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 user_ident_explicitly_given;
  15 int trust_executable_bit = 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 int fsync_object_files;
  32 size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  33 size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  34 size_t delta_base_cache_limit = 16 * 1024 * 1024;
  35 const char *pager_program;
  36 int pager_use_color = 1;
  37 const char *editor_program;
  38 const char *excludes_file;
  39 int auto_crlf = 0;      /* 1: both ways, -1: only when adding git objects */
  40 enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
  41 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  42 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  43 enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  44
  45 /* This is set by setup_git_dir_gently() and/or git_default_config() */
  46 char *git_work_tree_cfg;
  47 static char *work_tree;
  48
  49 static const char *git_dir;
  50 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
  51
  52 static void setup_git_env(void)
  53 {
  54         git_dir = getenv(GIT_DIR_ENVIRONMENT);
  55         if (!git_dir)
  56                 git_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
  57         if (!git_dir)
  58                 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
  59         git_object_dir = getenv(DB_ENVIRONMENT);
  60         if (!git_object_dir) {
  61                 git_object_dir = xmalloc(strlen(git_dir) + 9);
  62                 sprintf(git_object_dir, "%s/objects", git_dir);
  63         }
  64         git_refs_dir = xmalloc(strlen(git_dir) + 6);
  65         sprintf(git_refs_dir, "%s/refs", git_dir);
  66         git_index_file = getenv(INDEX_ENVIRONMENT);
  67         if (!git_index_file) {
  68                 git_index_file = xmalloc(strlen(git_dir) + 7);
  69                 sprintf(git_index_file, "%s/index", git_dir);
  70         }
  71         git_graft_file = getenv(GRAFT_ENVIRONMENT);
  72         if (!git_graft_file)
  73                 git_graft_file = xstrdup(git_path("info/grafts"));
  74 }
  75
  76 int is_bare_repository(void)
  77 {
  78         /* if core.bare is not 'false', let's see if there is a work tree */
  79         return is_bare_repository_cfg && !get_git_work_tree();
  80 }
  81
  82 const char *get_git_dir(void)
  83 {
  84         if (!git_dir)
  85                 setup_git_env();
  86         return git_dir;
  87 }
  88
  89 static int git_work_tree_initialized;
  90
  91 /*
  92  * Note.  This works only before you used a work tree.  This was added
  93  * primarily to support git-clone to work in a new repository it just
  94  * created, and is not meant to flip between different work trees.
  95  */
  96 void set_git_work_tree(const char *new_work_tree)
  97 {
  98         if (is_bare_repository_cfg >= 0)
  99                 die("cannot set work tree after initialization");
 100         git_work_tree_initialized = 1;
 101         free(work_tree);
 102         work_tree = xstrdup(make_absolute_path(new_work_tree));
 103         is_bare_repository_cfg = 0;
 104 }
 105
 106 const char *get_git_work_tree(void)
 107 {
 108         if (!git_work_tree_initialized) {
 109                 work_tree = getenv(GIT_WORK_TREE_ENVIRONMENT);
 110                 /* core.bare = true overrides implicit and config work tree */
 111                 if (!work_tree && is_bare_repository_cfg < 1) {
 112                         work_tree = git_work_tree_cfg;
 113                         /* make_absolute_path also normalizes the path */
 114                         if (work_tree && !is_absolute_path(work_tree))
 115                                 work_tree = xstrdup(make_absolute_path(git_path(work_tree)));
 116                 } else if (work_tree)
 117                         work_tree = xstrdup(make_absolute_path(work_tree));
 118                 git_work_tree_initialized = 1;
 119                 if (work_tree)
 120                         is_bare_repository_cfg = 0;
 121         }
 122         return work_tree;
 123 }
 124
 125 char *get_object_directory(void)
 126 {
 127         if (!git_object_dir)
 128                 setup_git_env();
 129         return git_object_dir;
 130 }
 131
 132 char *get_index_file(void)
 133 {
 134         if (!git_index_file)
 135                 setup_git_env();
 136         return git_index_file;
 137 }
 138
 139 char *get_graft_file(void)
 140 {
 141         if (!git_graft_file)
 142                 setup_git_env();
 143         return git_graft_file;
 144 }
 145
 146 int set_git_dir(const char *path)
 147 {
 148         if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 149                 return error("Could not set GIT_DIR to '%s'", path);
 150         setup_git_env();
 151         return 0;
 152 }