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 "run-command.h"
  12 #include "parse-options.h"
  13
  14 static const char * const builtin_add_usage[] = {
  15         "git add [options] [--] <filepattern>...",
  16         NULL
  17 };
  18 static int patch_interactive, add_interactive;
  19 static int take_worktree_changes;
  20
  21 static void fill_pathspec_matches(const char **pathspec, char *seen, int specs)
  22 {
  23         int num_unmatched = 0, i;
  24
  25         /*
  26          * Since we are walking the index as if we were walking the directory,
  27          * we have to mark the matched pathspec as seen; otherwise we will
  28          * mistakenly think that the user gave a pathspec that did not match
  29          * anything.
  30          */
  31         for (i = 0; i < specs; i++)
  32                 if (!seen[i])
  33                         num_unmatched++;
  34         if (!num_unmatched)
  35                 return;
  36         for (i = 0; i < active_nr; i++) {
  37                 struct cache_entry *ce = active_cache[i];
  38                 match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, seen);
  39         }
  40 }
  41
  42 static void prune_directory(struct dir_struct *dir, const char **pathspec, int prefix)
  43 {
  44         char *seen;
  45         int i, specs;
  46         struct dir_entry **src, **dst;
  47
  48         for (specs = 0; pathspec[specs];  specs++)
  49                 /* nothing */;
  50         seen = xcalloc(specs, 1);
  51
  52         src = dst = dir->entries;
  53         i = dir->nr;
  54         while (--i >= 0) {
  55                 struct dir_entry *entry = *src++;
  56                 if (match_pathspec(pathspec, entry->name, entry->len,
  57                                    prefix, seen))
  58                         *dst++ = entry;
  59         }
  60         dir->nr = dst - dir->entries;
  61         fill_pathspec_matches(pathspec, seen, specs);
  62
  63         for (i = 0; i < specs; i++) {
  64                 if (!seen[i] && pathspec[i][0] && !file_exists(pathspec[i]))
  65                         die("pathspec '%s' did not match any files",
  66                                         pathspec[i]);
  67         }
  68         free(seen);
  69 }
  70
  71 static void treat_gitlinks(const char **pathspec)
  72 {
  73         int i;
  74
  75         if (!pathspec || !*pathspec)
  76                 return;
  77
  78         for (i = 0; i < active_nr; i++) {
  79                 struct cache_entry *ce = active_cache[i];
  80                 if (S_ISGITLINK(ce->ce_mode)) {
  81                         int len = ce_namelen(ce), j;
  82                         for (j = 0; pathspec[j]; j++) {
  83                                 int len2 = strlen(pathspec[j]);
  84                                 if (len2 <= len || pathspec[j][len] != '/' ||
  85                                     memcmp(ce->name, pathspec[j], len))
  86                                         continue;
  87                                 if (len2 == len + 1)
  88                                         /* strip trailing slash */
  89                                         pathspec[j] = xstrndup(ce->name, len);
  90                                 else
  91                                         die ("Path '%s' is in submodule '%.*s'",
  92                                                 pathspec[j], len, ce->name);
  93                         }
  94                 }
  95         }
  96 }
  97
  98 static void fill_directory(struct dir_struct *dir, const char **pathspec,
  99                 int ignored_too)
 100 {
 101         const char *path, *base;
 102         int baselen;
 103
 104         /* Set up the default git porcelain excludes */
 105         memset(dir, 0, sizeof(*dir));
 106         if (!ignored_too) {
 107                 dir->flags |= DIR_COLLECT_IGNORED;
 108                 setup_standard_excludes(dir);
 109         }
 110
 111         /*
 112          * Calculate common prefix for the pathspec, and
 113          * use that to optimize the directory walk
 114          */
 115         baselen = common_prefix(pathspec);
 116         path = ".";
 117         base = "";
 118         if (baselen)
 119                 path = base = xmemdupz(*pathspec, baselen);
 120
 121         /* Read the directory and prune it */
 122         read_directory(dir, path, base, baselen, pathspec);
 123         if (pathspec)
 124                 prune_directory(dir, pathspec, baselen);
 125 }
 126
 127 static void refresh(int verbose, const char **pathspec)
 128 {
 129         char *seen;
 130         int i, specs;
 131
 132         for (specs = 0; pathspec[specs];  specs++)
 133                 /* nothing */;
 134         seen = xcalloc(specs, 1);
 135         refresh_index(&the_index, verbose ? REFRESH_SAY_CHANGED : REFRESH_QUIET,
 136                       pathspec, seen);
 137         for (i = 0; i < specs; i++) {
 138                 if (!seen[i])
 139                         die("pathspec '%s' did not match any files", pathspec[i]);
 140         }
 141         free(seen);
 142 }
 143
 144 static const char **validate_pathspec(int argc, const char **argv, const char *prefix)
 145 {
 146         const char **pathspec = get_pathspec(prefix, argv);
 147
 148         if (pathspec) {
 149                 const char **p;
 150                 for (p = pathspec; *p; p++) {
 151                         if (has_symlink_leading_path(*p, strlen(*p))) {
 152                                 int len = prefix ? strlen(prefix) : 0;
 153                                 die("'%s' is beyond a symbolic link", *p + len);
 154                         }
 155                 }
 156         }
 157
 158         return pathspec;
 159 }
 160
 161 int interactive_add(int argc, const char **argv, const char *prefix)
 162 {
 163         int status, ac;
 164         const char **args;
 165         const char **pathspec = NULL;
 166
 167         if (argc) {
 168                 pathspec = validate_pathspec(argc, argv, prefix);
 169                 if (!pathspec)
 170                         return -1;
 171         }
 172
 173         args = xcalloc(sizeof(const char *), (argc + 4));
 174         ac = 0;
 175         args[ac++] = "add--interactive";
 176         if (patch_interactive)
 177                 args[ac++] = "--patch";
 178         args[ac++] = "--";
 179         if (argc) {
 180                 memcpy(&(args[ac]), pathspec, sizeof(const char *) * argc);
 181                 ac += argc;
 182         }
 183         args[ac] = NULL;
 184
 185         status = run_command_v_opt(args, RUN_GIT_CMD);
 186         free(args);
 187         return status;
 188 }
 189
 190 static struct lock_file lock_file;
 191
 192 static const char ignore_error[] =
 193 "The following paths are ignored by one of your .gitignore files:\n";
 194
 195 static int verbose = 0, show_only = 0, ignored_too = 0, refresh_only = 0;
 196 static int ignore_add_errors, addremove, intent_to_add;
 197
 198 static struct option builtin_add_options[] = {
 199         OPT__DRY_RUN(&show_only),
 200         OPT__VERBOSE(&verbose),
 201         OPT_GROUP(""),
 202         OPT_BOOLEAN('i', "interactive", &add_interactive, "interactive picking"),
 203         OPT_BOOLEAN('p', "patch", &patch_interactive, "interactive patching"),
 204         OPT_BOOLEAN('f', "force", &ignored_too, "allow adding otherwise ignored files"),
 205         OPT_BOOLEAN('u', "update", &take_worktree_changes, "update tracked files"),
 206         OPT_BOOLEAN('N', "intent-to-add", &intent_to_add, "record only the fact that the path will be added later"),
 207         OPT_BOOLEAN('A', "all", &addremove, "add all, noticing removal of tracked files"),
 208         OPT_BOOLEAN( 0 , "refresh", &refresh_only, "don't add, only refresh the index"),
 209         OPT_BOOLEAN( 0 , "ignore-errors", &ignore_add_errors, "just skip files which cannot be added because of errors"),
 210         OPT_END(),
 211 };
 212
 213 static int add_config(const char *var, const char *value, void *cb)
 214 {
 215         if (!strcasecmp(var, "add.ignore-errors")) {
 216                 ignore_add_errors = git_config_bool(var, value);
 217                 return 0;
 218         }
 219         return git_default_config(var, value, cb);
 220 }
 221
 222 static int add_files(struct dir_struct *dir, int flags)
 223 {
 224         int i, exit_status = 0;
 225
 226         if (dir->ignored_nr) {
 227                 fprintf(stderr, ignore_error);
 228                 for (i = 0; i < dir->ignored_nr; i++)
 229                         fprintf(stderr, "%s\n", dir->ignored[i]->name);
 230                 fprintf(stderr, "Use -f if you really want to add them.\n");
 231                 die("no files added");
 232         }
 233
 234         for (i = 0; i < dir->nr; i++)
 235                 if (add_file_to_cache(dir->entries[i]->name, flags)) {
 236                         if (!ignore_add_errors)
 237                                 die("adding files failed");
 238                         exit_status = 1;
 239                 }
 240         return exit_status;
 241 }
 242
 243 int cmd_add(int argc, const char **argv, const char *prefix)
 244 {
 245         int exit_status = 0;
 246         int newfd;
 247         const char **pathspec;
 248         struct dir_struct dir;
 249         int flags;
 250         int add_new_files;
 251         int require_pathspec;
 252
 253         git_config(add_config, NULL);
 254
 255         argc = parse_options(argc, argv, builtin_add_options,
 256                           builtin_add_usage, 0);
 257         if (patch_interactive)
 258                 add_interactive = 1;
 259         if (add_interactive)
 260                 exit(interactive_add(argc, argv, prefix));
 261
 262         if (addremove && take_worktree_changes)
 263                 die("-A and -u are mutually incompatible");
 264         if ((addremove || take_worktree_changes) && !argc) {
 265                 static const char *here[2] = { ".", NULL };
 266                 argc = 1;
 267                 argv = here;
 268         }
 269
 270         add_new_files = !take_worktree_changes && !refresh_only;
 271         require_pathspec = !take_worktree_changes;
 272
 273         newfd = hold_locked_index(&lock_file, 1);
 274
 275         flags = ((verbose ? ADD_CACHE_VERBOSE : 0) |
 276                  (show_only ? ADD_CACHE_PRETEND : 0) |
 277                  (intent_to_add ? ADD_CACHE_INTENT : 0) |
 278                  (ignore_add_errors ? ADD_CACHE_IGNORE_ERRORS : 0) |
 279                  (!(addremove || take_worktree_changes)
 280                   ? ADD_CACHE_IGNORE_REMOVAL : 0));
 281
 282         if (require_pathspec && argc == 0) {
 283                 fprintf(stderr, "Nothing specified, nothing added.\n");
 284                 fprintf(stderr, "Maybe you wanted to say 'git add .'?\n");
 285                 return 0;
 286         }
 287         pathspec = validate_pathspec(argc, argv, prefix);
 288
 289         if (read_cache() < 0)
 290                 die("index file corrupt");
 291         treat_gitlinks(pathspec);
 292
 293         if (add_new_files)
 294                 /* This picks up the paths that are not tracked */
 295                 fill_directory(&dir, pathspec, ignored_too);
 296
 297         if (refresh_only) {
 298                 refresh(verbose, pathspec);
 299                 goto finish;
 300         }
 301
 302         exit_status |= add_files_to_cache(prefix, pathspec, flags);
 303
 304         if (add_new_files)
 305                 exit_status |= add_files(&dir, flags);
 306
 307  finish:
 308         if (active_cache_changed) {
 309                 if (write_cache(newfd, active_cache, active_nr) ||
 310                     commit_locked_index(&lock_file))
 311                         die("Unable to write new index file");
 312         }
 313
 314         return exit_status;
 315 }