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