builtin / mv.con commit Merge branch 'po/range-doc' into maint (f0b2db2)
   1/*
   2 * "git mv" builtin command
   3 *
   4 * Copyright (C) 2006 Johannes Schindelin
   5 */
   6#include "builtin.h"
   7#include "lockfile.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
  14static 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
  22static 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;
  28        ALLOC_ARRAY(result, count + 1);
  29        memcpy(result, pathspec, count * sizeof(const char *));
  30        result[count] = NULL;
  31        for (i = 0; i < count; i++) {
  32                int length = strlen(result[i]);
  33                int to_copy = length;
  34                while (!(flags & KEEP_TRAILING_SLASH) &&
  35                       to_copy > 0 && is_dir_sep(result[i][to_copy - 1]))
  36                        to_copy--;
  37                if (to_copy != length || flags & DUP_BASENAME) {
  38                        char *it = xmemdupz(result[i], to_copy);
  39                        if (flags & DUP_BASENAME) {
  40                                result[i] = xstrdup(basename(it));
  41                                free(it);
  42                        } else
  43                                result[i] = it;
  44                }
  45        }
  46        return get_pathspec(prefix, result);
  47}
  48
  49static const char *add_slash(const char *path)
  50{
  51        size_t len = strlen(path);
  52        if (path[len - 1] != '/') {
  53                char *with_slash = xmalloc(st_add(len, 2));
  54                memcpy(with_slash, path, len);
  55                with_slash[len++] = '/';
  56                with_slash[len] = 0;
  57                return with_slash;
  58        }
  59        return path;
  60}
  61
  62static struct lock_file lock_file;
  63#define SUBMODULE_WITH_GITDIR ((const char *)1)
  64
  65static void prepare_move_submodule(const char *src, int first,
  66                                   const char **submodule_gitfile)
  67{
  68        struct strbuf submodule_dotgit = STRBUF_INIT;
  69        if (!S_ISGITLINK(active_cache[first]->ce_mode))
  70                die(_("Directory %s is in index and no submodule?"), src);
  71        if (!is_staging_gitmodules_ok())
  72                die(_("Please stage your changes to .gitmodules or stash them to proceed"));
  73        strbuf_addf(&submodule_dotgit, "%s/.git", src);
  74        *submodule_gitfile = read_gitfile(submodule_dotgit.buf);
  75        if (*submodule_gitfile)
  76                *submodule_gitfile = xstrdup(*submodule_gitfile);
  77        else
  78                *submodule_gitfile = SUBMODULE_WITH_GITDIR;
  79        strbuf_release(&submodule_dotgit);
  80}
  81
  82static int index_range_of_same_dir(const char *src, int length,
  83                                   int *first_p, int *last_p)
  84{
  85        const char *src_w_slash = add_slash(src);
  86        int first, last, len_w_slash = length + 1;
  87
  88        first = cache_name_pos(src_w_slash, len_w_slash);
  89        if (first >= 0)
  90                die(_("%.*s is in index"), len_w_slash, src_w_slash);
  91
  92        first = -1 - first;
  93        for (last = first; last < active_nr; last++) {
  94                const char *path = active_cache[last]->name;
  95                if (strncmp(path, src_w_slash, len_w_slash))
  96                        break;
  97        }
  98        if (src_w_slash != src)
  99                free((char *)src_w_slash);
 100        *first_p = first;
 101        *last_p = last;
 102        return last - first;
 103}
 104
 105int cmd_mv(int argc, const char **argv, const char *prefix)
 106{
 107        int i, flags, gitmodules_modified = 0;
 108        int verbose = 0, show_only = 0, force = 0, ignore_errors = 0;
 109        struct option builtin_mv_options[] = {
 110                OPT__VERBOSE(&verbose, N_("be verbose")),
 111                OPT__DRY_RUN(&show_only, N_("dry run")),
 112                OPT__FORCE(&force, N_("force move/rename even if target exists")),
 113                OPT_BOOL('k', NULL, &ignore_errors, N_("skip move/rename errors")),
 114                OPT_END(),
 115        };
 116        const char **source, **destination, **dest_path, **submodule_gitfile;
 117        enum update_mode { BOTH = 0, WORKING_DIRECTORY, INDEX } *modes;
 118        struct stat st;
 119        struct string_list src_for_dst = STRING_LIST_INIT_NODUP;
 120
 121        gitmodules_config();
 122        git_config(git_default_config, NULL);
 123
 124        argc = parse_options(argc, argv, prefix, builtin_mv_options,
 125                             builtin_mv_usage, 0);
 126        if (--argc < 1)
 127                usage_with_options(builtin_mv_usage, builtin_mv_options);
 128
 129        hold_locked_index(&lock_file, 1);
 130        if (read_cache() < 0)
 131                die(_("index file corrupt"));
 132
 133        source = internal_copy_pathspec(prefix, argv, argc, 0);
 134        modes = xcalloc(argc, sizeof(enum update_mode));
 135        /*
 136         * Keep trailing slash, needed to let
 137         * "git mv file no-such-dir/" error out, except in the case
 138         * "git mv directory no-such-dir/".
 139         */
 140        flags = KEEP_TRAILING_SLASH;
 141        if (argc == 1 && is_directory(argv[0]) && !is_directory(argv[1]))
 142                flags = 0;
 143        dest_path = internal_copy_pathspec(prefix, argv + argc, 1, flags);
 144        submodule_gitfile = xcalloc(argc, sizeof(char *));
 145
 146        if (dest_path[0][0] == '\0')
 147                /* special case: "." was normalized to "" */
 148                destination = internal_copy_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
 149        else if (!lstat(dest_path[0], &st) &&
 150                        S_ISDIR(st.st_mode)) {
 151                dest_path[0] = add_slash(dest_path[0]);
 152                destination = internal_copy_pathspec(dest_path[0], argv, argc, DUP_BASENAME);
 153        } else {
 154                if (argc != 1)
 155                        die(_("destination '%s' is not a directory"), dest_path[0]);
 156                destination = dest_path;
 157        }
 158
 159        /* Checking */
 160        for (i = 0; i < argc; i++) {
 161                const char *src = source[i], *dst = destination[i];
 162                int length, src_is_dir;
 163                const char *bad = NULL;
 164
 165                if (show_only)
 166                        printf(_("Checking rename of '%s' to '%s'\n"), src, dst);
 167
 168                length = strlen(src);
 169                if (lstat(src, &st) < 0)
 170                        bad = _("bad source");
 171                else if (!strncmp(src, dst, length) &&
 172                                (dst[length] == 0 || dst[length] == '/')) {
 173                        bad = _("can not move directory into itself");
 174                } else if ((src_is_dir = S_ISDIR(st.st_mode))
 175                                && lstat(dst, &st) == 0)
 176                        bad = _("cannot move directory over file");
 177                else if (src_is_dir) {
 178                        int first = cache_name_pos(src, length), last;
 179
 180                        if (first >= 0)
 181                                prepare_move_submodule(src, first,
 182                                                       submodule_gitfile + i);
 183                        else if (index_range_of_same_dir(src, length,
 184                                                         &first, &last) < 1)
 185                                bad = _("source directory is empty");
 186                        else { /* last - first >= 1 */
 187                                int j, dst_len, n;
 188
 189                                modes[i] = WORKING_DIRECTORY;
 190                                n = argc + last - first;
 191                                REALLOC_ARRAY(source, n);
 192                                REALLOC_ARRAY(destination, n);
 193                                REALLOC_ARRAY(modes, n);
 194                                REALLOC_ARRAY(submodule_gitfile, n);
 195
 196                                dst = add_slash(dst);
 197                                dst_len = strlen(dst);
 198
 199                                for (j = 0; j < last - first; j++) {
 200                                        const char *path = active_cache[first + j]->name;
 201                                        source[argc + j] = path;
 202                                        destination[argc + j] =
 203                                                prefix_path(dst, dst_len, path + length + 1);
 204                                        modes[argc + j] = INDEX;
 205                                        submodule_gitfile[argc + j] = NULL;
 206                                }
 207                                argc += last - first;
 208                        }
 209                } else if (cache_name_pos(src, length) < 0)
 210                        bad = _("not under version control");
 211                else if (lstat(dst, &st) == 0 &&
 212                         (!ignore_case || strcasecmp(src, dst))) {
 213                        bad = _("destination exists");
 214                        if (force) {
 215                                /*
 216                                 * only files can overwrite each other:
 217                                 * check both source and destination
 218                                 */
 219                                if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) {
 220                                        if (verbose)
 221                                                warning(_("overwriting '%s'"), dst);
 222                                        bad = NULL;
 223                                } else
 224                                        bad = _("Cannot overwrite");
 225                        }
 226                } else if (string_list_has_string(&src_for_dst, dst))
 227                        bad = _("multiple sources for the same target");
 228                else if (is_dir_sep(dst[strlen(dst) - 1]))
 229                        bad = _("destination directory does not exist");
 230                else
 231                        string_list_insert(&src_for_dst, dst);
 232
 233                if (!bad)
 234                        continue;
 235                if (!ignore_errors)
 236                        die(_("%s, source=%s, destination=%s"),
 237                             bad, src, dst);
 238                if (--argc > 0) {
 239                        int n = argc - i;
 240                        memmove(source + i, source + i + 1,
 241                                n * sizeof(char *));
 242                        memmove(destination + i, destination + i + 1,
 243                                n * sizeof(char *));
 244                        memmove(modes + i, modes + i + 1,
 245                                n * sizeof(enum update_mode));
 246                        memmove(submodule_gitfile + i, submodule_gitfile + i + 1,
 247                                n * sizeof(char *));
 248                        i--;
 249                }
 250        }
 251
 252        for (i = 0; i < argc; i++) {
 253                const char *src = source[i], *dst = destination[i];
 254                enum update_mode mode = modes[i];
 255                int pos;
 256                if (show_only || verbose)
 257                        printf(_("Renaming %s to %s\n"), src, dst);
 258                if (show_only)
 259                        continue;
 260                if (mode != INDEX && rename(src, dst) < 0) {
 261                        if (ignore_errors)
 262                                continue;
 263                        die_errno(_("renaming '%s' failed"), src);
 264                }
 265                if (submodule_gitfile[i]) {
 266                        if (submodule_gitfile[i] != SUBMODULE_WITH_GITDIR)
 267                                connect_work_tree_and_git_dir(dst, submodule_gitfile[i]);
 268                        if (!update_path_in_gitmodules(src, dst))
 269                                gitmodules_modified = 1;
 270                }
 271
 272                if (mode == WORKING_DIRECTORY)
 273                        continue;
 274
 275                pos = cache_name_pos(src, strlen(src));
 276                assert(pos >= 0);
 277                if (!show_only)
 278                        rename_cache_entry_at(pos, dst);
 279        }
 280
 281        if (gitmodules_modified)
 282                stage_updated_gitmodules();
 283
 284        if (active_cache_changed &&
 285            write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
 286                die(_("Unable to write new index file"));
 287
 288        return 0;
 289}