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 has_symlinks = 1;
  16 int assume_unchanged;
  17 int prefer_symlink_refs;
  18 int is_bare_repository_cfg = -1; /* unspecified */
  19 int log_all_ref_updates = -1; /* unspecified */
  20 int warn_ambiguous_refs = 1;
  21 int repository_format_version;
  22 const char *git_commit_encoding;
  23 const char *git_log_output_encoding;
  24 int shared_repository = PERM_UMASK;
  25 const char *apply_default_whitespace;
  26 int zlib_compression_level = Z_BEST_SPEED;
  27 int core_compression_level;
  28 int core_compression_seen;
  29 size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  30 size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  31 size_t delta_base_cache_limit = 16 * 1024 * 1024;
  32 int pager_in_use;
  33 int pager_use_color = 1;
  34 int auto_crlf = 0;      /* 1: both ways, -1: only when adding git objects */
  35
  36 static const char *git_dir;
  37 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
  38
  39 static void setup_git_env(void)
  40 {
  41         git_dir = getenv(GIT_DIR_ENVIRONMENT);
  42         if (!git_dir)
  43                 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
  44         git_object_dir = getenv(DB_ENVIRONMENT);
  45         if (!git_object_dir) {
  46                 git_object_dir = xmalloc(strlen(git_dir) + 9);
  47                 sprintf(git_object_dir, "%s/objects", git_dir);
  48         }
  49         git_refs_dir = xmalloc(strlen(git_dir) + 6);
  50         sprintf(git_refs_dir, "%s/refs", git_dir);
  51         git_index_file = getenv(INDEX_ENVIRONMENT);
  52         if (!git_index_file) {
  53                 git_index_file = xmalloc(strlen(git_dir) + 7);
  54                 sprintf(git_index_file, "%s/index", git_dir);
  55         }
  56         git_graft_file = getenv(GRAFT_ENVIRONMENT);
  57         if (!git_graft_file)
  58                 git_graft_file = xstrdup(git_path("info/grafts"));
  59 }
  60
  61 int is_bare_repository(void)
  62 {
  63         const char *dir, *s;
  64         if (0 <= is_bare_repository_cfg)
  65                 return is_bare_repository_cfg;
  66
  67         dir = get_git_dir();
  68         if (!strcmp(dir, DEFAULT_GIT_DIR_ENVIRONMENT))
  69                 return 0;
  70         s = strrchr(dir, '/');
  71         return !s || strcmp(s + 1, DEFAULT_GIT_DIR_ENVIRONMENT);
  72 }
  73
  74 const char *get_git_dir(void)
  75 {
  76         if (!git_dir)
  77                 setup_git_env();
  78         return git_dir;
  79 }
  80
  81 char *get_object_directory(void)
  82 {
  83         if (!git_object_dir)
  84                 setup_git_env();
  85         return git_object_dir;
  86 }
  87
  88 char *get_refs_directory(void)
  89 {
  90         if (!git_refs_dir)
  91                 setup_git_env();
  92         return git_refs_dir;
  93 }
  94
  95 char *get_index_file(void)
  96 {
  97         if (!git_index_file)
  98                 setup_git_env();
  99         return git_index_file;
 100 }
 101
 102 char *get_graft_file(void)
 103 {
 104         if (!git_graft_file)
 105                 setup_git_env();
 106         return git_graft_file;
 107 }