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 char *editor_program;
  37 int auto_crlf = 0;      /* 1: both ways, -1: only when adding git objects */
  38
  39 /* This is set by setup_git_dir_gently() and/or git_default_config() */
  40 char *git_work_tree_cfg;
  41 static const char *work_tree;
  42
  43 static const char *git_dir;
  44 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
  45
  46 static void setup_git_env(void)
  47 {
  48         git_dir = getenv(GIT_DIR_ENVIRONMENT);
  49         if (!git_dir)
  50                 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
  51         git_object_dir = getenv(DB_ENVIRONMENT);
  52         if (!git_object_dir) {
  53                 git_object_dir = xmalloc(strlen(git_dir) + 9);
  54                 sprintf(git_object_dir, "%s/objects", git_dir);
  55         }
  56         git_refs_dir = xmalloc(strlen(git_dir) + 6);
  57         sprintf(git_refs_dir, "%s/refs", git_dir);
  58         git_index_file = getenv(INDEX_ENVIRONMENT);
  59         if (!git_index_file) {
  60                 git_index_file = xmalloc(strlen(git_dir) + 7);
  61                 sprintf(git_index_file, "%s/index", git_dir);
  62         }
  63         git_graft_file = getenv(GRAFT_ENVIRONMENT);
  64         if (!git_graft_file)
  65                 git_graft_file = xstrdup(git_path("info/grafts"));
  66 }
  67
  68 int is_bare_repository(void)
  69 {
  70         /* if core.bare is not 'false', let's see if there is a work tree */
  71         return is_bare_repository_cfg && !get_git_work_tree();
  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 const char *get_git_work_tree(void)
  82 {
  83         static int initialized = 0;
  84         if (!initialized) {
  85                 work_tree = getenv(GIT_WORK_TREE_ENVIRONMENT);
  86                 /* core.bare = true overrides implicit and config work tree */
  87                 if (!work_tree && is_bare_repository_cfg < 1) {
  88                         work_tree = git_work_tree_cfg;
  89                         /* make_absolute_path also normalizes the path */
  90                         if (work_tree && !is_absolute_path(work_tree))
  91                                 work_tree = xstrdup(make_absolute_path(git_path(work_tree)));
  92                 } else if (work_tree)
  93                         work_tree = xstrdup(make_absolute_path(work_tree));
  94                 initialized = 1;
  95                 if (work_tree)
  96                         is_bare_repository_cfg = 0;
  97         }
  98         return work_tree;
  99 }
 100
 101 char *get_object_directory(void)
 102 {
 103         if (!git_object_dir)
 104                 setup_git_env();
 105         return git_object_dir;
 106 }
 107
 108 char *get_refs_directory(void)
 109 {
 110         if (!git_refs_dir)
 111                 setup_git_env();
 112         return git_refs_dir;
 113 }
 114
 115 char *get_index_file(void)
 116 {
 117         if (!git_index_file)
 118                 setup_git_env();
 119         return git_index_file;
 120 }
 121
 122 char *get_graft_file(void)
 123 {
 124         if (!git_graft_file)
 125                 setup_git_env();
 126         return git_graft_file;
 127 }
 128
 129 int set_git_dir(const char *path)
 130 {
 131         if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 132                 return error("Could not set GIT_DIR to '%s'", path);
 133         setup_git_env();
 134         return 0;
 135 }