builtin-mv.c

   1 /*
   2  * "git mv" builtin command
   3  *
   4  * Copyright (C) 2006 Johannes Schindelin
   5  */
   6 #include <fnmatch.h>
   7
   8 #include "cache.h"
   9 #include "builtin.h"
  10 #include "dir.h"
  11 #include "cache-tree.h"
  12 #include "path-list.h"
  13
  14 static const char builtin_mv_usage[] =
  15 "git-mv [-n] [-f] (<source> <destination> | [-k] <source>... <destination>)";
  16
  17 static const char **copy_pathspec(const char *prefix, const char **pathspec,
  18                                   int count, int base_name)
  19 {
  20         const char **result = xmalloc((count + 1) * sizeof(const char *));
  21         memcpy(result, pathspec, count * sizeof(const char *));
  22         result[count] = NULL;
  23         if (base_name) {
  24                 int i;
  25                 for (i = 0; i < count; i++) {
  26                         const char *last_slash = strrchr(result[i], '/');
  27                         if (last_slash)
  28                                 result[i] = last_slash + 1;
  29                 }
  30         }
  31         return get_pathspec(prefix, result);
  32 }
  33
  34 static void show_list(const char *label, struct path_list *list)
  35 {
  36         if (list->nr > 0) {
  37                 int i;
  38                 printf("%s", label);
  39                 for (i = 0; i < list->nr; i++)
  40                         printf("%s%s", i > 0 ? ", " : "", list->items[i].path);
  41                 putchar('\n');
  42         }
  43 }
  44
  45 static const char *add_slash(const char *path)
  46 {
  47         int len = strlen(path);
  48         if (path[len - 1] != '/') {
  49                 char *with_slash = xmalloc(len + 2);
  50                 memcpy(with_slash, path, len);
  51                 strcat(with_slash + len, "/");
  52                 return with_slash;
  53         }
  54         return path;
  55 }
  56
  57 static struct lock_file lock_file;
  58
  59 int cmd_mv(int argc, const char **argv, const char *prefix)
  60 {
  61         int i, newfd, count;
  62         int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
  63         const char **source, **destination, **dest_path;
  64         enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
  65         struct stat st;
  66         struct path_list overwritten = {NULL, 0, 0, 0};
  67         struct path_list src_for_dst = {NULL, 0, 0, 0};
  68         struct path_list added = {NULL, 0, 0, 0};
  69         struct path_list deleted = {NULL, 0, 0, 0};
  70         struct path_list changed = {NULL, 0, 0, 0};
  71
  72         git_config(git_default_config);
  73
  74         newfd = hold_lock_file_for_update(&lock_file, get_index_file());
  75         if (newfd < 0)
  76                 die("unable to create new index file");
  77
  78         if (read_cache() < 0)
  79                 die("index file corrupt");
  80
  81         for (i = 1; i < argc; i++) {
  82                 const char *arg = argv[i];
  83
  84                 if (arg[0] != '-')
  85                         break;
  86                 if (!strcmp(arg, "--")) {
  87                         i++;
  88                         break;
  89                 }
  90                 if (!strcmp(arg, "-n")) {
  91                         show_only = 1;
  92                         continue;
  93                 }
  94                 if (!strcmp(arg, "-f")) {
  95                         force = 1;
  96                         continue;
  97                 }
  98                 if (!strcmp(arg, "-k")) {
  99                         ignore_errors = 1;
 100                         continue;
 101                 }
 102                 die(builtin_mv_usage);
 103         }
 104         count = argc - i - 1;
 105         if (count < 1)
 106                 usage(builtin_mv_usage);
 107
 108         source = copy_pathspec(prefix, argv + i, count, 0);
 109         modes = xcalloc(count, sizeof(enum update_mode));
 110         dest_path = copy_pathspec(prefix, argv + argc - 1, 1, 0);
 111
 112         if (!lstat(dest_path[0], &st) &&
 113                         S_ISDIR(st.st_mode)) {
 114                 dest_path[0] = add_slash(dest_path[0]);
 115                 destination = copy_pathspec(dest_path[0], argv + i, count, 1);
 116         } else {
 117                 if (count != 1)
 118                         usage(builtin_mv_usage);
 119                 destination = dest_path;
 120         }
 121
 122         /* Checking */
 123         for (i = 0; i < count; i++) {
 124                 const char *bad = NULL;
 125
 126                 if (show_only)
 127                         printf("Checking rename of '%s' to '%s'\n",
 128                                 source[i], destination[i]);
 129
 130                 if (lstat(source[i], &st) < 0)
 131                         bad = "bad source";
 132
 133                 if (S_ISDIR(st.st_mode)) {
 134                         const char *dir = source[i], *dest_dir = destination[i];
 135                         int first, last, len = strlen(dir);
 136
 137                         if (lstat(dest_dir, &st) == 0) {
 138                                 bad = "cannot move directory over file";
 139                                 goto next;
 140                         }
 141
 142                         modes[i] = WORKING_DIRECTORY;
 143
 144                         first = cache_name_pos(source[i], len);
 145                         if (first >= 0)
 146                                 die ("Huh? %s/ is in index?", dir);
 147
 148                         first = -1 - first;
 149                         for (last = first; last < active_nr; last++) {
 150                                 const char *path = active_cache[last]->name;
 151                                 if (strncmp(path, dir, len) || path[len] != '/')
 152                                         break;
 153                         }
 154
 155                         if (last - first < 1)
 156                                 bad = "source directory is empty";
 157                         else if (!bad) {
 158                                 int j, dst_len = strlen(dest_dir);
 159
 160                                 if (last - first > 0) {
 161                                         source = realloc(source,
 162                                                         (count + last - first)
 163                                                         * sizeof(char *));
 164                                         destination = realloc(destination,
 165                                                         (count + last - first)
 166                                                         * sizeof(char *));
 167                                         modes = realloc(modes,
 168                                                         (count + last - first)
 169                                                         * sizeof(enum update_mode));
 170                                 }
 171
 172                                 dest_dir = add_slash(dest_dir);
 173
 174                                 for (j = 0; j < last - first; j++) {
 175                                         const char *path =
 176                                                 active_cache[first + j]->name;
 177                                         source[count + j] = path;
 178                                         destination[count + j] =
 179                                                 prefix_path(dest_dir, dst_len,
 180                                                         path + len);
 181                                         modes[count + j] = INDEX;
 182                                 }
 183                                 count += last - first;
 184                         }
 185
 186                         goto next;
 187                 }
 188
 189                 if (!bad && lstat(destination[i], &st) == 0) {
 190                         bad = "destination exists";
 191                         if (force) {
 192                                 /*
 193                                  * only files can overwrite each other:
 194                                  * check both source and destination
 195                                  */
 196                                 if (S_ISREG(st.st_mode)) {
 197                                         fprintf(stderr, "Warning: %s;"
 198                                                         " will overwrite!\n",
 199                                                         bad);
 200                                         bad = NULL;
 201                                         path_list_insert(destination[i],
 202                                                         &overwritten);
 203                                 } else
 204                                         bad = "Cannot overwrite";
 205                         }
 206                 }
 207
 208                 if (!bad &&
 209                     !strncmp(destination[i], source[i], strlen(source[i])))
 210                         bad = "can not move directory into itself";
 211
 212                 if (!bad && cache_name_pos(source[i], strlen(source[i])) < 0)
 213                         bad = "not under version control";
 214
 215                 if (!bad) {
 216                         if (path_list_has_path(&src_for_dst, destination[i]))
 217                                 bad = "multiple sources for the same target";
 218                         else
 219                                 path_list_insert(destination[i], &src_for_dst);
 220                 }
 221
 222 next:
 223                 if (bad) {
 224                         if (ignore_errors) {
 225                                 if (--count > 0) {
 226                                         memmove(source + i, source + i + 1,
 227                                                 (count - i) * sizeof(char *));
 228                                         memmove(destination + i,
 229                                                 destination + i + 1,
 230                                                 (count - i) * sizeof(char *));
 231                                 }
 232                         } else
 233                                 die ("%s, source=%s, destination=%s",
 234                                      bad, source[i], destination[i]);
 235                 }
 236         }
 237
 238         for (i = 0; i < count; i++) {
 239                 if (show_only || verbose)
 240                         printf("Renaming %s to %s\n",
 241                                source[i], destination[i]);
 242                 if (!show_only && modes[i] != INDEX &&
 243                     rename(source[i], destination[i]) < 0 &&
 244                     !ignore_errors)
 245                         die ("renaming %s failed: %s",
 246                              source[i], strerror(errno));
 247
 248                 if (modes[i] == WORKING_DIRECTORY)
 249                         continue;
 250
 251                 if (cache_name_pos(source[i], strlen(source[i])) >= 0) {
 252                         path_list_insert(source[i], &deleted);
 253
 254                         /* destination can be a directory with 1 file inside */
 255                         if (path_list_has_path(&overwritten, destination[i]))
 256                                 path_list_insert(destination[i], &changed);
 257                         else
 258                                 path_list_insert(destination[i], &added);
 259                 } else
 260                         path_list_insert(destination[i], &added);
 261         }
 262
 263         if (show_only) {
 264                 show_list("Changed  : ", &changed);
 265                 show_list("Adding   : ", &added);
 266                 show_list("Deleting : ", &deleted);
 267         } else {
 268                 for (i = 0; i < changed.nr; i++) {
 269                         const char *path = changed.items[i].path;
 270                         int i = cache_name_pos(path, strlen(path));
 271                         struct cache_entry *ce = active_cache[i];
 272
 273                         if (i < 0)
 274                                 die ("Huh? Cache entry for %s unknown?", path);
 275                         refresh_cache_entry(ce, 0);
 276                 }
 277
 278                 for (i = 0; i < added.nr; i++) {
 279                         const char *path = added.items[i].path;
 280                         add_file_to_index(path, verbose);
 281                 }
 282
 283                 for (i = 0; i < deleted.nr; i++) {
 284                         const char *path = deleted.items[i].path;
 285                         remove_file_from_cache(path);
 286                 }
 287
 288                 if (active_cache_changed) {
 289                         if (write_cache(newfd, active_cache, active_nr) ||
 290                             close(newfd) ||
 291                             commit_lock_file(&lock_file))
 292                                 die("Unable to write new index file");
 293                 }
 294         }
 295
 296         return 0;
 297 }