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] [--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                 if (entry->ignored_entry)
  41                         fprintf(stderr, "warning: '%s' is an ignored path.\n",
  42                                 entry->name);
  43                 *dst++ = entry;
  44         }
  45         dir->nr = dst - dir->entries;
  46
  47         for (i = 0; i < specs; i++) {
  48                 struct stat st;
  49                 const char *match;
  50                 if (seen[i])
  51                         continue;
  52
  53                 /* Existing file? We must have ignored it */
  54                 match = pathspec[i];
  55                 if (!match[0] || !lstat(match, &st))
  56                         continue;
  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         if (pathspec)
  69                 dir->show_both = 1;
  70         dir->exclude_per_dir = ".gitignore";
  71         path = git_path("info/exclude");
  72         if (!access(path, R_OK))
  73                 add_excludes_from_file(dir, path);
  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);
  91         if (pathspec)
  92                 prune_directory(dir, pathspec, baselen);
  93 }
  94
  95 static struct lock_file lock_file;
  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;
 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, "-v")) {
 136                         verbose = 1;
 137                         continue;
 138                 }
 139                 usage(builtin_add_usage);
 140         }
 141         if (argc <= i) {
 142                 fprintf(stderr, "Nothing specified, nothing added.\n");
 143                 fprintf(stderr, "Maybe you wanted to say 'git add .'?\n");
 144                 return 0;
 145         }
 146         pathspec = get_pathspec(prefix, argv + i);
 147
 148         fill_directory(&dir, pathspec);
 149
 150         if (show_only) {
 151                 const char *sep = "", *eof = "";
 152                 for (i = 0; i < dir.nr; i++) {
 153                         printf("%s%s", sep, dir.entries[i]->name);
 154                         sep = " ";
 155                         eof = "\n";
 156                 }
 157                 fputs(eof, stdout);
 158                 return 0;
 159         }
 160
 161         if (read_cache() < 0)
 162                 die("index file corrupt");
 163
 164         for (i = 0; i < dir.nr; i++)
 165                 add_file_to_index(dir.entries[i]->name, verbose);
 166
 167         if (active_cache_changed) {
 168                 if (write_cache(newfd, active_cache, active_nr) ||
 169                     close(newfd) || commit_lock_file(&lock_file))
 170                         die("Unable to write new index file");
 171         }
 172
 173         return 0;
 174 }