diff options
Diffstat (limited to 'fast-import.c')
| -rw-r--r-- | fast-import.c | 1141 |
1 files changed, 891 insertions, 250 deletions
diff --git a/fast-import.c b/fast-import.c index 52d33bcba8..8d8ea3c45c 100644 --- a/fast-import.c +++ b/fast-import.c @@ -24,10 +24,12 @@ Format of STDIN stream: commit_msg ('from' sp committish lf)? ('merge' sp committish lf)* - file_change* + (file_change | ls)* lf?; commit_msg ::= data; + ls ::= 'ls' sp '"' quoted(path) '"' lf; + file_change ::= file_clr | file_del | file_rnm @@ -132,14 +134,19 @@ Format of STDIN stream: 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. + # 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); */ @@ -156,32 +163,34 @@ Format of STDIN stream: #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) -struct object_entry -{ +/* + * 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 offset; uint32_t type : TYPE_BITS, pack_id : PACK_ID_BITS, depth : DEPTH_BITS; - unsigned char sha1[20]; }; -struct object_entry_pool -{ +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 -{ +struct mark_set { union { struct object_entry *marked[1024]; struct mark_set *sets[1024]; @@ -189,77 +198,68 @@ struct mark_set unsigned int shift; }; -struct last_object -{ +struct last_object { struct strbuf data; - uint32_t offset; + off_t offset; unsigned int depth; unsigned no_swap : 1; }; -struct mem_pool -{ +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 { struct atom_str *next_atom; unsigned short str_len; char str_dat[FLEX_ARRAY]; /* more */ }; struct tree_content; -struct tree_entry -{ +struct tree_entry { struct tree_content *tree; struct atom_str *name; - struct tree_entry_ms - { + struct tree_entry_ms { uint16_t mode; unsigned char sha1[20]; } versions[2]; }; -struct tree_content -{ +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 -{ +struct avail_tree_content { unsigned int entry_capacity; /* must match tree_content */ struct avail_tree_content *next_avail; }; -struct branch -{ +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 { struct tag *next_tag; const char *name; unsigned int pack_id; unsigned char sha1[20]; }; -struct hash_list -{ +struct hash_list { struct hash_list *next; unsigned char sha1[20]; }; @@ -267,11 +267,10 @@ struct hash_list typedef enum { WHENSPEC_RAW = 1, WHENSPEC_RFC2822, - WHENSPEC_NOW, + WHENSPEC_NOW } whenspec_type; -struct recent_command -{ +struct recent_command { struct recent_command *prev; struct recent_command *next; char *buf; @@ -279,7 +278,7 @@ struct recent_command /* Configured limits on output */ static unsigned long max_depth = 10; -static off_t max_packsize = (1LL << 32) - 1; +static off_t max_packsize; static int force_update; static int pack_compression_level = Z_DEFAULT_COMPRESSION; static int pack_compression_seen; @@ -290,6 +289,7 @@ 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; @@ -310,10 +310,12 @@ 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 unsigned long pack_size; +static off_t pack_size; /* Table of objects we've written. */ static unsigned int object_entry_alloc = 5000; @@ -323,6 +325,7 @@ 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 */ @@ -358,8 +361,17 @@ 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) { @@ -498,6 +510,32 @@ static NORETURN void die_nicely(const char *err, va_list params) 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; @@ -519,7 +557,7 @@ 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; } @@ -528,7 +566,7 @@ 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; } @@ -537,22 +575,17 @@ static struct object_entry *insert_object(unsigned char *sha1) { unsigned int h = sha1[0] << 8 | sha1[1]; struct object_entry *e = object_table[h]; - 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; } e = new_object(sha1); - e->next = NULL; - e->offset = 0; - if (p) - p->next = e; - else - object_table[h] = e; + e->next = object_table[h]; + e->idx.offset = 0; + object_table[h] = e; return e; } @@ -689,19 +722,15 @@ static struct branch *new_branch(const char *name) if (b) die("Invalid attempt to create duplicate branch: %s", name); - switch (check_ref_format(name)) { - case 0: break; /* its valid */ - case CHECK_REF_FORMAT_ONELEVEL: - break; /* valid, but too few '/', allow anyway */ - default: + 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; @@ -836,11 +865,13 @@ static void start_packfile(void) p = xcalloc(1, sizeof(*p) + strlen(tmpfile) + 2); strcpy(p->pack_name, tmpfile); 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; - write_or_die(p->pack_fd, &hdr, sizeof(hdr)); + sha1write(pack_file, &hdr, sizeof(hdr)); pack_data = p; pack_size = sizeof(hdr); @@ -850,67 +881,30 @@ static void start_packfile(void) all_packs[pack_id] = p; } -static int oecmp (const void *a_, const void *b_) +static const char *create_index(void) { - 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]; - git_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; - } - - idx_fd = odb_mkstemp(tmpfile, sizeof(tmpfile), - "pack/tmp_idx_XXXXXX"); - f = sha1fd(idx_fd, tmpfile); - sha1write(f, array, 256 * sizeof(int)); - git_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)); - git_SHA1_Update(&ctx, (*c)->sha1, 20); - } - sha1write(f, pack_data->sha1, sizeof(pack_data->sha1)); - sha1close(f, NULL, CSUM_FSYNC); + tmpfile = write_idx_file(NULL, idx, object_count, &pack_idx_opts, pack_data->sha1); free(idx); - git_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"; @@ -932,6 +926,7 @@ 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; } @@ -954,15 +949,17 @@ static void end_packfile(void) 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, - NULL, 0); + cur_pack_sha1, pack_size); close(pack_data->pack_fd); idx_name = keep_pack(create_index()); @@ -1010,29 +1007,6 @@ 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, struct strbuf *dat, @@ -1046,7 +1020,7 @@ static int store_object( unsigned char sha1[20]; unsigned long hdrlen, deltalen; git_SHA_CTX c; - z_stream s; + git_zstream s; hdrlen = sprintf((char *)hdr,"%s %lu", typename(type), (unsigned long)dat->len) + 1; @@ -1060,30 +1034,27 @@ static int store_object( 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->offset = 1; /* just not zero! */ + e->idx.offset = 1; /* just not zero! */ duplicate_count_by_type[type]++; return 1; } - if (last && last->data.buf && last->depth < max_depth) { + 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, 0); - if (delta && deltalen >= dat->len) { - free(delta); - delta = NULL; - } + &deltalen, dat->len - 20); } else delta = NULL; memset(&s, 0, sizeof(s)); - deflateInit(&s, pack_compression_level); + git_deflate_init(&s, pack_compression_level); if (delta) { s.next_in = delta; s.avail_in = deltalen; @@ -1091,14 +1062,14 @@ static int store_object( s.next_in = (void *)dat->buf; s.avail_in = dat->len; } - s.avail_out = deflateBound(&s, s.avail_in); + s.avail_out = git_deflate_bound(&s, s.avail_in); s.next_out = out = xmalloc(s.avail_out); - while (deflate(&s, Z_FINISH) == Z_OK) - /* nothing */; - deflateEnd(&s); + while (git_deflate(&s, Z_FINISH) == Z_OK) + ; /* nothing */ + git_deflate_end(&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. */ @@ -1111,49 +1082,53 @@ static int store_object( delta = NULL; memset(&s, 0, sizeof(s)); - deflateInit(&s, pack_compression_level); + git_deflate_init(&s, pack_compression_level); s.next_in = (void *)dat->buf; s.avail_in = dat->len; - s.avail_out = deflateBound(&s, s.avail_in); + s.avail_out = git_deflate_bound(&s, s.avail_in); s.next_out = out = xrealloc(out, s.avail_out); - while (deflate(&s, Z_FINISH) == Z_OK) - /* nothing */; - deflateEnd(&s); + while (git_deflate(&s, Z_FINISH) == Z_OK) + ; /* nothing */ + git_deflate_end(&s); } } 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]++; 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 { e->depth = 0; - hdrlen = encode_header(type, dat->len, hdr); - write_or_die(pack_data->pack_fd, hdr, hdrlen); + 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) { @@ -1162,12 +1137,137 @@ static int store_object( } else { strbuf_swap(&last->data, dat); } - last->offset = e->offset; + 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; + git_zstream 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)); + 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(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 @@ -1202,6 +1302,7 @@ static void *gfi_unpack_entry( * 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 @@ -1211,7 +1312,7 @@ static void *gfi_unpack_entry( */ 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) @@ -1317,8 +1418,9 @@ static void mktree(struct tree_content *t, int v, struct strbuf *b) 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, - e->name->str_dat, '\0'); + 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); } } @@ -1328,7 +1430,7 @@ 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; + struct object_entry *le = NULL; if (!is_null_sha1(root->versions[1].sha1)) return; @@ -1338,11 +1440,12 @@ static void store_tree(struct tree_entry *root) store_tree(t->entries[i]); } - le = find_object(root->versions[0].sha1); + 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->offset; + lo.offset = le->idx.offset; lo.depth = t->delta_depth; } @@ -1364,6 +1467,21 @@ static void store_tree(struct tree_entry *root) 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, @@ -1371,7 +1489,7 @@ static int tree_content_set( const uint16_t mode, struct tree_content *subtree) { - struct tree_content *t = root->tree; + struct tree_content *t; const char *slash1; unsigned int i, n; struct tree_entry *e; @@ -1386,9 +1504,12 @@ static int tree_content_set( 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(p, e->name->str_dat, n)) { + 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 @@ -1399,6 +1520,23 @@ static int tree_content_set( 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; } @@ -1441,7 +1579,7 @@ static int tree_content_remove( const char *p, struct tree_entry *backup_leaf) { - struct tree_content *t = root->tree; + struct tree_content *t; const char *slash1; unsigned int i, n; struct tree_entry *e; @@ -1452,9 +1590,20 @@ static int tree_content_remove( else n = strlen(p); + 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(p, e->name->str_dat, n)) { + 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) @@ -1491,7 +1640,7 @@ static int tree_content_get( const char *p, struct tree_entry *leaf) { - struct tree_content *t = root->tree; + struct tree_content *t; const char *slash1; unsigned int i, n; struct tree_entry *e; @@ -1502,9 +1651,12 @@ static int tree_content_get( else n = strlen(p); + 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(p, e->name->str_dat, n)) { + if (e->name->str_len == n && !strncmp_icase(p, e->name->str_dat, n)) { if (!slash1) { memcpy(leaf, e, sizeof(*leaf)); if (e->tree && is_null_sha1(e->versions[1].sha1)) @@ -1593,14 +1745,14 @@ 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)); } } } @@ -1659,7 +1811,11 @@ static void read_marks(void) { char line[512]; FILE *f = fopen(import_marks_file, "r"); - if (!f) + 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; @@ -1683,7 +1839,7 @@ static void read_marks(void) e = insert_object(sha1); e->type = type; e->pack_id = MAX_PACK_ID; - e->offset = 1; /* just not zero! */ + e->idx.offset = 1; /* just not zero! */ } insert_mark(mark, e); } @@ -1700,7 +1856,7 @@ static int read_next_command(void) return EOF; } - do { + for (;;) { if (unread_command_buf) { unread_command_buf = 0; } else { @@ -1733,9 +1889,14 @@ static int read_next_command(void) rc->prev->next = rc; cmd_tail = rc; } - } while (command_buf.buf[0] == '#'); - - return 0; + if (!prefixcmp(command_buf.buf, "cat-blob ")) { + parse_cat_blob(); + continue; + } + if (command_buf.buf[0] == '#') + continue; + return 0; + } } static void skip_optional_lf(void) @@ -1755,7 +1916,7 @@ static void parse_mark(void) next_mark = 0; } -static void parse_data(struct strbuf *sb) +static int parse_data(struct strbuf *sb, uintmax_t limit, uintmax_t *len_res) { strbuf_reset(sb); @@ -1779,9 +1940,15 @@ static void parse_data(struct strbuf *sb) free(term); } else { - size_t n = 0, length; + uintmax_t len = strtoumax(command_buf.buf + 5, NULL, 10); + size_t n = 0, length = (size_t)len; - length = strtoul(command_buf.buf + 5, NULL, 10); + 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); @@ -1793,6 +1960,7 @@ static void parse_data(struct strbuf *sb) } skip_optional_lf(); + return 1; } static int validate_raw_date(const char *src, char *result, int maxlen) @@ -1823,32 +1991,41 @@ static int validate_raw_date(const char *src, char *result, int maxlen) static char *parse_ident(const char *buf) { - const char *gt; + const char *ltgt; size_t name_len; char *ident; - gt = strrchr(buf, '>'); - if (!gt) + /* 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); - gt++; - if (*gt != ' ') + ltgt++; + if (*ltgt != ' ') die("Missing space after > in ident string: %s", buf); - gt++; - name_len = gt - 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(gt, ident + name_len, 24) < 0) - die("Invalid raw date \"%s\" in ident: %s", gt, buf); + 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(gt, ident + name_len, 24) < 0) - die("Invalid rfc2822 date \"%s\" in ident: %s", gt, buf); + 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", gt)) + if (strcmp("now", ltgt)) die("Date in ident must be 'now': %s", buf); datestamp(ident + name_len, 24); break; @@ -1857,14 +2034,32 @@ static char *parse_ident(const char *buf) return ident; } -static void parse_new_blob(void) +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_data(&buf); - store_object(OBJ_BLOB, &buf, &last_blob, NULL, next_mark); + parse_and_store_blob(&last_blob, NULL, next_mark); } static void unload_one_branch(void) @@ -1911,6 +2106,109 @@ 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; @@ -1930,6 +2228,7 @@ static void file_change_m(struct branch *b) case S_IFREG | 0644: case S_IFREG | 0755: case S_IFLNK: + case S_IFDIR: case S_IFGITLINK: /* ok */ break; @@ -1940,7 +2239,7 @@ 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; @@ -1961,6 +2260,12 @@ static void file_change_m(struct branch *b) 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); + return; + } + if (S_ISGITLINK(mode)) { if (inline_data) die("Git links cannot be specified 'inline': %s", @@ -1975,28 +2280,34 @@ static void file_change_m(struct branch *b) * another repository. */ } else if (inline_data) { - static struct strbuf buf = STRBUF_INIT; - + 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_data(&buf); - store_object(OBJ_BLOB, &buf, &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); + parse_and_store_blob(&last_blob, sha1, 0); } else { - enum object_type type = sha1_object_info(sha1, NULL); + 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("Blob not found: %s", command_buf.buf); - if (type != OBJ_BLOB) - die("Not a blob (actually a %s): %s", - typename(type), command_buf.buf); + 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); } @@ -2055,26 +2366,35 @@ static void file_change_cr(struct branch *b, int rename) tree_content_get(&b->branch_tree, s, &leaf); 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) +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->sha1); + hashcpy(sha1, oe->idx.sha1); p = x; } else if (!prefixcmp(p, "inline")) { inline_data = 1; @@ -2091,13 +2411,15 @@ static void note_change_n(struct branch *b) /* <committish> */ 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 = 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->sha1); + 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, @@ -2109,20 +2431,17 @@ static void note_change_n(struct branch *b) die("Invalid ref name or SHA1 expression: %s", p); if (inline_data) { - static struct strbuf buf = STRBUF_INIT; - if (p != uq.buf) { strbuf_addstr(&uq, p); p = uq.buf; } read_next_command(); - parse_data(&buf); - store_object(OBJ_BLOB, &buf, &last_blob, sha1, 0); + 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 { + } 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); @@ -2131,8 +2450,17 @@ static void note_change_n(struct branch *b) typename(type), command_buf.buf); } - tree_content_set(&b->branch_tree, sha1_to_hex(commit_sha1), sha1, - S_IFREG | 0644, NULL); + 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) @@ -2141,6 +2469,7 @@ 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) @@ -2197,7 +2526,7 @@ static int parse_from(struct branch *b) struct object_entry *oe = find_mark(idnum); if (oe->type != OBJ_COMMIT) die("Mark :%" PRIuMAX " not a commit", idnum); - hashcpy(b->sha1, oe->sha1); + hashcpy(b->sha1, oe->idx.sha1); if (oe->pack_id != MAX_PACK_ID) { unsigned long size; char *buf = gfi_unpack_entry(oe, &size); @@ -2232,7 +2561,7 @@ static struct hash_list *parse_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, @@ -2264,6 +2593,7 @@ static void parse_new_commit(void) 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; @@ -2283,7 +2613,7 @@ static void parse_new_commit(void) } if (!committer) die("Expected committer but didn't get one"); - parse_data(&msg); + parse_data(&msg, 0, NULL); read_next_command(); parse_from(b); merge_list = parse_merge(&merge_count); @@ -2294,6 +2624,8 @@ static void parse_new_commit(void) load_branch(b); } + prev_fanout = convert_num_notes_to_fanout(b->num_notes); + /* file_change* */ while (command_buf.len > 0) { if (!prefixcmp(command_buf.buf, "M ")) @@ -2305,9 +2637,11 @@ static void parse_new_commit(void) else if (!prefixcmp(command_buf.buf, "C ")) file_change_cr(b, 0); else if (!prefixcmp(command_buf.buf, "N ")) - note_change_n(b); + note_change_n(b, prev_fanout); else if (!strcmp("deleteall", command_buf.buf)) file_change_deleteall(b); + else if (!prefixcmp(command_buf.buf, "ls ")) + parse_ls(b); else { unread_command_buf = 1; break; @@ -2316,6 +2650,10 @@ static void parse_new_commit(void) 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, @@ -2356,6 +2694,7 @@ static void parse_new_tag(void) 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; @@ -2375,23 +2714,24 @@ static void parse_new_tag(void) 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 = 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); - if (!buf || size < 46) - die("Not a valid commit: %s", from); - free(buf); + 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(); @@ -2404,7 +2744,7 @@ static void parse_new_tag(void) tagger = NULL; /* tag payload/message */ - parse_data(&msg); + parse_data(&msg, 0, NULL); /* build the tag object */ strbuf_reset(&new_data); @@ -2413,7 +2753,7 @@ static void parse_new_tag(void) "object %s\n" "type %s\n" "tag %s\n", - sha1_to_hex(sha1), commit_type, t->name); + sha1_to_hex(sha1), typename(type), t->name); if (tagger) strbuf_addf(&new_data, "tagger %s\n", tagger); @@ -2452,14 +2792,247 @@ static void parse_reset_branch(void) unread_command_buf = 1; } -static void parse_checkpoint(void) +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 == ':') { + char *x; + oe = find_mark(strtoumax(p + 1, &x, 10)); + if (x == p + 1) + die("Invalid mark: %s", command_buf.buf); + if (!oe) + die("Unknown mark: %s", command_buf.buf); + if (*x) + die("Garbage after mark: %s", command_buf.buf); + hashcpy(sha1, oe->idx.sha1); + } else { + if (get_sha1_hex(p, sha1)) + die("Invalid SHA1: %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 treeish: %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> */ + char *endptr; + e = find_mark(strtoumax(*p + 1, &endptr, 10)); + if (endptr == *p + 1) + die("Invalid mark: %s", command_buf.buf); + if (!e) + die("Unknown mark: %s", command_buf.buf); + *p = endptr; + hashcpy(sha1, e->idx.sha1); + } else { /* <sha1> */ + if (get_sha1_hex(*p, sha1)) + die("Invalid SHA1: %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 (<treeish> 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); + 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); + /* + * 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 (!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(); } @@ -2481,7 +3054,8 @@ static char* make_fast_import_path(const char *path) return strbuf_detach(&abs_path, NULL); } -static void option_import_marks(const char *marks, int from_stream) +static void option_import_marks(const char *marks, + int from_stream, int ignore_missing) { if (import_marks_file) { if (from_stream) @@ -2493,7 +3067,9 @@ static void option_import_marks(const char *marks, int from_stream) } 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) @@ -2508,26 +3084,39 @@ static void option_date_format(const char *fmt) die("unknown --date-format argument %s", fmt); } -static void option_max_pack_size(const char *packsize) +static unsigned long ulong_arg(const char *option, const char *arg) { - max_packsize = strtoumax(packsize, NULL, 0) * 1024 * 1024; + 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 = strtoul(depth, NULL, 0); + 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 = strtoul(branches, NULL, 0); + 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) @@ -2542,7 +3131,22 @@ static void option_export_pack_edges(const char *edges) static int parse_one_option(const char *option) { if (!prefixcmp(option, "max-pack-size=")) { - option_max_pack_size(option + 14); + 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=")) { @@ -2565,15 +3169,24 @@ 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); + option_import_marks(feature + 13, from_stream, 0); + } else if (!prefixcmp(feature, "import-marks-if-exists=")) { + option_import_marks(feature + strlen("import-marks-if-exists="), + from_stream, 1); } else if (!prefixcmp(feature, "export-marks=")) { option_export_marks(feature + 13); - } else if (!prefixcmp(feature, "relative-marks")) { + } 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 (!prefixcmp(feature, "no-relative-marks")) { + } else if (!strcmp(feature, "no-relative-marks")) { relative_marks_paths = 0; - } else if (!prefixcmp(feature, "force")) { + } 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; } @@ -2625,11 +3238,22 @@ static int git_pack_config(const char *k, const char *v, void *cb) 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] [--depth=n] [--active-branches=n] [--export-marks=marks.file]"; +"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) { @@ -2647,6 +3271,11 @@ static void parse_argv(void) if (parse_one_feature(a + 2, 0)) continue; + if (!prefixcmp(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) @@ -2667,6 +3296,7 @@ int main(int argc, const char **argv) 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; @@ -2689,9 +3319,12 @@ int main(int argc, const char **argv) 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 (!prefixcmp(command_buf.buf, "ls ")) + parse_ls(NULL); else if (!prefixcmp(command_buf.buf, "commit ")) parse_new_commit(); else if (!prefixcmp(command_buf.buf, "tag ")) @@ -2700,6 +3333,8 @@ int main(int argc, const char **argv) parse_reset_branch(); else if (!strcmp("checkpoint", command_buf.buf)) parse_checkpoint(); + else if (!strcmp("done", command_buf.buf)) + break; else if (!prefixcmp(command_buf.buf, "progress ")) parse_progress(); else if (!prefixcmp(command_buf.buf, "feature ")) @@ -2710,12 +3345,18 @@ int main(int argc, const char **argv) /* 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(); @@ -2737,10 +3378,10 @@ int main(int argc, const char **argv) 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)\n", object_count_by_type[OBJ_BLOB], duplicate_count_by_type[OBJ_BLOB], delta_count_by_type[OBJ_BLOB]); - fprintf(stderr, " trees : %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas)\n", object_count_by_type[OBJ_TREE], duplicate_count_by_type[OBJ_TREE], delta_count_by_type[OBJ_TREE]); - fprintf(stderr, " commits: %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas)\n", object_count_by_type[OBJ_COMMIT], duplicate_count_by_type[OBJ_COMMIT], delta_count_by_type[OBJ_COMMIT]); - fprintf(stderr, " tags : %10" PRIuMAX " (%10" PRIuMAX " duplicates %10" PRIuMAX " deltas)\n", object_count_by_type[OBJ_TAG], duplicate_count_by_type[OBJ_TAG], delta_count_by_type[OBJ_TAG]); + 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); |