]> git.ipfire.org Git - thirdparty/git.git/blame - builtin/hash-object.c
sha1_file: convert write_loose_object to object_id
[thirdparty/git.git] / builtin / hash-object.c
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1/*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
8e440259 5 * Copyright (C) Junio C Hamano, 2005
7672db20 6 */
c2e86add 7#include "builtin.h"
b2141fc1 8#include "config.h"
8e440259 9#include "blob.h"
d8ee4832 10#include "quote.h"
548601ad 11#include "parse-options.h"
2fb3f6db 12#include "exec_cmd.h"
7672db20 13
5ba9a93b
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14/*
15 * This is to create corrupt objects for debugging and as such it
16 * needs to bypass the data conversion performed by, and the type
17 * limitation imposed by, index_fd() and its callees.
18 */
eab8bf29 19static int hash_literally(struct object_id *oid, int fd, const char *type, unsigned flags)
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JH
20{
21 struct strbuf buf = STRBUF_INIT;
22 int ret;
23
24 if (strbuf_read(&buf, fd, 4096) < 0)
25 ret = -1;
5ba9a93b 26 else
da77611d 27 ret = hash_sha1_file_literally(buf.buf, buf.len, type, oid, flags);
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28 strbuf_release(&buf);
29 return ret;
30}
31
32static void hash_fd(int fd, const char *type, const char *path, unsigned flags,
33 int literally)
7672db20 34{
7672db20 35 struct stat st;
eab8bf29 36 struct object_id oid;
c4ce46fc 37
43df4f86 38 if (fstat(fd, &st) < 0 ||
5ba9a93b 39 (literally
eab8bf29 40 ? hash_literally(&oid, fd, type, flags)
e3506559 41 : index_fd(&oid, fd, &st, type_from_string(type), path, flags)))
17b787f6 42 die((flags & HASH_WRITE_OBJECT)
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43 ? "Unable to add %s to database"
44 : "Unable to hash %s", path);
eab8bf29 45 printf("%s\n", oid_to_hex(&oid));
d8ee4832 46 maybe_flush_or_die(stdout, "hash to stdout");
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47}
48
17b787f6 49static void hash_object(const char *path, const char *type, const char *vpath,
5ba9a93b 50 unsigned flags, int literally)
024510c8 51{
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52 int fd;
53 fd = open(path, O_RDONLY);
54 if (fd < 0)
0721c314 55 die_errno("Cannot open '%s'", path);
5ba9a93b 56 hash_fd(fd, type, vpath, flags, literally);
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57}
58
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59static void hash_stdin_paths(const char *type, int no_filters, unsigned flags,
60 int literally)
d8ee4832 61{
0d4cc1b4
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62 struct strbuf buf = STRBUF_INIT;
63 struct strbuf unquoted = STRBUF_INIT;
d8ee4832 64
c0353c78 65 while (strbuf_getline(&buf, stdin) != EOF) {
d8ee4832 66 if (buf.buf[0] == '"') {
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67 strbuf_reset(&unquoted);
68 if (unquote_c_style(&unquoted, buf.buf, NULL))
d8ee4832 69 die("line is badly quoted");
0d4cc1b4 70 strbuf_swap(&buf, &unquoted);
d8ee4832 71 }
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72 hash_object(buf.buf, type, no_filters ? NULL : buf.buf, flags,
73 literally);
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74 }
75 strbuf_release(&buf);
0d4cc1b4 76 strbuf_release(&unquoted);
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77}
78
b28a1ce0 79int cmd_hash_object(int argc, const char **argv, const char *prefix)
7672db20 80{
b64a9846 81 static const char * const hash_object_usage[] = {
9c9b4f2f 82 N_("git hash-object [-t <type>] [-w] [--path=<file> | --no-filters] [--stdin] [--] <file>..."),
33e8fc87 83 N_("git hash-object --stdin-paths"),
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84 NULL
85 };
86 const char *type = blob_type;
87 int hashstdin = 0;
88 int stdin_paths = 0;
b64a9846 89 int no_filters = 0;
5ba9a93b 90 int literally = 0;
0e94ee94 91 int nongit = 0;
17b787f6 92 unsigned flags = HASH_FORMAT_CHECK;
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93 const char *vpath = NULL;
94 const struct option hash_object_options[] = {
95 OPT_STRING('t', NULL, &type, N_("type"), N_("object type")),
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96 OPT_BIT('w', NULL, &flags, N_("write the object into the object database"),
97 HASH_WRITE_OBJECT),
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98 OPT_COUNTUP( 0 , "stdin", &hashstdin, N_("read the object from stdin")),
99 OPT_BOOL( 0 , "stdin-paths", &stdin_paths, N_("read file names from stdin")),
100 OPT_BOOL( 0 , "no-filters", &no_filters, N_("store file as is without filters")),
5ba9a93b 101 OPT_BOOL( 0, "literally", &literally, N_("just hash any random garbage to create corrupt objects for debugging Git")),
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102 OPT_STRING( 0 , "path", &vpath, N_("file"), N_("process file as it were from this path")),
103 OPT_END()
104 };
7672db20 105 int i;
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106 const char *errstr = NULL;
107
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108 argc = parse_options(argc, argv, NULL, hash_object_options,
109 hash_object_usage, 0);
548601ad 110
0e94ee94 111 if (flags & HASH_WRITE_OBJECT)
548601ad 112 prefix = setup_git_directory();
0e94ee94
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113 else
114 prefix = setup_git_directory_gently(&nongit);
115
0e94ee94 116 if (vpath && prefix)
116fb64e 117 vpath = xstrdup(prefix_filename(prefix, vpath));
d8ee4832 118
272459a3
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119 git_config(git_default_config, NULL);
120
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121 if (stdin_paths) {
122 if (hashstdin)
123 errstr = "Can't use --stdin-paths with --stdin";
124 else if (argc)
125 errstr = "Can't specify files with --stdin-paths";
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126 else if (vpath)
127 errstr = "Can't use --stdin-paths with --path";
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128 }
129 else {
130 if (hashstdin > 1)
131 errstr = "Multiple --stdin arguments are not supported";
132 if (vpath && no_filters)
133 errstr = "Can't use --path with --no-filters";
548601ad 134 }
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135
136 if (errstr) {
42fc1139 137 error("%s", errstr);
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138 usage_with_options(hash_object_usage, hash_object_options);
139 }
d8ee4832 140
8a2f5e5b 141 if (hashstdin)
5ba9a93b 142 hash_fd(0, type, vpath, flags, literally);
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143
144 for (i = 0 ; i < argc; i++) {
145 const char *arg = argv[i];
a1be47e4 146 char *to_free = NULL;
548601ad 147
116fb64e 148 if (prefix)
e4da43b1 149 arg = to_free = prefix_filename(prefix, arg);
17b787f6 150 hash_object(arg, type, no_filters ? NULL : vpath ? vpath : arg,
5ba9a93b 151 flags, literally);
a1be47e4 152 free(to_free);
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153 }
154
155 if (stdin_paths)
5ba9a93b 156 hash_stdin_paths(type, no_filters, flags, literally);
548601ad 157
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158 return 0;
159}