git.oblomov.eu Git - git/blob - environment.c

   1 /*
   2  * We put all the git config variables in this same object
   3  * file, so that programs can link against the config parser
   4  * without having to link against all the rest of git.
   5  *
   6  * In particular, no need to bring in libz etc unless needed,
   7  * even if you might want to know where the git directory etc
   8  * are.
   9  */
  10 #include "cache.h"
  11 #include "repository.h"
  12 #include "config.h"
  13 #include "refs.h"
  14 #include "fmt-merge-msg.h"
  15 #include "commit.h"
  16
  17 int trust_executable_bit = 1;
  18 int trust_ctime = 1;
  19 int check_stat = 1;
  20 int has_symlinks = 1;
  21 int minimum_abbrev = 4, default_abbrev = -1;
  22 int ignore_case;
  23 int assume_unchanged;
  24 int prefer_symlink_refs;
  25 int is_bare_repository_cfg = -1; /* unspecified */
  26 int warn_ambiguous_refs = 1;
  27 int warn_on_object_refname_ambiguity = 1;
  28 int ref_paranoia = -1;
  29 int repository_format_precious_objects;
  30 char *repository_format_partial_clone;
  31 const char *core_partial_clone_filter_default;
  32 const char *git_commit_encoding;
  33 const char *git_log_output_encoding;
  34 const char *apply_default_whitespace;
  35 const char *apply_default_ignorewhitespace;
  36 const char *git_attributes_file;
  37 const char *git_hooks_path;
  38 int zlib_compression_level = Z_BEST_SPEED;
  39 int core_compression_level;
  40 int pack_compression_level = Z_DEFAULT_COMPRESSION;
  41 int fsync_object_files;
  42 size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  43 size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  44 size_t delta_base_cache_limit = 96 * 1024 * 1024;
  45 unsigned long big_file_threshold = 512 * 1024 * 1024;
  46 int pager_use_color = 1;
  47 const char *editor_program;
  48 const char *askpass_program;
  49 const char *excludes_file;
  50 enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
  51 int check_replace_refs = 1;
  52 char *git_replace_ref_base;
  53 enum eol core_eol = EOL_UNSET;
  54 int global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
  55 char *check_roundtrip_encoding = "SHIFT-JIS";
  56 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  57 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  58 enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  59 enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
  60 #ifndef OBJECT_CREATION_MODE
  61 #define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
  62 #endif
  63 enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
  64 char *notes_ref_name;
  65 int grafts_replace_parents = 1;
  66 int core_commit_graph;
  67 int core_apply_sparse_checkout;
  68 int merge_log_config = -1;
  69 int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
  70 unsigned long pack_size_limit_cfg;
  71 enum hide_dotfiles_type hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
  72 enum log_refs_config log_all_ref_updates = LOG_REFS_UNSET;
  73
  74 #ifndef PROTECT_HFS_DEFAULT
  75 #define PROTECT_HFS_DEFAULT 0
  76 #endif
  77 int protect_hfs = PROTECT_HFS_DEFAULT;
  78
  79 #ifndef PROTECT_NTFS_DEFAULT
  80 #define PROTECT_NTFS_DEFAULT 0
  81 #endif
  82 int protect_ntfs = PROTECT_NTFS_DEFAULT;
  83 const char *core_fsmonitor;
  84
  85 /*
  86  * The character that begins a commented line in user-editable file
  87  * that is subject to stripspace.
  88  */
  89 char comment_line_char = '#';
  90 int auto_comment_line_char;
  91
  92 /* Parallel index stat data preload? */
  93 int core_preload_index = 1;
  94
  95 /*
  96  * This is a hack for test programs like test-dump-untracked-cache to
  97  * ensure that they do not modify the untracked cache when reading it.
  98  * Do not use it otherwise!
  99  */
 100 int ignore_untracked_cache_config;
 101
 102 /* This is set by setup_git_dir_gently() and/or git_default_config() */
 103 char *git_work_tree_cfg;
 104
 105 static char *git_namespace;
 106
 107 static const char *super_prefix;
 108
 109 /*
 110  * Repository-local GIT_* environment variables; see cache.h for details.
 111  */
 112 const char * const local_repo_env[] = {
 113         ALTERNATE_DB_ENVIRONMENT,
 114         CONFIG_ENVIRONMENT,
 115         CONFIG_DATA_ENVIRONMENT,
 116         DB_ENVIRONMENT,
 117         GIT_DIR_ENVIRONMENT,
 118         GIT_WORK_TREE_ENVIRONMENT,
 119         GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
 120         GRAFT_ENVIRONMENT,
 121         INDEX_ENVIRONMENT,
 122         NO_REPLACE_OBJECTS_ENVIRONMENT,
 123         GIT_REPLACE_REF_BASE_ENVIRONMENT,
 124         GIT_PREFIX_ENVIRONMENT,
 125         GIT_SUPER_PREFIX_ENVIRONMENT,
 126         GIT_SHALLOW_FILE_ENVIRONMENT,
 127         GIT_COMMON_DIR_ENVIRONMENT,
 128         NULL
 129 };
 130
 131 static char *expand_namespace(const char *raw_namespace)
 132 {
 133         struct strbuf buf = STRBUF_INIT;
 134         struct strbuf **components, **c;
 135
 136         if (!raw_namespace || !*raw_namespace)
 137                 return xstrdup("");
 138
 139         strbuf_addstr(&buf, raw_namespace);
 140         components = strbuf_split(&buf, '/');
 141         strbuf_reset(&buf);
 142         for (c = components; *c; c++)
 143                 if (strcmp((*c)->buf, "/") != 0)
 144                         strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 145         strbuf_list_free(components);
 146         if (check_refname_format(buf.buf, 0))
 147                 die("bad git namespace path \"%s\"", raw_namespace);
 148         strbuf_addch(&buf, '/');
 149         return strbuf_detach(&buf, NULL);
 150 }
 151
 152 void setup_git_env(void)
 153 {
 154         const char *shallow_file;
 155         const char *replace_ref_base;
 156
 157         if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 158                 check_replace_refs = 0;
 159         replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
 160         free(git_replace_ref_base);
 161         git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
 162                                                           : "refs/replace/");
 163         free(git_namespace);
 164         git_namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 165         shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
 166         if (shallow_file)
 167                 set_alternate_shallow_file(shallow_file, 0);
 168 }
 169
 170 int is_bare_repository(void)
 171 {
 172         /* if core.bare is not 'false', let's see if there is a work tree */
 173         return is_bare_repository_cfg && !get_git_work_tree();
 174 }
 175
 176 int have_git_dir(void)
 177 {
 178         return startup_info->have_repository
 179                 || the_repository->gitdir;
 180 }
 181
 182 const char *get_git_dir(void)
 183 {
 184         if (!the_repository->gitdir)
 185                 BUG("git environment hasn't been setup");
 186         return the_repository->gitdir;
 187 }
 188
 189 const char *get_git_common_dir(void)
 190 {
 191         if (!the_repository->commondir)
 192                 BUG("git environment hasn't been setup");
 193         return the_repository->commondir;
 194 }
 195
 196 const char *get_git_namespace(void)
 197 {
 198         if (!git_namespace)
 199                 BUG("git environment hasn't been setup");
 200         return git_namespace;
 201 }
 202
 203 const char *strip_namespace(const char *namespaced_ref)
 204 {
 205         const char *out;
 206         if (skip_prefix(namespaced_ref, get_git_namespace(), &out))
 207                 return out;
 208         return NULL;
 209 }
 210
 211 const char *get_super_prefix(void)
 212 {
 213         static int initialized;
 214         if (!initialized) {
 215                 super_prefix = getenv(GIT_SUPER_PREFIX_ENVIRONMENT);
 216                 initialized = 1;
 217         }
 218         return super_prefix;
 219 }
 220
 221 static int git_work_tree_initialized;
 222
 223 /*
 224  * Note.  This works only before you used a work tree.  This was added
 225  * primarily to support git-clone to work in a new repository it just
 226  * created, and is not meant to flip between different work trees.
 227  */
 228 void set_git_work_tree(const char *new_work_tree)
 229 {
 230         if (git_work_tree_initialized) {
 231                 new_work_tree = real_path(new_work_tree);
 232                 if (strcmp(new_work_tree, the_repository->worktree))
 233                         die("internal error: work tree has already been set\n"
 234                             "Current worktree: %s\nNew worktree: %s",
 235                             the_repository->worktree, new_work_tree);
 236                 return;
 237         }
 238         git_work_tree_initialized = 1;
 239         repo_set_worktree(the_repository, new_work_tree);
 240 }
 241
 242 const char *get_git_work_tree(void)
 243 {
 244         return the_repository->worktree;
 245 }
 246
 247 char *get_object_directory(void)
 248 {
 249         if (!the_repository->objectdir)
 250                 BUG("git environment hasn't been setup");
 251         return the_repository->objectdir;
 252 }
 253
 254 int odb_mkstemp(struct strbuf *temp_filename, const char *pattern)
 255 {
 256         int fd;
 257         /*
 258          * we let the umask do its job, don't try to be more
 259          * restrictive except to remove write permission.
 260          */
 261         int mode = 0444;
 262         git_path_buf(temp_filename, "objects/%s", pattern);
 263         fd = git_mkstemp_mode(temp_filename->buf, mode);
 264         if (0 <= fd)
 265                 return fd;
 266
 267         /* slow path */
 268         /* some mkstemp implementations erase temp_filename on failure */
 269         git_path_buf(temp_filename, "objects/%s", pattern);
 270         safe_create_leading_directories(temp_filename->buf);
 271         return xmkstemp_mode(temp_filename->buf, mode);
 272 }
 273
 274 int odb_pack_keep(const char *name)
 275 {
 276         int fd;
 277
 278         fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 279         if (0 <= fd)
 280                 return fd;
 281
 282         /* slow path */
 283         safe_create_leading_directories_const(name);
 284         return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 285 }
 286
 287 char *get_index_file(void)
 288 {
 289         if (!the_repository->index_file)
 290                 BUG("git environment hasn't been setup");
 291         return the_repository->index_file;
 292 }
 293
 294 char *get_graft_file(void)
 295 {
 296         if (!the_repository->graft_file)
 297                 BUG("git environment hasn't been setup");
 298         return the_repository->graft_file;
 299 }
 300
 301 int set_git_dir(const char *path)
 302 {
 303         if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 304                 return error("Could not set GIT_DIR to '%s'", path);
 305         repo_set_gitdir(the_repository, path);
 306         setup_git_env();
 307         return 0;
 308 }
 309
 310 const char *get_log_output_encoding(void)
 311 {
 312         return git_log_output_encoding ? git_log_output_encoding
 313                 : get_commit_output_encoding();
 314 }
 315
 316 const char *get_commit_output_encoding(void)
 317 {
 318         return git_commit_encoding ? git_commit_encoding : "UTF-8";
 319 }
 320
 321 static int the_shared_repository = PERM_UMASK;
 322 static int need_shared_repository_from_config = 1;
 323
 324 void set_shared_repository(int value)
 325 {
 326         the_shared_repository = value;
 327         need_shared_repository_from_config = 0;
 328 }
 329
 330 int get_shared_repository(void)
 331 {
 332         if (need_shared_repository_from_config) {
 333                 const char *var = "core.sharedrepository";
 334                 const char *value;
 335                 if (!git_config_get_value(var, &value))
 336                         the_shared_repository = git_config_perm(var, value);
 337                 need_shared_repository_from_config = 0;
 338         }
 339         return the_shared_repository;
 340 }
 341
 342 void reset_shared_repository(void)
 343 {
 344         need_shared_repository_from_config = 1;
 345 }
 346
 347 int use_optional_locks(void)
 348 {
 349         return git_env_bool(GIT_OPTIONAL_LOCKS_ENVIRONMENT, 1);
 350 }
 351
 352 int print_sha1_ellipsis(void)
 353 {
 354         /*
 355          * Determine if the calling environment contains the variable
 356          * GIT_PRINT_SHA1_ELLIPSIS set to "yes".
 357          */
 358         static int cached_result = -1; /* unknown */
 359
 360         if (cached_result < 0) {
 361                 const char *v = getenv("GIT_PRINT_SHA1_ELLIPSIS");
 362                 cached_result = (v && !strcasecmp(v, "yes"));
 363         }
 364         return cached_result;
 365 }