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   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                 int to_copy = length;
  28                 while (to_copy > 0 && is_dir_sep(result[i][to_copy - 1]))
  29                         to_copy--;
  30                 if (to_copy != length || base_name) {
  31                         char *it = xmemdupz(result[i], to_copy);
  32                         if (base_name) {
  33                                 result[i] = xstrdup(basename(it));
  34                                 free(it);
  35                         } else
  36                                 result[i] = it;
  37                 }
  38         }
  39         return get_pathspec(prefix, result);
  40 }
  41
  42 static const char *add_slash(const char *path)
  43 {
  44         int len = strlen(path);
  45         if (path[len - 1] != '/') {
  46                 char *with_slash = xmalloc(len + 2);
  47                 memcpy(with_slash, path, len);
  48                 with_slash[len++] = '/';
  49                 with_slash[len] = 0;
  50                 return with_slash;
  51         }
  52         return path;
  53 }
  54
  55 static struct lock_file lock_file;
  56
  57 int cmd_mv(int argc, const char **argv, const char *prefix)
  58 {
  59         int i, newfd;
  60         int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
  61         struct option builtin_mv_options[] = {
  62                 OPT__VERBOSE(&verbose, "be verbose"),
  63                 OPT__DRY_RUN(&show_only, "dry run"),
  64                 OPT__FORCE(&force, "force move/rename even if target exists"),
  65                 OPT_BOOLEAN('k', NULL, &ignore_errors, "skip move/rename errors"),
  66                 OPT_END(),
  67         };
  68         const char **source, **destination, **dest_path;
  69         enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
  70         struct stat st;
  71         struct string_list src_for_dst = STRING_LIST_INIT_NODUP;
  72
  73         git_config(git_default_config, NULL);
  74
  75         argc = parse_options(argc, argv, prefix, builtin_mv_options,
  76                              builtin_mv_usage, 0);
  77         if (--argc < 1)
  78                 usage_with_options(builtin_mv_usage, builtin_mv_options);
  79
  80         newfd = hold_locked_index(&lock_file, 1);
  81         if (read_cache() < 0)
  82                 die(_("index file corrupt"));
  83
  84         source = copy_pathspec(prefix, argv, argc, 0);
  85         modes = xcalloc(argc, sizeof(enum update_mode));
  86         dest_path = copy_pathspec(prefix, argv + argc, 1, 0);
  87
  88         if (dest_path[0][0] == '\0')
  89                 /* special case: "." was normalized to "" */
  90                 destination = copy_pathspec(dest_path[0], argv, argc, 1);
  91         else if (!lstat(dest_path[0], &st) &&
  92                         S_ISDIR(st.st_mode)) {
  93                 dest_path[0] = add_slash(dest_path[0]);
  94                 destination = copy_pathspec(dest_path[0], argv, argc, 1);
  95         } else {
  96                 if (argc != 1)
  97                         die("destination '%s' is not a directory", dest_path[0]);
  98                 destination = dest_path;
  99         }
 100
 101         /* Checking */
 102         for (i = 0; i < argc; i++) {
 103                 const char *src = source[i], *dst = destination[i];
 104                 int length, src_is_dir;
 105                 const char *bad = NULL;
 106
 107                 if (show_only)
 108                         printf(_("Checking rename of '%s' to '%s'\n"), src, dst);
 109
 110                 length = strlen(src);
 111                 if (lstat(src, &st) < 0)
 112                         bad = _("bad source");
 113                 else if (!strncmp(src, dst, length) &&
 114                                 (dst[length] == 0 || dst[length] == '/')) {
 115                         bad = _("can not move directory into itself");
 116                 } else if ((src_is_dir = S_ISDIR(st.st_mode))
 117                                 && lstat(dst, &st) == 0)
 118                         bad = _("cannot move directory over file");
 119                 else if (src_is_dir) {
 120                         const char *src_w_slash = add_slash(src);
 121                         int len_w_slash = length + 1;
 122                         int first, last;
 123
 124                         modes[i] = WORKING_DIRECTORY;
 125
 126                         first = cache_name_pos(src_w_slash, len_w_slash);
 127                         if (first >= 0)
 128                                 die (_("Huh? %.*s is in index?"),
 129                                                 len_w_slash, src_w_slash);
 130
 131                         first = -1 - first;
 132                         for (last = first; last < active_nr; last++) {
 133                                 const char *path = active_cache[last]->name;
 134                                 if (strncmp(path, src_w_slash, len_w_slash))
 135                                         break;
 136                         }
 137                         free((char *)src_w_slash);
 138
 139                         if (last - first < 1)
 140                                 bad = _("source directory is empty");
 141                         else {
 142                                 int j, dst_len;
 143
 144                                 if (last - first > 0) {
 145                                         source = xrealloc(source,
 146                                                         (argc + last - first)
 147                                                         * sizeof(char *));
 148                                         destination = xrealloc(destination,
 149                                                         (argc + last - first)
 150                                                         * sizeof(char *));
 151                                         modes = xrealloc(modes,
 152                                                         (argc + last - first)
 153                                                         * sizeof(enum update_mode));
 154                                 }
 155
 156                                 dst = add_slash(dst);
 157                                 dst_len = strlen(dst);
 158
 159                                 for (j = 0; j < last - first; j++) {
 160                                         const char *path =
 161                                                 active_cache[first + j]->name;
 162                                         source[argc + j] = path;
 163                                         destination[argc + j] =
 164                                                 prefix_path(dst, dst_len,
 165                                                         path + length + 1);
 166                                         modes[argc + j] = INDEX;
 167                                 }
 168                                 argc += last - first;
 169                         }
 170                 } else if (cache_name_pos(src, length) < 0)
 171                         bad = _("not under version control");
 172                 else if (lstat(dst, &st) == 0) {
 173                         bad = _("destination exists");
 174                         if (force) {
 175                                 /*
 176                                  * only files can overwrite each other:
 177                                  * check both source and destination
 178                                  */
 179                                 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
 180                                         if (verbose)
 181                                                 warning(_("overwriting '%s'"), dst);
 182                                         bad = NULL;
 183                                 } else
 184                                         bad = _("Cannot overwrite");
 185                         }
 186                 } else if (string_list_has_string(&src_for_dst, dst))
 187                         bad = _("multiple sources for the same target");
 188                 else
 189                         string_list_insert(&src_for_dst, dst);
 190
 191                 if (bad) {
 192                         if (ignore_errors) {
 193                                 if (--argc > 0) {
 194                                         memmove(source + i, source + i + 1,
 195                                                 (argc - i) * sizeof(char *));
 196                                         memmove(destination + i,
 197                                                 destination + i + 1,
 198                                                 (argc - i) * sizeof(char *));
 199                                         i--;
 200                                 }
 201                         } else
 202                                 die (_("%s, source=%s, destination=%s"),
 203                                      bad, src, dst);
 204                 }
 205         }
 206
 207         for (i = 0; i < argc; i++) {
 208                 const char *src = source[i], *dst = destination[i];
 209                 enum update_mode mode = modes[i];
 210                 int pos;
 211                 if (show_only || verbose)
 212                         printf(_("Renaming %s to %s\n"), src, dst);
 213                 if (!show_only && mode != INDEX &&
 214                                 rename(src, dst) < 0 && !ignore_errors)
 215                         die_errno (_("renaming '%s' failed"), src);
 216
 217                 if (mode == WORKING_DIRECTORY)
 218                         continue;
 219
 220                 pos = cache_name_pos(src, strlen(src));
 221                 assert(pos >= 0);
 222                 if (!show_only)
 223                         rename_cache_entry_at(pos, dst);
 224         }
 225
 226         if (active_cache_changed) {
 227                 if (write_cache(newfd, active_cache, active_nr) ||
 228                     commit_locked_index(&lock_file))
 229                         die(_("Unable to write new index file"));
 230         }
 231
 232         return 0;
 233 }