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 int zlib_compression_level = Z_BEST_SPEED;
  30 int core_compression_level;
  31 int core_compression_seen;
  32 int fsync_object_files;
  33 size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  34 size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  35 size_t delta_base_cache_limit = 16 * 1024 * 1024;
  36 const char *pager_program;
  37 int pager_use_color = 1;
  38 const char *editor_program;
  39 const char *excludes_file;
  40 int auto_crlf = 0;      /* 1: both ways, -1: only when adding git objects */
  41 enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
  42 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  43 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  44 enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  45 enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
  46 #ifndef OBJECT_CREATION_MODE
  47 #define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
  48 #endif
  49 enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
  50
  51 /* Parallel index stat data preload? */
  52 int core_preload_index = 0;
  53
  54 /* This is set by setup_git_dir_gently() and/or git_default_config() */
  55 char *git_work_tree_cfg;
  56 static char *work_tree;
  57
  58 static const char *git_dir;
  59 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
  60
  61 static void setup_git_env(void)
  62 {
  63         git_dir = getenv(GIT_DIR_ENVIRONMENT);
  64         if (!git_dir)
  65                 git_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
  66         if (!git_dir)
  67                 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
  68         git_object_dir = getenv(DB_ENVIRONMENT);
  69         if (!git_object_dir) {
  70                 git_object_dir = xmalloc(strlen(git_dir) + 9);
  71                 sprintf(git_object_dir, "%s/objects", git_dir);
  72         }
  73         git_refs_dir = xmalloc(strlen(git_dir) + 6);
  74         sprintf(git_refs_dir, "%s/refs", git_dir);
  75         git_index_file = getenv(INDEX_ENVIRONMENT);
  76         if (!git_index_file) {
  77                 git_index_file = xmalloc(strlen(git_dir) + 7);
  78                 sprintf(git_index_file, "%s/index", git_dir);
  79         }
  80         git_graft_file = getenv(GRAFT_ENVIRONMENT);
  81         if (!git_graft_file)
  82                 git_graft_file = git_pathdup("info/grafts");
  83 }
  84
  85 int is_bare_repository(void)
  86 {
  87         /* if core.bare is not 'false', let's see if there is a work tree */
  88         return is_bare_repository_cfg && !get_git_work_tree();
  89 }
  90
  91 int have_git_dir(void)
  92 {
  93         return !!git_dir;
  94 }
  95
  96 const char *get_git_dir(void)
  97 {
  98         if (!git_dir)
  99                 setup_git_env();
 100         return git_dir;
 101 }
 102
 103 static int git_work_tree_initialized;
 104
 105 /*
 106  * Note.  This works only before you used a work tree.  This was added
 107  * primarily to support git-clone to work in a new repository it just
 108  * created, and is not meant to flip between different work trees.
 109  */
 110 void set_git_work_tree(const char *new_work_tree)
 111 {
 112         if (is_bare_repository_cfg >= 0)
 113                 die("cannot set work tree after initialization");
 114         git_work_tree_initialized = 1;
 115         free(work_tree);
 116         work_tree = xstrdup(make_absolute_path(new_work_tree));
 117         is_bare_repository_cfg = 0;
 118 }
 119
 120 const char *get_git_work_tree(void)
 121 {
 122         if (!git_work_tree_initialized) {
 123                 work_tree = getenv(GIT_WORK_TREE_ENVIRONMENT);
 124                 /* core.bare = true overrides implicit and config work tree */
 125                 if (!work_tree && is_bare_repository_cfg < 1) {
 126                         work_tree = git_work_tree_cfg;
 127                         /* make_absolute_path also normalizes the path */
 128                         if (work_tree && !is_absolute_path(work_tree))
 129                                 work_tree = xstrdup(make_absolute_path(git_path("%s", work_tree)));
 130                 } else if (work_tree)
 131                         work_tree = xstrdup(make_absolute_path(work_tree));
 132                 git_work_tree_initialized = 1;
 133                 if (work_tree)
 134                         is_bare_repository_cfg = 0;
 135         }
 136         return work_tree;
 137 }
 138
 139 char *get_object_directory(void)
 140 {
 141         if (!git_object_dir)
 142                 setup_git_env();
 143         return git_object_dir;
 144 }
 145
 146 char *get_index_file(void)
 147 {
 148         if (!git_index_file)
 149                 setup_git_env();
 150         return git_index_file;
 151 }
 152
 153 char *get_graft_file(void)
 154 {
 155         if (!git_graft_file)
 156                 setup_git_env();
 157         return git_graft_file;
 158 }
 159
 160 int set_git_dir(const char *path)
 161 {
 162         if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 163                 return error("Could not set GIT_DIR to '%s'", path);
 164         setup_git_env();
 165         return 0;
 166 }