builtin-mv.c

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