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