use mode of the tree in git-diff, if <tree>:<file> syntax is used
[git] / builtin-add.c
1 /*
2  * "git add" builtin command
3  *
4  * Copyright (C) 2006 Linus Torvalds
5  */
6 #include "cache.h"
7 #include "builtin.h"
8 #include "dir.h"
9 #include "exec_cmd.h"
10 #include "cache-tree.h"
11 #include "diff.h"
12 #include "diffcore.h"
13 #include "commit.h"
14 #include "revision.h"
15
16 static const char builtin_add_usage[] =
17 "git-add [-n] [-v] [-f] [--interactive | -i] [-u] [--] <filepattern>...";
18
19 static int take_all_worktree_changes;
20 static const char *excludes_file;
21
22 static void prune_directory(struct dir_struct *dir, const char **pathspec, int prefix)
23 {
24         char *seen;
25         int i, specs;
26         struct dir_entry **src, **dst;
27
28         for (specs = 0; pathspec[specs];  specs++)
29                 /* nothing */;
30         seen = xcalloc(specs, 1);
31
32         src = dst = dir->entries;
33         i = dir->nr;
34         while (--i >= 0) {
35                 struct dir_entry *entry = *src++;
36                 if (match_pathspec(pathspec, entry->name, entry->len,
37                                    prefix, seen))
38                         *dst++ = entry;
39         }
40         dir->nr = dst - dir->entries;
41
42         for (i = 0; i < specs; i++) {
43                 struct stat st;
44                 const char *match;
45                 if (seen[i])
46                         continue;
47
48                 match = pathspec[i];
49                 if (!match[0])
50                         continue;
51
52                 /* Existing file? We must have ignored it */
53                 if (!lstat(match, &st)) {
54                         struct dir_entry *ent;
55
56                         ent = dir_add_name(dir, match, strlen(match));
57                         ent->ignored = 1;
58                         if (S_ISDIR(st.st_mode))
59                                 ent->ignored_dir = 1;
60                         continue;
61                 }
62                 die("pathspec '%s' did not match any files", match);
63         }
64 }
65
66 static void fill_directory(struct dir_struct *dir, const char **pathspec)
67 {
68         const char *path, *base;
69         int baselen;
70
71         /* Set up the default git porcelain excludes */
72         memset(dir, 0, sizeof(*dir));
73         dir->exclude_per_dir = ".gitignore";
74         path = git_path("info/exclude");
75         if (!access(path, R_OK))
76                 add_excludes_from_file(dir, path);
77         if (!access(excludes_file, R_OK))
78                 add_excludes_from_file(dir, excludes_file);
79
80         /*
81          * Calculate common prefix for the pathspec, and
82          * use that to optimize the directory walk
83          */
84         baselen = common_prefix(pathspec);
85         path = ".";
86         base = "";
87         if (baselen) {
88                 char *common = xmalloc(baselen + 1);
89                 memcpy(common, *pathspec, baselen);
90                 common[baselen] = 0;
91                 path = base = common;
92         }
93
94         /* Read the directory and prune it */
95         read_directory(dir, path, base, baselen, pathspec);
96         if (pathspec)
97                 prune_directory(dir, pathspec, baselen);
98 }
99
100 static void update_callback(struct diff_queue_struct *q,
101                             struct diff_options *opt, void *cbdata)
102 {
103         int i, verbose;
104
105         verbose = *((int *)cbdata);
106         for (i = 0; i < q->nr; i++) {
107                 struct diff_filepair *p = q->queue[i];
108                 const char *path = p->one->path;
109                 switch (p->status) {
110                 default:
111                         die("unexpacted diff status %c", p->status);
112                 case DIFF_STATUS_UNMERGED:
113                 case DIFF_STATUS_MODIFIED:
114                         add_file_to_cache(path, verbose);
115                         break;
116                 case DIFF_STATUS_DELETED:
117                         remove_file_from_cache(path);
118                         if (verbose)
119                                 printf("remove '%s'\n", path);
120                         break;
121                 }
122         }
123 }
124
125 static void update_all(int verbose)
126 {
127         struct rev_info rev;
128         init_revisions(&rev, "");
129         setup_revisions(0, NULL, &rev, NULL);
130         rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
131         rev.diffopt.format_callback = update_callback;
132         rev.diffopt.format_callback_data = &verbose;
133         if (read_cache() < 0)
134                 die("index file corrupt");
135         run_diff_files(&rev, 0);
136 }
137
138 static int git_add_config(const char *var, const char *value)
139 {
140         if (!strcmp(var, "core.excludesfile")) {
141                 if (!value)
142                         die("core.excludesfile without value");
143                 excludes_file = xstrdup(value);
144                 return 0;
145         }
146
147         return git_default_config(var, value);
148 }
149
150 static struct lock_file lock_file;
151
152 static const char ignore_warning[] =
153 "The following paths are ignored by one of your .gitignore files:\n";
154
155 int cmd_add(int argc, const char **argv, const char *prefix)
156 {
157         int i, newfd;
158         int verbose = 0, show_only = 0, ignored_too = 0;
159         const char **pathspec;
160         struct dir_struct dir;
161         int add_interactive = 0;
162
163         for (i = 1; i < argc; i++) {
164                 if (!strcmp("--interactive", argv[i]) ||
165                     !strcmp("-i", argv[i]))
166                         add_interactive++;
167         }
168         if (add_interactive) {
169                 const char *args[] = { "add--interactive", NULL };
170
171                 if (add_interactive != 1 || argc != 2)
172                         die("add --interactive does not take any parameters");
173                 execv_git_cmd(args);
174                 exit(1);
175         }
176
177         git_config(git_add_config);
178
179         newfd = hold_locked_index(&lock_file, 1);
180
181         for (i = 1; i < argc; i++) {
182                 const char *arg = argv[i];
183
184                 if (arg[0] != '-')
185                         break;
186                 if (!strcmp(arg, "--")) {
187                         i++;
188                         break;
189                 }
190                 if (!strcmp(arg, "-n")) {
191                         show_only = 1;
192                         continue;
193                 }
194                 if (!strcmp(arg, "-f")) {
195                         ignored_too = 1;
196                         continue;
197                 }
198                 if (!strcmp(arg, "-v")) {
199                         verbose = 1;
200                         continue;
201                 }
202                 if (!strcmp(arg, "-u")) {
203                         take_all_worktree_changes = 1;
204                         continue;
205                 }
206                 usage(builtin_add_usage);
207         }
208
209         if (take_all_worktree_changes) {
210                 if (i < argc)
211                         die("-u and explicit paths are incompatible");
212                 update_all(verbose);
213                 goto finish;
214         }
215
216         if (argc <= i) {
217                 fprintf(stderr, "Nothing specified, nothing added.\n");
218                 fprintf(stderr, "Maybe you wanted to say 'git add .'?\n");
219                 return 0;
220         }
221         pathspec = get_pathspec(prefix, argv + i);
222
223         fill_directory(&dir, pathspec);
224
225         if (show_only) {
226                 const char *sep = "", *eof = "";
227                 for (i = 0; i < dir.nr; i++) {
228                         if (!ignored_too && dir.entries[i]->ignored)
229                                 continue;
230                         printf("%s%s", sep, dir.entries[i]->name);
231                         sep = " ";
232                         eof = "\n";
233                 }
234                 fputs(eof, stdout);
235                 return 0;
236         }
237
238         if (read_cache() < 0)
239                 die("index file corrupt");
240
241         if (!ignored_too) {
242                 int has_ignored = 0;
243                 for (i = 0; i < dir.nr; i++)
244                         if (dir.entries[i]->ignored)
245                                 has_ignored = 1;
246                 if (has_ignored) {
247                         fprintf(stderr, ignore_warning);
248                         for (i = 0; i < dir.nr; i++) {
249                                 if (!dir.entries[i]->ignored)
250                                         continue;
251                                 fprintf(stderr, "%s", dir.entries[i]->name);
252                                 if (dir.entries[i]->ignored_dir)
253                                         fprintf(stderr, " (directory)");
254                                 fputc('\n', stderr);
255                         }
256                         fprintf(stderr,
257                                 "Use -f if you really want to add them.\n");
258                         exit(1);
259                 }
260         }
261
262         for (i = 0; i < dir.nr; i++)
263                 add_file_to_cache(dir.entries[i]->name, verbose);
264
265  finish:
266         if (active_cache_changed) {
267                 if (write_cache(newfd, active_cache, active_nr) ||
268                     close(newfd) || commit_locked_index(&lock_file))
269                         die("Unable to write new index file");
270         }
271
272         return 0;
273 }