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.
 
   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
 
  12 #include "repository.h"
 
  15 #include "fmt-merge-msg.h"
 
  17 #include "argv-array.h"
 
  18 #include "object-store.h"
 
  19 #include "chdir-notify.h"
 
  21 int trust_executable_bit = 1;
 
  25 int minimum_abbrev = 4, default_abbrev = -1;
 
  28 int prefer_symlink_refs;
 
  29 int is_bare_repository_cfg = -1; /* unspecified */
 
  30 int warn_ambiguous_refs = 1;
 
  31 int warn_on_object_refname_ambiguity = 1;
 
  32 int ref_paranoia = -1;
 
  33 int repository_format_precious_objects;
 
  34 int repository_format_worktree_config;
 
  35 const char *git_commit_encoding;
 
  36 const char *git_log_output_encoding;
 
  37 const char *apply_default_whitespace;
 
  38 const char *apply_default_ignorewhitespace;
 
  39 const char *git_attributes_file;
 
  40 const char *git_hooks_path;
 
  41 int zlib_compression_level = Z_BEST_SPEED;
 
  42 int core_compression_level;
 
  43 int pack_compression_level = Z_DEFAULT_COMPRESSION;
 
  44 int fsync_object_files;
 
  45 size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
 
  46 size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
 
  47 size_t delta_base_cache_limit = 96 * 1024 * 1024;
 
  48 unsigned long big_file_threshold = 512 * 1024 * 1024;
 
  49 int pager_use_color = 1;
 
  50 const char *editor_program;
 
  51 const char *askpass_program;
 
  52 const char *excludes_file;
 
  53 enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
 
  54 int read_replace_refs = 1;
 
  55 char *git_replace_ref_base;
 
  56 enum eol core_eol = EOL_UNSET;
 
  57 int global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
 
  58 char *check_roundtrip_encoding = "SHIFT-JIS";
 
  59 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
 
  60 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
 
  61 enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
 
  62 enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
 
  63 #ifndef OBJECT_CREATION_MODE
 
  64 #define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
 
  66 enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
 
  68 int grafts_replace_parents = 1;
 
  69 int core_apply_sparse_checkout;
 
  70 int core_sparse_checkout_cone;
 
  71 int merge_log_config = -1;
 
  72 int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
 
  73 unsigned long pack_size_limit_cfg;
 
  74 enum log_refs_config log_all_ref_updates = LOG_REFS_UNSET;
 
  76 #ifndef PROTECT_HFS_DEFAULT
 
  77 #define PROTECT_HFS_DEFAULT 0
 
  79 int protect_hfs = PROTECT_HFS_DEFAULT;
 
  81 #ifndef PROTECT_NTFS_DEFAULT
 
  82 #define PROTECT_NTFS_DEFAULT 1
 
  84 int protect_ntfs = PROTECT_NTFS_DEFAULT;
 
  85 const char *core_fsmonitor;
 
  88  * The character that begins a commented line in user-editable file
 
  89  * that is subject to stripspace.
 
  91 char comment_line_char = '#';
 
  92 int auto_comment_line_char;
 
  94 /* Parallel index stat data preload? */
 
  95 int core_preload_index = 1;
 
  98  * This is a hack for test programs like test-dump-untracked-cache to
 
  99  * ensure that they do not modify the untracked cache when reading it.
 
 100  * Do not use it otherwise!
 
 102 int ignore_untracked_cache_config;
 
 104 /* This is set by setup_git_dir_gently() and/or git_default_config() */
 
 105 char *git_work_tree_cfg;
 
 107 static char *git_namespace;
 
 109 static char *super_prefix;
 
 112  * Repository-local GIT_* environment variables; see cache.h for details.
 
 114 const char * const local_repo_env[] = {
 
 115         ALTERNATE_DB_ENVIRONMENT,
 
 117         CONFIG_DATA_ENVIRONMENT,
 
 120         GIT_WORK_TREE_ENVIRONMENT,
 
 121         GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
 
 124         NO_REPLACE_OBJECTS_ENVIRONMENT,
 
 125         GIT_REPLACE_REF_BASE_ENVIRONMENT,
 
 126         GIT_PREFIX_ENVIRONMENT,
 
 127         GIT_SUPER_PREFIX_ENVIRONMENT,
 
 128         GIT_SHALLOW_FILE_ENVIRONMENT,
 
 129         GIT_COMMON_DIR_ENVIRONMENT,
 
 133 static char *expand_namespace(const char *raw_namespace)
 
 135         struct strbuf buf = STRBUF_INIT;
 
 136         struct strbuf **components, **c;
 
 138         if (!raw_namespace || !*raw_namespace)
 
 141         strbuf_addstr(&buf, raw_namespace);
 
 142         components = strbuf_split(&buf, '/');
 
 144         for (c = components; *c; c++)
 
 145                 if (strcmp((*c)->buf, "/") != 0)
 
 146                         strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 
 147         strbuf_list_free(components);
 
 148         if (check_refname_format(buf.buf, 0))
 
 149                 die(_("bad git namespace path \"%s\""), raw_namespace);
 
 150         strbuf_addch(&buf, '/');
 
 151         return strbuf_detach(&buf, NULL);
 
 155  * Wrapper of getenv() that returns a strdup value. This value is kept
 
 156  * in argv to be freed later.
 
 158 static const char *getenv_safe(struct argv_array *argv, const char *name)
 
 160         const char *value = getenv(name);
 
 165         argv_array_push(argv, value);
 
 166         return argv->argv[argv->argc - 1];
 
 169 void setup_git_env(const char *git_dir)
 
 171         const char *shallow_file;
 
 172         const char *replace_ref_base;
 
 173         struct set_gitdir_args args = { NULL };
 
 174         struct argv_array to_free = ARGV_ARRAY_INIT;
 
 176         args.commondir = getenv_safe(&to_free, GIT_COMMON_DIR_ENVIRONMENT);
 
 177         args.object_dir = getenv_safe(&to_free, DB_ENVIRONMENT);
 
 178         args.graft_file = getenv_safe(&to_free, GRAFT_ENVIRONMENT);
 
 179         args.index_file = getenv_safe(&to_free, INDEX_ENVIRONMENT);
 
 180         args.alternate_db = getenv_safe(&to_free, ALTERNATE_DB_ENVIRONMENT);
 
 181         repo_set_gitdir(the_repository, git_dir, &args);
 
 182         argv_array_clear(&to_free);
 
 184         if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 
 185                 read_replace_refs = 0;
 
 186         replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
 
 187         free(git_replace_ref_base);
 
 188         git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
 
 191         git_namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 
 192         shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
 
 194                 set_alternate_shallow_file(the_repository, shallow_file, 0);
 
 197 int is_bare_repository(void)
 
 199         /* if core.bare is not 'false', let's see if there is a work tree */
 
 200         return is_bare_repository_cfg && !get_git_work_tree();
 
 203 int have_git_dir(void)
 
 205         return startup_info->have_repository
 
 206                 || the_repository->gitdir;
 
 209 const char *get_git_dir(void)
 
 211         if (!the_repository->gitdir)
 
 212                 BUG("git environment hasn't been setup");
 
 213         return the_repository->gitdir;
 
 216 const char *get_git_common_dir(void)
 
 218         if (!the_repository->commondir)
 
 219                 BUG("git environment hasn't been setup");
 
 220         return the_repository->commondir;
 
 223 const char *get_git_namespace(void)
 
 226                 BUG("git environment hasn't been setup");
 
 227         return git_namespace;
 
 230 const char *strip_namespace(const char *namespaced_ref)
 
 233         if (skip_prefix(namespaced_ref, get_git_namespace(), &out))
 
 238 const char *get_super_prefix(void)
 
 240         static int initialized;
 
 242                 super_prefix = xstrdup_or_null(getenv(GIT_SUPER_PREFIX_ENVIRONMENT));
 
 248 static int git_work_tree_initialized;
 
 251  * Note.  This works only before you used a work tree.  This was added
 
 252  * primarily to support git-clone to work in a new repository it just
 
 253  * created, and is not meant to flip between different work trees.
 
 255 void set_git_work_tree(const char *new_work_tree)
 
 257         if (git_work_tree_initialized) {
 
 258                 new_work_tree = real_path(new_work_tree);
 
 259                 if (strcmp(new_work_tree, the_repository->worktree))
 
 260                         die("internal error: work tree has already been set\n"
 
 261                             "Current worktree: %s\nNew worktree: %s",
 
 262                             the_repository->worktree, new_work_tree);
 
 265         git_work_tree_initialized = 1;
 
 266         repo_set_worktree(the_repository, new_work_tree);
 
 269 const char *get_git_work_tree(void)
 
 271         return the_repository->worktree;
 
 274 char *get_object_directory(void)
 
 276         if (!the_repository->objects->odb)
 
 277                 BUG("git environment hasn't been setup");
 
 278         return the_repository->objects->odb->path;
 
 281 int odb_mkstemp(struct strbuf *temp_filename, const char *pattern)
 
 285          * we let the umask do its job, don't try to be more
 
 286          * restrictive except to remove write permission.
 
 289         git_path_buf(temp_filename, "objects/%s", pattern);
 
 290         fd = git_mkstemp_mode(temp_filename->buf, mode);
 
 295         /* some mkstemp implementations erase temp_filename on failure */
 
 296         git_path_buf(temp_filename, "objects/%s", pattern);
 
 297         safe_create_leading_directories(temp_filename->buf);
 
 298         return xmkstemp_mode(temp_filename->buf, mode);
 
 301 int odb_pack_keep(const char *name)
 
 305         fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 
 310         safe_create_leading_directories_const(name);
 
 311         return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 
 314 char *get_index_file(void)
 
 316         if (!the_repository->index_file)
 
 317                 BUG("git environment hasn't been setup");
 
 318         return the_repository->index_file;
 
 321 char *get_graft_file(struct repository *r)
 
 324                 BUG("git environment hasn't been setup");
 
 325         return r->graft_file;
 
 328 static void set_git_dir_1(const char *path)
 
 330         if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 
 331                 die(_("could not set GIT_DIR to '%s'"), path);
 
 335 static void update_relative_gitdir(const char *name,
 
 340         char *path = reparent_relative_path(old_cwd, new_cwd, get_git_dir());
 
 341         trace_printf_key(&trace_setup_key,
 
 342                          "setup: move $GIT_DIR to '%s'",
 
 348 void set_git_dir(const char *path)
 
 351         if (!is_absolute_path(path))
 
 352                 chdir_notify_register(NULL, update_relative_gitdir, NULL);
 
 355 const char *get_log_output_encoding(void)
 
 357         return git_log_output_encoding ? git_log_output_encoding
 
 358                 : get_commit_output_encoding();
 
 361 const char *get_commit_output_encoding(void)
 
 363         return git_commit_encoding ? git_commit_encoding : "UTF-8";
 
 366 static int the_shared_repository = PERM_UMASK;
 
 367 static int need_shared_repository_from_config = 1;
 
 369 void set_shared_repository(int value)
 
 371         the_shared_repository = value;
 
 372         need_shared_repository_from_config = 0;
 
 375 int get_shared_repository(void)
 
 377         if (need_shared_repository_from_config) {
 
 378                 const char *var = "core.sharedrepository";
 
 380                 if (!git_config_get_value(var, &value))
 
 381                         the_shared_repository = git_config_perm(var, value);
 
 382                 need_shared_repository_from_config = 0;
 
 384         return the_shared_repository;
 
 387 void reset_shared_repository(void)
 
 389         need_shared_repository_from_config = 1;
 
 392 int use_optional_locks(void)
 
 394         return git_env_bool(GIT_OPTIONAL_LOCKS_ENVIRONMENT, 1);
 
 397 int print_sha1_ellipsis(void)
 
 400          * Determine if the calling environment contains the variable
 
 401          * GIT_PRINT_SHA1_ELLIPSIS set to "yes".
 
 403         static int cached_result = -1; /* unknown */
 
 405         if (cached_result < 0) {
 
 406                 const char *v = getenv("GIT_PRINT_SHA1_ELLIPSIS");
 
 407                 cached_result = (v && !strcasecmp(v, "yes"));
 
 409         return cached_result;