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