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 "cache-tree.h"
  10
  11 static const char builtin_add_usage[] =
  12 "git-add [-n] [-v] <filepattern>...";
  13
  14 static void prune_directory(struct dir_struct *dir, const char **pathspec, int prefix)
  15 {
  16         char *seen;
  17         int i, specs;
  18         struct dir_entry **src, **dst;
  19
  20         for (specs = 0; pathspec[specs];  specs++)
  21                 /* nothing */;
  22         seen = xcalloc(specs, 1);
  23
  24         src = dst = dir->entries;
  25         i = dir->nr;
  26         while (--i >= 0) {
  27                 struct dir_entry *entry = *src++;
  28                 if (!match_pathspec(pathspec, entry->name, entry->len, prefix, seen)) {
  29                         free(entry);
  30                         continue;
  31                 }
  32                 *dst++ = entry;
  33         }
  34         dir->nr = dst - dir->entries;
  35
  36         for (i = 0; i < specs; i++) {
  37                 struct stat st;
  38                 const char *match;
  39                 if (seen[i])
  40                         continue;
  41
  42                 /* Existing file? We must have ignored it */
  43                 match = pathspec[i];
  44                 if (!match[0] || !lstat(match, &st))
  45                         continue;
  46                 die("pathspec '%s' did not match any files", match);
  47         }
  48 }
  49
  50 static void fill_directory(struct dir_struct *dir, const char **pathspec)
  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         dir->exclude_per_dir = ".gitignore";
  58         path = git_path("info/exclude");
  59         if (!access(path, R_OK))
  60                 add_excludes_from_file(dir, path);
  61
  62         /*
  63          * Calculate common prefix for the pathspec, and
  64          * use that to optimize the directory walk
  65          */
  66         baselen = common_prefix(pathspec);
  67         path = ".";
  68         base = "";
  69         if (baselen) {
  70                 char *common = xmalloc(baselen + 1);
  71                 memcpy(common, *pathspec, baselen);
  72                 common[baselen] = 0;
  73                 path = base = common;
  74         }
  75
  76         /* Read the directory and prune it */
  77         read_directory(dir, path, base, baselen);
  78         if (pathspec)
  79                 prune_directory(dir, pathspec, baselen);
  80 }
  81
  82 static struct lock_file lock_file;
  83
  84 int cmd_add(int argc, const char **argv, const char *prefix)
  85 {
  86         int i, newfd;
  87         int verbose = 0, show_only = 0;
  88         const char **pathspec;
  89         struct dir_struct dir;
  90
  91         git_config(git_default_config);
  92
  93         newfd = hold_lock_file_for_update(&lock_file, get_index_file(), 1);
  94
  95         for (i = 1; i < argc; i++) {
  96                 const char *arg = argv[i];
  97
  98                 if (arg[0] != '-')
  99                         break;
 100                 if (!strcmp(arg, "--")) {
 101                         i++;
 102                         break;
 103                 }
 104                 if (!strcmp(arg, "-n")) {
 105                         show_only = 1;
 106                         continue;
 107                 }
 108                 if (!strcmp(arg, "-v")) {
 109                         verbose = 1;
 110                         continue;
 111                 }
 112                 usage(builtin_add_usage);
 113         }
 114         if (argc <= i) {
 115                 fprintf(stderr, "Nothing specified, nothing added.\n");
 116                 fprintf(stderr, "Maybe you wanted to say 'git add .'?\n");
 117                 return 0;
 118         }
 119         pathspec = get_pathspec(prefix, argv + i);
 120
 121         fill_directory(&dir, pathspec);
 122
 123         if (show_only) {
 124                 const char *sep = "", *eof = "";
 125                 for (i = 0; i < dir.nr; i++) {
 126                         printf("%s%s", sep, dir.entries[i]->name);
 127                         sep = " ";
 128                         eof = "\n";
 129                 }
 130                 fputs(eof, stdout);
 131                 return 0;
 132         }
 133
 134         if (read_cache() < 0)
 135                 die("index file corrupt");
 136
 137         for (i = 0; i < dir.nr; i++)
 138                 add_file_to_index(dir.entries[i]->name, verbose);
 139
 140         if (active_cache_changed) {
 141                 if (write_cache(newfd, active_cache, active_nr) ||
 142                     close(newfd) || commit_lock_file(&lock_file))
 143                         die("Unable to write new index file");
 144         }
 145
 146         return 0;
 147 }