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