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   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 }