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