builtin-mv.con commit Make git-mv a builtin (11be42a)
   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
  14static const char builtin_mv_usage[] =
  15"git-mv [-n] [-f] (<source> <destination> | [-k] <source>... <destination>)";
  16
  17static 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
  34static 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
  45static struct lock_file lock_file;
  46
  47int 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}