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 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         free(git_replace_ref_base);
 156         git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
 157                                                           : "refs/replace/");
 158         free(namespace);
 159         namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 160         shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
 161         if (shallow_file)
 162                 set_alternate_shallow_file(shallow_file, 0);
 163 }
 164
 165 int is_bare_repository(void)
 166 {
 167         /* if core.bare is not 'false', let's see if there is a work tree */
 168         return is_bare_repository_cfg && !get_git_work_tree();
 169 }
 170
 171 int have_git_dir(void)
 172 {
 173         return startup_info->have_repository
 174                 || the_repository->gitdir;
 175 }
 176
 177 const char *get_git_dir(void)
 178 {
 179         if (!the_repository->gitdir)
 180                 BUG("git environment hasn't been setup");
 181         return the_repository->gitdir;
 182 }
 183
 184 const char *get_git_common_dir(void)
 185 {
 186         if (!the_repository->commondir)
 187                 BUG("git environment hasn't been setup");
 188         return the_repository->commondir;
 189 }
 190
 191 const char *get_git_namespace(void)
 192 {
 193         if (!namespace)
 194                 BUG("git environment hasn't been setup");
 195         return namespace;
 196 }
 197
 198 const char *strip_namespace(const char *namespaced_ref)
 199 {
 200         const char *out;
 201         if (skip_prefix(namespaced_ref, get_git_namespace(), &out))
 202                 return out;
 203         return NULL;
 204 }
 205
 206 const char *get_super_prefix(void)
 207 {
 208         static int initialized;
 209         if (!initialized) {
 210                 super_prefix = getenv(GIT_SUPER_PREFIX_ENVIRONMENT);
 211                 initialized = 1;
 212         }
 213         return super_prefix;
 214 }
 215
 216 static int git_work_tree_initialized;
 217
 218 /*
 219  * Note.  This works only before you used a work tree.  This was added
 220  * primarily to support git-clone to work in a new repository it just
 221  * created, and is not meant to flip between different work trees.
 222  */
 223 void set_git_work_tree(const char *new_work_tree)
 224 {
 225         if (git_work_tree_initialized) {
 226                 new_work_tree = real_path(new_work_tree);
 227                 if (strcmp(new_work_tree, the_repository->worktree))
 228                         die("internal error: work tree has already been set\n"
 229                             "Current worktree: %s\nNew worktree: %s",
 230                             the_repository->worktree, new_work_tree);
 231                 return;
 232         }
 233         git_work_tree_initialized = 1;
 234         repo_set_worktree(the_repository, new_work_tree);
 235 }
 236
 237 const char *get_git_work_tree(void)
 238 {
 239         return the_repository->worktree;
 240 }
 241
 242 char *get_object_directory(void)
 243 {
 244         if (!the_repository->objectdir)
 245                 BUG("git environment hasn't been setup");
 246         return the_repository->objectdir;
 247 }
 248
 249 int odb_mkstemp(struct strbuf *template, const char *pattern)
 250 {
 251         int fd;
 252         /*
 253          * we let the umask do its job, don't try to be more
 254          * restrictive except to remove write permission.
 255          */
 256         int mode = 0444;
 257         git_path_buf(template, "objects/%s", pattern);
 258         fd = git_mkstemp_mode(template->buf, mode);
 259         if (0 <= fd)
 260                 return fd;
 261
 262         /* slow path */
 263         /* some mkstemp implementations erase template on failure */
 264         git_path_buf(template, "objects/%s", pattern);
 265         safe_create_leading_directories(template->buf);
 266         return xmkstemp_mode(template->buf, mode);
 267 }
 268
 269 int odb_pack_keep(const char *name)
 270 {
 271         int fd;
 272
 273         fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 274         if (0 <= fd)
 275                 return fd;
 276
 277         /* slow path */
 278         safe_create_leading_directories_const(name);
 279         return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 280 }
 281
 282 char *get_index_file(void)
 283 {
 284         if (!the_repository->index_file)
 285                 BUG("git environment hasn't been setup");
 286         return the_repository->index_file;
 287 }
 288
 289 char *get_graft_file(void)
 290 {
 291         if (!the_repository->graft_file)
 292                 BUG("git environment hasn't been setup");
 293         return the_repository->graft_file;
 294 }
 295
 296 int set_git_dir(const char *path)
 297 {
 298         if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 299                 return error("Could not set GIT_DIR to '%s'", path);
 300         repo_set_gitdir(the_repository, path);
 301         setup_git_env();
 302         return 0;
 303 }
 304
 305 const char *get_log_output_encoding(void)
 306 {
 307         return git_log_output_encoding ? git_log_output_encoding
 308                 : get_commit_output_encoding();
 309 }
 310
 311 const char *get_commit_output_encoding(void)
 312 {
 313         return git_commit_encoding ? git_commit_encoding : "UTF-8";
 314 }
 315
 316 static int the_shared_repository = PERM_UMASK;
 317 static int need_shared_repository_from_config = 1;
 318
 319 void set_shared_repository(int value)
 320 {
 321         the_shared_repository = value;
 322         need_shared_repository_from_config = 0;
 323 }
 324
 325 int get_shared_repository(void)
 326 {
 327         if (need_shared_repository_from_config) {
 328                 const char *var = "core.sharedrepository";
 329                 const char *value;
 330                 if (!git_config_get_value(var, &value))
 331                         the_shared_repository = git_config_perm(var, value);
 332                 need_shared_repository_from_config = 0;
 333         }
 334         return the_shared_repository;
 335 }
 336
 337 void reset_shared_repository(void)
 338 {
 339         need_shared_repository_from_config = 1;
 340 }