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1 | /* | |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | * Copyright (C) Junio C Hamano, 2005 | |
6 | */ | |
7 | #include "builtin.h" | |
8 | #include "config.h" | |
9 | #include "object-store.h" | |
10 | #include "blob.h" | |
11 | #include "quote.h" | |
12 | #include "parse-options.h" | |
13 | #include "exec-cmd.h" | |
14 | ||
15 | /* | |
16 | * This is to create corrupt objects for debugging and as such it | |
17 | * needs to bypass the data conversion performed by, and the type | |
18 | * limitation imposed by, index_fd() and its callees. | |
19 | */ | |
20 | static int hash_literally(struct object_id *oid, int fd, const char *type, unsigned flags) | |
21 | { | |
22 | struct strbuf buf = STRBUF_INIT; | |
23 | int ret; | |
24 | ||
25 | if (strbuf_read(&buf, fd, 4096) < 0) | |
26 | ret = -1; | |
27 | else | |
28 | ret = hash_object_file_literally(buf.buf, buf.len, type, oid, | |
29 | flags); | |
30 | strbuf_release(&buf); | |
31 | return ret; | |
32 | } | |
33 | ||
34 | static void hash_fd(int fd, const char *type, const char *path, unsigned flags, | |
35 | int literally) | |
36 | { | |
37 | struct stat st; | |
38 | struct object_id oid; | |
39 | ||
40 | if (fstat(fd, &st) < 0 || | |
41 | (literally | |
42 | ? hash_literally(&oid, fd, type, flags) | |
43 | : index_fd(the_repository->index, &oid, fd, &st, | |
44 | type_from_string(type), path, flags))) | |
45 | die((flags & HASH_WRITE_OBJECT) | |
46 | ? "Unable to add %s to database" | |
47 | : "Unable to hash %s", path); | |
48 | printf("%s\n", oid_to_hex(&oid)); | |
49 | maybe_flush_or_die(stdout, "hash to stdout"); | |
50 | } | |
51 | ||
52 | static void hash_object(const char *path, const char *type, const char *vpath, | |
53 | unsigned flags, int literally) | |
54 | { | |
55 | int fd; | |
56 | fd = open(path, O_RDONLY); | |
57 | if (fd < 0) | |
58 | die_errno("Cannot open '%s'", path); | |
59 | hash_fd(fd, type, vpath, flags, literally); | |
60 | } | |
61 | ||
62 | static void hash_stdin_paths(const char *type, int no_filters, unsigned flags, | |
63 | int literally) | |
64 | { | |
65 | struct strbuf buf = STRBUF_INIT; | |
66 | struct strbuf unquoted = STRBUF_INIT; | |
67 | ||
68 | while (strbuf_getline(&buf, stdin) != EOF) { | |
69 | if (buf.buf[0] == '"') { | |
70 | strbuf_reset(&unquoted); | |
71 | if (unquote_c_style(&unquoted, buf.buf, NULL)) | |
72 | die("line is badly quoted"); | |
73 | strbuf_swap(&buf, &unquoted); | |
74 | } | |
75 | hash_object(buf.buf, type, no_filters ? NULL : buf.buf, flags, | |
76 | literally); | |
77 | } | |
78 | strbuf_release(&buf); | |
79 | strbuf_release(&unquoted); | |
80 | } | |
81 | ||
82 | int cmd_hash_object(int argc, const char **argv, const char *prefix) | |
83 | { | |
84 | static const char * const hash_object_usage[] = { | |
85 | N_("git hash-object [-t <type>] [-w] [--path=<file> | --no-filters] [--stdin] [--] <file>..."), | |
86 | N_("git hash-object --stdin-paths"), | |
87 | NULL | |
88 | }; | |
89 | const char *type = blob_type; | |
90 | int hashstdin = 0; | |
91 | int stdin_paths = 0; | |
92 | int no_filters = 0; | |
93 | int literally = 0; | |
94 | int nongit = 0; | |
95 | unsigned flags = HASH_FORMAT_CHECK; | |
96 | const char *vpath = NULL; | |
97 | const struct option hash_object_options[] = { | |
98 | OPT_STRING('t', NULL, &type, N_("type"), N_("object type")), | |
99 | OPT_BIT('w', NULL, &flags, N_("write the object into the object database"), | |
100 | HASH_WRITE_OBJECT), | |
101 | OPT_COUNTUP( 0 , "stdin", &hashstdin, N_("read the object from stdin")), | |
102 | OPT_BOOL( 0 , "stdin-paths", &stdin_paths, N_("read file names from stdin")), | |
103 | OPT_BOOL( 0 , "no-filters", &no_filters, N_("store file as is without filters")), | |
104 | OPT_BOOL( 0, "literally", &literally, N_("just hash any random garbage to create corrupt objects for debugging Git")), | |
105 | OPT_STRING( 0 , "path", &vpath, N_("file"), N_("process file as it were from this path")), | |
106 | OPT_END() | |
107 | }; | |
108 | int i; | |
109 | const char *errstr = NULL; | |
110 | ||
111 | argc = parse_options(argc, argv, prefix, hash_object_options, | |
112 | hash_object_usage, 0); | |
113 | ||
114 | if (flags & HASH_WRITE_OBJECT) | |
115 | prefix = setup_git_directory(); | |
116 | else | |
117 | prefix = setup_git_directory_gently(&nongit); | |
118 | ||
119 | if (vpath && prefix) | |
120 | vpath = xstrdup(prefix_filename(prefix, vpath)); | |
121 | ||
122 | git_config(git_default_config, NULL); | |
123 | ||
124 | if (stdin_paths) { | |
125 | if (hashstdin) | |
126 | errstr = "Can't use --stdin-paths with --stdin"; | |
127 | else if (argc) | |
128 | errstr = "Can't specify files with --stdin-paths"; | |
129 | else if (vpath) | |
130 | errstr = "Can't use --stdin-paths with --path"; | |
131 | } | |
132 | else { | |
133 | if (hashstdin > 1) | |
134 | errstr = "Multiple --stdin arguments are not supported"; | |
135 | if (vpath && no_filters) | |
136 | errstr = "Can't use --path with --no-filters"; | |
137 | } | |
138 | ||
139 | if (errstr) { | |
140 | error("%s", errstr); | |
141 | usage_with_options(hash_object_usage, hash_object_options); | |
142 | } | |
143 | ||
144 | if (hashstdin) | |
145 | hash_fd(0, type, vpath, flags, literally); | |
146 | ||
147 | for (i = 0 ; i < argc; i++) { | |
148 | const char *arg = argv[i]; | |
149 | char *to_free = NULL; | |
150 | ||
151 | if (prefix) | |
152 | arg = to_free = prefix_filename(prefix, arg); | |
153 | hash_object(arg, type, no_filters ? NULL : vpath ? vpath : arg, | |
154 | flags, literally); | |
155 | free(to_free); | |
156 | } | |
157 | ||
158 | if (stdin_paths) | |
159 | hash_stdin_paths(type, no_filters, flags, literally); | |
160 | ||
161 | return 0; | |
162 | } |