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 ignore_case;
  18 int assume_unchanged;
  19 int prefer_symlink_refs;
  20 int is_bare_repository_cfg = -1; /* unspecified */
  21 int log_all_ref_updates = -1; /* unspecified */
  22 int warn_ambiguous_refs = 1;
  23 int repository_format_version;
  24 const char *git_commit_encoding;
  25 const char *git_log_output_encoding;
  26 int shared_repository = PERM_UMASK;
  27 const char *apply_default_whitespace;
  28 int zlib_compression_level = Z_BEST_SPEED;
  29 int core_compression_level;
  30 int core_compression_seen;
  31 size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  32 size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  33 size_t delta_base_cache_limit = 16 * 1024 * 1024;
  34 const char *pager_program;
  35 int pager_use_color = 1;
  36 const char *editor_program;
  37 const char *excludes_file;
  38 int auto_crlf = 0;      /* 1: both ways, -1: only when adding git objects */
  39 enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
  40 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  41 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  42 enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  43
  44 /* This is set by setup_git_dir_gently() and/or git_default_config() */
  45 char *git_work_tree_cfg;
  46 static const char *work_tree;
  47
  48 static const char *git_dir;
  49 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
  50
  51 static void setup_git_env(void)
  52 {
  53         git_dir = getenv(GIT_DIR_ENVIRONMENT);
  54         if (!git_dir)
  55                 git_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
  56         if (!git_dir)
  57                 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
  58         git_object_dir = getenv(DB_ENVIRONMENT);
  59         if (!git_object_dir) {
  60                 git_object_dir = xmalloc(strlen(git_dir) + 9);
  61                 sprintf(git_object_dir, "%s/objects", git_dir);
  62         }
  63         git_refs_dir = xmalloc(strlen(git_dir) + 6);
  64         sprintf(git_refs_dir, "%s/refs", git_dir);
  65         git_index_file = getenv(INDEX_ENVIRONMENT);
  66         if (!git_index_file) {
  67                 git_index_file = xmalloc(strlen(git_dir) + 7);
  68                 sprintf(git_index_file, "%s/index", git_dir);
  69         }
  70         git_graft_file = getenv(GRAFT_ENVIRONMENT);
  71         if (!git_graft_file)
  72                 git_graft_file = xstrdup(git_path("info/grafts"));
  73 }
  74
  75 int is_bare_repository(void)
  76 {
  77         /* if core.bare is not 'false', let's see if there is a work tree */
  78         return is_bare_repository_cfg && !get_git_work_tree();
  79 }
  80
  81 const char *get_git_dir(void)
  82 {
  83         if (!git_dir)
  84                 setup_git_env();
  85         return git_dir;
  86 }
  87
  88 const char *get_git_work_tree(void)
  89 {
  90         static int initialized = 0;
  91         if (!initialized) {
  92                 work_tree = getenv(GIT_WORK_TREE_ENVIRONMENT);
  93                 /* core.bare = true overrides implicit and config work tree */
  94                 if (!work_tree && is_bare_repository_cfg < 1) {
  95                         work_tree = git_work_tree_cfg;
  96                         /* make_absolute_path also normalizes the path */
  97                         if (work_tree && !is_absolute_path(work_tree))
  98                                 work_tree = xstrdup(make_absolute_path(git_path(work_tree)));
  99                 } else if (work_tree)
 100                         work_tree = xstrdup(make_absolute_path(work_tree));
 101                 initialized = 1;
 102                 if (work_tree)
 103                         is_bare_repository_cfg = 0;
 104         }
 105         return work_tree;
 106 }
 107
 108 char *get_object_directory(void)
 109 {
 110         if (!git_object_dir)
 111                 setup_git_env();
 112         return git_object_dir;
 113 }
 114
 115 char *get_refs_directory(void)
 116 {
 117         if (!git_refs_dir)
 118                 setup_git_env();
 119         return git_refs_dir;
 120 }
 121
 122 char *get_index_file(void)
 123 {
 124         if (!git_index_file)
 125                 setup_git_env();
 126         return git_index_file;
 127 }
 128
 129 char *get_graft_file(void)
 130 {
 131         if (!git_graft_file)
 132                 setup_git_env();
 133         return git_graft_file;
 134 }
 135
 136 int set_git_dir(const char *path)
 137 {
 138         if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 139                 return error("Could not set GIT_DIR to '%s'", path);
 140         setup_git_env();
 141         return 0;
 142 }