2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
9 * Default to not allowing changes to the list of files. The
10 * tool doesn't actually care, but this makes it harder to add
11 * files to the revision control by mistake by doing something
12 * like "update-cache *" and suddenly having all the object
13 * files be revision controlled.
15 static int allow_add = 0, allow_remove = 0;
17 static int index_fd(const char *path, int namelen, struct cache_entry *ce, int fd, struct stat *st)
20 int max_out_bytes = namelen + st->st_size + 200;
21 void *out = malloc(max_out_bytes);
22 void *metadata = malloc(namelen + 200);
23 void *in = mmap(NULL, st->st_size, PROT_READ, MAP_PRIVATE, fd, 0);
27 if (!out || (int)(long)in == -1)
30 memset(&stream, 0, sizeof(stream));
31 deflateInit(&stream, Z_BEST_COMPRESSION);
34 * ASCII size + nul byte
36 stream.next_in = metadata;
37 stream.avail_in = 1+sprintf(metadata, "blob %lu", (unsigned long) st->st_size);
38 stream.next_out = out;
39 stream.avail_out = max_out_bytes;
40 while (deflate(&stream, 0) == Z_OK)
47 stream.avail_in = st->st_size;
48 while (deflate(&stream, Z_FINISH) == Z_OK)
54 SHA1_Update(&c, out, stream.total_out);
55 SHA1_Final(ce->sha1, &c);
57 return write_sha1_buffer(ce->sha1, out, stream.total_out);
60 static int add_file_to_cache(char *path)
63 struct cache_entry *ce;
67 fd = open(path, O_RDONLY);
69 if (errno == ENOENT) {
71 return remove_file_from_cache(path);
75 if (fstat(fd, &st) < 0) {
79 namelen = strlen(path);
80 size = cache_entry_size(namelen);
83 memcpy(ce->name, path, namelen);
84 ce->ctime.sec = st.st_ctime;
85 ce->ctime.nsec = st.st_ctim.tv_nsec;
86 ce->mtime.sec = st.st_mtime;
87 ce->mtime.nsec = st.st_mtim.tv_nsec;
88 ce->st_dev = st.st_dev;
89 ce->st_ino = st.st_ino;
90 ce->st_mode = st.st_mode;
91 ce->st_uid = st.st_uid;
92 ce->st_gid = st.st_gid;
93 ce->st_size = st.st_size;
94 ce->namelen = namelen;
96 if (index_fd(path, namelen, ce, fd, &st) < 0)
99 return add_cache_entry(ce, allow_add);
102 static void refresh_entry(struct cache_entry *ce)
105 * This is really not the right way to do it, but
106 * add_file_to_cache() does do the right thing.
108 * We should really just update the cache
109 * entry in-place, I think. With this approach we
110 * end up allocating a new one, searching for where
111 * to insert it etc etc crud.
113 add_file_to_cache(ce->name);
116 static void refresh_cache(void)
120 for (i = 0; i < active_nr; i++)
121 refresh_entry(active_cache[i]);
125 * We fundamentally don't like some paths: we don't want
126 * dot or dot-dot anywhere, and in fact, we don't even want
127 * any other dot-files (.dircache or anything else). They
128 * are hidden, for chist sake.
130 * Also, we don't want double slashes or slashes at the
131 * end that can make pathnames ambiguous.
133 static int verify_path(char *path)
144 if (c != '/' && c != '.' && c != '\0')
152 int main(int argc, char **argv)
154 int i, newfd, entries;
155 int allow_options = 1;
157 entries = read_cache();
159 perror("cache corrupted");
163 newfd = open(".dircache/index.lock", O_RDWR | O_CREAT | O_EXCL, 0600);
165 perror("unable to create new cachefile");
168 for (i = 1 ; i < argc; i++) {
169 char *path = argv[i];
171 if (allow_options && *path == '-') {
172 if (!strcmp(path, "--")) {
176 if (!strcmp(path, "--add")) {
180 if (!strcmp(path, "--remove")) {
184 if (!strcmp(path, "--refresh")) {
188 usage("unknown option %s", path);
190 if (!verify_path(path)) {
191 fprintf(stderr, "Ignoring path %s\n", argv[i]);
194 if (add_file_to_cache(path)) {
195 fprintf(stderr, "Unable to add %s to database\n", path);
199 if (!write_cache(newfd, active_cache, active_nr) && !rename(".dircache/index.lock", ".dircache/index"))
202 unlink(".dircache/index.lock");