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 const char *pager_program;
  34 int pager_use_color = 1;
  35 const char *editor_program;
  36 const char *excludes_file;
  37 int auto_crlf = 0;      /* 1: both ways, -1: only when adding git objects */
  38 enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
  39 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  40 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  41 enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  42
  43 /* This is set by setup_git_dir_gently() and/or git_default_config() */
  44 char *git_work_tree_cfg;
  45 static const char *work_tree;
  46
  47 static const char *git_dir;
  48 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
  49
  50 static void setup_git_env(void)
  51 {
  52         git_dir = getenv(GIT_DIR_ENVIRONMENT);
  53         if (!git_dir)
  54                 git_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
  55         if (!git_dir)
  56                 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
  57         git_object_dir = getenv(DB_ENVIRONMENT);
  58         if (!git_object_dir) {
  59                 git_object_dir = xmalloc(strlen(git_dir) + 9);
  60                 sprintf(git_object_dir, "%s/objects", git_dir);
  61         }
  62         git_refs_dir = xmalloc(strlen(git_dir) + 6);
  63         sprintf(git_refs_dir, "%s/refs", git_dir);
  64         git_index_file = getenv(INDEX_ENVIRONMENT);
  65         if (!git_index_file) {
  66                 git_index_file = xmalloc(strlen(git_dir) + 7);
  67                 sprintf(git_index_file, "%s/index", git_dir);
  68         }
  69         git_graft_file = getenv(GRAFT_ENVIRONMENT);
  70         if (!git_graft_file)
  71                 git_graft_file = xstrdup(git_path("info/grafts"));
  72 }
  73
  74 int is_bare_repository(void)
  75 {
  76         /* if core.bare is not 'false', let's see if there is a work tree */
  77         return is_bare_repository_cfg && !get_git_work_tree();
  78 }
  79
  80 const char *get_git_dir(void)
  81 {
  82         if (!git_dir)
  83                 setup_git_env();
  84         return git_dir;
  85 }
  86
  87 const char *get_git_work_tree(void)
  88 {
  89         static int initialized = 0;
  90         if (!initialized) {
  91                 work_tree = getenv(GIT_WORK_TREE_ENVIRONMENT);
  92                 /* core.bare = true overrides implicit and config work tree */
  93                 if (!work_tree && is_bare_repository_cfg < 1) {
  94                         work_tree = git_work_tree_cfg;
  95                         /* make_absolute_path also normalizes the path */
  96                         if (work_tree && !is_absolute_path(work_tree))
  97                                 work_tree = xstrdup(make_absolute_path(git_path(work_tree)));
  98                 } else if (work_tree)
  99                         work_tree = xstrdup(make_absolute_path(work_tree));
 100                 initialized = 1;
 101                 if (work_tree)
 102                         is_bare_repository_cfg = 0;
 103         }
 104         return work_tree;
 105 }
 106
 107 char *get_object_directory(void)
 108 {
 109         if (!git_object_dir)
 110                 setup_git_env();
 111         return git_object_dir;
 112 }
 113
 114 char *get_refs_directory(void)
 115 {
 116         if (!git_refs_dir)
 117                 setup_git_env();
 118         return git_refs_dir;
 119 }
 120
 121 char *get_index_file(void)
 122 {
 123         if (!git_index_file)
 124                 setup_git_env();
 125         return git_index_file;
 126 }
 127
 128 char *get_graft_file(void)
 129 {
 130         if (!git_graft_file)
 131                 setup_git_env();
 132         return git_graft_file;
 133 }
 134
 135 int set_git_dir(const char *path)
 136 {
 137         if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 138                 return error("Could not set GIT_DIR to '%s'", path);
 139         setup_git_env();
 140         return 0;
 141 }