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                 if (!match_pathspec(pathspec, entry->name, entry->len, prefix, seen)) {
  30                         free(entry);
  31                         continue;
  32                 }
  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                 /* Existing file? We must have ignored it */
  44                 match = pathspec[i];
  45                 if (!match[0] || !lstat(match, &st))
  46                         continue;
  47                 die("pathspec '%s' did not match any files", match);
  48         }
  49 }
  50
  51 static void fill_directory(struct dir_struct *dir, const char **pathspec)
  52 {
  53         const char *path, *base;
  54         int baselen;
  55
  56         /* Set up the default git porcelain excludes */
  57         memset(dir, 0, sizeof(*dir));
  58         dir->exclude_per_dir = ".gitignore";
  59         path = git_path("info/exclude");
  60         if (!access(path, R_OK))
  61                 add_excludes_from_file(dir, path);
  62
  63         /*
  64          * Calculate common prefix for the pathspec, and
  65          * use that to optimize the directory walk
  66          */
  67         baselen = common_prefix(pathspec);
  68         path = ".";
  69         base = "";
  70         if (baselen) {
  71                 char *common = xmalloc(baselen + 1);
  72                 memcpy(common, *pathspec, baselen);
  73                 common[baselen] = 0;
  74                 path = base = common;
  75         }
  76
  77         /* Read the directory and prune it */
  78         read_directory(dir, path, base, baselen);
  79         if (pathspec)
  80                 prune_directory(dir, pathspec, baselen);
  81 }
  82
  83 static struct lock_file lock_file;
  84
  85 int cmd_add(int argc, const char **argv, const char *prefix)
  86 {
  87         int i, newfd;
  88         int verbose = 0, show_only = 0;
  89         const char **pathspec;
  90         struct dir_struct dir;
  91         int add_interactive = 0;
  92
  93         for (i = 1; i < argc; i++) {
  94                 if (!strcmp("--interactive", argv[i]))
  95                         add_interactive++;
  96         }
  97         if (add_interactive) {
  98                 const char *args[] = { "add--interactive", NULL };
  99
 100                 if (add_interactive != 1 || argc != 2)
 101                         die("add --interactive does not take any parameters");
 102                 execv_git_cmd(args);
 103                 exit(1);
 104         }
 105
 106         git_config(git_default_config);
 107
 108         newfd = hold_lock_file_for_update(&lock_file, get_index_file(), 1);
 109
 110         for (i = 1; i < argc; i++) {
 111                 const char *arg = argv[i];
 112
 113                 if (arg[0] != '-')
 114                         break;
 115                 if (!strcmp(arg, "--")) {
 116                         i++;
 117                         break;
 118                 }
 119                 if (!strcmp(arg, "-n")) {
 120                         show_only = 1;
 121                         continue;
 122                 }
 123                 if (!strcmp(arg, "-v")) {
 124                         verbose = 1;
 125                         continue;
 126                 }
 127                 usage(builtin_add_usage);
 128         }
 129         if (argc <= i) {
 130                 fprintf(stderr, "Nothing specified, nothing added.\n");
 131                 fprintf(stderr, "Maybe you wanted to say 'git add .'?\n");
 132                 return 0;
 133         }
 134         pathspec = get_pathspec(prefix, argv + i);
 135
 136         fill_directory(&dir, pathspec);
 137
 138         if (show_only) {
 139                 const char *sep = "", *eof = "";
 140                 for (i = 0; i < dir.nr; i++) {
 141                         printf("%s%s", sep, dir.entries[i]->name);
 142                         sep = " ";
 143                         eof = "\n";
 144                 }
 145                 fputs(eof, stdout);
 146                 return 0;
 147         }
 148
 149         if (read_cache() < 0)
 150                 die("index file corrupt");
 151
 152         for (i = 0; i < dir.nr; i++)
 153                 add_file_to_index(dir.entries[i]->name, verbose);
 154
 155         if (active_cache_changed) {
 156                 if (write_cache(newfd, active_cache, active_nr) ||
 157                     close(newfd) || commit_lock_file(&lock_file))
 158                         die("Unable to write new index file");
 159         }
 160
 161         return 0;
 162 }