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