/* * GIT - The information manager from hell * * Copyright (C) Linus Torvalds, 2005 * Copyright (C) Junio C Hamano, 2005 */ #include "builtin.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(unsigned char *sha1, 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_sha1_file_literally(buf.buf, buf.len, type, sha1, 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; unsigned char sha1[20]; if (fstat(fd, &st) < 0 || (literally ? hash_literally(sha1, fd, type, flags) : index_fd(sha1, 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", sha1_to_hex(sha1)); 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, nbuf = STRBUF_INIT; while (strbuf_getline_lf(&buf, stdin) != EOF) { if (buf.buf[0] == '"') { strbuf_reset(&nbuf); if (unquote_c_style(&nbuf, buf.buf, NULL)) die("line is badly quoted"); strbuf_swap(&buf, &nbuf); } hash_object(buf.buf, type, no_filters ? NULL : buf.buf, flags, literally); } strbuf_release(&buf); strbuf_release(&nbuf); } int cmd_hash_object(int argc, const char **argv, const char *prefix) { static const char * const hash_object_usage[] = { N_("git hash-object [-t ] [-w] [--path= | --no-filters] [--stdin] [--] ..."), 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; 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; int prefix_length = -1; 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(); prefix_length = prefix ? strlen(prefix) : 0; if (vpath && prefix) vpath = prefix_filename(prefix, prefix_length, 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]; if (0 <= prefix_length) arg = prefix_filename(prefix, prefix_length, arg); hash_object(arg, type, no_filters ? NULL : vpath ? vpath : arg, flags, literally); } if (stdin_paths) hash_stdin_paths(type, no_filters, flags, literally); return 0; }