builtin-add.c

   1 /*
   2  * "git add" builtin command
   3  *
   4  * Copyright (C) 2006 Linus Torvalds
   5  */
   6 #include <fnmatch.h>
   7
   8 #include "cache.h"
   9 #include "builtin.h"
  10 #include "dir.h"
  11 #include "exec_cmd.h"
  12 #include "cache-tree.h"
  13
  14 static const char builtin_add_usage[] =
  15 "git-add [-n] [-v] <filepattern>...";
  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, prefix, seen)) {
  32                         free(entry);
  33                         continue;
  34                 }
  35                 *dst++ = entry;
  36         }
  37         dir->nr = dst - dir->entries;
  38
  39         for (i = 0; i < specs; i++) {
  40                 struct stat st;
  41                 const char *match;
  42                 if (seen[i])
  43                         continue;
  44
  45                 /* Existing file? We must have ignored it */
  46                 match = pathspec[i];
  47                 if (!match[0] || !lstat(match, &st))
  48                         continue;
  49                 die("pathspec '%s' did not match any files", match);
  50         }
  51 }
  52
  53 static void fill_directory(struct dir_struct *dir, const char **pathspec)
  54 {
  55         const char *path, *base;
  56         int baselen;
  57
  58         /* Set up the default git porcelain excludes */
  59         memset(dir, 0, sizeof(*dir));
  60         dir->exclude_per_dir = ".gitignore";
  61         path = git_path("info/exclude");
  62         if (!access(path, R_OK))
  63                 add_excludes_from_file(dir, path);
  64
  65         /*
  66          * Calculate common prefix for the pathspec, and
  67          * use that to optimize the directory walk
  68          */
  69         baselen = common_prefix(pathspec);
  70         path = ".";
  71         base = "";
  72         if (baselen) {
  73                 char *common = xmalloc(baselen + 1);
  74                 memcpy(common, *pathspec, baselen);
  75                 common[baselen] = 0;
  76                 path = base = common;
  77         }
  78
  79         /* Read the directory and prune it */
  80         read_directory(dir, path, base, baselen);
  81         if (pathspec)
  82                 prune_directory(dir, pathspec, baselen);
  83 }
  84
  85 static struct lock_file lock_file;
  86
  87 int cmd_add(int argc, const char **argv, const char *prefix)
  88 {
  89         int i, newfd;
  90         int verbose = 0, show_only = 0;
  91         const char **pathspec;
  92         struct dir_struct dir;
  93         int add_interactive = 0;
  94
  95         for (i = 1; i < argc; i++) {
  96                 if (!strcmp("--interactive", argv[i]))
  97                         add_interactive++;
  98         }
  99         if (add_interactive) {
 100                 const char *args[] = { "add--interactive", NULL };
 101
 102                 if (add_interactive != 1 || argc != 2)
 103                         die("add --interactive does not take any parameters");
 104                 execv_git_cmd(args);
 105                 exit(1);
 106         }
 107
 108         git_config(git_default_config);
 109
 110         newfd = hold_lock_file_for_update(&lock_file, get_index_file(), 1);
 111
 112         for (i = 1; i < argc; i++) {
 113                 const char *arg = argv[i];
 114
 115                 if (arg[0] != '-')
 116                         break;
 117                 if (!strcmp(arg, "--")) {
 118                         i++;
 119                         break;
 120                 }
 121                 if (!strcmp(arg, "-n")) {
 122                         show_only = 1;
 123                         continue;
 124                 }
 125                 if (!strcmp(arg, "-v")) {
 126                         verbose = 1;
 127                         continue;
 128                 }
 129                 usage(builtin_add_usage);
 130         }
 131         pathspec = get_pathspec(prefix, argv + i);
 132
 133         fill_directory(&dir, pathspec);
 134
 135         if (show_only) {
 136                 const char *sep = "", *eof = "";
 137                 for (i = 0; i < dir.nr; i++) {
 138                         printf("%s%s", sep, dir.entries[i]->name);
 139                         sep = " ";
 140                         eof = "\n";
 141                 }
 142                 fputs(eof, stdout);
 143                 return 0;
 144         }
 145
 146         if (read_cache() < 0)
 147                 die("index file corrupt");
 148
 149         for (i = 0; i < dir.nr; i++)
 150                 add_file_to_index(dir.entries[i]->name, verbose);
 151
 152         if (active_cache_changed) {
 153                 if (write_cache(newfd, active_cache, active_nr) ||
 154                     close(newfd) || commit_lock_file(&lock_file))
 155                         die("Unable to write new index file");
 156         }
 157
 158         return 0;
 159 }