| /* |
| * GIT - The information manager from hell |
| * |
| * Copyright (C) Linus Torvalds, 2005 |
| * Copyright (C) Junio C Hamano, 2005 |
| */ |
| #include "builtin.h" |
| #include "config.h" |
| #include "blob.h" |
| #include "quote.h" |
| #include "parse-options.h" |
| #include "exec-cmd.h" |
| |
| /* |
| * This is to create corrupt objects for debugging and as such it |
| * needs to bypass the data conversion performed by, and the type |
| * limitation imposed by, index_fd() and its callees. |
| */ |
| static int hash_literally(struct object_id *oid, int fd, const char *type, unsigned flags) |
| { |
| struct strbuf buf = STRBUF_INIT; |
| int ret; |
| |
| if (strbuf_read(&buf, fd, 4096) < 0) |
| ret = -1; |
| else |
| ret = hash_object_file_literally(buf.buf, buf.len, type, oid, |
| flags); |
| strbuf_release(&buf); |
| return ret; |
| } |
| |
| static void hash_fd(int fd, const char *type, const char *path, unsigned flags, |
| int literally) |
| { |
| struct stat st; |
| struct object_id oid; |
| |
| if (fstat(fd, &st) < 0 || |
| (literally |
| ? hash_literally(&oid, fd, type, flags) |
| : index_fd(&oid, fd, &st, type_from_string(type), path, flags))) |
| die((flags & HASH_WRITE_OBJECT) |
| ? "Unable to add %s to database" |
| : "Unable to hash %s", path); |
| printf("%s\n", oid_to_hex(&oid)); |
| maybe_flush_or_die(stdout, "hash to stdout"); |
| } |
| |
| static void hash_object(const char *path, const char *type, const char *vpath, |
| unsigned flags, int literally) |
| { |
| int fd; |
| fd = open(path, O_RDONLY); |
| if (fd < 0) |
| die_errno("Cannot open '%s'", path); |
| hash_fd(fd, type, vpath, flags, literally); |
| } |
| |
| static void hash_stdin_paths(const char *type, int no_filters, unsigned flags, |
| int literally) |
| { |
| struct strbuf buf = STRBUF_INIT; |
| struct strbuf unquoted = STRBUF_INIT; |
| |
| while (strbuf_getline(&buf, stdin) != EOF) { |
| if (buf.buf[0] == '"') { |
| strbuf_reset(&unquoted); |
| if (unquote_c_style(&unquoted, buf.buf, NULL)) |
| die("line is badly quoted"); |
| strbuf_swap(&buf, &unquoted); |
| } |
| hash_object(buf.buf, type, no_filters ? NULL : buf.buf, flags, |
| literally); |
| } |
| strbuf_release(&buf); |
| strbuf_release(&unquoted); |
| } |
| |
| int cmd_hash_object(int argc, const char **argv, const char *prefix) |
| { |
| static const char * const hash_object_usage[] = { |
| N_("git hash-object [-t <type>] [-w] [--path=<file> | --no-filters] [--stdin] [--] <file>..."), |
| N_("git hash-object --stdin-paths"), |
| NULL |
| }; |
| const char *type = blob_type; |
| int hashstdin = 0; |
| int stdin_paths = 0; |
| int no_filters = 0; |
| int literally = 0; |
| int nongit = 0; |
| unsigned flags = HASH_FORMAT_CHECK; |
| const char *vpath = NULL; |
| const struct option hash_object_options[] = { |
| OPT_STRING('t', NULL, &type, N_("type"), N_("object type")), |
| OPT_BIT('w', NULL, &flags, N_("write the object into the object database"), |
| HASH_WRITE_OBJECT), |
| OPT_COUNTUP( 0 , "stdin", &hashstdin, N_("read the object from stdin")), |
| OPT_BOOL( 0 , "stdin-paths", &stdin_paths, N_("read file names from stdin")), |
| OPT_BOOL( 0 , "no-filters", &no_filters, N_("store file as is without filters")), |
| OPT_BOOL( 0, "literally", &literally, N_("just hash any random garbage to create corrupt objects for debugging Git")), |
| OPT_STRING( 0 , "path", &vpath, N_("file"), N_("process file as it were from this path")), |
| OPT_END() |
| }; |
| int i; |
| const char *errstr = NULL; |
| |
| argc = parse_options(argc, argv, NULL, hash_object_options, |
| hash_object_usage, 0); |
| |
| if (flags & HASH_WRITE_OBJECT) |
| prefix = setup_git_directory(); |
| else |
| prefix = setup_git_directory_gently(&nongit); |
| |
| if (vpath && prefix) |
| vpath = xstrdup(prefix_filename(prefix, vpath)); |
| |
| git_config(git_default_config, NULL); |
| |
| if (stdin_paths) { |
| if (hashstdin) |
| errstr = "Can't use --stdin-paths with --stdin"; |
| else if (argc) |
| errstr = "Can't specify files with --stdin-paths"; |
| else if (vpath) |
| errstr = "Can't use --stdin-paths with --path"; |
| } |
| else { |
| if (hashstdin > 1) |
| errstr = "Multiple --stdin arguments are not supported"; |
| if (vpath && no_filters) |
| errstr = "Can't use --path with --no-filters"; |
| } |
| |
| if (errstr) { |
| error("%s", errstr); |
| usage_with_options(hash_object_usage, hash_object_options); |
| } |
| |
| if (hashstdin) |
| hash_fd(0, type, vpath, flags, literally); |
| |
| for (i = 0 ; i < argc; i++) { |
| const char *arg = argv[i]; |
| char *to_free = NULL; |
| |
| if (prefix) |
| arg = to_free = prefix_filename(prefix, arg); |
| hash_object(arg, type, no_filters ? NULL : vpath ? vpath : arg, |
| flags, literally); |
| free(to_free); |
| } |
| |
| if (stdin_paths) |
| hash_stdin_paths(type, no_filters, flags, literally); |
| |
| return 0; |
| } |