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 trust_ctime = 1;
  17 int has_symlinks = 1;
  18 int ignore_case;
  19 int assume_unchanged;
  20 int prefer_symlink_refs;
  21 int is_bare_repository_cfg = -1; /* unspecified */
  22 int log_all_ref_updates = -1; /* unspecified */
  23 int warn_ambiguous_refs = 1;
  24 int repository_format_version;
  25 const char *git_commit_encoding;
  26 const char *git_log_output_encoding;
  27 int shared_repository = PERM_UMASK;
  28 const char *apply_default_whitespace;
  29 const char *apply_default_ignorewhitespace;
  30 int zlib_compression_level = Z_BEST_SPEED;
  31 int core_compression_level;
  32 int core_compression_seen;
  33 int fsync_object_files;
  34 size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  35 size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  36 size_t delta_base_cache_limit = 16 * 1024 * 1024;
  37 const char *pager_program;
  38 int pager_use_color = 1;
  39 const char *editor_program;
  40 const char *excludes_file;
  41 int auto_crlf = 0;      /* 1: both ways, -1: only when adding git objects */
  42 int read_replace_refs = 1;
  43 enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
  44 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  45 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  46 enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  47 enum push_default_type push_default = PUSH_DEFAULT_MATCHING;
  48 #ifndef OBJECT_CREATION_MODE
  49 #define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
  50 #endif
  51 enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
  52 int grafts_replace_parents = 1;
  53
  54 /* Parallel index stat data preload? */
  55 int core_preload_index = 0;
  56
  57 /* This is set by setup_git_dir_gently() and/or git_default_config() */
  58 char *git_work_tree_cfg;
  59 static char *work_tree;
  60
  61 static const char *git_dir;
  62 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
  63
  64 static void setup_git_env(void)
  65 {
  66         git_dir = getenv(GIT_DIR_ENVIRONMENT);
  67         if (!git_dir)
  68                 git_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
  69         if (!git_dir)
  70                 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
  71         git_object_dir = getenv(DB_ENVIRONMENT);
  72         if (!git_object_dir) {
  73                 git_object_dir = xmalloc(strlen(git_dir) + 9);
  74                 sprintf(git_object_dir, "%s/objects", git_dir);
  75         }
  76         git_refs_dir = xmalloc(strlen(git_dir) + 6);
  77         sprintf(git_refs_dir, "%s/refs", git_dir);
  78         git_index_file = getenv(INDEX_ENVIRONMENT);
  79         if (!git_index_file) {
  80                 git_index_file = xmalloc(strlen(git_dir) + 7);
  81                 sprintf(git_index_file, "%s/index", git_dir);
  82         }
  83         git_graft_file = getenv(GRAFT_ENVIRONMENT);
  84         if (!git_graft_file)
  85                 git_graft_file = git_pathdup("info/grafts");
  86 }
  87
  88 int is_bare_repository(void)
  89 {
  90         /* if core.bare is not 'false', let's see if there is a work tree */
  91         return is_bare_repository_cfg && !get_git_work_tree();
  92 }
  93
  94 int have_git_dir(void)
  95 {
  96         return !!git_dir;
  97 }
  98
  99 const char *get_git_dir(void)
 100 {
 101         if (!git_dir)
 102                 setup_git_env();
 103         return git_dir;
 104 }
 105
 106 static int git_work_tree_initialized;
 107
 108 /*
 109  * Note.  This works only before you used a work tree.  This was added
 110  * primarily to support git-clone to work in a new repository it just
 111  * created, and is not meant to flip between different work trees.
 112  */
 113 void set_git_work_tree(const char *new_work_tree)
 114 {
 115         if (is_bare_repository_cfg >= 0)
 116                 die("cannot set work tree after initialization");
 117         git_work_tree_initialized = 1;
 118         free(work_tree);
 119         work_tree = xstrdup(make_absolute_path(new_work_tree));
 120         is_bare_repository_cfg = 0;
 121 }
 122
 123 const char *get_git_work_tree(void)
 124 {
 125         if (!git_work_tree_initialized) {
 126                 work_tree = getenv(GIT_WORK_TREE_ENVIRONMENT);
 127                 /* core.bare = true overrides implicit and config work tree */
 128                 if (!work_tree && is_bare_repository_cfg < 1) {
 129                         work_tree = git_work_tree_cfg;
 130                         /* make_absolute_path also normalizes the path */
 131                         if (work_tree && !is_absolute_path(work_tree))
 132                                 work_tree = xstrdup(make_absolute_path(git_path("%s", work_tree)));
 133                 } else if (work_tree)
 134                         work_tree = xstrdup(make_absolute_path(work_tree));
 135                 git_work_tree_initialized = 1;
 136                 if (work_tree)
 137                         is_bare_repository_cfg = 0;
 138         }
 139         return work_tree;
 140 }
 141
 142 char *get_object_directory(void)
 143 {
 144         if (!git_object_dir)
 145                 setup_git_env();
 146         return git_object_dir;
 147 }
 148
 149 char *get_index_file(void)
 150 {
 151         if (!git_index_file)
 152                 setup_git_env();
 153         return git_index_file;
 154 }
 155
 156 char *get_graft_file(void)
 157 {
 158         if (!git_graft_file)
 159                 setup_git_env();
 160         return git_graft_file;
 161 }
 162
 163 int set_git_dir(const char *path)
 164 {
 165         if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 166                 return error("Could not set GIT_DIR to '%s'", path);
 167         setup_git_env();
 168         return 0;
 169 }