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
  12 char git_default_email[MAX_GITNAME];
  13 char git_default_name[MAX_GITNAME];
  14 int user_ident_explicitly_given;
  15 int trust_executable_bit = 1;
  16 int trust_ctime = 1;
  17 int has_symlinks = 1;
  18 int ignore_case;
  19 int assume_unchanged;
  20 int prefer_symlink_refs;
  21 int is_bare_repository_cfg = -1; /* unspecified */
  22 int log_all_ref_updates = -1; /* unspecified */
  23 int warn_ambiguous_refs = 1;
  24 int repository_format_version;
  25 const char *git_commit_encoding;
  26 const char *git_log_output_encoding;
  27 int shared_repository = PERM_UMASK;
  28 const char *apply_default_whitespace;
  29 const char *apply_default_ignorewhitespace;
  30 int zlib_compression_level = Z_BEST_SPEED;
  31 int core_compression_level;
  32 int core_compression_seen;
  33 int fsync_object_files;
  34 size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  35 size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  36 size_t delta_base_cache_limit = 16 * 1024 * 1024;
  37 const char *pager_program;
  38 int pager_use_color = 1;
  39 const char *editor_program;
  40 const char *excludes_file;
  41 enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
  42 int read_replace_refs = 1;
  43 enum eol eol = EOL_UNSET;
  44 enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
  45 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  46 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  47 enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  48 enum push_default_type push_default = PUSH_DEFAULT_MATCHING;
  49 #ifndef OBJECT_CREATION_MODE
  50 #define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
  51 #endif
  52 enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
  53 char *notes_ref_name;
  54 int grafts_replace_parents = 1;
  55 int core_apply_sparse_checkout;
  56 int merge_renormalize;
  57
  58 /* Parallel index stat data preload? */
  59 int core_preload_index = 0;
  60
  61 /* This is set by setup_git_dir_gently() and/or git_default_config() */
  62 char *git_work_tree_cfg;
  63 static char *work_tree;
  64
  65 static const char *git_dir;
  66 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
  67
  68 /*
  69  * Repository-local GIT_* environment variables
  70  * Remember to update local_repo_env_size in cache.h when
  71  * the size of the list changes
  72  */
  73 const char * const local_repo_env[LOCAL_REPO_ENV_SIZE + 1] = {
  74         ALTERNATE_DB_ENVIRONMENT,
  75         CONFIG_ENVIRONMENT,
  76         DB_ENVIRONMENT,
  77         GIT_DIR_ENVIRONMENT,
  78         GIT_WORK_TREE_ENVIRONMENT,
  79         GRAFT_ENVIRONMENT,
  80         INDEX_ENVIRONMENT,
  81         NO_REPLACE_OBJECTS_ENVIRONMENT,
  82         NULL
  83 };
  84
  85 static void setup_git_env(void)
  86 {
  87         git_dir = getenv(GIT_DIR_ENVIRONMENT);
  88         if (!git_dir)
  89                 git_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
  90         if (!git_dir)
  91                 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
  92         git_object_dir = getenv(DB_ENVIRONMENT);
  93         if (!git_object_dir) {
  94                 git_object_dir = xmalloc(strlen(git_dir) + 9);
  95                 sprintf(git_object_dir, "%s/objects", git_dir);
  96         }
  97         git_refs_dir = xmalloc(strlen(git_dir) + 6);
  98         sprintf(git_refs_dir, "%s/refs", git_dir);
  99         git_index_file = getenv(INDEX_ENVIRONMENT);
 100         if (!git_index_file) {
 101                 git_index_file = xmalloc(strlen(git_dir) + 7);
 102                 sprintf(git_index_file, "%s/index", git_dir);
 103         }
 104         git_graft_file = getenv(GRAFT_ENVIRONMENT);
 105         if (!git_graft_file)
 106                 git_graft_file = git_pathdup("info/grafts");
 107         if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 108                 read_replace_refs = 0;
 109 }
 110
 111 int is_bare_repository(void)
 112 {
 113         /* if core.bare is not 'false', let's see if there is a work tree */
 114         return is_bare_repository_cfg && !get_git_work_tree();
 115 }
 116
 117 int have_git_dir(void)
 118 {
 119         return !!git_dir;
 120 }
 121
 122 const char *get_git_dir(void)
 123 {
 124         if (!git_dir)
 125                 setup_git_env();
 126         return git_dir;
 127 }
 128
 129 static int git_work_tree_initialized;
 130
 131 /*
 132  * Note.  This works only before you used a work tree.  This was added
 133  * primarily to support git-clone to work in a new repository it just
 134  * created, and is not meant to flip between different work trees.
 135  */
 136 void set_git_work_tree(const char *new_work_tree)
 137 {
 138         if (is_bare_repository_cfg >= 0)
 139                 die("cannot set work tree after initialization");
 140         git_work_tree_initialized = 1;
 141         free(work_tree);
 142         work_tree = xstrdup(make_absolute_path(new_work_tree));
 143         is_bare_repository_cfg = 0;
 144 }
 145
 146 const char *get_git_work_tree(void)
 147 {
 148         if (!git_work_tree_initialized) {
 149                 work_tree = getenv(GIT_WORK_TREE_ENVIRONMENT);
 150                 /* core.bare = true overrides implicit and config work tree */
 151                 if (!work_tree && is_bare_repository_cfg < 1) {
 152                         work_tree = git_work_tree_cfg;
 153                         /* make_absolute_path also normalizes the path */
 154                         if (work_tree && !is_absolute_path(work_tree))
 155                                 work_tree = xstrdup(make_absolute_path(git_path("%s", work_tree)));
 156                 } else if (work_tree)
 157                         work_tree = xstrdup(make_absolute_path(work_tree));
 158                 git_work_tree_initialized = 1;
 159                 if (work_tree)
 160                         is_bare_repository_cfg = 0;
 161         }
 162         return work_tree;
 163 }
 164
 165 char *get_object_directory(void)
 166 {
 167         if (!git_object_dir)
 168                 setup_git_env();
 169         return git_object_dir;
 170 }
 171
 172 char *get_index_file(void)
 173 {
 174         if (!git_index_file)
 175                 setup_git_env();
 176         return git_index_file;
 177 }
 178
 179 char *get_graft_file(void)
 180 {
 181         if (!git_graft_file)
 182                 setup_git_env();
 183         return git_graft_file;
 184 }
 185
 186 int set_git_dir(const char *path)
 187 {
 188         if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 189                 return error("Could not set GIT_DIR to '%s'", path);
 190         setup_git_env();
 191         return 0;
 192 }