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 /* This is set by setup_git_dir_gently() and/or git_default_config() */
  39 char *git_work_tree_cfg;
  40 static const char *work_tree;
  41
  42 static const char *git_dir;
  43 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
  44
  45 static void setup_git_env(void)
  46 {
  47         git_dir = getenv(GIT_DIR_ENVIRONMENT);
  48         if (!git_dir)
  49                 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
  50         git_object_dir = getenv(DB_ENVIRONMENT);
  51         if (!git_object_dir) {
  52                 git_object_dir = xmalloc(strlen(git_dir) + 9);
  53                 sprintf(git_object_dir, "%s/objects", git_dir);
  54         }
  55         git_refs_dir = xmalloc(strlen(git_dir) + 6);
  56         sprintf(git_refs_dir, "%s/refs", git_dir);
  57         git_index_file = getenv(INDEX_ENVIRONMENT);
  58         if (!git_index_file) {
  59                 git_index_file = xmalloc(strlen(git_dir) + 7);
  60                 sprintf(git_index_file, "%s/index", git_dir);
  61         }
  62         git_graft_file = getenv(GRAFT_ENVIRONMENT);
  63         if (!git_graft_file)
  64                 git_graft_file = xstrdup(git_path("info/grafts"));
  65 }
  66
  67 int is_bare_repository(void)
  68 {
  69         /* if core.bare is not 'false', let's see if there is a work tree */
  70         return is_bare_repository_cfg && !get_git_work_tree();
  71 }
  72
  73 const char *get_git_dir(void)
  74 {
  75         if (!git_dir)
  76                 setup_git_env();
  77         return git_dir;
  78 }
  79
  80 const char *get_git_work_tree(void)
  81 {
  82         static int initialized = 0;
  83         if (!initialized) {
  84                 work_tree = getenv(GIT_WORK_TREE_ENVIRONMENT);
  85                 /* core.bare = true overrides implicit and config work tree */
  86                 if (!work_tree && is_bare_repository_cfg < 1) {
  87                         work_tree = git_work_tree_cfg;
  88                         /* make_absolute_path also normalizes the path */
  89                         if (work_tree && !is_absolute_path(work_tree))
  90                                 work_tree = xstrdup(make_absolute_path(git_path(work_tree)));
  91                 } else if (work_tree)
  92                         work_tree = xstrdup(make_absolute_path(work_tree));
  93                 initialized = 1;
  94                 if (work_tree)
  95                         is_bare_repository_cfg = 0;
  96         }
  97         return work_tree;
  98 }
  99
 100 char *get_object_directory(void)
 101 {
 102         if (!git_object_dir)
 103                 setup_git_env();
 104         return git_object_dir;
 105 }
 106
 107 char *get_refs_directory(void)
 108 {
 109         if (!git_refs_dir)
 110                 setup_git_env();
 111         return git_refs_dir;
 112 }
 113
 114 char *get_index_file(void)
 115 {
 116         if (!git_index_file)
 117                 setup_git_env();
 118         return git_index_file;
 119 }
 120
 121 char *get_graft_file(void)
 122 {
 123         if (!git_graft_file)
 124                 setup_git_env();
 125         return git_graft_file;
 126 }
 127
 128 int set_git_dir(const char *path)
 129 {
 130         if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 131                 return error("Could not set GIT_DIR to '%s'", path);
 132         setup_git_env();
 133         return 0;
 134 }