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 #include "parse-options.h"
  17
  18 static const char * const builtin_add_usage[] = {
  19         "git-add [options] [--] <filepattern>...",
  20         NULL
  21 };
  22
  23 static int take_worktree_changes;
  24 static const char *excludes_file;
  25
  26 static void prune_directory(struct dir_struct *dir, const char **pathspec, int prefix)
  27 {
  28         char *seen;
  29         int i, specs;
  30         struct dir_entry **src, **dst;
  31
  32         for (specs = 0; pathspec[specs];  specs++)
  33                 /* nothing */;
  34         seen = xcalloc(specs, 1);
  35
  36         src = dst = dir->entries;
  37         i = dir->nr;
  38         while (--i >= 0) {
  39                 struct dir_entry *entry = *src++;
  40                 if (match_pathspec(pathspec, entry->name, entry->len,
  41                                    prefix, seen))
  42                         *dst++ = entry;
  43         }
  44         dir->nr = dst - dir->entries;
  45
  46         for (i = 0; i < specs; i++) {
  47                 if (!seen[i] && !file_exists(pathspec[i]))
  48                         die("pathspec '%s' did not match any files",
  49                                         pathspec[i]);
  50         }
  51         free(seen);
  52 }
  53
  54 static void fill_directory(struct dir_struct *dir, const char **pathspec,
  55                 int ignored_too)
  56 {
  57         const char *path, *base;
  58         int baselen;
  59
  60         /* Set up the default git porcelain excludes */
  61         memset(dir, 0, sizeof(*dir));
  62         if (!ignored_too) {
  63                 dir->collect_ignored = 1;
  64                 dir->exclude_per_dir = ".gitignore";
  65                 path = git_path("info/exclude");
  66                 if (!access(path, R_OK))
  67                         add_excludes_from_file(dir, path);
  68                 if (excludes_file != NULL && !access(excludes_file, R_OK))
  69                         add_excludes_from_file(dir, excludes_file);
  70         }
  71
  72         /*
  73          * Calculate common prefix for the pathspec, and
  74          * use that to optimize the directory walk
  75          */
  76         baselen = common_prefix(pathspec);
  77         path = ".";
  78         base = "";
  79         if (baselen)
  80                 path = base = xmemdupz(*pathspec, baselen);
  81
  82         /* Read the directory and prune it */
  83         read_directory(dir, path, base, baselen, pathspec);
  84         if (pathspec)
  85                 prune_directory(dir, pathspec, baselen);
  86 }
  87
  88 static void update_callback(struct diff_queue_struct *q,
  89                             struct diff_options *opt, void *cbdata)
  90 {
  91         int i, verbose;
  92
  93         verbose = *((int *)cbdata);
  94         for (i = 0; i < q->nr; i++) {
  95                 struct diff_filepair *p = q->queue[i];
  96                 const char *path = p->one->path;
  97                 switch (p->status) {
  98                 default:
  99                         die("unexpected diff status %c", p->status);
 100                 case DIFF_STATUS_UNMERGED:
 101                 case DIFF_STATUS_MODIFIED:
 102                 case DIFF_STATUS_TYPE_CHANGED:
 103                         add_file_to_cache(path, verbose);
 104                         break;
 105                 case DIFF_STATUS_DELETED:
 106                         remove_file_from_cache(path);
 107                         if (verbose)
 108                                 printf("remove '%s'\n", path);
 109                         break;
 110                 }
 111         }
 112 }
 113
 114 void add_files_to_cache(int verbose, const char *prefix, const char **files)
 115 {
 116         struct rev_info rev;
 117         init_revisions(&rev, prefix);
 118         setup_revisions(0, NULL, &rev, NULL);
 119         rev.prune_data = get_pathspec(prefix, files);
 120         rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
 121         rev.diffopt.format_callback = update_callback;
 122         rev.diffopt.format_callback_data = &verbose;
 123         run_diff_files(&rev, DIFF_RACY_IS_MODIFIED);
 124 }
 125
 126 static void refresh(int verbose, const char **pathspec)
 127 {
 128         char *seen;
 129         int i, specs;
 130
 131         for (specs = 0; pathspec[specs];  specs++)
 132                 /* nothing */;
 133         seen = xcalloc(specs, 1);
 134         if (read_cache() < 0)
 135                 die("index file corrupt");
 136         refresh_index(&the_index, verbose ? 0 : REFRESH_QUIET, 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 int git_add_config(const char *var, const char *value)
 145 {
 146         if (!strcmp(var, "core.excludesfile")) {
 147                 if (!value)
 148                         die("core.excludesfile without value");
 149                 excludes_file = xstrdup(value);
 150                 return 0;
 151         }
 152
 153         return git_default_config(var, value);
 154 }
 155
 156 int interactive_add(void)
 157 {
 158         const char *argv[2] = { "add--interactive", NULL };
 159
 160         return run_command_v_opt(argv, RUN_GIT_CMD);
 161 }
 162
 163 static struct lock_file lock_file;
 164
 165 static const char ignore_error[] =
 166 "The following paths are ignored by one of your .gitignore files:\n";
 167
 168 static int verbose = 0, show_only = 0, ignored_too = 0, refresh_only = 0;
 169 static int add_interactive = 0;
 170
 171 static struct option builtin_add_options[] = {
 172         OPT__DRY_RUN(&show_only),
 173         OPT__VERBOSE(&verbose),
 174         OPT_GROUP(""),
 175         OPT_BOOLEAN('i', "interactive", &add_interactive, "interactive picking"),
 176         OPT_BOOLEAN('f', NULL, &ignored_too, "allow adding otherwise ignored files"),
 177         OPT_BOOLEAN('u', NULL, &take_worktree_changes, "update tracked files"),
 178         OPT_BOOLEAN( 0 , "refresh", &refresh_only, "don't add, only refresh the index"),
 179         OPT_END(),
 180 };
 181
 182 int cmd_add(int argc, const char **argv, const char *prefix)
 183 {
 184         int i, newfd, orig_argc = argc;
 185         const char **pathspec;
 186         struct dir_struct dir;
 187
 188         argc = parse_options(argc, argv, builtin_add_options,
 189                           builtin_add_usage, 0);
 190         if (add_interactive) {
 191                 if (add_interactive != 1 || orig_argc != 2)
 192                         die("add --interactive does not take any parameters");
 193                 exit(interactive_add());
 194         }
 195
 196         git_config(git_add_config);
 197
 198         newfd = hold_locked_index(&lock_file, 1);
 199
 200         if (take_worktree_changes) {
 201                 if (read_cache() < 0)
 202                         die("index file corrupt");
 203                 add_files_to_cache(verbose, prefix, argv);
 204                 goto finish;
 205         }
 206
 207         if (argc == 0) {
 208                 fprintf(stderr, "Nothing specified, nothing added.\n");
 209                 fprintf(stderr, "Maybe you wanted to say 'git add .'?\n");
 210                 return 0;
 211         }
 212         pathspec = get_pathspec(prefix, argv);
 213
 214         if (refresh_only) {
 215                 refresh(verbose, pathspec);
 216                 goto finish;
 217         }
 218
 219         fill_directory(&dir, pathspec, ignored_too);
 220
 221         if (show_only) {
 222                 const char *sep = "", *eof = "";
 223                 for (i = 0; i < dir.nr; i++) {
 224                         printf("%s%s", sep, dir.entries[i]->name);
 225                         sep = " ";
 226                         eof = "\n";
 227                 }
 228                 fputs(eof, stdout);
 229                 return 0;
 230         }
 231
 232         if (read_cache() < 0)
 233                 die("index file corrupt");
 234
 235         if (dir.ignored_nr) {
 236                 fprintf(stderr, ignore_error);
 237                 for (i = 0; i < dir.ignored_nr; i++) {
 238                         fprintf(stderr, "%s\n", dir.ignored[i]->name);
 239                 }
 240                 fprintf(stderr, "Use -f if you really want to add them.\n");
 241                 die("no files added");
 242         }
 243
 244         for (i = 0; i < dir.nr; i++)
 245                 add_file_to_cache(dir.entries[i]->name, verbose);
 246
 247  finish:
 248         if (active_cache_changed) {
 249                 if (write_cache(newfd, active_cache, active_nr) ||
 250                     close(newfd) || commit_locked_index(&lock_file))
 251                         die("Unable to write new index file");
 252         }
 253
 254         return 0;
 255 }