Merge branch 'np/maint-sideband-favor-status'
[git/gitbuild.git] / hash-object.c
blob9455dd0709aeb81436ef2e3e36422578d66ce8e7
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 #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         if (fstat(fd, &st) < 0 ||
18             index_fd(sha1, fd, &st, write_object, type_from_string(type), path))
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         maybe_flush_or_die(stdout, "hash to stdout");
26 static void hash_object(const char *path, const char *type, int write_object,
27                         const char *vpath)
29         int fd;
30         fd = open(path, O_RDONLY);
31         if (fd < 0)
32                 die_errno("Cannot open '%s'", path);
33         hash_fd(fd, type, write_object, vpath);
36 static void hash_stdin_paths(const char *type, int write_objects)
38         struct strbuf buf = STRBUF_INIT, nbuf = STRBUF_INIT;
40         while (strbuf_getline(&buf, stdin, '\n') != EOF) {
41                 if (buf.buf[0] == '"') {
42                         strbuf_reset(&nbuf);
43                         if (unquote_c_style(&nbuf, buf.buf, NULL))
44                                 die("line is badly quoted");
45                         strbuf_swap(&buf, &nbuf);
46                 }
47                 hash_object(buf.buf, type, write_objects, buf.buf);
48         }
49         strbuf_release(&buf);
50         strbuf_release(&nbuf);
53 static const char * const hash_object_usage[] = {
54         "git hash-object [-t <type>] [-w] [--path=<file>|--no-filters] [--stdin] [--] <file>...",
55         "git hash-object  --stdin-paths < <list-of-paths>",
56         NULL
59 static const char *type;
60 static int write_object;
61 static int hashstdin;
62 static int stdin_paths;
63 static int no_filters;
64 static const char *vpath;
66 static const struct option hash_object_options[] = {
67         OPT_STRING('t', NULL, &type, "type", "object type"),
68         OPT_BOOLEAN('w', NULL, &write_object, "write the object into the object database"),
69         OPT_BOOLEAN( 0 , "stdin", &hashstdin, "read the object from stdin"),
70         OPT_BOOLEAN( 0 , "stdin-paths", &stdin_paths, "read file names from stdin"),
71         OPT_BOOLEAN( 0 , "no-filters", &no_filters, "store file as is without filters"),
72         OPT_STRING( 0 , "path", &vpath, "file", "process file as it were from this path"),
73         OPT_END()
76 int main(int argc, const char **argv)
78         int i;
79         const char *prefix = NULL;
80         int prefix_length = -1;
81         const char *errstr = NULL;
83         type = blob_type;
85         git_extract_argv0_path(argv[0]);
87         argc = parse_options(argc, argv, NULL, hash_object_options,
88                              hash_object_usage, 0);
90         if (write_object) {
91                 prefix = setup_git_directory();
92                 prefix_length = prefix ? strlen(prefix) : 0;
93                 if (vpath && prefix)
94                         vpath = prefix_filename(prefix, prefix_length, vpath);
95         }
97         git_config(git_default_config, NULL);
99         if (stdin_paths) {
100                 if (hashstdin)
101                         errstr = "Can't use --stdin-paths with --stdin";
102                 else if (argc)
103                         errstr = "Can't specify files with --stdin-paths";
104                 else if (vpath)
105                         errstr = "Can't use --stdin-paths with --path";
106                 else if (no_filters)
107                         errstr = "Can't use --stdin-paths with --no-filters";
108         }
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";
114         }
116         if (errstr) {
117                 error("%s", errstr);
118                 usage_with_options(hash_object_usage, hash_object_options);
119         }
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);
131         }
133         if (stdin_paths)
134                 hash_stdin_paths(type, write_object);
136         return 0;