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 - 1] = '\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 (dest_path[0][0] == '\0')
 118                 /* special case: "." was normalized to "" */
 119                 destination = copy_pathspec(dest_path[0], argv + i, count, 1);
 120         else if (!lstat(dest_path[0], &st) &&
 121                         S_ISDIR(st.st_mode)) {
 122                 dest_path[0] = add_slash(dest_path[0]);
 123                 destination = copy_pathspec(dest_path[0], argv + i, count, 1);
 124         } else {
 125                 if (count != 1)
 126                         usage(builtin_mv_usage);
 127                 destination = dest_path;
 128         }
 129
 130         /* Checking */
 131         for (i = 0; i < count; i++) {
 132                 const char *src = source[i], *dst = destination[i];
 133                 int length, src_is_dir;
 134                 const char *bad = NULL;
 135
 136                 if (show_only)
 137                         printf("Checking rename of '%s' to '%s'\n", src, dst);
 138
 139                 length = strlen(src);
 140                 if (lstat(src, &st) < 0)
 141                         bad = "bad source";
 142                 else if (!strncmp(src, dst, length) &&
 143                                 (dst[length] == 0 || dst[length] == '/')) {
 144                         bad = "can not move directory into itself";
 145                 } else if ((src_is_dir = S_ISDIR(st.st_mode))
 146                                 && lstat(dst, &st) == 0)
 147                         bad = "cannot move directory over file";
 148                 else if (src_is_dir) {
 149                         const char *src_w_slash = add_slash(src);
 150                         int len_w_slash = length + 1;
 151                         int first, last;
 152
 153                         modes[i] = WORKING_DIRECTORY;
 154
 155                         first = cache_name_pos(src_w_slash, len_w_slash);
 156                         if (first >= 0)
 157                                 die ("Huh? %.*s is in index?",
 158                                                 len_w_slash, src_w_slash);
 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, src_w_slash, len_w_slash))
 164                                         break;
 165                         }
 166                         free((char *)src_w_slash);
 167
 168                         if (last - first < 1)
 169                                 bad = "source directory is empty";
 170                         else {
 171                                 int j, dst_len;
 172
 173                                 if (last - first > 0) {
 174                                         source = xrealloc(source,
 175                                                         (count + last - first)
 176                                                         * sizeof(char *));
 177                                         destination = xrealloc(destination,
 178                                                         (count + last - first)
 179                                                         * sizeof(char *));
 180                                         modes = xrealloc(modes,
 181                                                         (count + last - first)
 182                                                         * sizeof(enum update_mode));
 183                                 }
 184
 185                                 dst = add_slash(dst);
 186                                 dst_len = strlen(dst) - 1;
 187
 188                                 for (j = 0; j < last - first; j++) {
 189                                         const char *path =
 190                                                 active_cache[first + j]->name;
 191                                         source[count + j] = path;
 192                                         destination[count + j] =
 193                                                 prefix_path(dst, dst_len,
 194                                                         path + length);
 195                                         modes[count + j] = INDEX;
 196                                 }
 197                                 count += last - first;
 198                         }
 199                 } else if (lstat(dst, &st) == 0) {
 200                         bad = "destination exists";
 201                         if (force) {
 202                                 /*
 203                                  * only files can overwrite each other:
 204                                  * check both source and destination
 205                                  */
 206                                 if (S_ISREG(st.st_mode)) {
 207                                         fprintf(stderr, "Warning: %s;"
 208                                                         " will overwrite!\n",
 209                                                         bad);
 210                                         bad = NULL;
 211                                         path_list_insert(dst, &overwritten);
 212                                 } else
 213                                         bad = "Cannot overwrite";
 214                         }
 215                 } else if (cache_name_pos(src, length) < 0)
 216                         bad = "not under version control";
 217                 else if (path_list_has_path(&src_for_dst, dst))
 218                         bad = "multiple sources for the same target";
 219                 else
 220                         path_list_insert(dst, &src_for_dst);
 221
 222                 if (bad) {
 223                         if (ignore_errors) {
 224                                 if (--count > 0) {
 225                                         memmove(source + i, source + i + 1,
 226                                                 (count - i) * sizeof(char *));
 227                                         memmove(destination + i,
 228                                                 destination + i + 1,
 229                                                 (count - i) * sizeof(char *));
 230                                 }
 231                         } else
 232                                 die ("%s, source=%s, destination=%s",
 233                                      bad, src, dst);
 234                 }
 235         }
 236
 237         for (i = 0; i < count; i++) {
 238                 const char *src = source[i], *dst = destination[i];
 239                 enum update_mode mode = modes[i];
 240                 if (show_only || verbose)
 241                         printf("Renaming %s to %s\n", src, dst);
 242                 if (!show_only && mode != INDEX &&
 243                                 rename(src, dst) < 0 && !ignore_errors)
 244                         die ("renaming %s failed: %s", src, strerror(errno));
 245
 246                 if (mode == WORKING_DIRECTORY)
 247                         continue;
 248
 249                 if (cache_name_pos(src, strlen(src)) >= 0) {
 250                         path_list_insert(src, &deleted);
 251
 252                         /* destination can be a directory with 1 file inside */
 253                         if (path_list_has_path(&overwritten, dst))
 254                                 path_list_insert(dst, &changed);
 255                         else
 256                                 path_list_insert(dst, &added);
 257                 } else
 258                         path_list_insert(dst, &added);
 259         }
 260
 261         if (show_only) {
 262                 show_list("Changed  : ", &changed);
 263                 show_list("Adding   : ", &added);
 264                 show_list("Deleting : ", &deleted);
 265         } else {
 266                 for (i = 0; i < changed.nr; i++) {
 267                         const char *path = changed.items[i].path;
 268                         int j = cache_name_pos(path, strlen(path));
 269                         struct cache_entry *ce = active_cache[j];
 270
 271                         if (j < 0)
 272                                 die ("Huh? Cache entry for %s unknown?", path);
 273                         refresh_cache_entry(ce, 0);
 274                 }
 275
 276                 for (i = 0; i < added.nr; i++) {
 277                         const char *path = added.items[i].path;
 278                         add_file_to_index(path, verbose);
 279                 }
 280
 281                 for (i = 0; i < deleted.nr; i++) {
 282                         const char *path = deleted.items[i].path;
 283                         remove_file_from_cache(path);
 284                         cache_tree_invalidate_path(active_cache_tree, path);
 285                 }
 286
 287                 if (active_cache_changed) {
 288                         if (write_cache(newfd, active_cache, active_nr) ||
 289                             close(newfd) ||
 290                             commit_lock_file(&lock_file))
 291                                 die("Unable to write new index file");
 292                 }
 293         }
 294
 295         return 0;
 296 }