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 "cache-tree.h"
  12
  13 static const char builtin_add_usage[] =
  14 "git-add [-n] [-v] <filepattern>...";
  15
  16 static void prune_directory(struct dir_struct *dir, const char **pathspec, int prefix)
  17 {
  18         char *seen;
  19         int i, specs;
  20         struct dir_entry **src, **dst;
  21
  22         for (specs = 0; pathspec[specs];  specs++)
  23                 /* nothing */;
  24         seen = xcalloc(specs, 1);
  25
  26         src = dst = dir->entries;
  27         i = dir->nr;
  28         while (--i >= 0) {
  29                 struct dir_entry *entry = *src++;
  30                 if (!match_pathspec(pathspec, entry->name, entry->len, prefix, seen)) {
  31                         free(entry);
  32                         continue;
  33                 }
  34                 *dst++ = entry;
  35         }
  36         dir->nr = dst - dir->entries;
  37
  38         for (i = 0; i < specs; i++) {
  39                 struct stat st;
  40                 const char *match;
  41                 if (seen[i])
  42                         continue;
  43
  44                 /* Existing file? We must have ignored it */
  45                 match = pathspec[i];
  46                 if (!match[0] || !lstat(match, &st))
  47                         continue;
  48                 die("pathspec '%s' did not match any files", match);
  49         }
  50 }
  51
  52 static void fill_directory(struct dir_struct *dir, const char **pathspec)
  53 {
  54         const char *path, *base;
  55         int baselen;
  56
  57         /* Set up the default git porcelain excludes */
  58         memset(dir, 0, sizeof(*dir));
  59         dir->exclude_per_dir = ".gitignore";
  60         path = git_path("info/exclude");
  61         if (!access(path, R_OK))
  62                 add_excludes_from_file(dir, path);
  63
  64         /*
  65          * Calculate common prefix for the pathspec, and
  66          * use that to optimize the directory walk
  67          */
  68         baselen = common_prefix(pathspec);
  69         path = ".";
  70         base = "";
  71         if (baselen) {
  72                 char *common = xmalloc(baselen + 1);
  73                 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, char **envp)
  88 {
  89         int i, newfd;
  90         int verbose = 0, show_only = 0;
  91         const char *prefix = setup_git_directory();
  92         const char **pathspec;
  93         struct dir_struct dir;
  94
  95         git_config(git_default_config);
  96
  97         newfd = hold_lock_file_for_update(&lock_file, get_index_file());
  98         if (newfd < 0)
  99                 die("unable to create new index file");
 100
 101         if (read_cache() < 0)
 102                 die("index file corrupt");
 103
 104         for (i = 1; i < argc; i++) {
 105                 const char *arg = argv[i];
 106
 107                 if (arg[0] != '-')
 108                         break;
 109                 if (!strcmp(arg, "--")) {
 110                         i++;
 111                         break;
 112                 }
 113                 if (!strcmp(arg, "-n")) {
 114                         show_only = 1;
 115                         continue;
 116                 }
 117                 if (!strcmp(arg, "-v")) {
 118                         verbose = 1;
 119                         continue;
 120                 }
 121                 die(builtin_add_usage);
 122         }
 123         pathspec = get_pathspec(prefix, argv + i);
 124
 125         fill_directory(&dir, pathspec);
 126
 127         if (show_only) {
 128                 const char *sep = "", *eof = "";
 129                 for (i = 0; i < dir.nr; i++) {
 130                         printf("%s%s", sep, dir.entries[i]->name);
 131                         sep = " ";
 132                         eof = "\n";
 133                 }
 134                 fputs(eof, stdout);
 135                 return 0;
 136         }
 137
 138         for (i = 0; i < dir.nr; i++)
 139                 add_file_to_index(dir.entries[i]->name, verbose);
 140
 141         if (active_cache_changed) {
 142                 if (write_cache(newfd, active_cache, active_nr) ||
 143                     close(newfd) || commit_lock_file(&lock_file))
 144                         die("Unable to write new index file");
 145         }
 146
 147         return 0;
 148 }