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                 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 static void update(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         if (read_cache() < 0)
 120                 die("index file corrupt");
 121         run_diff_files(&rev, 0);
 122 }
 123
 124 static void refresh(int verbose, const char **pathspec)
 125 {
 126         char *seen;
 127         int i, specs;
 128
 129         for (specs = 0; pathspec[specs];  specs++)
 130                 /* nothing */;
 131         seen = xcalloc(specs, 1);
 132         if (read_cache() < 0)
 133                 die("index file corrupt");
 134         refresh_index(&the_index, verbose ? 0 : REFRESH_QUIET, pathspec, seen);
 135         for (i = 0; i < specs; i++) {
 136                 if (!seen[i])
 137                         die("pathspec '%s' did not match any files", pathspec[i]);
 138         }
 139         free(seen);
 140 }
 141
 142 static int git_add_config(const char *var, const char *value)
 143 {
 144         if (!strcmp(var, "core.excludesfile")) {
 145                 if (!value)
 146                         die("core.excludesfile without value");
 147                 excludes_file = xstrdup(value);
 148                 return 0;
 149         }
 150
 151         return git_default_config(var, value);
 152 }
 153
 154 static struct lock_file lock_file;
 155
 156 static const char ignore_error[] =
 157 "The following paths are ignored by one of your .gitignore files:\n";
 158
 159 int cmd_add(int argc, const char **argv, const char *prefix)
 160 {
 161         int i, newfd;
 162         int verbose = 0, show_only = 0, ignored_too = 0, refresh_only = 0;
 163         const char **pathspec;
 164         struct dir_struct dir;
 165         int add_interactive = 0;
 166
 167         for (i = 1; i < argc; i++) {
 168                 if (!strcmp("--interactive", argv[i]) ||
 169                     !strcmp("-i", argv[i]))
 170                         add_interactive++;
 171         }
 172         if (add_interactive) {
 173                 const char *args[] = { "add--interactive", NULL };
 174
 175                 if (add_interactive != 1 || argc != 2)
 176                         die("add --interactive does not take any parameters");
 177                 execv_git_cmd(args);
 178                 exit(1);
 179         }
 180
 181         git_config(git_add_config);
 182
 183         newfd = hold_locked_index(&lock_file, 1);
 184
 185         for (i = 1; i < argc; i++) {
 186                 const char *arg = argv[i];
 187
 188                 if (arg[0] != '-')
 189                         break;
 190                 if (!strcmp(arg, "--")) {
 191                         i++;
 192                         break;
 193                 }
 194                 if (!strcmp(arg, "-n")) {
 195                         show_only = 1;
 196                         continue;
 197                 }
 198                 if (!strcmp(arg, "-f")) {
 199                         ignored_too = 1;
 200                         continue;
 201                 }
 202                 if (!strcmp(arg, "-v")) {
 203                         verbose = 1;
 204                         continue;
 205                 }
 206                 if (!strcmp(arg, "-u")) {
 207                         take_worktree_changes = 1;
 208                         continue;
 209                 }
 210                 if (!strcmp(arg, "--refresh")) {
 211                         refresh_only = 1;
 212                         continue;
 213                 }
 214                 usage(builtin_add_usage);
 215         }
 216
 217         if (take_worktree_changes) {
 218                 update(verbose, prefix, argv + i);
 219                 goto finish;
 220         }
 221
 222         if (argc <= i) {
 223                 fprintf(stderr, "Nothing specified, nothing added.\n");
 224                 fprintf(stderr, "Maybe you wanted to say 'git add .'?\n");
 225                 return 0;
 226         }
 227         pathspec = get_pathspec(prefix, argv + i);
 228
 229         if (refresh_only) {
 230                 refresh(verbose, pathspec);
 231                 goto finish;
 232         }
 233
 234         fill_directory(&dir, pathspec, ignored_too);
 235
 236         if (show_only) {
 237                 const char *sep = "", *eof = "";
 238                 for (i = 0; i < dir.nr; i++) {
 239                         printf("%s%s", sep, dir.entries[i]->name);
 240                         sep = " ";
 241                         eof = "\n";
 242                 }
 243                 fputs(eof, stdout);
 244                 return 0;
 245         }
 246
 247         if (read_cache() < 0)
 248                 die("index file corrupt");
 249
 250         if (dir.ignored_nr) {
 251                 fprintf(stderr, ignore_error);
 252                 for (i = 0; i < dir.ignored_nr; i++) {
 253                         fprintf(stderr, "%s\n", dir.ignored[i]->name);
 254                 }
 255                 fprintf(stderr, "Use -f if you really want to add them.\n");
 256                 die("no files added");
 257         }
 258
 259         for (i = 0; i < dir.nr; i++)
 260                 add_file_to_cache(dir.entries[i]->name, verbose);
 261
 262  finish:
 263         if (active_cache_changed) {
 264                 if (write_cache(newfd, active_cache, active_nr) ||
 265                     close(newfd) || commit_locked_index(&lock_file))
 266                         die("Unable to write new index file");
 267         }
 268
 269         return 0;
 270 }