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 trust_executable_bit = 1;
  15 int quote_path_fully = 1;
  16 int has_symlinks = 1;
  17 int assume_unchanged;
  18 int prefer_symlink_refs;
  19 int is_bare_repository_cfg = -1; /* unspecified */
  20 int log_all_ref_updates = -1; /* unspecified */
  21 int warn_ambiguous_refs = 1;
  22 int repository_format_version;
  23 const char *git_commit_encoding;
  24 const char *git_log_output_encoding;
  25 int shared_repository = PERM_UMASK;
  26 const char *apply_default_whitespace;
  27 int zlib_compression_level = Z_BEST_SPEED;
  28 int core_compression_level;
  29 int core_compression_seen;
  30 size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  31 size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  32 size_t delta_base_cache_limit = 16 * 1024 * 1024;
  33 char *pager_program;
  34 int pager_in_use;
  35 int pager_use_color = 1;
  36 int auto_crlf = 0;      /* 1: both ways, -1: only when adding git objects */
  37
  38 static const char *git_dir;
  39 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
  40
  41 static void setup_git_env(void)
  42 {
  43         git_dir = getenv(GIT_DIR_ENVIRONMENT);
  44         if (!git_dir)
  45                 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
  46         git_object_dir = getenv(DB_ENVIRONMENT);
  47         if (!git_object_dir) {
  48                 git_object_dir = xmalloc(strlen(git_dir) + 9);
  49                 sprintf(git_object_dir, "%s/objects", git_dir);
  50         }
  51         git_refs_dir = xmalloc(strlen(git_dir) + 6);
  52         sprintf(git_refs_dir, "%s/refs", git_dir);
  53         git_index_file = getenv(INDEX_ENVIRONMENT);
  54         if (!git_index_file) {
  55                 git_index_file = xmalloc(strlen(git_dir) + 7);
  56                 sprintf(git_index_file, "%s/index", git_dir);
  57         }
  58         git_graft_file = getenv(GRAFT_ENVIRONMENT);
  59         if (!git_graft_file)
  60                 git_graft_file = xstrdup(git_path("info/grafts"));
  61 }
  62
  63 int is_bare_repository(void)
  64 {
  65         const char *dir, *s;
  66         if (0 <= is_bare_repository_cfg)
  67                 return is_bare_repository_cfg;
  68
  69         dir = get_git_dir();
  70         if (!strcmp(dir, DEFAULT_GIT_DIR_ENVIRONMENT))
  71                 return 0;
  72         s = strrchr(dir, '/');
  73         return !s || strcmp(s + 1, DEFAULT_GIT_DIR_ENVIRONMENT);
  74 }
  75
  76 const char *get_git_dir(void)
  77 {
  78         if (!git_dir)
  79                 setup_git_env();
  80         return git_dir;
  81 }
  82
  83 char *get_object_directory(void)
  84 {
  85         if (!git_object_dir)
  86                 setup_git_env();
  87         return git_object_dir;
  88 }
  89
  90 char *get_refs_directory(void)
  91 {
  92         if (!git_refs_dir)
  93                 setup_git_env();
  94         return git_refs_dir;
  95 }
  96
  97 char *get_index_file(void)
  98 {
  99         if (!git_index_file)
 100                 setup_git_env();
 101         return git_index_file;
 102 }
 103
 104 char *get_graft_file(void)
 105 {
 106         if (!git_graft_file)
 107                 setup_git_env();
 108         return git_graft_file;
 109 }
 110
 111 int set_git_dir(const char *path)
 112 {
 113         if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 114                 return error("Could not set GIT_DIR to '%s'", path);
 115         setup_git_env();
 116         return 0;
 117 }