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         free(seen);
  49 }
  50
  51 static void fill_directory(struct dir_struct *dir, const char **pathspec,
  52                 int ignored_too)
  53 {
  54         const char *path, *base;
  55         int baselen;
  56
  57         /* Set up the default git porcelain excludes */
  58         memset(dir, 0, sizeof(*dir));
  59         if (!ignored_too) {
  60                 dir->collect_ignored = 1;
  61                 dir->exclude_per_dir = ".gitignore";
  62                 path = git_path("info/exclude");
  63                 if (!access(path, R_OK))
  64                         add_excludes_from_file(dir, path);
  65                 if (excludes_file != NULL && !access(excludes_file, R_OK))
  66                         add_excludes_from_file(dir, excludes_file);
  67         }
  68
  69         /*
  70          * Calculate common prefix for the pathspec, and
  71          * use that to optimize the directory walk
  72          */
  73         baselen = common_prefix(pathspec);
  74         path = ".";
  75         base = "";
  76         if (baselen)
  77                 path = base = xmemdupz(*pathspec, baselen);
  78
  79         /* Read the directory and prune it */
  80         read_directory(dir, path, base, baselen, pathspec);
  81         if (pathspec)
  82                 prune_directory(dir, pathspec, baselen);
  83 }
  84
  85 static void update_callback(struct diff_queue_struct *q,
  86                             struct diff_options *opt, void *cbdata)
  87 {
  88         int i, verbose;
  89
  90         verbose = *((int *)cbdata);
  91         for (i = 0; i < q->nr; i++) {
  92                 struct diff_filepair *p = q->queue[i];
  93                 const char *path = p->one->path;
  94                 switch (p->status) {
  95                 default:
  96                         die("unexpected diff status %c", p->status);
  97                 case DIFF_STATUS_UNMERGED:
  98                 case DIFF_STATUS_MODIFIED:
  99                 case DIFF_STATUS_TYPE_CHANGED:
 100                         add_file_to_cache(path, verbose);
 101                         break;
 102                 case DIFF_STATUS_DELETED:
 103                         remove_file_from_cache(path);
 104                         if (verbose)
 105                                 printf("remove '%s'\n", path);
 106                         break;
 107                 }
 108         }
 109 }
 110
 111 void add_files_to_cache(int verbose, const char *prefix, const char **files)
 112 {
 113         struct rev_info rev;
 114         init_revisions(&rev, prefix);
 115         setup_revisions(0, NULL, &rev, NULL);
 116         rev.prune_data = get_pathspec(prefix, files);
 117         rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
 118         rev.diffopt.format_callback = update_callback;
 119         rev.diffopt.format_callback_data = &verbose;
 120         run_diff_files(&rev, 0);
 121 }
 122
 123 static void refresh(int verbose, const char **pathspec)
 124 {
 125         char *seen;
 126         int i, specs;
 127
 128         for (specs = 0; pathspec[specs];  specs++)
 129                 /* nothing */;
 130         seen = xcalloc(specs, 1);
 131         if (read_cache() < 0)
 132                 die("index file corrupt");
 133         refresh_index(&the_index, verbose ? 0 : REFRESH_QUIET, pathspec, seen);
 134         for (i = 0; i < specs; i++) {
 135                 if (!seen[i])
 136                         die("pathspec '%s' did not match any files", pathspec[i]);
 137         }
 138         free(seen);
 139 }
 140
 141 static int git_add_config(const char *var, const char *value)
 142 {
 143         if (!strcmp(var, "core.excludesfile")) {
 144                 if (!value)
 145                         die("core.excludesfile without value");
 146                 excludes_file = xstrdup(value);
 147                 return 0;
 148         }
 149
 150         return git_default_config(var, value);
 151 }
 152
 153 int interactive_add(void)
 154 {
 155         const char *argv[2] = { "add--interactive", NULL };
 156
 157         return run_command_v_opt(argv, RUN_GIT_CMD);
 158 }
 159
 160 static struct lock_file lock_file;
 161
 162 static const char ignore_error[] =
 163 "The following paths are ignored by one of your .gitignore files:\n";
 164
 165 int cmd_add(int argc, const char **argv, const char *prefix)
 166 {
 167         int i, newfd;
 168         int verbose = 0, show_only = 0, ignored_too = 0, refresh_only = 0;
 169         const char **pathspec;
 170         struct dir_struct dir;
 171         int add_interactive = 0;
 172
 173         for (i = 1; i < argc; i++) {
 174                 if (!strcmp("--interactive", argv[i]) ||
 175                     !strcmp("-i", argv[i]))
 176                         add_interactive++;
 177         }
 178         if (add_interactive) {
 179                 if (argc != 2)
 180                         die("add --interactive does not take any parameters");
 181                 exit(interactive_add());
 182         }
 183
 184         git_config(git_add_config);
 185
 186         newfd = hold_locked_index(&lock_file, 1);
 187
 188         for (i = 1; i < argc; i++) {
 189                 const char *arg = argv[i];
 190
 191                 if (arg[0] != '-')
 192                         break;
 193                 if (!strcmp(arg, "--")) {
 194                         i++;
 195                         break;
 196                 }
 197                 if (!strcmp(arg, "-n")) {
 198                         show_only = 1;
 199                         continue;
 200                 }
 201                 if (!strcmp(arg, "-f")) {
 202                         ignored_too = 1;
 203                         continue;
 204                 }
 205                 if (!strcmp(arg, "-v")) {
 206                         verbose = 1;
 207                         continue;
 208                 }
 209                 if (!strcmp(arg, "-u")) {
 210                         take_worktree_changes = 1;
 211                         continue;
 212                 }
 213                 if (!strcmp(arg, "--refresh")) {
 214                         refresh_only = 1;
 215                         continue;
 216                 }
 217                 usage(builtin_add_usage);
 218         }
 219
 220         if (take_worktree_changes) {
 221                 if (read_cache() < 0)
 222                         die("index file corrupt");
 223                 add_files_to_cache(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 }