builtin/clean.c

   1 /*
   2  * "git clean" builtin command
   3  *
   4  * Copyright (C) 2007 Shawn Bohrer
   5  *
   6  * Based on git-clean.sh by Pavel Roskin
   7  */
   8
   9 #include "builtin.h"
  10 #include "cache.h"
  11 #include "dir.h"
  12 #include "parse-options.h"
  13 #include "refs.h"
  14 #include "string-list.h"
  15 #include "quote.h"
  16
  17 static int force = -1; /* unset */
  18
  19 static const char *const builtin_clean_usage[] = {
  20         N_("git clean [-d] [-f] [-n] [-q] [-e <pattern>] [-x | -X] [--] <paths>..."),
  21         NULL
  22 };
  23
  24 static const char *msg_remove = N_("Removing %s\n");
  25 static const char *msg_would_remove = N_("Would remove %s\n");
  26 static const char *msg_skip_git_dir = N_("Skipping repository %s\n");
  27 static const char *msg_would_skip_git_dir = N_("Would skip repository %s\n");
  28 static const char *msg_warn_remove_failed = N_("failed to remove %s");
  29
  30 static int git_clean_config(const char *var, const char *value, void *cb)
  31 {
  32         if (!strcmp(var, "clean.requireforce"))
  33                 force = !git_config_bool(var, value);
  34         return git_default_config(var, value, cb);
  35 }
  36
  37 static int exclude_cb(const struct option *opt, const char *arg, int unset)
  38 {
  39         struct string_list *exclude_list = opt->value;
  40         string_list_append(exclude_list, arg);
  41         return 0;
  42 }
  43
  44 static int remove_dirs(struct strbuf *path, const char *prefix, int force_flag,
  45                 int dry_run, int quiet, int *dir_gone)
  46 {
  47         DIR *dir;
  48         struct strbuf quoted = STRBUF_INIT;
  49         struct dirent *e;
  50         int res = 0, ret = 0, gone = 1, original_len = path->len, len, i;
  51         unsigned char submodule_head[20];
  52         struct string_list dels = STRING_LIST_INIT_DUP;
  53
  54         *dir_gone = 1;
  55
  56         if ((force_flag & REMOVE_DIR_KEEP_NESTED_GIT) &&
  57                         !resolve_gitlink_ref(path->buf, "HEAD", submodule_head)) {
  58                 if (!quiet) {
  59                         quote_path_relative(path->buf, strlen(path->buf), &quoted, prefix);
  60                         printf(dry_run ?  _(msg_would_skip_git_dir) : _(msg_skip_git_dir),
  61                                         quoted.buf);
  62                 }
  63
  64                 *dir_gone = 0;
  65                 return 0;
  66         }
  67
  68         dir = opendir(path->buf);
  69         if (!dir) {
  70                 /* an empty dir could be removed even if it is unreadble */
  71                 res = dry_run ? 0 : rmdir(path->buf);
  72                 if (res) {
  73                         quote_path_relative(path->buf, strlen(path->buf), &quoted, prefix);
  74                         warning(_(msg_warn_remove_failed), quoted.buf);
  75                         *dir_gone = 0;
  76                 }
  77                 return res;
  78         }
  79
  80         if (path->buf[original_len - 1] != '/')
  81                 strbuf_addch(path, '/');
  82
  83         len = path->len;
  84         while ((e = readdir(dir)) != NULL) {
  85                 struct stat st;
  86                 if (is_dot_or_dotdot(e->d_name))
  87                         continue;
  88
  89                 strbuf_setlen(path, len);
  90                 strbuf_addstr(path, e->d_name);
  91                 if (lstat(path->buf, &st))
  92                         ; /* fall thru */
  93                 else if (S_ISDIR(st.st_mode)) {
  94                         if (remove_dirs(path, prefix, force_flag, dry_run, quiet, &gone))
  95                                 ret = 1;
  96                         if (gone) {
  97                                 quote_path_relative(path->buf, strlen(path->buf), &quoted, prefix);
  98                                 string_list_append(&dels, quoted.buf);
  99                         } else
 100                                 *dir_gone = 0;
 101                         continue;
 102                 } else {
 103                         res = dry_run ? 0 : unlink(path->buf);
 104                         if (!res) {
 105                                 quote_path_relative(path->buf, strlen(path->buf), &quoted, prefix);
 106                                 string_list_append(&dels, quoted.buf);
 107                         } else {
 108                                 quote_path_relative(path->buf, strlen(path->buf), &quoted, prefix);
 109                                 warning(_(msg_warn_remove_failed), quoted.buf);
 110                                 *dir_gone = 0;
 111                                 ret = 1;
 112                         }
 113                         continue;
 114                 }
 115
 116                 /* path too long, stat fails, or non-directory still exists */
 117                 *dir_gone = 0;
 118                 ret = 1;
 119                 break;
 120         }
 121         closedir(dir);
 122
 123         strbuf_setlen(path, original_len);
 124
 125         if (*dir_gone) {
 126                 res = dry_run ? 0 : rmdir(path->buf);
 127                 if (!res)
 128                         *dir_gone = 1;
 129                 else {
 130                         quote_path_relative(path->buf, strlen(path->buf), &quoted, prefix);
 131                         warning(_(msg_warn_remove_failed), quoted.buf);
 132                         *dir_gone = 0;
 133                         ret = 1;
 134                 }
 135         }
 136
 137         if (!*dir_gone && !quiet) {
 138                 for (i = 0; i < dels.nr; i++)
 139                         printf(dry_run ?  _(msg_would_remove) : _(msg_remove), dels.items[i].string);
 140         }
 141         string_list_clear(&dels, 0);
 142         return ret;
 143 }
 144
 145 int cmd_clean(int argc, const char **argv, const char *prefix)
 146 {
 147         int i, res;
 148         int dry_run = 0, remove_directories = 0, quiet = 0, ignored = 0;
 149         int ignored_only = 0, config_set = 0, errors = 0, gone = 1;
 150         int rm_flags = REMOVE_DIR_KEEP_NESTED_GIT;
 151         struct strbuf directory = STRBUF_INIT;
 152         struct dir_struct dir;
 153         static const char **pathspec;
 154         struct strbuf buf = STRBUF_INIT;
 155         struct string_list exclude_list = STRING_LIST_INIT_NODUP;
 156         struct exclude_list *el;
 157         const char *qname;
 158         char *seen = NULL;
 159         struct option options[] = {
 160                 OPT__QUIET(&quiet, N_("do not print names of files removed")),
 161                 OPT__DRY_RUN(&dry_run, N_("dry run")),
 162                 OPT__FORCE(&force, N_("force")),
 163                 OPT_BOOLEAN('d', NULL, &remove_directories,
 164                                 N_("remove whole directories")),
 165                 { OPTION_CALLBACK, 'e', "exclude", &exclude_list, N_("pattern"),
 166                   N_("add <pattern> to ignore rules"), PARSE_OPT_NONEG, exclude_cb },
 167                 OPT_BOOLEAN('x', NULL, &ignored, N_("remove ignored files, too")),
 168                 OPT_BOOLEAN('X', NULL, &ignored_only,
 169                                 N_("remove only ignored files")),
 170                 OPT_END()
 171         };
 172
 173         git_config(git_clean_config, NULL);
 174         if (force < 0)
 175                 force = 0;
 176         else
 177                 config_set = 1;
 178
 179         argc = parse_options(argc, argv, prefix, options, builtin_clean_usage,
 180                              0);
 181
 182         memset(&dir, 0, sizeof(dir));
 183         if (ignored_only)
 184                 dir.flags |= DIR_SHOW_IGNORED;
 185
 186         if (ignored && ignored_only)
 187                 die(_("-x and -X cannot be used together"));
 188
 189         if (!dry_run && !force) {
 190                 if (config_set)
 191                         die(_("clean.requireForce set to true and neither -n nor -f given; "
 192                                   "refusing to clean"));
 193                 else
 194                         die(_("clean.requireForce defaults to true and neither -n nor -f given; "
 195                                   "refusing to clean"));
 196         }
 197
 198         if (force > 1)
 199                 rm_flags = 0;
 200
 201         dir.flags |= DIR_SHOW_OTHER_DIRECTORIES;
 202
 203         if (read_cache() < 0)
 204                 die(_("index file corrupt"));
 205
 206         if (!ignored)
 207                 setup_standard_excludes(&dir);
 208
 209         el = add_exclude_list(&dir, EXC_CMDL, "--exclude option");
 210         for (i = 0; i < exclude_list.nr; i++)
 211                 add_exclude(exclude_list.items[i].string, "", 0, el, -(i+1));
 212
 213         pathspec = get_pathspec(prefix, argv);
 214
 215         fill_directory(&dir, pathspec);
 216
 217         if (pathspec)
 218                 seen = xmalloc(argc > 0 ? argc : 1);
 219
 220         for (i = 0; i < dir.nr; i++) {
 221                 struct dir_entry *ent = dir.entries[i];
 222                 int len, pos;
 223                 int matches = 0;
 224                 struct cache_entry *ce;
 225                 struct stat st;
 226
 227                 /*
 228                  * Remove the '/' at the end that directory
 229                  * walking adds for directory entries.
 230                  */
 231                 len = ent->len;
 232                 if (len && ent->name[len-1] == '/')
 233                         len--;
 234                 pos = cache_name_pos(ent->name, len);
 235                 if (0 <= pos)
 236                         continue;       /* exact match */
 237                 pos = -pos - 1;
 238                 if (pos < active_nr) {
 239                         ce = active_cache[pos];
 240                         if (ce_namelen(ce) == len &&
 241                             !memcmp(ce->name, ent->name, len))
 242                                 continue; /* Yup, this one exists unmerged */
 243                 }
 244
 245                 /*
 246                  * we might have removed this as part of earlier
 247                  * recursive directory removal, so lstat() here could
 248                  * fail with ENOENT.
 249                  */
 250                 if (lstat(ent->name, &st))
 251                         continue;
 252
 253                 if (pathspec) {
 254                         memset(seen, 0, argc > 0 ? argc : 1);
 255                         matches = match_pathspec(pathspec, ent->name, len,
 256                                                  0, seen);
 257                 }
 258
 259                 if (S_ISDIR(st.st_mode)) {
 260                         strbuf_addstr(&directory, ent->name);
 261                         if (remove_directories || (matches == MATCHED_EXACTLY)) {
 262                                 if (remove_dirs(&directory, prefix, rm_flags, dry_run, quiet, &gone))
 263                                         errors++;
 264                                 if (gone && !quiet) {
 265                                         qname = quote_path_relative(directory.buf, directory.len, &buf, prefix);
 266                                         printf(dry_run ? _(msg_would_remove) : _(msg_remove), qname);
 267                                 }
 268                         }
 269                         strbuf_reset(&directory);
 270                 } else {
 271                         if (pathspec && !matches)
 272                                 continue;
 273                         res = dry_run ? 0 : unlink(ent->name);
 274                         if (res) {
 275                                 qname = quote_path_relative(ent->name, -1, &buf, prefix);
 276                                 warning(_(msg_warn_remove_failed), qname);
 277                                 errors++;
 278                         } else if (!quiet) {
 279                                 qname = quote_path_relative(ent->name, -1, &buf, prefix);
 280                                 printf(dry_run ? _(msg_would_remove) : _(msg_remove), qname);
 281                         }
 282                 }
 283         }
 284         free(seen);
 285
 286         strbuf_release(&directory);
 287         string_list_clear(&exclude_list, 0);
 288         return (errors != 0);
 289 }