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[git.git] / hash-object.c
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 "cache.h"
8 #include "blob.h"
9
10 static void hash_object(const char *path, const char *type, int write_object)
11 {
12         int fd;
13         struct stat st;
14         unsigned char sha1[20];
15         fd = open(path, O_RDONLY);
16         if (fd < 0 ||
17             fstat(fd, &st) < 0 ||
18             index_fd(sha1, fd, &st, write_object, type))
19                 die(write_object
20                     ? "Unable to add %s to database"
21                     : "Unable to hash %s", path);
22         printf("%s\n", sha1_to_hex(sha1));
23 }
24
25 static void hash_stdin(const char *type, int write_object)
26 {
27         unsigned char sha1[20];
28         if (index_pipe(sha1, 0, type, write_object))
29                 die("Unable to add stdin to database");
30         printf("%s\n", sha1_to_hex(sha1));
31 }
32
33 static const char hash_object_usage[] =
34 "git-hash-object [-t <type>] [-w] [--stdin] <file>...";
35
36 int main(int argc, char **argv)
37 {
38         int i;
39         const char *type = blob_type;
40         int write_object = 0;
41         const char *prefix = NULL;
42         int prefix_length = -1;
43         int no_more_flags = 0;
44
45         for (i = 1 ; i < argc; i++) {
46                 if (!no_more_flags && argv[i][0] == '-') {
47                         if (!strcmp(argv[i], "-t")) {
48                                 if (argc <= ++i)
49                                         die(hash_object_usage);
50                                 type = argv[i];
51                         }
52                         else if (!strcmp(argv[i], "-w")) {
53                                 if (prefix_length < 0) {
54                                         prefix = setup_git_directory();
55                                         prefix_length =
56                                                 prefix ? strlen(prefix) : 0;
57                                 }
58                                 write_object = 1;
59                         }
60                         else if (!strcmp(argv[i], "--")) {
61                                 no_more_flags = 1;
62                         }
63                         else if (!strcmp(argv[i], "--help"))
64                                 usage(hash_object_usage);
65                         else if (!strcmp(argv[i], "--stdin")) {
66                                 hash_stdin(type, write_object);
67                         }
68                         else
69                                 die(hash_object_usage);
70                 } 
71                 else {
72                         const char *arg = argv[i];
73                         if (0 <= prefix_length)
74                                 arg = prefix_filename(prefix, prefix_length,
75                                                       arg);
76                         hash_object(arg, type, write_object);
77                         no_more_flags = 1;
78                 }
79         }
80         return 0;
81 }