Andrew's git / gitweb.git / builtin-mv.c
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builtin-mv.con commit apply: Allow blank *trailing* context lines to match beyond EOF (0c3ef98)
   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__DRY_RUN(&show_only),
  59                OPT_BOOLEAN('f', "force", &force, "force move/rename even if target exists"),
  60                OPT_BOOLEAN('k', NULL, &ignore_errors, "skip move/rename errors"),
  61                OPT_END(),
  62        };
  63        const char **source, **destination, **dest_path;
  64        enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
  65        struct stat st;
  66        struct string_list src_for_dst = {NULL, 0, 0, 0};
  67
  68        git_config(git_default_config, NULL);
  69
  70        argc = parse_options(argc, argv, prefix, builtin_mv_options,
  71                             builtin_mv_usage, 0);
  72        if (--argc < 1)
  73                usage_with_options(builtin_mv_usage, builtin_mv_options);
  74
  75        newfd = hold_locked_index(&lock_file, 1);
  76        if (read_cache() < 0)
  77                die("index file corrupt");
  78
  79        source = copy_pathspec(prefix, argv, argc, 0);
  80        modes = xcalloc(argc, sizeof(enum update_mode));
  81        dest_path = copy_pathspec(prefix, argv + argc, 1, 0);
  82
  83        if (dest_path[0][0] == '\0')
  84                /* special case: "." was normalized to "" */
  85                destination = copy_pathspec(dest_path[0], argv, argc, 1);
  86        else if (!lstat(dest_path[0], &st) &&
  87                        S_ISDIR(st.st_mode)) {
  88                dest_path[0] = add_slash(dest_path[0]);
  89                destination = copy_pathspec(dest_path[0], argv, argc, 1);
  90        } else {
  91                if (argc != 1)
  92                        usage_with_options(builtin_mv_usage, builtin_mv_options);
  93                destination = dest_path;
  94        }
  95
  96        /* Checking */
  97        for (i = 0; i < argc; i++) {
  98                const char *src = source[i], *dst = destination[i];
  99                int length, src_is_dir;
 100                const char *bad = NULL;
 101
 102                if (show_only)
 103                        printf("Checking rename of '%s' to '%s'\n", src, dst);
 104
 105                length = strlen(src);
 106                if (lstat(src, &st) < 0)
 107                        bad = "bad source";
 108                else if (!strncmp(src, dst, length) &&
 109                                (dst[length] == 0 || dst[length] == '/')) {
 110                        bad = "can not move directory into itself";
 111                } else if ((src_is_dir = S_ISDIR(st.st_mode))
 112                                && lstat(dst, &st) == 0)
 113                        bad = "cannot move directory over file";
 114                else if (src_is_dir) {
 115                        const char *src_w_slash = add_slash(src);
 116                        int len_w_slash = length + 1;
 117                        int first, last;
 118
 119                        modes[i] = WORKING_DIRECTORY;
 120
 121                        first = cache_name_pos(src_w_slash, len_w_slash);
 122                        if (first >= 0)
 123                                die ("Huh? %.*s is in index?",
 124                                                len_w_slash, src_w_slash);
 125
 126                        first = -1 - first;
 127                        for (last = first; last < active_nr; last++) {
 128                                const char *path = active_cache[last]->name;
 129                                if (strncmp(path, src_w_slash, len_w_slash))
 130                                        break;
 131                        }
 132                        free((char *)src_w_slash);
 133
 134                        if (last - first < 1)
 135                                bad = "source directory is empty";
 136                        else {
 137                                int j, dst_len;
 138
 139                                if (last - first > 0) {
 140                                        source = xrealloc(source,
 141                                                        (argc + last - first)
 142                                                        * sizeof(char *));
 143                                        destination = xrealloc(destination,
 144                                                        (argc + last - first)
 145                                                        * sizeof(char *));
 146                                        modes = xrealloc(modes,
 147                                                        (argc + last - first)
 148                                                        * sizeof(enum update_mode));
 149                                }
 150
 151                                dst = add_slash(dst);
 152                                dst_len = strlen(dst);
 153
 154                                for (j = 0; j < last - first; j++) {
 155                                        const char *path =
 156                                                active_cache[first + j]->name;
 157                                        source[argc + j] = path;
 158                                        destination[argc + j] =
 159                                                prefix_path(dst, dst_len,
 160                                                        path + length + 1);
 161                                        modes[argc + j] = INDEX;
 162                                }
 163                                argc += last - first;
 164                        }
 165                } else if (cache_name_pos(src, length) < 0)
 166                        bad = "not under version control";
 167                else if (lstat(dst, &st) == 0) {
 168                        bad = "destination exists";
 169                        if (force) {
 170                                /*
 171                                 * only files can overwrite each other:
 172                                 * check both source and destination
 173                                 */
 174                                if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
 175                                        warning("%s; will overwrite!", bad);
 176                                        bad = NULL;
 177                                } else
 178                                        bad = "Cannot overwrite";
 179                        }
 180                } else if (string_list_has_string(&src_for_dst, dst))
 181                        bad = "multiple sources for the same target";
 182                else
 183                        string_list_insert(dst, &src_for_dst);
 184
 185                if (bad) {
 186                        if (ignore_errors) {
 187                                if (--argc > 0) {
 188                                        memmove(source + i, source + i + 1,
 189                                                (argc - i) * sizeof(char *));
 190                                        memmove(destination + i,
 191                                                destination + i + 1,
 192                                                (argc - i) * sizeof(char *));
 193                                        i--;
 194                                }
 195                        } else
 196                                die ("%s, source=%s, destination=%s",
 197                                     bad, src, dst);
 198                }
 199        }
 200
 201        for (i = 0; i < argc; i++) {
 202                const char *src = source[i], *dst = destination[i];
 203                enum update_mode mode = modes[i];
 204                int pos;
 205                if (show_only || verbose)
 206                        printf("Renaming %s to %s\n", src, dst);
 207                if (!show_only && mode != INDEX &&
 208                                rename(src, dst) < 0 && !ignore_errors)
 209                        die_errno ("renaming '%s' failed", src);
 210
 211                if (mode == WORKING_DIRECTORY)
 212                        continue;
 213
 214                pos = cache_name_pos(src, strlen(src));
 215                assert(pos >= 0);
 216                if (!show_only)
 217                        rename_cache_entry_at(pos, dst);
 218        }
 219
 220        if (active_cache_changed) {
 221                if (write_cache(newfd, active_cache, active_nr) ||
 222                    commit_locked_index(&lock_file))
 223                        die("Unable to write new index file");
 224        }
 225
 226        return 0;
 227}