Andrew's git / gitweb.git / builtin-mv.c
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builtin-mv.con commit Reduce the number of connects when fetching (ba22785)
   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 "path-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                if (length > 0 && result[i][length - 1] == '/') {
  28                        result[i] = xmemdupz(result[i], length - 1);
  29                }
  30                if (base_name) {
  31                        const char *last_slash = strrchr(result[i], '/');
  32                        if (last_slash)
  33                                result[i] = last_slash + 1;
  34                }
  35        }
  36        return get_pathspec(prefix, result);
  37}
  38
  39static void show_list(const char *label, struct path_list *list)
  40{
  41        if (list->nr > 0) {
  42                int i;
  43                printf("%s", label);
  44                for (i = 0; i < list->nr; i++)
  45                        printf("%s%s", i > 0 ? ", " : "", list->items[i].path);
  46                putchar('\n');
  47        }
  48}
  49
  50static const char *add_slash(const char *path)
  51{
  52        int len = strlen(path);
  53        if (path[len - 1] != '/') {
  54                char *with_slash = xmalloc(len + 2);
  55                memcpy(with_slash, path, len);
  56                with_slash[len++] = '/';
  57                with_slash[len] = 0;
  58                return with_slash;
  59        }
  60        return path;
  61}
  62
  63static struct lock_file lock_file;
  64
  65int cmd_mv(int argc, const char **argv, const char *prefix)
  66{
  67        int i, newfd;
  68        int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
  69        struct option builtin_mv_options[] = {
  70                OPT__DRY_RUN(&show_only),
  71                OPT_BOOLEAN('f', NULL, &force, "force move/rename even if target exists"),
  72                OPT_BOOLEAN('k', NULL, &ignore_errors, "skip move/rename errors"),
  73                OPT_END(),
  74        };
  75        const char **source, **destination, **dest_path;
  76        enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
  77        struct stat st;
  78        struct path_list overwritten = {NULL, 0, 0, 0};
  79        struct path_list src_for_dst = {NULL, 0, 0, 0};
  80        struct path_list added = {NULL, 0, 0, 0};
  81        struct path_list deleted = {NULL, 0, 0, 0};
  82        struct path_list changed = {NULL, 0, 0, 0};
  83
  84        git_config(git_default_config);
  85
  86        newfd = hold_locked_index(&lock_file, 1);
  87        if (read_cache() < 0)
  88                die("index file corrupt");
  89
  90        argc = parse_options(argc, argv, builtin_mv_options, builtin_mv_usage, 0);
  91        if (--argc < 1)
  92                usage_with_options(builtin_mv_usage, builtin_mv_options);
  93
  94        source = copy_pathspec(prefix, argv, argc, 0);
  95        modes = xcalloc(argc, sizeof(enum update_mode));
  96        dest_path = copy_pathspec(prefix, argv + argc, 1, 0);
  97
  98        if (dest_path[0][0] == '\0')
  99                /* special case: "." was normalized to "" */
 100                destination = copy_pathspec(dest_path[0], argv, argc, 1);
 101        else if (!lstat(dest_path[0], &st) &&
 102                        S_ISDIR(st.st_mode)) {
 103                dest_path[0] = add_slash(dest_path[0]);
 104                destination = copy_pathspec(dest_path[0], argv, argc, 1);
 105        } else {
 106                if (argc != 1)
 107                        usage_with_options(builtin_mv_usage, builtin_mv_options);
 108                destination = dest_path;
 109        }
 110
 111        /* Checking */
 112        for (i = 0; i < argc; i++) {
 113                const char *src = source[i], *dst = destination[i];
 114                int length, src_is_dir;
 115                const char *bad = NULL;
 116
 117                if (show_only)
 118                        printf("Checking rename of '%s' to '%s'\n", src, dst);
 119
 120                length = strlen(src);
 121                if (lstat(src, &st) < 0)
 122                        bad = "bad source";
 123                else if (!strncmp(src, dst, length) &&
 124                                (dst[length] == 0 || dst[length] == '/')) {
 125                        bad = "can not move directory into itself";
 126                } else if ((src_is_dir = S_ISDIR(st.st_mode))
 127                                && lstat(dst, &st) == 0)
 128                        bad = "cannot move directory over file";
 129                else if (src_is_dir) {
 130                        const char *src_w_slash = add_slash(src);
 131                        int len_w_slash = length + 1;
 132                        int first, last;
 133
 134                        modes[i] = WORKING_DIRECTORY;
 135
 136                        first = cache_name_pos(src_w_slash, len_w_slash);
 137                        if (first >= 0)
 138                                die ("Huh? %.*s is in index?",
 139                                                len_w_slash, src_w_slash);
 140
 141                        first = -1 - first;
 142                        for (last = first; last < active_nr; last++) {
 143                                const char *path = active_cache[last]->name;
 144                                if (strncmp(path, src_w_slash, len_w_slash))
 145                                        break;
 146                        }
 147                        free((char *)src_w_slash);
 148
 149                        if (last - first < 1)
 150                                bad = "source directory is empty";
 151                        else {
 152                                int j, dst_len;
 153
 154                                if (last - first > 0) {
 155                                        source = xrealloc(source,
 156                                                        (argc + last - first)
 157                                                        * sizeof(char *));
 158                                        destination = xrealloc(destination,
 159                                                        (argc + last - first)
 160                                                        * sizeof(char *));
 161                                        modes = xrealloc(modes,
 162                                                        (argc + last - first)
 163                                                        * sizeof(enum update_mode));
 164                                }
 165
 166                                dst = add_slash(dst);
 167                                dst_len = strlen(dst) - 1;
 168
 169                                for (j = 0; j < last - first; j++) {
 170                                        const char *path =
 171                                                active_cache[first + j]->name;
 172                                        source[argc + j] = path;
 173                                        destination[argc + j] =
 174                                                prefix_path(dst, dst_len,
 175                                                        path + length);
 176                                        modes[argc + j] = INDEX;
 177                                }
 178                                argc += last - first;
 179                        }
 180                } else if (lstat(dst, &st) == 0) {
 181                        bad = "destination exists";
 182                        if (force) {
 183                                /*
 184                                 * only files can overwrite each other:
 185                                 * check both source and destination
 186                                 */
 187                                if (S_ISREG(st.st_mode)) {
 188                                        fprintf(stderr, "Warning: %s;"
 189                                                        " will overwrite!\n",
 190                                                        bad);
 191                                        bad = NULL;
 192                                        path_list_insert(dst, &overwritten);
 193                                } else
 194                                        bad = "Cannot overwrite";
 195                        }
 196                } else if (cache_name_pos(src, length) < 0)
 197                        bad = "not under version control";
 198                else if (path_list_has_path(&src_for_dst, dst))
 199                        bad = "multiple sources for the same target";
 200                else
 201                        path_list_insert(dst, &src_for_dst);
 202
 203                if (bad) {
 204                        if (ignore_errors) {
 205                                if (--argc > 0) {
 206                                        memmove(source + i, source + i + 1,
 207                                                (argc - i) * sizeof(char *));
 208                                        memmove(destination + i,
 209                                                destination + i + 1,
 210                                                (argc - i) * sizeof(char *));
 211                                }
 212                        } else
 213                                die ("%s, source=%s, destination=%s",
 214                                     bad, src, dst);
 215                }
 216        }
 217
 218        for (i = 0; i < argc; i++) {
 219                const char *src = source[i], *dst = destination[i];
 220                enum update_mode mode = modes[i];
 221                if (show_only || verbose)
 222                        printf("Renaming %s to %s\n", src, dst);
 223                if (!show_only && mode != INDEX &&
 224                                rename(src, dst) < 0 && !ignore_errors)
 225                        die ("renaming %s failed: %s", src, strerror(errno));
 226
 227                if (mode == WORKING_DIRECTORY)
 228                        continue;
 229
 230                if (cache_name_pos(src, strlen(src)) >= 0) {
 231                        path_list_insert(src, &deleted);
 232
 233                        /* destination can be a directory with 1 file inside */
 234                        if (path_list_has_path(&overwritten, dst))
 235                                path_list_insert(dst, &changed);
 236                        else
 237                                path_list_insert(dst, &added);
 238                } else
 239                        path_list_insert(dst, &added);
 240        }
 241
 242        if (show_only) {
 243                show_list("Changed  : ", &changed);
 244                show_list("Adding   : ", &added);
 245                show_list("Deleting : ", &deleted);
 246        } else {
 247                for (i = 0; i < changed.nr; i++) {
 248                        const char *path = changed.items[i].path;
 249                        int j = cache_name_pos(path, strlen(path));
 250                        struct cache_entry *ce = active_cache[j];
 251
 252                        if (j < 0)
 253                                die ("Huh? Cache entry for %s unknown?", path);
 254                        refresh_cache_entry(ce, 0);
 255                }
 256
 257                for (i = 0; i < added.nr; i++) {
 258                        const char *path = added.items[i].path;
 259                        add_file_to_cache(path, verbose);
 260                }
 261
 262                for (i = 0; i < deleted.nr; i++)
 263                        remove_file_from_cache(deleted.items[i].path);
 264
 265                if (active_cache_changed) {
 266                        if (write_cache(newfd, active_cache, active_nr) ||
 267                            commit_locked_index(&lock_file))
 268                                die("Unable to write new index file");
 269                }
 270        }
 271
 272        return 0;
 273}