1 /*
2 * "git add" builtin command
3 *
4 * Copyright (C) 2006 Linus Torvalds
5 */
6 #include <fnmatch.h>
8 #include "cache.h"
9 #include "builtin.h"
10 #include "dir.h"
12 static const char builtin_add_usage[] =
13 "git-add [-n] [-v] <filepattern>...";
15 static int common_prefix(const char **pathspec)
16 {
17 const char *path, *slash, *next;
18 int prefix;
20 if (!pathspec)
21 return 0;
23 path = *pathspec;
24 slash = strrchr(path, '/');
25 if (!slash)
26 return 0;
28 prefix = slash - path + 1;
29 while ((next = *++pathspec) != NULL) {
30 int len = strlen(next);
31 if (len >= prefix && !memcmp(path, next, len))
32 continue;
33 for (;;) {
34 if (!len)
35 return 0;
36 if (next[--len] != '/')
37 continue;
38 if (memcmp(path, next, len+1))
39 continue;
40 prefix = len + 1;
41 break;
42 }
43 }
44 return prefix;
45 }
47 static int match_one(const char *match, const char *name, int namelen)
48 {
49 int matchlen;
51 /* If the match was just the prefix, we matched */
52 matchlen = strlen(match);
53 if (!matchlen)
54 return 1;
56 /*
57 * If we don't match the matchstring exactly,
58 * we need to match by fnmatch
59 */
60 if (strncmp(match, name, matchlen))
61 return !fnmatch(match, name, 0);
63 /*
64 * If we did match the string exactly, we still
65 * need to make sure that it happened on a path
66 * component boundary (ie either the last character
67 * of the match was '/', or the next character of
68 * the name was '/' or the terminating NUL.
69 */
70 return match[matchlen-1] == '/' ||
71 name[matchlen] == '/' ||
72 !name[matchlen];
73 }
75 static int match(const char **pathspec, const char *name, int namelen, int prefix, char *seen)
76 {
77 int retval;
78 const char *match;
80 name += prefix;
81 namelen -= prefix;
83 for (retval = 0; (match = *pathspec++) != NULL; seen++) {
84 if (retval & *seen)
85 continue;
86 match += prefix;
87 if (match_one(match, name, namelen)) {
88 retval = 1;
89 *seen = 1;
90 }
91 }
92 return retval;
93 }
95 static void prune_directory(struct dir_struct *dir, const char **pathspec, int prefix)
96 {
97 char *seen;
98 int i, specs;
99 struct dir_entry **src, **dst;
101 for (specs = 0; pathspec[specs]; specs++)
102 /* nothing */;
103 seen = xmalloc(specs);
104 memset(seen, 0, specs);
106 src = dst = dir->entries;
107 i = dir->nr;
108 while (--i >= 0) {
109 struct dir_entry *entry = *src++;
110 if (!match(pathspec, entry->name, entry->len, prefix, seen)) {
111 free(entry);
112 continue;
113 }
114 *dst++ = entry;
115 }
116 dir->nr = dst - dir->entries;
118 for (i = 0; i < specs; i++) {
119 struct stat st;
120 const char *match;
121 if (seen[i])
122 continue;
124 /* Existing file? We must have ignored it */
125 match = pathspec[i];
126 if (!lstat(match, &st))
127 continue;
128 die("pathspec '%s' did not match any files", match);
129 }
130 }
132 static void fill_directory(struct dir_struct *dir, const char **pathspec)
133 {
134 const char *path, *base;
135 int baselen;
137 /* Set up the default git porcelain excludes */
138 memset(dir, 0, sizeof(*dir));
139 dir->exclude_per_dir = ".gitignore";
140 path = git_path("info/exclude");
141 if (!access(path, R_OK))
142 add_excludes_from_file(dir, path);
144 /*
145 * Calculate common prefix for the pathspec, and
146 * use that to optimize the directory walk
147 */
148 baselen = common_prefix(pathspec);
149 path = ".";
150 base = "";
151 if (baselen) {
152 char *common = xmalloc(baselen + 1);
153 common = xmalloc(baselen + 1);
154 memcpy(common, *pathspec, baselen);
155 common[baselen] = 0;
156 path = base = common;
157 }
159 /* Read the directory and prune it */
160 read_directory(dir, path, base, baselen);
161 if (pathspec)
162 prune_directory(dir, pathspec, baselen);
163 }
165 static int add_file_to_index(const char *path, int verbose)
166 {
167 int size, namelen;
168 struct stat st;
169 struct cache_entry *ce;
171 if (lstat(path, &st))
172 die("%s: unable to stat (%s)", path, strerror(errno));
174 if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode))
175 die("%s: can only add regular files or symbolic links", path);
177 namelen = strlen(path);
178 size = cache_entry_size(namelen);
179 ce = xcalloc(1, size);
180 memcpy(ce->name, path, namelen);
181 ce->ce_flags = htons(namelen);
182 fill_stat_cache_info(ce, &st);
184 ce->ce_mode = create_ce_mode(st.st_mode);
185 if (!trust_executable_bit) {
186 /* If there is an existing entry, pick the mode bits
187 * from it.
188 */
189 int pos = cache_name_pos(path, namelen);
190 if (pos >= 0)
191 ce->ce_mode = active_cache[pos]->ce_mode;
192 }
194 if (index_path(ce->sha1, path, &st, 1))
195 die("unable to index file %s", path);
196 if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD))
197 die("unable to add %s to index",path);
198 if (verbose)
199 printf("add '%s'\n", path);
200 return 0;
201 }
203 static struct cache_file cache_file;
205 int cmd_add(int argc, const char **argv, char **envp)
206 {
207 int i, newfd;
208 int verbose = 0, show_only = 0;
209 const char *prefix = setup_git_directory();
210 const char **pathspec;
211 struct dir_struct dir;
213 git_config(git_default_config);
215 newfd = hold_index_file_for_update(&cache_file, get_index_file());
216 if (newfd < 0)
217 die("unable to create new cachefile");
219 if (read_cache() < 0)
220 die("index file corrupt");
222 for (i = 1; i < argc; i++) {
223 const char *arg = argv[i];
225 if (arg[0] != '-')
226 break;
227 if (!strcmp(arg, "--")) {
228 i++;
229 break;
230 }
231 if (!strcmp(arg, "-n")) {
232 show_only = 1;
233 continue;
234 }
235 if (!strcmp(arg, "-v")) {
236 verbose = 1;
237 continue;
238 }
239 die(builtin_add_usage);
240 }
241 git_config(git_default_config);
242 pathspec = get_pathspec(prefix, argv + i);
244 fill_directory(&dir, pathspec);
246 if (show_only) {
247 const char *sep = "", *eof = "";
248 for (i = 0; i < dir.nr; i++) {
249 printf("%s%s", sep, dir.entries[i]->name);
250 sep = " ";
251 eof = "\n";
252 }
253 fputs(eof, stdout);
254 return 0;
255 }
257 for (i = 0; i < dir.nr; i++)
258 add_file_to_index(dir.entries[i]->name, verbose);
260 if (active_cache_changed) {
261 if (write_cache(newfd, active_cache, active_nr) ||
262 commit_index_file(&cache_file))
263 die("Unable to write new index file");
264 }
266 return 0;
267 }