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
  42 /* This is set by setup_git_dir_gently() and/or git_default_config() */
  43 char *git_work_tree_cfg;
  44 static char *work_tree;
  45
  46 static const char *git_dir;
  47 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
  48
  49 static void setup_git_env(void)
  50 {
  51         git_dir = getenv(GIT_DIR_ENVIRONMENT);
  52         if (!git_dir)
  53                 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
  54         git_object_dir = getenv(DB_ENVIRONMENT);
  55         if (!git_object_dir) {
  56                 git_object_dir = xmalloc(strlen(git_dir) + 9);
  57                 sprintf(git_object_dir, "%s/objects", git_dir);
  58         }
  59         git_refs_dir = xmalloc(strlen(git_dir) + 6);
  60         sprintf(git_refs_dir, "%s/refs", git_dir);
  61         git_index_file = getenv(INDEX_ENVIRONMENT);
  62         if (!git_index_file) {
  63                 git_index_file = xmalloc(strlen(git_dir) + 7);
  64                 sprintf(git_index_file, "%s/index", git_dir);
  65         }
  66         git_graft_file = getenv(GRAFT_ENVIRONMENT);
  67         if (!git_graft_file)
  68                 git_graft_file = xstrdup(git_path("info/grafts"));
  69 }
  70
  71 int is_bare_repository(void)
  72 {
  73         /* if core.bare is not 'false', let's see if there is a work tree */
  74         return is_bare_repository_cfg && !get_git_work_tree();
  75 }
  76
  77 const char *get_git_dir(void)
  78 {
  79         if (!git_dir)
  80                 setup_git_env();
  81         return git_dir;
  82 }
  83
  84 static int git_work_tree_initialized;
  85
  86 /*
  87  * Note.  This works only before you used a work tree.  This was added
  88  * primarily to support git-clone to work in a new repository it just
  89  * created, and is not meant to flip between different work trees.
  90  */
  91 void set_git_work_tree(const char *new_work_tree)
  92 {
  93         if (is_bare_repository_cfg >= 0)
  94                 die("cannot set work tree after initialization");
  95         git_work_tree_initialized = 1;
  96         free(work_tree);
  97         work_tree = xstrdup(make_absolute_path(new_work_tree));
  98         is_bare_repository_cfg = 0;
  99 }
 100
 101 const char *get_git_work_tree(void)
 102 {
 103         if (!git_work_tree_initialized) {
 104                 work_tree = getenv(GIT_WORK_TREE_ENVIRONMENT);
 105                 /* core.bare = true overrides implicit and config work tree */
 106                 if (!work_tree && is_bare_repository_cfg < 1) {
 107                         work_tree = git_work_tree_cfg;
 108                         /* make_absolute_path also normalizes the path */
 109                         if (work_tree && !is_absolute_path(work_tree))
 110                                 work_tree = xstrdup(make_absolute_path(git_path(work_tree)));
 111                 } else if (work_tree)
 112                         work_tree = xstrdup(make_absolute_path(work_tree));
 113                 git_work_tree_initialized = 1;
 114                 if (work_tree)
 115                         is_bare_repository_cfg = 0;
 116         }
 117         return work_tree;
 118 }
 119
 120 char *get_object_directory(void)
 121 {
 122         if (!git_object_dir)
 123                 setup_git_env();
 124         return git_object_dir;
 125 }
 126
 127 char *get_refs_directory(void)
 128 {
 129         if (!git_refs_dir)
 130                 setup_git_env();
 131         return git_refs_dir;
 132 }
 133
 134 char *get_index_file(void)
 135 {
 136         if (!git_index_file)
 137                 setup_git_env();
 138         return git_index_file;
 139 }
 140
 141 char *get_graft_file(void)
 142 {
 143         if (!git_graft_file)
 144                 setup_git_env();
 145         return git_graft_file;
 146 }
 147
 148 int set_git_dir(const char *path)
 149 {
 150         if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 151                 return error("Could not set GIT_DIR to '%s'", path);
 152         setup_git_env();
 153         return 0;
 154 }