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
  12 static const char builtin_add_usage[] =
  13 "git-add [-n] [-v] [-f] [--interactive] [--] <filepattern>...";
  14
  15 static void prune_directory(struct dir_struct *dir, const char **pathspec, int prefix)
  16 {
  17         char *seen;
  18         int i, specs;
  19         struct dir_entry **src, **dst;
  20
  21         for (specs = 0; pathspec[specs];  specs++)
  22                 /* nothing */;
  23         seen = xcalloc(specs, 1);
  24
  25         src = dst = dir->entries;
  26         i = dir->nr;
  27         while (--i >= 0) {
  28                 struct dir_entry *entry = *src++;
  29                 int how = match_pathspec(pathspec, entry->name, entry->len,
  30                                          prefix, seen);
  31                 /*
  32                  * ignored entries can be added with exact match,
  33                  * but not with glob nor recursive.
  34                  */
  35                 if (!how ||
  36                     (entry->ignored_entry && how != MATCHED_EXACTLY)) {
  37                         free(entry);
  38                         continue;
  39                 }
  40                 *dst++ = entry;
  41         }
  42         dir->nr = dst - dir->entries;
  43
  44         for (i = 0; i < specs; i++) {
  45                 struct stat st;
  46                 const char *match;
  47                 if (seen[i])
  48                         continue;
  49
  50                 /* Existing file? We must have ignored it */
  51                 match = pathspec[i];
  52                 if (!match[0] || !lstat(match, &st))
  53                         continue;
  54                 die("pathspec '%s' did not match any files", match);
  55         }
  56 }
  57
  58 static void fill_directory(struct dir_struct *dir, const char **pathspec)
  59 {
  60         const char *path, *base;
  61         int baselen;
  62
  63         /* Set up the default git porcelain excludes */
  64         memset(dir, 0, sizeof(*dir));
  65         if (pathspec)
  66                 dir->show_both = 1;
  67         dir->exclude_per_dir = ".gitignore";
  68         path = git_path("info/exclude");
  69         if (!access(path, R_OK))
  70                 add_excludes_from_file(dir, path);
  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                 char *common = xmalloc(baselen + 1);
  81                 memcpy(common, *pathspec, baselen);
  82                 common[baselen] = 0;
  83                 path = base = common;
  84         }
  85
  86         /* Read the directory and prune it */
  87         read_directory(dir, path, base, baselen);
  88         if (pathspec)
  89                 prune_directory(dir, pathspec, baselen);
  90 }
  91
  92 static struct lock_file lock_file;
  93
  94 static const char ignore_warning[] =
  95 "The following paths are ignored by one of your .gitignore files:\n";
  96
  97 int cmd_add(int argc, const char **argv, const char *prefix)
  98 {
  99         int i, newfd;
 100         int verbose = 0, show_only = 0, ignored_too = 0;
 101         const char **pathspec;
 102         struct dir_struct dir;
 103         int add_interactive = 0;
 104
 105         for (i = 1; i < argc; i++) {
 106                 if (!strcmp("--interactive", argv[i]))
 107                         add_interactive++;
 108         }
 109         if (add_interactive) {
 110                 const char *args[] = { "add--interactive", NULL };
 111
 112                 if (add_interactive != 1 || argc != 2)
 113                         die("add --interactive does not take any parameters");
 114                 execv_git_cmd(args);
 115                 exit(1);
 116         }
 117
 118         git_config(git_default_config);
 119
 120         newfd = hold_lock_file_for_update(&lock_file, get_index_file(), 1);
 121
 122         for (i = 1; i < argc; i++) {
 123                 const char *arg = argv[i];
 124
 125                 if (arg[0] != '-')
 126                         break;
 127                 if (!strcmp(arg, "--")) {
 128                         i++;
 129                         break;
 130                 }
 131                 if (!strcmp(arg, "-n")) {
 132                         show_only = 1;
 133                         continue;
 134                 }
 135                 if (!strcmp(arg, "-f")) {
 136                         ignored_too = 1;
 137                         continue;
 138                 }
 139                 if (!strcmp(arg, "-v")) {
 140                         verbose = 1;
 141                         continue;
 142                 }
 143                 usage(builtin_add_usage);
 144         }
 145         if (argc <= i) {
 146                 fprintf(stderr, "Nothing specified, nothing added.\n");
 147                 fprintf(stderr, "Maybe you wanted to say 'git add .'?\n");
 148                 return 0;
 149         }
 150         pathspec = get_pathspec(prefix, argv + i);
 151
 152         fill_directory(&dir, pathspec);
 153
 154         if (show_only) {
 155                 const char *sep = "", *eof = "";
 156                 for (i = 0; i < dir.nr; i++) {
 157                         if (!ignored_too && dir.entries[i]->ignored_entry)
 158                                 continue;
 159                         printf("%s%s", sep, dir.entries[i]->name);
 160                         sep = " ";
 161                         eof = "\n";
 162                 }
 163                 fputs(eof, stdout);
 164                 return 0;
 165         }
 166
 167         if (read_cache() < 0)
 168                 die("index file corrupt");
 169
 170         if (!ignored_too) {
 171                 int has_ignored = -1;
 172                 for (i = 0; has_ignored < 0 && i < dir.nr; i++)
 173                         if (dir.entries[i]->ignored_entry)
 174                                 has_ignored = i;
 175                 if (0 <= has_ignored) {
 176                         fprintf(stderr, ignore_warning);
 177                         for (i = has_ignored; i < dir.nr; i++) {
 178                                 if (!dir.entries[i]->ignored_entry)
 179                                         continue;
 180                                 fprintf(stderr, "%s\n", dir.entries[i]->name);
 181                         }
 182                         fprintf(stderr,
 183                                 "Use -f if you really want to add them.\n");
 184                         exit(1);
 185                 }
 186         }
 187
 188         for (i = 0; i < dir.nr; i++)
 189                 add_file_to_index(dir.entries[i]->name, verbose);
 190
 191         if (active_cache_changed) {
 192                 if (write_cache(newfd, active_cache, active_nr) ||
 193                     close(newfd) || commit_lock_file(&lock_file))
 194                         die("Unable to write new index file");
 195         }
 196
 197         return 0;
 198 }