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 use_legacy_headers = 1;
  15 int trust_executable_bit = 1;
  16 int assume_unchanged;
  17 int prefer_symlink_refs;
  18 int log_all_ref_updates;
  19 int warn_ambiguous_refs = 1;
  20 int repository_format_version;
  21 char *git_commit_encoding;
  22 char *git_log_output_encoding;
  23 int shared_repository = PERM_UMASK;
  24 const char *apply_default_whitespace;
  25 int zlib_compression_level = Z_DEFAULT_COMPRESSION;
  26 size_t packed_git_window_size = 32 * 1024 * 1024;
  27 size_t packed_git_limit = 256 * 1024 * 1024;
  28 int pager_in_use;
  29 int pager_use_color = 1;
  30
  31 static const char *git_dir;
  32 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
  33
  34 static void setup_git_env(void)
  35 {
  36         git_dir = getenv(GIT_DIR_ENVIRONMENT);
  37         if (!git_dir)
  38                 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
  39         git_object_dir = getenv(DB_ENVIRONMENT);
  40         if (!git_object_dir) {
  41                 git_object_dir = xmalloc(strlen(git_dir) + 9);
  42                 sprintf(git_object_dir, "%s/objects", git_dir);
  43         }
  44         git_refs_dir = xmalloc(strlen(git_dir) + 6);
  45         sprintf(git_refs_dir, "%s/refs", git_dir);
  46         git_index_file = getenv(INDEX_ENVIRONMENT);
  47         if (!git_index_file) {
  48                 git_index_file = xmalloc(strlen(git_dir) + 7);
  49                 sprintf(git_index_file, "%s/index", git_dir);
  50         }
  51         git_graft_file = getenv(GRAFT_ENVIRONMENT);
  52         if (!git_graft_file)
  53                 git_graft_file = xstrdup(git_path("info/grafts"));
  54         log_all_ref_updates = !is_bare_git_dir(git_dir);
  55 }
  56
  57 int is_bare_git_dir (const char *dir)
  58 {
  59         const char *s;
  60         if (!strcmp(dir, DEFAULT_GIT_DIR_ENVIRONMENT))
  61                 return 0;
  62         s = strrchr(dir, '/');
  63         return !s || strcmp(s + 1, DEFAULT_GIT_DIR_ENVIRONMENT);
  64 }
  65
  66 const char *get_git_dir(void)
  67 {
  68         if (!git_dir)
  69                 setup_git_env();
  70         return git_dir;
  71 }
  72
  73 char *get_object_directory(void)
  74 {
  75         if (!git_object_dir)
  76                 setup_git_env();
  77         return git_object_dir;
  78 }
  79
  80 char *get_refs_directory(void)
  81 {
  82         if (!git_refs_dir)
  83                 setup_git_env();
  84         return git_refs_dir;
  85 }
  86
  87 char *get_index_file(void)
  88 {
  89         if (!git_index_file)
  90                 setup_git_env();
  91         return git_index_file;
  92 }
  93
  94 char *get_graft_file(void)
  95 {
  96         if (!git_graft_file)
  97                 setup_git_env();
  98         return git_graft_file;
  99 }
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