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 #include "run-command.h"
  16
  17 static const char builtin_add_usage[] =
  18 "git-add [-n] [-v] [-f] [--interactive | -i] [-u] [--refresh] [--] <filepattern>...";
  19
  20 static int take_worktree_changes;
  21 static const char *excludes_file;
  22
  23 static void prune_directory(struct dir_struct *dir, const char **pathspec, int prefix)
  24 {
  25         char *seen;
  26         int i, specs;
  27         struct dir_entry **src, **dst;
  28
  29         for (specs = 0; pathspec[specs];  specs++)
  30                 /* nothing */;
  31         seen = xcalloc(specs, 1);
  32
  33         src = dst = dir->entries;
  34         i = dir->nr;
  35         while (--i >= 0) {
  36                 struct dir_entry *entry = *src++;
  37                 if (match_pathspec(pathspec, entry->name, entry->len,
  38                                    prefix, seen))
  39                         *dst++ = entry;
  40         }
  41         dir->nr = dst - dir->entries;
  42
  43         for (i = 0; i < specs; i++) {
  44                 if (!seen[i] && !file_exists(pathspec[i]))
  45                         die("pathspec '%s' did not match any files",
  46                                         pathspec[i]);
  47         }
  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                 path = base = xmemdupz(*pathspec, baselen);
  77
  78         /* Read the directory and prune it */
  79         read_directory(dir, path, base, baselen, pathspec);
  80         if (pathspec)
  81                 prune_directory(dir, pathspec, baselen);
  82 }
  83
  84 static void update_callback(struct diff_queue_struct *q,
  85                             struct diff_options *opt, void *cbdata)
  86 {
  87         int i, verbose;
  88
  89         verbose = *((int *)cbdata);
  90         for (i = 0; i < q->nr; i++) {
  91                 struct diff_filepair *p = q->queue[i];
  92                 const char *path = p->one->path;
  93                 switch (p->status) {
  94                 default:
  95                         die("unexpected diff status %c", p->status);
  96                 case DIFF_STATUS_UNMERGED:
  97                 case DIFF_STATUS_MODIFIED:
  98                 case DIFF_STATUS_TYPE_CHANGED:
  99                         add_file_to_cache(path, verbose);
 100                         break;
 101                 case DIFF_STATUS_DELETED:
 102                         remove_file_from_cache(path);
 103                         if (verbose)
 104                                 printf("remove '%s'\n", path);
 105                         break;
 106                 }
 107         }
 108 }
 109
 110 void add_files_to_cache(int verbose, const char *prefix, const char **files)
 111 {
 112         struct rev_info rev;
 113         init_revisions(&rev, prefix);
 114         setup_revisions(0, NULL, &rev, NULL);
 115         rev.prune_data = get_pathspec(prefix, files);
 116         rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
 117         rev.diffopt.format_callback = update_callback;
 118         rev.diffopt.format_callback_data = &verbose;
 119         run_diff_files(&rev, 0);
 120 }
 121
 122 static void refresh(int verbose, const char **pathspec)
 123 {
 124         char *seen;
 125         int i, specs;
 126
 127         for (specs = 0; pathspec[specs];  specs++)
 128                 /* nothing */;
 129         seen = xcalloc(specs, 1);
 130         if (read_cache() < 0)
 131                 die("index file corrupt");
 132         refresh_index(&the_index, verbose ? 0 : REFRESH_QUIET, pathspec, seen);
 133         for (i = 0; i < specs; i++) {
 134                 if (!seen[i])
 135                         die("pathspec '%s' did not match any files", pathspec[i]);
 136         }
 137 }
 138
 139 static int git_add_config(const char *var, const char *value)
 140 {
 141         if (!strcmp(var, "core.excludesfile")) {
 142                 if (!value)
 143                         die("core.excludesfile without value");
 144                 excludes_file = xstrdup(value);
 145                 return 0;
 146         }
 147
 148         return git_default_config(var, value);
 149 }
 150
 151 int interactive_add(void)
 152 {
 153         const char *argv[2] = { "add--interactive", NULL };
 154
 155         return run_command_v_opt(argv, RUN_GIT_CMD);
 156 }
 157
 158 static struct lock_file lock_file;
 159
 160 static const char ignore_error[] =
 161 "The following paths are ignored by one of your .gitignore files:\n";
 162
 163 int cmd_add(int argc, const char **argv, const char *prefix)
 164 {
 165         int i, newfd;
 166         int verbose = 0, show_only = 0, ignored_too = 0, refresh_only = 0;
 167         const char **pathspec;
 168         struct dir_struct dir;
 169         int add_interactive = 0;
 170
 171         for (i = 1; i < argc; i++) {
 172                 if (!strcmp("--interactive", argv[i]) ||
 173                     !strcmp("-i", argv[i]))
 174                         add_interactive++;
 175         }
 176         if (add_interactive) {
 177                 if (argc != 2)
 178                         die("add --interactive does not take any parameters");
 179                 exit(interactive_add());
 180         }
 181
 182         git_config(git_add_config);
 183
 184         newfd = hold_locked_index(&lock_file, 1);
 185
 186         for (i = 1; i < argc; i++) {
 187                 const char *arg = argv[i];
 188
 189                 if (arg[0] != '-')
 190                         break;
 191                 if (!strcmp(arg, "--")) {
 192                         i++;
 193                         break;
 194                 }
 195                 if (!strcmp(arg, "-n")) {
 196                         show_only = 1;
 197                         continue;
 198                 }
 199                 if (!strcmp(arg, "-f")) {
 200                         ignored_too = 1;
 201                         continue;
 202                 }
 203                 if (!strcmp(arg, "-v")) {
 204                         verbose = 1;
 205                         continue;
 206                 }
 207                 if (!strcmp(arg, "-u")) {
 208                         take_worktree_changes = 1;
 209                         continue;
 210                 }
 211                 if (!strcmp(arg, "--refresh")) {
 212                         refresh_only = 1;
 213                         continue;
 214                 }
 215                 usage(builtin_add_usage);
 216         }
 217
 218         if (take_worktree_changes) {
 219                 if (read_cache() < 0)
 220                         die("index file corrupt");
 221                 add_files_to_cache(verbose, prefix, argv + i);
 222                 goto finish;
 223         }
 224
 225         if (argc <= i) {
 226                 fprintf(stderr, "Nothing specified, nothing added.\n");
 227                 fprintf(stderr, "Maybe you wanted to say 'git add .'?\n");
 228                 return 0;
 229         }
 230         pathspec = get_pathspec(prefix, argv + i);
 231
 232         if (refresh_only) {
 233                 refresh(verbose, pathspec);
 234                 goto finish;
 235         }
 236
 237         fill_directory(&dir, pathspec, ignored_too);
 238
 239         if (show_only) {
 240                 const char *sep = "", *eof = "";
 241                 for (i = 0; i < dir.nr; i++) {
 242                         printf("%s%s", sep, dir.entries[i]->name);
 243                         sep = " ";
 244                         eof = "\n";
 245                 }
 246                 fputs(eof, stdout);
 247                 return 0;
 248         }
 249
 250         if (read_cache() < 0)
 251                 die("index file corrupt");
 252
 253         if (dir.ignored_nr) {
 254                 fprintf(stderr, ignore_error);
 255                 for (i = 0; i < dir.ignored_nr; i++) {
 256                         fprintf(stderr, "%s\n", dir.ignored[i]->name);
 257                 }
 258                 fprintf(stderr, "Use -f if you really want to add them.\n");
 259                 die("no files added");
 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 }