf, "from ")) - return; + return 0; if (b->branch_tree.tree) { release_tree_content_recursive(b->branch_tree.tree); @@ -1690,46 +2402,26 @@ static void cmd_from(struct branch *b) } else if (*from == ':') { uintmax_t idnum = strtoumax(from + 1, NULL, 10); struct object_entry *oe = find_mark(idnum); - unsigned long size; - char *buf; if (oe->type != OBJ_COMMIT) die("Mark :%" PRIuMAX " not a commit", idnum); - hashcpy(b->sha1, oe->sha1); - buf = gfi_unpack_entry(oe, &size); - if (!buf || size < 46) - die("Not a valid commit: %s", from); - 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)); - free(buf); - hashcpy(b->branch_tree.versions[0].sha1, - b->branch_tree.versions[1].sha1); - } else if (!get_sha1(from, b->sha1)) { - if (is_null_sha1(b->sha1)) { - hashclr(b->branch_tree.versions[0].sha1); - hashclr(b->branch_tree.versions[1].sha1); - } else { + hashcpy(b->sha1, oe->idx.sha1); + if (oe->pack_id != MAX_PACK_ID) { unsigned long size; - char *buf; - - buf = read_object_with_reference(b->sha1, - commit_type, &size, b->sha1); - if (!buf || size < 46) - die("Not a valid commit: %s", from); - 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)); + char *buf = gfi_unpack_entry(oe, &size); + parse_from_commit(b, buf, size); free(buf); - hashcpy(b->branch_tree.versions[0].sha1, - b->branch_tree.versions[1].sha1); - } - } else + } 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 *cmd_merge(unsigned int *count) +static struct hash_list *parse_merge(unsigned int *count) { struct hash_list *list = NULL, *n, *e = e; const char *from; @@ -1747,7 +2439,7 @@ static struct hash_list *cmd_merge(unsigned int *count) struct object_entry *oe = find_mark(idnum); if (oe->type != OBJ_COMMIT) die("Mark :%" PRIuMAX " not a commit", idnum); - hashcpy(n->sha1, oe->sha1); + hashcpy(n->sha1, oe->idx.sha1); } else if (!get_sha1(from, n->sha1)) { unsigned long size; char *buf = read_object_with_reference(n->sha1, @@ -1770,16 +2462,16 @@ static struct hash_list *cmd_merge(unsigned int *count) return list; } -static void cmd_new_commit(void) +static void parse_new_commit(void) { + static struct strbuf msg = STRBUF_INIT; struct branch *b; - void *msg; - size_t msglen; 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; @@ -1788,7 +2480,7 @@ static void cmd_new_commit(void) b = new_branch(sp); read_next_command(); - cmd_mark(); + parse_mark(); if (!prefixcmp(command_buf.buf, "author ")) { author = parse_ident(command_buf.buf + 7); read_next_command(); @@ -1799,10 +2491,10 @@ static void cmd_new_commit(void) } if (!committer) die("Expected committer but didn't get one"); - msg = cmd_data(&msglen); + parse_data(&msg, 0, NULL); read_next_command(); - cmd_from(b); - merge_list = cmd_merge(&merge_count); + parse_from(b); + merge_list = parse_merge(&merge_count); /* ensure the branch is active/loaded */ if (!b->branch_tree.tree || !max_active_branches) { @@ -1810,68 +2502,75 @@ static void cmd_new_commit(void) load_branch(b); } + prev_fanout = convert_num_notes_to_fanout(b->num_notes); + /* file_change* */ - for (;;) { - if (1 == command_buf.len) - break; - else if (!prefixcmp(command_buf.buf, "M ")) + while (command_buf.len > 0) { + if (!prefixcmp(command_buf.buf, "M ")) file_change_m(b); else if (!prefixcmp(command_buf.buf, "D ")) file_change_d(b); + else if (!prefixcmp(command_buf.buf, "R ")) + file_change_cr(b, 1); + else if (!prefixcmp(command_buf.buf, "C ")) + file_change_cr(b, 0); + else if (!prefixcmp(command_buf.buf, "N ")) + note_change_n(b, prev_fanout); else if (!strcmp("deleteall", command_buf.buf)) file_change_deleteall(b); - else - die("Unsupported file_change: %s", command_buf.buf); - read_next_command(); + 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); - size_dbuf(&new_data, 114 + msglen - + merge_count * 49 - + (author - ? strlen(author) + strlen(committer) - : 2 * strlen(committer))); - sp = new_data.buffer; - sp += sprintf(sp, "tree %s\n", + + 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)) - sp += sprintf(sp, "parent %s\n", sha1_to_hex(b->sha1)); + strbuf_addf(&new_data, "parent %s\n", sha1_to_hex(b->sha1)); while (merge_list) { struct hash_list *next = merge_list->next; - sp += sprintf(sp, "parent %s\n", sha1_to_hex(merge_list->sha1)); + strbuf_addf(&new_data, "parent %s\n", sha1_to_hex(merge_list->sha1)); free(merge_list); merge_list = next; } - sp += sprintf(sp, "author %s\n", author ? author : committer); - sp += sprintf(sp, "committer %s\n", committer); - *sp++ = '\n'; - memcpy(sp, msg, msglen); - sp += msglen; + strbuf_addf(&new_data, + "author %s\n" + "committer %s\n" + "\n", + author ? author : committer, committer); + strbuf_addbuf(&new_data, &msg); free(author); free(committer); - free(msg); - if (!store_object(OBJ_COMMIT, - new_data.buffer, sp - (char*)new_data.buffer, - NULL, b->sha1, next_mark)) + 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 cmd_new_tag(void) +static void parse_new_tag(void) { + static struct strbuf msg = STRBUF_INIT; char *sp; const char *from; char *tagger; struct branch *s; - void *msg; - size_t msglen; 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; @@ -1892,19 +2591,18 @@ static void cmd_new_tag(void) s = lookup_branch(from); if (s) { hashcpy(sha1, s->sha1); + type = OBJ_COMMIT; } else if (*from == ':') { struct object_entry *oe; from_mark = strtoumax(from + 1, NULL, 10); oe = find_mark(from_mark); - if (oe->type != OBJ_COMMIT) - die("Mark :%" PRIuMAX " not a commit", from_mark); - hashcpy(sha1, oe->sha1); + type = oe->type; + hashcpy(sha1, oe->idx.sha1); } else if (!get_sha1(from, sha1)) { unsigned long size; char *buf; - buf = read_object_with_reference(sha1, - commit_type, &size, sha1); + buf = read_sha1_file(sha1, &type, &size); if (!buf || size < 46) die("Not a valid commit: %s", from); free(buf); @@ -1913,36 +2611,37 @@ static void cmd_new_tag(void) read_next_command(); /* tagger ... */ - if (prefixcmp(command_buf.buf, "tagger ")) - die("Expected tagger command, got %s", command_buf.buf); - tagger = parse_ident(command_buf.buf + 7); + if (!prefixcmp(command_buf.buf, "tagger ")) { + tagger = parse_ident(command_buf.buf + 7); + read_next_command(); + } else + tagger = NULL; /* tag payload/message */ - read_next_command(); - msg = cmd_data(&msglen); + parse_data(&msg, 0, NULL); /* build the tag object */ - size_dbuf(&new_data, 67+strlen(t->name)+strlen(tagger)+msglen); - sp = new_data.buffer; - sp += sprintf(sp, "object %s\n", sha1_to_hex(sha1)); - sp += sprintf(sp, "type %s\n", commit_type); - sp += sprintf(sp, "tag %s\n", t->name); - sp += sprintf(sp, "tagger %s\n", tagger); - *sp++ = '\n'; - memcpy(sp, msg, msglen); - sp += msglen; + 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); - free(msg); - if (store_object(OBJ_TAG, new_data.buffer, - sp - (char*)new_data.buffer, - NULL, t->sha1, 0)) + 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 cmd_reset_branch(void) +static void parse_reset_branch(void) { struct branch *b; char *sp; @@ -1962,10 +2661,12 @@ static void cmd_reset_branch(void) else b = new_branch(sp); read_next_command(); - cmd_from(b); + parse_from(b); + if (command_buf.len > 0) + unread_command_buf = 1; } -static void cmd_checkpoint(void) +static void parse_checkpoint(void) { if (object_count) { cycle_packfile(); @@ -1973,86 +2674,289 @@ static void cmd_checkpoint(void) dump_tags(); dump_marks(); } - read_next_command(); + skip_optional_lf(); } -static const char fast_import_usage[] = -"git-fast-import [--date-format=f] [--max-pack-size=n] [--depth=n] [--active-branches=n] [--export-marks=marks.file]"; +static void parse_progress(void) +{ + fwrite(command_buf.buf, 1, command_buf.len, stdout); + fputc('\n', stdout); + fflush(stdout); + skip_optional_lf(); +} -int main(int argc, const char **argv) +static char* make_fast_import_path(const char *path) { - int i, show_stats = 1; + struct strbuf abs_path = STRBUF_INIT; - git_config(git_default_config); + 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); +} - for (i = 1; i < argc; i++) { - const char *a = argv[i]; +static void option_import_marks(const char *marks, int from_stream) +{ + 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; +} + +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 void option_depth(const char *depth) +{ + max_depth = strtoul(depth, NULL, 0); + if (max_depth > MAX_DEPTH) + die("--depth cannot exceed %u", MAX_DEPTH); +} + +static void option_active_branches(const char *branches) +{ + max_active_branches = strtoul(branches, NULL, 0); +} + +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_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 (!prefixcmp(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 (!prefixcmp(option, "big-file-threshold=")) { + unsigned long v; + if (!git_parse_ulong(option + 19, &v)) + return 0; + big_file_threshold = v; + } else if (!prefixcmp(option, "depth=")) { + option_depth(option + 6); + } else if (!prefixcmp(option, "active-branches=")) { + option_active_branches(option + 16); + } else if (!prefixcmp(option, "export-pack-edges=")) { + option_export_pack_edges(option + 18); + } else if (!prefixcmp(option, "quiet")) { + show_stats = 0; + } else if (!prefixcmp(option, "stats")) { + show_stats = 1; + } else { + return 0; + } + + return 1; +} + +static int parse_one_feature(const char *feature, int from_stream) +{ + if (!prefixcmp(feature, "date-format=")) { + option_date_format(feature + 12); + } else if (!prefixcmp(feature, "import-marks=")) { + option_import_marks(feature + 13, from_stream); + } else if (!prefixcmp(feature, "export-marks=")) { + option_export_marks(feature + 13); + } else if (!prefixcmp(feature, "relative-marks")) { + relative_marks_paths = 1; + } else if (!prefixcmp(feature, "no-relative-marks")) { + relative_marks_paths = 0; + } else if (!prefixcmp(feature, "force")) { + force_update = 1; + } 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_default_version = git_config_int(k, v); + if (pack_idx_default_version > 2) + die("bad pack.indexversion=%"PRIu32, + pack_idx_default_version); + return 0; + } + if (!strcmp(k, "pack.packsizelimit")) { + max_packsize = git_config_ulong(k, v); + return 0; + } + if (!strcmp(k, "core.bigfilethreshold")) { + long n = git_config_int(k, v); + big_file_threshold = 0 < n ? n : 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; - else if (!prefixcmp(a, "--date-format=")) { - const char *fmt = a + 14; - 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); - } - else if (!prefixcmp(a, "--max-pack-size=")) - max_packsize = strtoumax(a + 16, NULL, 0) * 1024 * 1024; - else if (!prefixcmp(a, "--depth=")) - max_depth = strtoul(a + 8, NULL, 0); - else if (!prefixcmp(a, "--active-branches=")) - max_active_branches = strtoul(a + 18, NULL, 0); - else if (!prefixcmp(a, "--export-marks=")) - mark_file = a + 15; - else if (!prefixcmp(a, "--export-pack-edges=")) { - if (pack_edges) - fclose(pack_edges); - pack_edges = fopen(a + 20, "a"); - if (!pack_edges) - die("Cannot open %s: %s", a + 20, strerror(errno)); - } else if (!strcmp(a, "--force")) - force_update = 1; - else if (!strcmp(a, "--quiet")) - show_stats = 0; - else if (!strcmp(a, "--stats")) - show_stats = 1; - else - die("unknown option %s", a); + + if (parse_one_option(a + 2)) + continue; + + if (parse_one_feature(a + 2, 0)) + continue; + + die("unknown option %s", a); } - if (i != argc) + if (i != global_argc) usage(fast_import_usage); - alloc_objects(object_entry_alloc); - strbuf_init(&command_buf); + seen_data_command = 1; + if (import_marks_file) + read_marks(); +} +int main(int argc, const char **argv) +{ + unsigned int i; + + git_extract_argv0_path(argv[0]); + + if (argc == 2 && !strcmp(argv[1], "-h")) + usage(fast_import_usage); + + setup_git_directory(); + 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(); - for (;;) { - read_next_command(); - if (command_buf.eof) - break; - else if (!strcmp("blob", command_buf.buf)) - cmd_new_blob(); + set_die_routine(die_nicely); + while (read_next_command() != EOF) { + if (!strcmp("blob", command_buf.buf)) + parse_new_blob(); else if (!prefixcmp(command_buf.buf, "commit ")) - cmd_new_commit(); + parse_new_commit(); else if (!prefixcmp(command_buf.buf, "tag ")) - cmd_new_tag(); + parse_new_tag(); else if (!prefixcmp(command_buf.buf, "reset ")) - cmd_reset_branch(); + parse_reset_branch(); else if (!strcmp("checkpoint", command_buf.buf)) - cmd_checkpoint(); + parse_checkpoint(); + else if (!prefixcmp(command_buf.buf, "progress ")) + parse_progress(); + else if (!prefixcmp(command_buf.buf, "feature ")) + parse_feature(); + else if (!prefixcmp(command_buf.buf, "option git ")) + parse_option(); + else if (!prefixcmp(command_buf.buf, "option ")) + /* ignore non-git options*/; else die("Unsupported command: %s", command_buf.buf); } + + /* argv hasn't been parsed yet, do so */ + if (!seen_data_command) + parse_argv(); + end_packfile(); dump_branches(); |