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 = xmalloc(specs);
  25         memset(seen, 0, specs);
  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                 common = xmalloc(baselen + 1);
  75                 memcpy(common, *pathspec, baselen);
  76                 common[baselen] = 0;
  77                 path = base = common;
  78         }
  79
  80         /* Read the directory and prune it */
  81         read_directory(dir, path, base, baselen);
  82         if (pathspec)
  83                 prune_directory(dir, pathspec, baselen);
  84 }
  85
  86 static int add_file_to_index(const char *path, int verbose)
  87 {
  88         int size, namelen;
  89         struct stat st;
  90         struct cache_entry *ce;
  91
  92         if (lstat(path, &st))
  93                 die("%s: unable to stat (%s)", path, strerror(errno));
  94
  95         if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode))
  96                 die("%s: can only add regular files or symbolic links", path);
  97
  98         namelen = strlen(path);
  99         size = cache_entry_size(namelen);
 100         ce = xcalloc(1, size);
 101         memcpy(ce->name, path, namelen);
 102         ce->ce_flags = htons(namelen);
 103         fill_stat_cache_info(ce, &st);
 104
 105         ce->ce_mode = create_ce_mode(st.st_mode);
 106         if (!trust_executable_bit) {
 107                 /* If there is an existing entry, pick the mode bits
 108                  * from it.
 109                  */
 110                 int pos = cache_name_pos(path, namelen);
 111                 if (pos >= 0)
 112                         ce->ce_mode = active_cache[pos]->ce_mode;
 113         }
 114
 115         if (index_path(ce->sha1, path, &st, 1))
 116                 die("unable to index file %s", path);
 117         if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD))
 118                 die("unable to add %s to index",path);
 119         if (verbose)
 120                 printf("add '%s'\n", path);
 121         cache_tree_invalidate_path(active_cache_tree, path);
 122         return 0;
 123 }
 124
 125 static struct lock_file lock_file;
 126
 127 int cmd_add(int argc, const char **argv, char **envp)
 128 {
 129         int i, newfd;
 130         int verbose = 0, show_only = 0;
 131         const char *prefix = setup_git_directory();
 132         const char **pathspec;
 133         struct dir_struct dir;
 134
 135         git_config(git_default_config);
 136
 137         newfd = hold_lock_file_for_update(&lock_file, get_index_file());
 138         if (newfd < 0)
 139                 die("unable to create new index file");
 140
 141         if (read_cache() < 0)
 142                 die("index file corrupt");
 143
 144         for (i = 1; i < argc; i++) {
 145                 const char *arg = argv[i];
 146
 147                 if (arg[0] != '-')
 148                         break;
 149                 if (!strcmp(arg, "--")) {
 150                         i++;
 151                         break;
 152                 }
 153                 if (!strcmp(arg, "-n")) {
 154                         show_only = 1;
 155                         continue;
 156                 }
 157                 if (!strcmp(arg, "-v")) {
 158                         verbose = 1;
 159                         continue;
 160                 }
 161                 die(builtin_add_usage);
 162         }
 163         git_config(git_default_config);
 164         pathspec = get_pathspec(prefix, argv + i);
 165
 166         fill_directory(&dir, pathspec);
 167
 168         if (show_only) {
 169                 const char *sep = "", *eof = "";
 170                 for (i = 0; i < dir.nr; i++) {
 171                         printf("%s%s", sep, dir.entries[i]->name);
 172                         sep = " ";
 173                         eof = "\n";
 174                 }
 175                 fputs(eof, stdout);
 176                 return 0;
 177         }
 178
 179         for (i = 0; i < dir.nr; i++)
 180                 add_file_to_index(dir.entries[i]->name, verbose);
 181
 182         if (active_cache_changed) {
 183                 if (write_cache(newfd, active_cache, active_nr) ||
 184                     commit_lock_file(&lock_file))
 185                         die("Unable to write new index file");
 186         }
 187
 188         return 0;
 189 }