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         int i;
  21         const char **result = xmalloc((count + 1) * sizeof(const char *));
  22         memcpy(result, pathspec, count * sizeof(const char *));
  23         result[count] = NULL;
  24         for (i = 0; i < count; i++) {
  25                 int length = strlen(result[i]);
  26                 if (length > 0 && result[i][length - 1] == '/') {
  27                         char *without_slash = xmalloc(length);
  28                         memcpy(without_slash, result[i], length - 1);
  29                         without_slash[length] = '\0';
  30                         result[i] = without_slash;
  31                 }
  32                 if (base_name) {
  33                         const char *last_slash = strrchr(result[i], '/');
  34                         if (last_slash)
  35                                 result[i] = last_slash + 1;
  36                 }
  37         }
  38         return get_pathspec(prefix, result);
  39 }
  40
  41 static void show_list(const char *label, struct path_list *list)
  42 {
  43         if (list->nr > 0) {
  44                 int i;
  45                 printf("%s", label);
  46                 for (i = 0; i < list->nr; i++)
  47                         printf("%s%s", i > 0 ? ", " : "", list->items[i].path);
  48                 putchar('\n');
  49         }
  50 }
  51
  52 static const char *add_slash(const char *path)
  53 {
  54         int len = strlen(path);
  55         if (path[len - 1] != '/') {
  56                 char *with_slash = xmalloc(len + 2);
  57                 memcpy(with_slash, path, len);
  58                 with_slash[len++] = '/';
  59                 with_slash[len] = 0;
  60                 return with_slash;
  61         }
  62         return path;
  63 }
  64
  65 static struct lock_file lock_file;
  66
  67 int cmd_mv(int argc, const char **argv, const char *prefix)
  68 {
  69         int i, newfd, count;
  70         int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
  71         const char **source, **destination, **dest_path;
  72         enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
  73         struct stat st;
  74         struct path_list overwritten = {NULL, 0, 0, 0};
  75         struct path_list src_for_dst = {NULL, 0, 0, 0};
  76         struct path_list added = {NULL, 0, 0, 0};
  77         struct path_list deleted = {NULL, 0, 0, 0};
  78         struct path_list changed = {NULL, 0, 0, 0};
  79
  80         git_config(git_default_config);
  81
  82         newfd = hold_lock_file_for_update(&lock_file, get_index_file(), 1);
  83         if (read_cache() < 0)
  84                 die("index file corrupt");
  85
  86         for (i = 1; i < argc; i++) {
  87                 const char *arg = argv[i];
  88
  89                 if (arg[0] != '-')
  90                         break;
  91                 if (!strcmp(arg, "--")) {
  92                         i++;
  93                         break;
  94                 }
  95                 if (!strcmp(arg, "-n")) {
  96                         show_only = 1;
  97                         continue;
  98                 }
  99                 if (!strcmp(arg, "-f")) {
 100                         force = 1;
 101                         continue;
 102                 }
 103                 if (!strcmp(arg, "-k")) {
 104                         ignore_errors = 1;
 105                         continue;
 106                 }
 107                 usage(builtin_mv_usage);
 108         }
 109         count = argc - i - 1;
 110         if (count < 1)
 111                 usage(builtin_mv_usage);
 112
 113         source = copy_pathspec(prefix, argv + i, count, 0);
 114         modes = xcalloc(count, sizeof(enum update_mode));
 115         dest_path = copy_pathspec(prefix, argv + argc - 1, 1, 0);
 116
 117         if (!lstat(dest_path[0], &st) &&
 118                         S_ISDIR(st.st_mode)) {
 119                 dest_path[0] = add_slash(dest_path[0]);
 120                 destination = copy_pathspec(dest_path[0], argv + i, count, 1);
 121         } else {
 122                 if (count != 1)
 123                         usage(builtin_mv_usage);
 124                 destination = dest_path;
 125         }
 126
 127         /* Checking */
 128         for (i = 0; i < count; i++) {
 129                 int length;
 130                 const char *bad = NULL;
 131
 132                 if (show_only)
 133                         printf("Checking rename of '%s' to '%s'\n",
 134                                 source[i], destination[i]);
 135
 136                 if (lstat(source[i], &st) < 0)
 137                         bad = "bad source";
 138
 139                 if (!bad &&
 140                     (length = strlen(source[i])) >= 0 &&
 141                     !strncmp(destination[i], source[i], length) &&
 142                     (destination[i][length] == 0 || destination[i][length] == '/'))
 143                         bad = "can not move directory into itself";
 144
 145                 if (S_ISDIR(st.st_mode)) {
 146                         const char *dir = source[i], *dest_dir = destination[i];
 147                         int first, last, len = strlen(dir);
 148
 149                         if (lstat(dest_dir, &st) == 0) {
 150                                 bad = "cannot move directory over file";
 151                                 goto next;
 152                         }
 153
 154                         modes[i] = WORKING_DIRECTORY;
 155
 156                         first = cache_name_pos(source[i], len);
 157                         if (first >= 0)
 158                                 die ("Huh? %s/ is in index?", dir);
 159
 160                         first = -1 - first;
 161                         for (last = first; last < active_nr; last++) {
 162                                 const char *path = active_cache[last]->name;
 163                                 if (strncmp(path, dir, len) || path[len] != '/')
 164                                         break;
 165                         }
 166
 167                         if (last - first < 1)
 168                                 bad = "source directory is empty";
 169                         else if (!bad) {
 170                                 int j, dst_len = strlen(dest_dir);
 171
 172                                 if (last - first > 0) {
 173                                         source = realloc(source,
 174                                                         (count + last - first)
 175                                                         * sizeof(char *));
 176                                         destination = realloc(destination,
 177                                                         (count + last - first)
 178                                                         * sizeof(char *));
 179                                         modes = realloc(modes,
 180                                                         (count + last - first)
 181                                                         * sizeof(enum update_mode));
 182                                 }
 183
 184                                 dest_dir = add_slash(dest_dir);
 185
 186                                 for (j = 0; j < last - first; j++) {
 187                                         const char *path =
 188                                                 active_cache[first + j]->name;
 189                                         source[count + j] = path;
 190                                         destination[count + j] =
 191                                                 prefix_path(dest_dir, dst_len,
 192                                                         path + len);
 193                                         modes[count + j] = INDEX;
 194                                 }
 195                                 count += last - first;
 196                         }
 197
 198                         goto next;
 199                 }
 200
 201                 if (!bad && lstat(destination[i], &st) == 0) {
 202                         bad = "destination exists";
 203                         if (force) {
 204                                 /*
 205                                  * only files can overwrite each other:
 206                                  * check both source and destination
 207                                  */
 208                                 if (S_ISREG(st.st_mode)) {
 209                                         fprintf(stderr, "Warning: %s;"
 210                                                         " will overwrite!\n",
 211                                                         bad);
 212                                         bad = NULL;
 213                                         path_list_insert(destination[i],
 214                                                         &overwritten);
 215                                 } else
 216                                         bad = "Cannot overwrite";
 217                         }
 218                 }
 219
 220                 if (!bad && cache_name_pos(source[i], strlen(source[i])) < 0)
 221                         bad = "not under version control";
 222
 223                 if (!bad) {
 224                         if (path_list_has_path(&src_for_dst, destination[i]))
 225                                 bad = "multiple sources for the same target";
 226                         else
 227                                 path_list_insert(destination[i], &src_for_dst);
 228                 }
 229
 230 next:
 231                 if (bad) {
 232                         if (ignore_errors) {
 233                                 if (--count > 0) {
 234                                         memmove(source + i, source + i + 1,
 235                                                 (count - i) * sizeof(char *));
 236                                         memmove(destination + i,
 237                                                 destination + i + 1,
 238                                                 (count - i) * sizeof(char *));
 239                                 }
 240                         } else
 241                                 die ("%s, source=%s, destination=%s",
 242                                      bad, source[i], destination[i]);
 243                 }
 244         }
 245
 246         for (i = 0; i < count; i++) {
 247                 if (show_only || verbose)
 248                         printf("Renaming %s to %s\n",
 249                                source[i], destination[i]);
 250                 if (!show_only && modes[i] != INDEX &&
 251                     rename(source[i], destination[i]) < 0 &&
 252                     !ignore_errors)
 253                         die ("renaming %s failed: %s",
 254                              source[i], strerror(errno));
 255
 256                 if (modes[i] == WORKING_DIRECTORY)
 257                         continue;
 258
 259                 if (cache_name_pos(source[i], strlen(source[i])) >= 0) {
 260                         path_list_insert(source[i], &deleted);
 261
 262                         /* destination can be a directory with 1 file inside */
 263                         if (path_list_has_path(&overwritten, destination[i]))
 264                                 path_list_insert(destination[i], &changed);
 265                         else
 266                                 path_list_insert(destination[i], &added);
 267                 } else
 268                         path_list_insert(destination[i], &added);
 269         }
 270
 271         if (show_only) {
 272                 show_list("Changed  : ", &changed);
 273                 show_list("Adding   : ", &added);
 274                 show_list("Deleting : ", &deleted);
 275         } else {
 276                 for (i = 0; i < changed.nr; i++) {
 277                         const char *path = changed.items[i].path;
 278                         int i = cache_name_pos(path, strlen(path));
 279                         struct cache_entry *ce = active_cache[i];
 280
 281                         if (i < 0)
 282                                 die ("Huh? Cache entry for %s unknown?", path);
 283                         refresh_cache_entry(ce, 0);
 284                 }
 285
 286                 for (i = 0; i < added.nr; i++) {
 287                         const char *path = added.items[i].path;
 288                         add_file_to_index(path, verbose);
 289                 }
 290
 291                 for (i = 0; i < deleted.nr; i++) {
 292                         const char *path = deleted.items[i].path;
 293                         remove_file_from_cache(path);
 294                 }
 295
 296                 if (active_cache_changed) {
 297                         if (write_cache(newfd, active_cache, active_nr) ||
 298                             close(newfd) ||
 299                             commit_lock_file(&lock_file))
 300                                 die("Unable to write new index file");
 301                 }
 302         }
 303
 304         return 0;
 305 }