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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 #include "submodule.h"
  13
  14 static const char * const builtin_mv_usage[] = {
  15         N_("git mv [options] <source>... <destination>"),
  16         NULL
  17 };
  18
  19 #define DUP_BASENAME 1
  20 #define KEEP_TRAILING_SLASH 2
  21
  22 static const char **internal_copy_pathspec(const char *prefix,
  23                                            const char **pathspec,
  24                                            int count, unsigned flags)
  25 {
  26         int i;
  27         const char **result = xmalloc((count + 1) * sizeof(const char *));
  28         memcpy(result, pathspec, count * sizeof(const char *));
  29         result[count] = NULL;
  30         for (i = 0; i < count; i++) {
  31                 int length = strlen(result[i]);
  32                 int to_copy = length;
  33                 while (!(flags & KEEP_TRAILING_SLASH) &&
  34                        to_copy > 0 && is_dir_sep(result[i][to_copy - 1]))
  35                         to_copy--;
  36                 if (to_copy != length || flags & DUP_BASENAME) {
  37                         char *it = xmemdupz(result[i], to_copy);
  38                         if (flags & DUP_BASENAME) {
  39                                 result[i] = xstrdup(basename(it));
  40                                 free(it);
  41                         } else
  42                                 result[i] = it;
  43                 }
  44         }
  45         return get_pathspec(prefix, result);
  46 }
  47
  48 static const char *add_slash(const char *path)
  49 {
  50         int len = strlen(path);
  51         if (path[len - 1] != '/') {
  52                 char *with_slash = xmalloc(len + 2);
  53                 memcpy(with_slash, path, len);
  54                 with_slash[len++] = '/';
  55                 with_slash[len] = 0;
  56                 return with_slash;
  57         }
  58         return path;
  59 }
  60
  61 static struct lock_file lock_file;
  62 #define SUBMODULE_WITH_GITDIR ((const char *)1)
  63
  64 int cmd_mv(int argc, const char **argv, const char *prefix)
  65 {
  66         int i, newfd, gitmodules_modified = 0;
  67         int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
  68         struct option builtin_mv_options[] = {
  69                 OPT__VERBOSE(&verbose, N_("be verbose")),
  70                 OPT__DRY_RUN(&show_only, N_("dry run")),
  71                 OPT__FORCE(&force, N_("force move/rename even if target exists")),
  72                 OPT_BOOL('k', NULL, &ignore_errors, N_("skip move/rename errors")),
  73                 OPT_END(),
  74         };
  75         const char **source, **destination, **dest_path, **submodule_gitfile;
  76         enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
  77         struct stat st;
  78         struct string_list src_for_dst = STRING_LIST_INIT_NODUP;
  79
  80         gitmodules_config();
  81         git_config(git_default_config, NULL);
  82
  83         argc = parse_options(argc, argv, prefix, builtin_mv_options,
  84                              builtin_mv_usage, 0);
  85         if (--argc < 1)
  86                 usage_with_options(builtin_mv_usage, builtin_mv_options);
  87
  88         newfd = hold_locked_index(&lock_file, 1);
  89         if (read_cache() < 0)
  90                 die(_("index file corrupt"));
  91
  92         source = internal_copy_pathspec(prefix, argv, argc, 0);
  93         modes = xcalloc(argc, sizeof(enum update_mode));
  94         /*
  95          * Keep trailing slash, needed to let
  96          * "git mv file no-such-dir/" error out.
  97          */
  98         dest_path = internal_copy_pathspec(prefix, argv + argc, 1,
  99                                            KEEP_TRAILING_SLASH);
 100         submodule_gitfile = xcalloc(argc, sizeof(char *));
 101
 102         if (dest_path[0][0] == '\0')
 103                 /* special case: "." was normalized to "" */
 104                 destination = internal_copy_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
 105         else if (!lstat(dest_path[0], &st) &&
 106                         S_ISDIR(st.st_mode)) {
 107                 dest_path[0] = add_slash(dest_path[0]);
 108                 destination = internal_copy_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
 109         } else {
 110                 if (argc != 1)
 111                         die("destination '%s' is not a directory", dest_path[0]);
 112                 destination = dest_path;
 113         }
 114
 115         /* Checking */
 116         for (i = 0; i < argc; i++) {
 117                 const char *src = source[i], *dst = destination[i];
 118                 int length, src_is_dir;
 119                 const char *bad = NULL;
 120
 121                 if (show_only)
 122                         printf(_("Checking rename of '%s' to '%s'\n"), src, dst);
 123
 124                 length = strlen(src);
 125                 if (lstat(src, &st) < 0)
 126                         bad = _("bad source");
 127                 else if (!strncmp(src, dst, length) &&
 128                                 (dst[length] == 0 || dst[length] == '/')) {
 129                         bad = _("can not move directory into itself");
 130                 } else if ((src_is_dir = S_ISDIR(st.st_mode))
 131                                 && lstat(dst, &st) == 0)
 132                         bad = _("cannot move directory over file");
 133                 else if (src_is_dir) {
 134                         int first = cache_name_pos(src, length);
 135                         if (first >= 0) {
 136                                 struct strbuf submodule_dotgit = STRBUF_INIT;
 137                                 if (!S_ISGITLINK(active_cache[first]->ce_mode))
 138                                         die (_("Huh? Directory %s is in index and no submodule?"), src);
 139                                 if (!is_staging_gitmodules_ok())
 140                                         die (_("Please, stage your changes to .gitmodules or stash them to proceed"));
 141                                 strbuf_addf(&submodule_dotgit, "%s/.git", src);
 142                                 submodule_gitfile[i] = read_gitfile(submodule_dotgit.buf);
 143                                 if (submodule_gitfile[i])
 144                                         submodule_gitfile[i] = xstrdup(submodule_gitfile[i]);
 145                                 else
 146                                         submodule_gitfile[i] = SUBMODULE_WITH_GITDIR;
 147                                 strbuf_release(&submodule_dotgit);
 148                         } else {
 149                                 const char *src_w_slash = add_slash(src);
 150                                 int last, len_w_slash = length + 1;
 151
 152                                 modes[i] = WORKING_DIRECTORY;
 153
 154                                 first = cache_name_pos(src_w_slash, len_w_slash);
 155                                 if (first >= 0)
 156                                         die (_("Huh? %.*s is in index?"),
 157                                                         len_w_slash, src_w_slash);
 158
 159                                 first = -1 - first;
 160                                 for (last = first; last < active_nr; last++) {
 161                                         const char *path = active_cache[last]->name;
 162                                         if (strncmp(path, src_w_slash, len_w_slash))
 163                                                 break;
 164                                 }
 165                                 free((char *)src_w_slash);
 166
 167                                 if (last - first < 1)
 168                                         bad = _("source directory is empty");
 169                                 else {
 170                                         int j, dst_len;
 171
 172                                         if (last - first > 0) {
 173                                                 source = xrealloc(source,
 174                                                                 (argc + last - first)
 175                                                                 * sizeof(char *));
 176                                                 destination = xrealloc(destination,
 177                                                                 (argc + last - first)
 178                                                                 * sizeof(char *));
 179                                                 modes = xrealloc(modes,
 180                                                                 (argc + last - first)
 181                                                                 * sizeof(enum update_mode));
 182                                         }
 183
 184                                         dst = add_slash(dst);
 185                                         dst_len = strlen(dst);
 186
 187                                         for (j = 0; j < last - first; j++) {
 188                                                 const char *path =
 189                                                         active_cache[first + j]->name;
 190                                                 source[argc + j] = path;
 191                                                 destination[argc + j] =
 192                                                         prefix_path(dst, dst_len,
 193                                                                 path + length + 1);
 194                                                 modes[argc + j] = INDEX;
 195                                         }
 196                                         argc += last - first;
 197                                 }
 198                         }
 199                 } else if (cache_name_pos(src, length) < 0)
 200                         bad = _("not under version control");
 201                 else if (lstat(dst, &st) == 0) {
 202                         bad = _("destination exists");
 203                         if (force) {
 204                                 /*
 205                                  * only files can overwrite each other:
 206                                  * check both source and destination
 207                                  */
 208                                 if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
 209                                         if (verbose)
 210                                                 warning(_("overwriting '%s'"), dst);
 211                                         bad = NULL;
 212                                 } else
 213                                         bad = _("Cannot overwrite");
 214                         }
 215                 } else if (string_list_has_string(&src_for_dst, dst))
 216                         bad = _("multiple sources for the same target");
 217                 else if (is_dir_sep(dst[strlen(dst) - 1]))
 218                         bad = _("destination directory does not exist");
 219                 else
 220                         string_list_insert(&src_for_dst, dst);
 221
 222                 if (bad) {
 223                         if (ignore_errors) {
 224                                 if (--argc > 0) {
 225                                         memmove(source + i, source + i + 1,
 226                                                 (argc - i) * sizeof(char *));
 227                                         memmove(destination + i,
 228                                                 destination + i + 1,
 229                                                 (argc - i) * sizeof(char *));
 230                                         i--;
 231                                 }
 232                         } else
 233                                 die (_("%s, source=%s, destination=%s"),
 234                                      bad, src, dst);
 235                 }
 236         }
 237
 238         for (i = 0; i < argc; i++) {
 239                 const char *src = source[i], *dst = destination[i];
 240                 enum update_mode mode = modes[i];
 241                 int pos;
 242                 if (show_only || verbose)
 243                         printf(_("Renaming %s to %s\n"), src, dst);
 244                 if (!show_only && mode != INDEX) {
 245                         if (rename(src, dst) < 0 && !ignore_errors)
 246                                 die_errno (_("renaming '%s' failed"), src);
 247                         if (submodule_gitfile[i]) {
 248                                 if (submodule_gitfile[i] != SUBMODULE_WITH_GITDIR)
 249                                         connect_work_tree_and_git_dir(dst, submodule_gitfile[i]);
 250                                 if (!update_path_in_gitmodules(src, dst))
 251                                         gitmodules_modified = 1;
 252                         }
 253                 }
 254
 255                 if (mode == WORKING_DIRECTORY)
 256                         continue;
 257
 258                 pos = cache_name_pos(src, strlen(src));
 259                 assert(pos >= 0);
 260                 if (!show_only)
 261                         rename_cache_entry_at(pos, dst);
 262         }
 263
 264         if (gitmodules_modified)
 265                 stage_updated_gitmodules();
 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         return 0;
 274 }