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] [--] <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 }
  48
  49 static void fill_directory(struct dir_struct *dir, const char **pathspec,
  50                 int ignored_too)
  51 {
  52         const char *path, *base;
  53         int baselen;
  54
  55         /* Set up the default git porcelain excludes */
  56         memset(dir, 0, sizeof(*dir));
  57         if (!ignored_too) {
  58                 dir->collect_ignored = 1;
  59                 dir->exclude_per_dir = ".gitignore";
  60                 path = git_path("info/exclude");
  61                 if (!access(path, R_OK))
  62                         add_excludes_from_file(dir, path);
  63                 if (excludes_file != NULL && !access(excludes_file, R_OK))
  64                         add_excludes_from_file(dir, excludes_file);
  65         }
  66
  67         /*
  68          * Calculate common prefix for the pathspec, and
  69          * use that to optimize the directory walk
  70          */
  71         baselen = common_prefix(pathspec);
  72         path = ".";
  73         base = "";
  74         if (baselen) {
  75                 char *common = xmalloc(baselen + 1);
  76                 memcpy(common, *pathspec, baselen);
  77                 common[baselen] = 0;
  78                 path = base = common;
  79         }
  80
  81         /* Read the directory and prune it */
  82         read_directory(dir, path, base, baselen, pathspec);
  83         if (pathspec)
  84                 prune_directory(dir, pathspec, baselen);
  85 }
  86
  87 static void update_callback(struct diff_queue_struct *q,
  88                             struct diff_options *opt, void *cbdata)
  89 {
  90         int i, verbose;
  91
  92         verbose = *((int *)cbdata);
  93         for (i = 0; i < q->nr; i++) {
  94                 struct diff_filepair *p = q->queue[i];
  95                 const char *path = p->one->path;
  96                 switch (p->status) {
  97                 default:
  98                         die("unexpacted diff status %c", p->status);
  99                 case DIFF_STATUS_UNMERGED:
 100                 case DIFF_STATUS_MODIFIED:
 101                         add_file_to_cache(path, verbose);
 102                         break;
 103                 case DIFF_STATUS_DELETED:
 104                         remove_file_from_cache(path);
 105                         if (verbose)
 106                                 printf("remove '%s'\n", path);
 107                         break;
 108                 }
 109         }
 110 }
 111
 112 static void update(int verbose, const char **files)
 113 {
 114         struct rev_info rev;
 115         init_revisions(&rev, "");
 116         setup_revisions(0, NULL, &rev, NULL);
 117         rev.prune_data = get_pathspec(rev.prefix, files);
 118         rev.diffopt.output_format = DIFF_FORMAT_CALLBACK;
 119         rev.diffopt.format_callback = update_callback;
 120         rev.diffopt.format_callback_data = &verbose;
 121         if (read_cache() < 0)
 122                 die("index file corrupt");
 123         run_diff_files(&rev, 0);
 124 }
 125
 126 static int git_add_config(const char *var, const char *value)
 127 {
 128         if (!strcmp(var, "core.excludesfile")) {
 129                 if (!value)
 130                         die("core.excludesfile without value");
 131                 excludes_file = xstrdup(value);
 132                 return 0;
 133         }
 134
 135         return git_default_config(var, value);
 136 }
 137
 138 static struct lock_file lock_file;
 139
 140 static const char ignore_warning[] =
 141 "The following paths are ignored by one of your .gitignore files:\n";
 142
 143 int cmd_add(int argc, const char **argv, const char *prefix)
 144 {
 145         int i, newfd;
 146         int verbose = 0, show_only = 0, ignored_too = 0;
 147         const char **pathspec;
 148         struct dir_struct dir;
 149         int add_interactive = 0;
 150
 151         for (i = 1; i < argc; i++) {
 152                 if (!strcmp("--interactive", argv[i]) ||
 153                     !strcmp("-i", argv[i]))
 154                         add_interactive++;
 155         }
 156         if (add_interactive) {
 157                 const char *args[] = { "add--interactive", NULL };
 158
 159                 if (add_interactive != 1 || argc != 2)
 160                         die("add --interactive does not take any parameters");
 161                 execv_git_cmd(args);
 162                 exit(1);
 163         }
 164
 165         git_config(git_add_config);
 166
 167         newfd = hold_locked_index(&lock_file, 1);
 168
 169         for (i = 1; i < argc; i++) {
 170                 const char *arg = argv[i];
 171
 172                 if (arg[0] != '-')
 173                         break;
 174                 if (!strcmp(arg, "--")) {
 175                         i++;
 176                         break;
 177                 }
 178                 if (!strcmp(arg, "-n")) {
 179                         show_only = 1;
 180                         continue;
 181                 }
 182                 if (!strcmp(arg, "-f")) {
 183                         ignored_too = 1;
 184                         continue;
 185                 }
 186                 if (!strcmp(arg, "-v")) {
 187                         verbose = 1;
 188                         continue;
 189                 }
 190                 if (!strcmp(arg, "-u")) {
 191                         take_worktree_changes = 1;
 192                         continue;
 193                 }
 194                 usage(builtin_add_usage);
 195         }
 196
 197         if (take_worktree_changes) {
 198                 update(verbose, argv + i);
 199                 goto finish;
 200         }
 201
 202         if (argc <= i) {
 203                 fprintf(stderr, "Nothing specified, nothing added.\n");
 204                 fprintf(stderr, "Maybe you wanted to say 'git add .'?\n");
 205                 return 0;
 206         }
 207         pathspec = get_pathspec(prefix, argv + i);
 208
 209         fill_directory(&dir, pathspec, ignored_too);
 210
 211         if (show_only) {
 212                 const char *sep = "", *eof = "";
 213                 for (i = 0; i < dir.nr; i++) {
 214                         printf("%s%s", sep, dir.entries[i]->name);
 215                         sep = " ";
 216                         eof = "\n";
 217                 }
 218                 fputs(eof, stdout);
 219                 return 0;
 220         }
 221
 222         if (read_cache() < 0)
 223                 die("index file corrupt");
 224
 225         if (dir.ignored_nr) {
 226                 fprintf(stderr, ignore_warning);
 227                 for (i = 0; i < dir.ignored_nr; i++) {
 228                         fprintf(stderr, "%s\n", dir.ignored[i]->name);
 229                 }
 230                 fprintf(stderr, "Use -f if you really want to add them.\n");
 231                 exit(1);
 232         }
 233
 234         for (i = 0; i < dir.nr; i++)
 235                 add_file_to_cache(dir.entries[i]->name, verbose);
 236
 237  finish:
 238         if (active_cache_changed) {
 239                 if (write_cache(newfd, active_cache, active_nr) ||
 240                     close(newfd) || commit_locked_index(&lock_file))
 241                         die("Unable to write new index file");
 242         }
 243
 244         return 0;
 245 }