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         const char **result = xmalloc((count + 1) * sizeof(const char *));
  21         memcpy(result, pathspec, count * sizeof(const char *));
  22         result[count] = NULL;
  23         if (base_name) {
  24                 int i;
  25                 for (i = 0; i < count; i++) {
  26                         const char *last_slash = strrchr(result[i], '/');
  27                         if (last_slash)
  28                                 result[i] = last_slash + 1;
  29                 }
  30         }
  31         return get_pathspec(prefix, result);
  32 }
  33
  34 static void show_list(const char *label, struct path_list *list)
  35 {
  36         if (list->nr > 0) {
  37                 int i;
  38                 printf("%s", label);
  39                 for (i = 0; i < list->nr; i++)
  40                         printf("%s%s", i > 0 ? ", " : "", list->items[i].path);
  41                 putchar('\n');
  42         }
  43 }
  44
  45 static struct lock_file lock_file;
  46
  47 int cmd_mv(int argc, const char **argv, char **envp)
  48 {
  49         int i, newfd, count;
  50         int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
  51         const char *prefix = setup_git_directory();
  52         const char **source, **destination, **dest_path;
  53         struct stat st;
  54         struct path_list overwritten = {NULL, 0, 0, 0};
  55         struct path_list src_for_dst = {NULL, 0, 0, 0};
  56         struct path_list added = {NULL, 0, 0, 0};
  57         struct path_list deleted = {NULL, 0, 0, 0};
  58         struct path_list changed = {NULL, 0, 0, 0};
  59
  60         git_config(git_default_config);
  61
  62         newfd = hold_lock_file_for_update(&lock_file, get_index_file());
  63         if (newfd < 0)
  64                 die("unable to create new index file");
  65
  66         if (read_cache() < 0)
  67                 die("index file corrupt");
  68
  69         for (i = 1; i < argc; i++) {
  70                 const char *arg = argv[i];
  71
  72                 if (arg[0] != '-')
  73                         break;
  74                 if (!strcmp(arg, "--")) {
  75                         i++;
  76                         break;
  77                 }
  78                 if (!strcmp(arg, "-n")) {
  79                         show_only = 1;
  80                         continue;
  81                 }
  82                 if (!strcmp(arg, "-f")) {
  83                         force = 1;
  84                         continue;
  85                 }
  86                 if (!strcmp(arg, "-k")) {
  87                         ignore_errors = 1;
  88                         continue;
  89                 }
  90                 die(builtin_mv_usage);
  91         }
  92         count = argc - i - 1;
  93         if (count < 1)
  94                 usage(builtin_mv_usage);
  95
  96         source = copy_pathspec(prefix, argv + i, count, 0);
  97         dest_path = copy_pathspec(prefix, argv + argc - 1, 1, 0);
  98
  99         if (!lstat(dest_path[0], &st) && S_ISDIR(st.st_mode))
 100                 destination = copy_pathspec(dest_path[0], argv + i, count, 1);
 101         else {
 102                 if (count != 1)
 103                         usage(builtin_mv_usage);
 104                 destination = dest_path;
 105         }
 106
 107         /* Checking */
 108         for (i = 0; i < count; i++) {
 109                 const char *bad = NULL;
 110
 111                 if (show_only)
 112                         printf("Checking rename of '%s' to '%s'\n",
 113                                 source[i], destination[i]);
 114
 115                 if (lstat(source[i], &st) < 0)
 116                         bad = "bad source";
 117                 else if (lstat(destination[i], &st) == 0) {
 118                         bad = "destination exists";
 119                         if (force) {
 120                                 /*
 121                                  * only files can overwrite each other:
 122                                  * check both source and destination
 123                                  */
 124                                 if (S_ISREG(st.st_mode)) {
 125                                         fprintf(stderr, "Warning: %s;"
 126                                                         " will overwrite!\n",
 127                                                         bad);
 128                                         bad = NULL;
 129                                         path_list_insert(destination[i],
 130                                                         &overwritten);
 131                                 } else
 132                                         bad = "Cannot overwrite";
 133                         }
 134                 }
 135
 136                 if (!bad &&
 137                     !strncmp(destination[i], source[i], strlen(source[i])))
 138                         bad = "can not move directory into itself";
 139
 140                 if (!bad && cache_name_pos(source[i], strlen(source[i])) < 0)
 141                         bad = "not under version control";
 142
 143                 if (!bad) {
 144                         if (path_list_has_path(&src_for_dst, destination[i]))
 145                                 bad = "multiple sources for the same target";
 146                         else
 147                                 path_list_insert(destination[i], &src_for_dst);
 148                 }
 149
 150                 if (bad) {
 151                         if (ignore_errors) {
 152                                 if (--count > 0) {
 153                                         memmove(source + i, source + i + 1,
 154                                                 (count - i) * sizeof(char *));
 155                                         memmove(destination + i,
 156                                                 destination + i + 1,
 157                                                 (count - i) * sizeof(char *));
 158                                 }
 159                         } else
 160                                 die ("Error: %s, source=%s, destination=%s",
 161                                      bad, source[i], destination[i]);
 162                 }
 163         }
 164
 165         for (i = 0; i < count; i++) {
 166                 if (show_only || verbose)
 167                         printf("Renaming %s to %s\n",
 168                                source[i], destination[i]);
 169                 if (!show_only &&
 170                     rename(source[i], destination[i]) < 0 &&
 171                     !ignore_errors)
 172                         die ("renaming %s failed: %s",
 173                              source[i], strerror(errno));
 174
 175                 if (cache_name_pos(source[i], strlen(source[i])) >= 0) {
 176                         path_list_insert(source[i], &deleted);
 177
 178                         /* destination can be a directory with 1 file inside */
 179                         if (path_list_has_path(&overwritten, destination[i]))
 180                                 path_list_insert(destination[i], &changed);
 181                         else
 182                                 path_list_insert(destination[i], &added);
 183                 } else
 184                         path_list_insert(destination[i], &added);
 185         }
 186
 187         if (show_only) {
 188                 show_list("Changed  : ", &changed);
 189                 show_list("Adding   : ", &added);
 190                 show_list("Deleting : ", &deleted);
 191         } else {
 192                 for (i = 0; i < changed.nr; i++) {
 193                         const char *path = changed.items[i].path;
 194                         int i = cache_name_pos(path, strlen(path));
 195                         struct cache_entry *ce = active_cache[i];
 196
 197                         if (i < 0)
 198                                 die ("Huh? Cache entry for %s unknown?", path);
 199                         refresh_cache_entry(ce, 0);
 200                 }
 201
 202                 for (i = 0; i < added.nr; i++) {
 203                         const char *path = added.items[i].path;
 204                         add_file_to_index(path, verbose);
 205                 }
 206
 207                 for (i = 0; i < deleted.nr; i++) {
 208                         const char *path = deleted.items[i].path;
 209                         remove_file_from_cache(path);
 210                 }
 211
 212                 if (active_cache_changed) {
 213                         if (write_cache(newfd, active_cache, active_nr) ||
 214                             close(newfd) ||
 215                             commit_lock_file(&lock_file))
 216                                 die("Unable to write new index file");
 217                 }
 218         }
 219
 220         return 0;
 221 }