Merge branch 'jt/http-redact-cookies' into maint
[git.git] / builtin / hash-object.c
blobc532ff9320c751d1db5475add51f2c3c6a8c7146
1 /*
2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Junio C Hamano, 2005
6 */
7 #include "builtin.h"
8 #include "config.h"
9 #include "blob.h"
10 #include "quote.h"
11 #include "parse-options.h"
12 #include "exec_cmd.h"
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.
19 static int hash_literally(struct object_id *oid, int fd, const char *type, unsigned flags)
21 struct strbuf buf = STRBUF_INIT;
22 int ret;
24 if (strbuf_read(&buf, fd, 4096) < 0)
25 ret = -1;
26 else
27 ret = hash_sha1_file_literally(buf.buf, buf.len, type, oid, flags);
28 strbuf_release(&buf);
29 return ret;
32 static void hash_fd(int fd, const char *type, const char *path, unsigned flags,
33 int literally)
35 struct stat st;
36 struct object_id oid;
38 if (fstat(fd, &st) < 0 ||
39 (literally
40 ? hash_literally(&oid, fd, type, flags)
41 : index_fd(&oid, fd, &st, type_from_string(type), path, flags)))
42 die((flags & HASH_WRITE_OBJECT)
43 ? "Unable to add %s to database"
44 : "Unable to hash %s", path);
45 printf("%s\n", oid_to_hex(&oid));
46 maybe_flush_or_die(stdout, "hash to stdout");
49 static void hash_object(const char *path, const char *type, const char *vpath,
50 unsigned flags, int literally)
52 int fd;
53 fd = open(path, O_RDONLY);
54 if (fd < 0)
55 die_errno("Cannot open '%s'", path);
56 hash_fd(fd, type, vpath, flags, literally);
59 static void hash_stdin_paths(const char *type, int no_filters, unsigned flags,
60 int literally)
62 struct strbuf buf = STRBUF_INIT;
63 struct strbuf unquoted = STRBUF_INIT;
65 while (strbuf_getline(&buf, stdin) != EOF) {
66 if (buf.buf[0] == '"') {
67 strbuf_reset(&unquoted);
68 if (unquote_c_style(&unquoted, buf.buf, NULL))
69 die("line is badly quoted");
70 strbuf_swap(&buf, &unquoted);
72 hash_object(buf.buf, type, no_filters ? NULL : buf.buf, flags,
73 literally);
75 strbuf_release(&buf);
76 strbuf_release(&unquoted);
79 int cmd_hash_object(int argc, const char **argv, const char *prefix)
81 static const char * const hash_object_usage[] = {
82 N_("git hash-object [-t <type>] [-w] [--path=<file> | --no-filters] [--stdin] [--] <file>..."),
83 N_("git hash-object --stdin-paths"),
84 NULL
86 const char *type = blob_type;
87 int hashstdin = 0;
88 int stdin_paths = 0;
89 int no_filters = 0;
90 int literally = 0;
91 int nongit = 0;
92 unsigned flags = HASH_FORMAT_CHECK;
93 const char *vpath = NULL;
94 const struct option hash_object_options[] = {
95 OPT_STRING('t', NULL, &type, N_("type"), N_("object type")),
96 OPT_BIT('w', NULL, &flags, N_("write the object into the object database"),
97 HASH_WRITE_OBJECT),
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")),
101 OPT_BOOL( 0, "literally", &literally, N_("just hash any random garbage to create corrupt objects for debugging Git")),
102 OPT_STRING( 0 , "path", &vpath, N_("file"), N_("process file as it were from this path")),
103 OPT_END()
105 int i;
106 const char *errstr = NULL;
108 argc = parse_options(argc, argv, NULL, hash_object_options,
109 hash_object_usage, 0);
111 if (flags & HASH_WRITE_OBJECT)
112 prefix = setup_git_directory();
113 else
114 prefix = setup_git_directory_gently(&nongit);
116 if (vpath && prefix)
117 vpath = xstrdup(prefix_filename(prefix, vpath));
119 git_config(git_default_config, NULL);
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";
126 else if (vpath)
127 errstr = "Can't use --stdin-paths with --path";
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";
136 if (errstr) {
137 error("%s", errstr);
138 usage_with_options(hash_object_usage, hash_object_options);
141 if (hashstdin)
142 hash_fd(0, type, vpath, flags, literally);
144 for (i = 0 ; i < argc; i++) {
145 const char *arg = argv[i];
146 char *to_free = NULL;
148 if (prefix)
149 arg = to_free = prefix_filename(prefix, arg);
150 hash_object(arg, type, no_filters ? NULL : vpath ? vpath : arg,
151 flags, literally);
152 free(to_free);
155 if (stdin_paths)
156 hash_stdin_paths(type, no_filters, flags, literally);
158 return 0;