Andrew's git - gitweb.git/blob

449f30aaca93c464af6e2bb947069e59a363932a
   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
  13static const char * const builtin_mv_usage[] = {
  14        "git mv [options] <source>... <destination>",
  15        NULL
  16};
  17
  18static 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                        result[i] = base_name ? strdup(basename(it)) : it;
  33                }
  34        }
  35        return get_pathspec(prefix, result);
  36}
  37
  38static const char *add_slash(const char *path)
  39{
  40        int len = strlen(path);
  41        if (path[len - 1] != '/') {
  42                char *with_slash = xmalloc(len + 2);
  43                memcpy(with_slash, path, len);
  44                with_slash[len++] = '/';
  45                with_slash[len] = 0;
  46                return with_slash;
  47        }
  48        return path;
  49}
  50
  51static struct lock_file lock_file;
  52
  53int cmd_mv(int argc, const char **argv, const char *prefix)
  54{
  55        int i, newfd;
  56        int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
  57        struct option builtin_mv_options[] = {
  58                OPT__VERBOSE(&verbose, "be verbose"),
  59                OPT__DRY_RUN(&show_only, "dry run"),
  60                OPT__FORCE(&force, "force move/rename even if target exists"),
  61                OPT_BOOLEAN('k', NULL, &ignore_errors, "skip move/rename errors"),
  62                OPT_END(),
  63        };
  64        const char **source, **destination, **dest_path;
  65        enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
  66        struct stat st;
  67        struct string_list src_for_dst = STRING_LIST_INIT_NODUP;
  68
  69        git_config(git_default_config, NULL);
  70
  71        argc = parse_options(argc, argv, prefix, builtin_mv_options,
  72                             builtin_mv_usage, 0);
  73        if (--argc < 1)
  74                usage_with_options(builtin_mv_usage, builtin_mv_options);
  75
  76        newfd = hold_locked_index(&lock_file, 1);
  77        if (read_cache() < 0)
  78                die(_("index file corrupt"));
  79
  80        source = copy_pathspec(prefix, argv, argc, 0);
  81        modes = xcalloc(argc, sizeof(enum update_mode));
  82        dest_path = copy_pathspec(prefix, argv + argc, 1, 0);
  83
  84        if (dest_path[0][0] == '\0')
  85                /* special case: "." was normalized to "" */
  86                destination = copy_pathspec(dest_path[0], argv, argc, 1);
  87        else if (!lstat(dest_path[0], &st) &&
  88                        S_ISDIR(st.st_mode)) {
  89                dest_path[0] = add_slash(dest_path[0]);
  90                destination = copy_pathspec(dest_path[0], argv, argc, 1);
  91        } else {
  92                if (argc != 1)
  93                        usage_with_options(builtin_mv_usage, builtin_mv_options);
  94                destination = dest_path;
  95        }
  96
  97        /* Checking */
  98        for (i = 0; i < argc; i++) {
  99                const char *src = source[i], *dst = destination[i];
 100                int length, src_is_dir;
 101                const char *bad = NULL;
 102
 103                if (show_only)
 104                        printf(_("Checking rename of '%s' to '%s'\n"), src, dst);
 105
 106                length = strlen(src);
 107                if (lstat(src, &st) < 0)
 108                        bad = _("bad source");
 109                else if (!strncmp(src, dst, length) &&
 110                                (dst[length] == 0 || dst[length] == '/')) {
 111                        bad = _("can not move directory into itself");
 112                } else if ((src_is_dir = S_ISDIR(st.st_mode))
 113                                && lstat(dst, &st) == 0)
 114                        bad = _("cannot move directory over file");
 115                else if (src_is_dir) {
 116                        const char *src_w_slash = add_slash(src);
 117                        int len_w_slash = length + 1;
 118                        int first, last;
 119
 120                        modes[i] = WORKING_DIRECTORY;
 121
 122                        first = cache_name_pos(src_w_slash, len_w_slash);
 123                        if (first >= 0)
 124                                die (_("Huh? %.*s is in index?"),
 125                                                len_w_slash, src_w_slash);
 126
 127                        first = -1 - first;
 128                        for (last = first; last < active_nr; last++) {
 129                                const char *path = active_cache[last]->name;
 130                                if (strncmp(path, src_w_slash, len_w_slash))
 131                                        break;
 132                        }
 133                        free((char *)src_w_slash);
 134
 135                        if (last - first < 1)
 136                                bad = _("source directory is empty");
 137                        else {
 138                                int j, dst_len;
 139
 140                                if (last - first > 0) {
 141                                        source = xrealloc(source,
 142                                                        (argc + last - first)
 143                                                        * sizeof(char *));
 144                                        destination = xrealloc(destination,
 145                                                        (argc + last - first)
 146                                                        * sizeof(char *));
 147                                        modes = xrealloc(modes,
 148                                                        (argc + last - first)
 149                                                        * sizeof(enum update_mode));
 150                                }
 151
 152                                dst = add_slash(dst);
 153                                dst_len = strlen(dst);
 154
 155                                for (j = 0; j < last - first; j++) {
 156                                        const char *path =
 157                                                active_cache[first + j]->name;
 158                                        source[argc + j] = path;
 159                                        destination[argc + j] =
 160                                                prefix_path(dst, dst_len,
 161                                                        path + length + 1);
 162                                        modes[argc + j] = INDEX;
 163                                }
 164                                argc += last - first;
 165                        }
 166                } else if (cache_name_pos(src, length) < 0)
 167                        bad = _("not under version control");
 168                else if (lstat(dst, &st) == 0) {
 169                        bad = _("destination exists");
 170                        if (force) {
 171                                /*
 172                                 * only files can overwrite each other:
 173                                 * check both source and destination
 174                                 */
 175                                if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
 176                                        warning(_("%s; will overwrite!"), bad);
 177                                        bad = NULL;
 178                                } else
 179                                        bad = _("Cannot overwrite");
 180                        }
 181                } else if (string_list_has_string(&src_for_dst, dst))
 182                        bad = _("multiple sources for the same target");
 183                else
 184                        string_list_insert(&src_for_dst, dst);
 185
 186                if (bad) {
 187                        if (ignore_errors) {
 188                                if (--argc > 0) {
 189                                        memmove(source + i, source + i + 1,
 190                                                (argc - i) * sizeof(char *));
 191                                        memmove(destination + i,
 192                                                destination + i + 1,
 193                                                (argc - i) * sizeof(char *));
 194                                        i--;
 195                                }
 196                        } else
 197                                die (_("%s, source=%s, destination=%s"),
 198                                     bad, src, dst);
 199                }
 200        }
 201
 202        for (i = 0; i < argc; i++) {
 203                const char *src = source[i], *dst = destination[i];
 204                enum update_mode mode = modes[i];
 205                int pos;
 206                if (show_only || verbose)
 207                        printf(_("Renaming %s to %s\n"), src, dst);
 208                if (!show_only && mode != INDEX &&
 209                                rename(src, dst) < 0 && !ignore_errors)
 210                        die_errno (_("renaming '%s' failed"), src);
 211
 212                if (mode == WORKING_DIRECTORY)
 213                        continue;
 214
 215                pos = cache_name_pos(src, strlen(src));
 216                assert(pos >= 0);
 217                if (!show_only)
 218                        rename_cache_entry_at(pos, dst);
 219        }
 220
 221        if (active_cache_changed) {
 222                if (write_cache(newfd, active_cache, active_nr) ||
 223                    commit_locked_index(&lock_file))
 224                        die(_("Unable to write new index file"));
 225        }
 226
 227        return 0;
 228}