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] [--refresh] [--] <filepattern>...";
  18
  19 static int take_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                 if (!seen[i] && !file_exists(pathspec[i]))
  44                         die("pathspec '%s' did not match any files",
  45                                         pathspec[i]);
  46         }
  47         free(seen);
  48 }
  49
  50 static void fill_directory(struct dir_struct *dir, const char **pathspec,
  51                 int ignored_too)
  52 {
  53         const char *path, *base;
  54         int baselen;
  55
  56         /* Set up the default git porcelain excludes */
  57         memset(dir, 0, sizeof(*dir));
  58         if (!ignored_too) {
  59                 dir->collect_ignored = 1;
  60                 dir->exclude_per_dir = ".gitignore";
  61                 path = git_path("info/exclude");
  62                 if (!access(path, R_OK))
  63                         add_excludes_from_file(dir, path);
  64                 if (excludes_file != NULL && !access(excludes_file, R_OK))
  65                         add_excludes_from_file(dir, excludes_file);
  66         }
  67
  68         /*
  69          * Calculate common prefix for the pathspec, and
  70          * use that to optimize the directory walk
  71          */
  72         baselen = common_prefix(pathspec);
  73         path = ".";
  74         base = "";
  75         if (baselen) {
  76                 char *common = xmalloc(baselen + 1);
  77                 memcpy(common, *pathspec, baselen);
  78                 common[baselen] = 0;
  79                 path = base = common;
  80         }
  81
  82         /* Read the directory and prune it */
  83         read_directory(dir, path, base, baselen, pathspec);
  84         if (pathspec)
  85                 prune_directory(dir, pathspec, baselen);
  86 }
  87
  88 static void update_callback(struct diff_queue_struct *q,
  89                             struct diff_options *opt, void *cbdata)
  90 {
  91         int i, verbose;
  92
  93         verbose = *((int *)cbdata);
  94         for (i = 0; i < q->nr; i++) {
  95                 struct diff_filepair *p = q->queue[i];
  96                 const char *path = p->one->path;
  97                 switch (p->status) {
  98                 default:
  99                         die("unexpected diff status %c", p->status);
 100                 case DIFF_STATUS_UNMERGED:
 101                 case DIFF_STATUS_MODIFIED:
 102                 case DIFF_STATUS_TYPE_CHANGED:
 103                         add_file_to_cache(path, verbose);
 104                         break;
 105                 case DIFF_STATUS_DELETED:
 106                         remove_file_from_cache(path);
 107                         cache_tree_invalidate_path(active_cache_tree, path);
 108                         if (verbose)
 109                                 printf("remove '%s'\n", path);
 110                         break;
 111                 }
 112         }
 113 }
 114
 115 static void update(int verbose, const char *prefix, const char **files)
 116 {
 117         struct rev_info rev;
 118         init_revisions(&rev, prefix);
 119         setup_revisions(0, NULL, &rev, NULL);
 120         rev.prune_data = get_pathspec(prefix, files);
 121         rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
 122         rev.diffopt.format_callback = update_callback;
 123         rev.diffopt.format_callback_data = &verbose;
 124         if (read_cache() < 0)
 125                 die("index file corrupt");
 126         run_diff_files(&rev, 0);
 127 }
 128
 129 static void refresh(int verbose, const char **pathspec)
 130 {
 131         char *seen;
 132         int i, specs;
 133
 134         for (specs = 0; pathspec[specs];  specs++)
 135                 /* nothing */;
 136         seen = xcalloc(specs, 1);
 137         if (read_cache() < 0)
 138                 die("index file corrupt");
 139         refresh_index(&the_index, verbose ? 0 : REFRESH_QUIET, pathspec, seen);
 140         for (i = 0; i < specs; i++) {
 141                 if (!seen[i])
 142                         die("pathspec '%s' did not match any files", pathspec[i]);
 143         }
 144         free(seen);
 145 }
 146
 147 static int git_add_config(const char *var, const char *value)
 148 {
 149         if (!strcmp(var, "core.excludesfile")) {
 150                 if (!value)
 151                         die("core.excludesfile without value");
 152                 excludes_file = xstrdup(value);
 153                 return 0;
 154         }
 155
 156         return git_default_config(var, value);
 157 }
 158
 159 static struct lock_file lock_file;
 160
 161 static const char ignore_error[] =
 162 "The following paths are ignored by one of your .gitignore files:\n";
 163
 164 int cmd_add(int argc, const char **argv, const char *prefix)
 165 {
 166         int i, newfd;
 167         int verbose = 0, show_only = 0, ignored_too = 0, refresh_only = 0;
 168         const char **pathspec;
 169         struct dir_struct dir;
 170         int add_interactive = 0;
 171
 172         for (i = 1; i < argc; i++) {
 173                 if (!strcmp("--interactive", argv[i]) ||
 174                     !strcmp("-i", argv[i]))
 175                         add_interactive++;
 176         }
 177         if (add_interactive) {
 178                 const char *args[] = { "add--interactive", NULL };
 179
 180                 if (add_interactive != 1 || argc != 2)
 181                         die("add --interactive does not take any parameters");
 182                 execv_git_cmd(args);
 183                 exit(1);
 184         }
 185
 186         git_config(git_add_config);
 187
 188         newfd = hold_locked_index(&lock_file, 1);
 189
 190         for (i = 1; i < argc; i++) {
 191                 const char *arg = argv[i];
 192
 193                 if (arg[0] != '-')
 194                         break;
 195                 if (!strcmp(arg, "--")) {
 196                         i++;
 197                         break;
 198                 }
 199                 if (!strcmp(arg, "-n")) {
 200                         show_only = 1;
 201                         continue;
 202                 }
 203                 if (!strcmp(arg, "-f")) {
 204                         ignored_too = 1;
 205                         continue;
 206                 }
 207                 if (!strcmp(arg, "-v")) {
 208                         verbose = 1;
 209                         continue;
 210                 }
 211                 if (!strcmp(arg, "-u")) {
 212                         take_worktree_changes = 1;
 213                         continue;
 214                 }
 215                 if (!strcmp(arg, "--refresh")) {
 216                         refresh_only = 1;
 217                         continue;
 218                 }
 219                 usage(builtin_add_usage);
 220         }
 221
 222         if (take_worktree_changes) {
 223                 update(verbose, prefix, argv + i);
 224                 goto finish;
 225         }
 226
 227         if (argc <= i) {
 228                 fprintf(stderr, "Nothing specified, nothing added.\n");
 229                 fprintf(stderr, "Maybe you wanted to say 'git add .'?\n");
 230                 return 0;
 231         }
 232         pathspec = get_pathspec(prefix, argv + i);
 233
 234         if (refresh_only) {
 235                 refresh(verbose, pathspec);
 236                 goto finish;
 237         }
 238
 239         fill_directory(&dir, pathspec, ignored_too);
 240
 241         if (show_only) {
 242                 const char *sep = "", *eof = "";
 243                 for (i = 0; i < dir.nr; i++) {
 244                         printf("%s%s", sep, dir.entries[i]->name);
 245                         sep = " ";
 246                         eof = "\n";
 247                 }
 248                 fputs(eof, stdout);
 249                 return 0;
 250         }
 251
 252         if (read_cache() < 0)
 253                 die("index file corrupt");
 254
 255         if (dir.ignored_nr) {
 256                 fprintf(stderr, ignore_error);
 257                 for (i = 0; i < dir.ignored_nr; i++) {
 258                         fprintf(stderr, "%s\n", dir.ignored[i]->name);
 259                 }
 260                 fprintf(stderr, "Use -f if you really want to add them.\n");
 261                 die("no files added");
 262         }
 263
 264         for (i = 0; i < dir.nr; i++)
 265                 add_file_to_cache(dir.entries[i]->name, verbose);
 266
 267  finish:
 268         if (active_cache_changed) {
 269                 if (write_cache(newfd, active_cache, active_nr) ||
 270                     close(newfd) || commit_locked_index(&lock_file))
 271                         die("Unable to write new index file");
 272         }
 273
 274         return 0;
 275 }