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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
  12 static const char builtin_add_usage[] =
  13 "git-add [-n] [-v] [-f] [--interactive | -i] [--] <filepattern>...";
  14
  15 static const char *excludes_file;
  16
  17 static void prune_directory(struct dir_struct *dir, const char **pathspec, int prefix)
  18 {
  19         char *seen;
  20         int i, specs;
  21         struct dir_entry **src, **dst;
  22
  23         for (specs = 0; pathspec[specs];  specs++)
  24                 /* nothing */;
  25         seen = xcalloc(specs, 1);
  26
  27         src = dst = dir->entries;
  28         i = dir->nr;
  29         while (--i >= 0) {
  30                 struct dir_entry *entry = *src++;
  31                 if (match_pathspec(pathspec, entry->name, entry->len,
  32                                    prefix, seen))
  33                         *dst++ = entry;
  34         }
  35         dir->nr = dst - dir->entries;
  36
  37         for (i = 0; i < specs; i++) {
  38                 struct stat st;
  39                 const char *match;
  40                 if (seen[i])
  41                         continue;
  42
  43                 match = pathspec[i];
  44                 if (!match[0])
  45                         continue;
  46
  47                 /* Existing file? We must have ignored it */
  48                 if (!lstat(match, &st)) {
  49                         struct dir_entry *ent;
  50
  51                         ent = dir_add_name(dir, match, strlen(match));
  52                         ent->ignored = 1;
  53                         if (S_ISDIR(st.st_mode))
  54                                 ent->ignored_dir = 1;
  55                         continue;
  56                 }
  57                 die("pathspec '%s' did not match any files", match);
  58         }
  59 }
  60
  61 static void fill_directory(struct dir_struct *dir, const char **pathspec)
  62 {
  63         const char *path, *base;
  64         int baselen;
  65
  66         /* Set up the default git porcelain excludes */
  67         memset(dir, 0, sizeof(*dir));
  68         dir->exclude_per_dir = ".gitignore";
  69         path = git_path("info/exclude");
  70         if (!access(path, R_OK))
  71                 add_excludes_from_file(dir, path);
  72         if (!access(excludes_file, R_OK))
  73                 add_excludes_from_file(dir, excludes_file);
  74
  75         /*
  76          * Calculate common prefix for the pathspec, and
  77          * use that to optimize the directory walk
  78          */
  79         baselen = common_prefix(pathspec);
  80         path = ".";
  81         base = "";
  82         if (baselen) {
  83                 char *common = xmalloc(baselen + 1);
  84                 memcpy(common, *pathspec, baselen);
  85                 common[baselen] = 0;
  86                 path = base = common;
  87         }
  88
  89         /* Read the directory and prune it */
  90         read_directory(dir, path, base, baselen, pathspec);
  91         if (pathspec)
  92                 prune_directory(dir, pathspec, baselen);
  93 }
  94
  95 static int git_add_config(const char *var, const char *value)
  96 {
  97         if (!strcmp(var, "core.excludesfile")) {
  98                 if (!value)
  99                         die("core.excludesfile without value");
 100                 excludes_file = xstrdup(value);
 101                 return 0;
 102         }
 103
 104         return git_default_config(var, value);
 105 }
 106
 107 static struct lock_file lock_file;
 108
 109 static const char ignore_warning[] =
 110 "The following paths are ignored by one of your .gitignore files:\n";
 111
 112 int cmd_add(int argc, const char **argv, const char *prefix)
 113 {
 114         int i, newfd;
 115         int verbose = 0, show_only = 0, ignored_too = 0;
 116         const char **pathspec;
 117         struct dir_struct dir;
 118         int add_interactive = 0;
 119
 120         for (i = 1; i < argc; i++) {
 121                 if (!strcmp("--interactive", argv[i]) ||
 122                     !strcmp("-i", argv[i]))
 123                         add_interactive++;
 124         }
 125         if (add_interactive) {
 126                 const char *args[] = { "add--interactive", NULL };
 127
 128                 if (add_interactive != 1 || argc != 2)
 129                         die("add --interactive does not take any parameters");
 130                 execv_git_cmd(args);
 131                 exit(1);
 132         }
 133
 134         git_config(git_add_config);
 135
 136         newfd = hold_lock_file_for_update(&lock_file, get_index_file(), 1);
 137
 138         for (i = 1; i < argc; i++) {
 139                 const char *arg = argv[i];
 140
 141                 if (arg[0] != '-')
 142                         break;
 143                 if (!strcmp(arg, "--")) {
 144                         i++;
 145                         break;
 146                 }
 147                 if (!strcmp(arg, "-n")) {
 148                         show_only = 1;
 149                         continue;
 150                 }
 151                 if (!strcmp(arg, "-f")) {
 152                         ignored_too = 1;
 153                         continue;
 154                 }
 155                 if (!strcmp(arg, "-v")) {
 156                         verbose = 1;
 157                         continue;
 158                 }
 159                 usage(builtin_add_usage);
 160         }
 161         if (argc <= i) {
 162                 fprintf(stderr, "Nothing specified, nothing added.\n");
 163                 fprintf(stderr, "Maybe you wanted to say 'git add .'?\n");
 164                 return 0;
 165         }
 166         pathspec = get_pathspec(prefix, argv + i);
 167
 168         fill_directory(&dir, pathspec);
 169
 170         if (show_only) {
 171                 const char *sep = "", *eof = "";
 172                 for (i = 0; i < dir.nr; i++) {
 173                         if (!ignored_too && dir.entries[i]->ignored)
 174                                 continue;
 175                         printf("%s%s", sep, dir.entries[i]->name);
 176                         sep = " ";
 177                         eof = "\n";
 178                 }
 179                 fputs(eof, stdout);
 180                 return 0;
 181         }
 182
 183         if (read_cache() < 0)
 184                 die("index file corrupt");
 185
 186         if (!ignored_too) {
 187                 int has_ignored = 0;
 188                 for (i = 0; i < dir.nr; i++)
 189                         if (dir.entries[i]->ignored)
 190                                 has_ignored = 1;
 191                 if (has_ignored) {
 192                         fprintf(stderr, ignore_warning);
 193                         for (i = 0; i < dir.nr; i++) {
 194                                 if (!dir.entries[i]->ignored)
 195                                         continue;
 196                                 fprintf(stderr, "%s", dir.entries[i]->name);
 197                                 if (dir.entries[i]->ignored_dir)
 198                                         fprintf(stderr, " (directory)");
 199                                 fputc('\n', stderr);
 200                         }
 201                         fprintf(stderr,
 202                                 "Use -f if you really want to add them.\n");
 203                         exit(1);
 204                 }
 205         }
 206
 207         for (i = 0; i < dir.nr; i++)
 208                 add_file_to_cache(dir.entries[i]->name, verbose);
 209
 210         if (active_cache_changed) {
 211                 if (write_cache(newfd, active_cache, active_nr) ||
 212                     close(newfd) || commit_lock_file(&lock_file))
 213                         die("Unable to write new index file");
 214         }
 215
 216         return 0;
 217 }