submodule: Use cat instead of echo to avoid DOS line-endings
[git/dscho.git] / builtin / hash-object.c
blob33911fd5e9325210dae63b3252fa3b56d42b545c
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 "blob.h"
9 #include "quote.h"
10 #include "parse-options.h"
11 #include "exec_cmd.h"
13 static void hash_fd(int fd, const char *type, int write_object, const char *path)
15 struct stat st;
16 unsigned char sha1[20];
17 unsigned flags = (HASH_FORMAT_CHECK |
18 (write_object ? HASH_WRITE_OBJECT : 0));
20 if (fstat(fd, &st) < 0 ||
21 index_fd(sha1, fd, &st, type_from_string(type), path, flags))
22 die(write_object
23 ? "Unable to add %s to database"
24 : "Unable to hash %s", path);
25 printf("%s\n", sha1_to_hex(sha1));
26 maybe_flush_or_die(stdout, "hash to stdout");
29 static void hash_object(const char *path, const char *type, int write_object,
30 const char *vpath)
32 int fd;
33 fd = open(path, O_RDONLY);
34 if (fd < 0)
35 die_errno("Cannot open '%s'", path);
36 hash_fd(fd, type, write_object, vpath);
39 static int no_filters;
41 static void hash_stdin_paths(const char *type, int write_objects)
43 struct strbuf buf = STRBUF_INIT, nbuf = STRBUF_INIT;
45 while (strbuf_getline(&buf, stdin, '\n') != EOF) {
46 if (buf.buf[0] == '"') {
47 strbuf_reset(&nbuf);
48 if (unquote_c_style(&nbuf, buf.buf, NULL))
49 die("line is badly quoted");
50 strbuf_swap(&buf, &nbuf);
52 hash_object(buf.buf, type, write_objects,
53 no_filters ? NULL : buf.buf);
55 strbuf_release(&buf);
56 strbuf_release(&nbuf);
59 static const char * const hash_object_usage[] = {
60 "git hash-object [-t <type>] [-w] [--path=<file>|--no-filters] [--stdin] [--] <file>...",
61 "git hash-object --stdin-paths < <list-of-paths>",
62 NULL
65 static const char *type;
66 static int write_object;
67 static int hashstdin;
68 static int stdin_paths;
69 static const char *vpath;
71 static const struct option hash_object_options[] = {
72 OPT_STRING('t', NULL, &type, "type", "object type"),
73 OPT_BOOLEAN('w', NULL, &write_object, "write the object into the object database"),
74 OPT_BOOLEAN( 0 , "stdin", &hashstdin, "read the object from stdin"),
75 OPT_BOOLEAN( 0 , "stdin-paths", &stdin_paths, "read file names from stdin"),
76 OPT_BOOLEAN( 0 , "no-filters", &no_filters, "store file as is without filters"),
77 OPT_STRING( 0 , "path", &vpath, "file", "process file as it were from this path"),
78 OPT_END()
81 int cmd_hash_object(int argc, const char **argv, const char *prefix)
83 int i;
84 int prefix_length = -1;
85 const char *errstr = NULL;
87 type = blob_type;
89 argc = parse_options(argc, argv, NULL, hash_object_options,
90 hash_object_usage, 0);
92 if (write_object) {
93 prefix = setup_git_directory();
94 prefix_length = prefix ? strlen(prefix) : 0;
95 if (vpath && prefix)
96 vpath = prefix_filename(prefix, prefix_length, vpath);
99 git_config(git_default_config, NULL);
101 if (stdin_paths) {
102 if (hashstdin)
103 errstr = "Can't use --stdin-paths with --stdin";
104 else if (argc)
105 errstr = "Can't specify files with --stdin-paths";
106 else if (vpath)
107 errstr = "Can't use --stdin-paths with --path";
109 else {
110 if (hashstdin > 1)
111 errstr = "Multiple --stdin arguments are not supported";
112 if (vpath && no_filters)
113 errstr = "Can't use --path with --no-filters";
116 if (errstr) {
117 error("%s", errstr);
118 usage_with_options(hash_object_usage, hash_object_options);
121 if (hashstdin)
122 hash_fd(0, type, write_object, vpath);
124 for (i = 0 ; i < argc; i++) {
125 const char *arg = argv[i];
127 if (0 <= prefix_length)
128 arg = prefix_filename(prefix, prefix_length, arg);
129 hash_object(arg, type, write_object,
130 no_filters ? NULL : vpath ? vpath : arg);
133 if (stdin_paths)
134 hash_stdin_paths(type, write_object);
136 return 0;