X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=fast-import.c;h=e1268b8cb4ae2ac482928b23e6a3a04bf78c7fcb;hb=6908e999468d7eb531a1609cee37673c5d3ca04f;hp=613623be14c4c647e11b20fefb382b3f7438fb3c;hpb=14154ce3caaf572aed3c26fd52c389bd13a9c688;p=git.git diff --git a/fast-import.c b/fast-import.c index 613623be1..e1268b8cb 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); */ @@ -156,6 +163,7 @@ 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<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"); + 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, @@ -1439,7 +1496,7 @@ 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; @@ -1454,9 +1511,12 @@ 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 @@ -1509,7 +1569,7 @@ 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; @@ -1520,9 +1580,12 @@ 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 @@ -1567,7 +1630,7 @@ 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; @@ -1578,9 +1641,12 @@ 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)) @@ -1735,7 +1801,11 @@ 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; @@ -1776,7 +1846,7 @@ static int read_next_command(void) return EOF; } - do { + for (;;) { if (unread_command_buf) { unread_command_buf = 0; } else { @@ -1809,9 +1879,14 @@ 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) @@ -2166,6 +2241,12 @@ 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", @@ -2204,6 +2285,10 @@ static void file_change_m(struct branch *b) 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); } @@ -2262,6 +2347,13 @@ 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, @@ -2527,6 +2619,8 @@ static void parse_new_commit(void) 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; @@ -2675,14 +2769,242 @@ 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); + free(buf); +} + +static void parse_cat_blob(void) +{ + const char *p; + struct object_entry *oe = oe; + unsigned char sha1[20]; + + /* cat-blob SP 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 == ':') { /* */ + 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 { /* */ + 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, 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 = {0}; + + /* ls SP ( SP)? */ + 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(); } @@ -2704,7 +3026,8 @@ 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) @@ -2718,6 +3041,7 @@ 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) @@ -2732,16 +3056,25 @@ static void option_date_format(const char *fmt) die("unknown --date-format argument %s", fmt); } +static unsigned long ulong_arg(const char *option, const char *arg) +{ + char *endptr; + unsigned long rv = strtoul(arg, &endptr, 0); + if (strchr(arg, '-') || endptr == arg || *endptr) + die("%s: argument must be a non-negative integer", option); + return rv; +} + static void option_depth(const char *depth) { - max_depth = 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) @@ -2750,6 +3083,14 @@ static void option_export_marks(const char *marks) safe_create_leading_directories_const(export_marks_file); } +static void option_cat_blob_fd(const char *fd) +{ + unsigned long n = ulong_arg("--cat-blob-fd", fd); + if (n > (unsigned long) INT_MAX) + die("--cat-blob-fd cannot exceed %d", INT_MAX); + cat_blob_fd = (int) n; +} + static void option_export_pack_edges(const char *edges) { if (pack_edges) @@ -2800,15 +3141,22 @@ 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 (!strcmp(feature, "cat-blob")) { + ; /* Don't die - this feature is supported */ } 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 if (!strcmp(feature, "notes") || !strcmp(feature, "ls")) { + ; /* do nothing; we have the feature */ } else { return 0; } @@ -2897,6 +3245,11 @@ 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) @@ -2939,9 +3292,12 @@ 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 ")) @@ -2960,6 +3316,9 @@ 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 */