diff options
Diffstat (limited to 'fast-import.c')
| -rw-r--r-- | fast-import.c | 178 |
1 files changed, 172 insertions, 6 deletions
diff --git a/fast-import.c b/fast-import.c index b3ba778924..65d65bf8f9 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 @@ -132,7 +134,7 @@ Format of STDIN stream: ts ::= # time since the epoch in seconds, ascii base10 notation; tz ::= # GIT style timezone; - # note: comments and cat requests may appear anywhere + # 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. @@ -141,7 +143,9 @@ Format of STDIN stream: # 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); @@ -315,6 +319,7 @@ 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 */ @@ -359,6 +364,7 @@ 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) { @@ -1782,7 +1788,11 @@ 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; @@ -2596,6 +2606,8 @@ 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; @@ -2819,6 +2831,153 @@ static void parse_cat_blob(void) 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, 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; @@ -2854,7 +3013,8 @@ 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) @@ -2868,6 +3028,7 @@ 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) @@ -2967,7 +3128,10 @@ 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")) { @@ -2978,7 +3142,7 @@ static int parse_one_feature(const char *feature, int from_stream) relative_marks_paths = 0; } else if (!prefixcmp(feature, "force")) { force_update = 1; - } else if (!strcmp(feature, "notes")) { + } else if (!strcmp(feature, "notes") || !strcmp(feature, "ls")) { ; /* do nothing; we have the feature */ } else { return 0; @@ -3119,6 +3283,8 @@ int main(int argc, const char **argv) 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 ")) |