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 enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
  42 int read_replace_refs = 1;
  43 enum eol eol = EOL_UNSET;
  44 enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
  45 unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  46 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  47 enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  48 enum push_default_type push_default = PUSH_DEFAULT_MATCHING;
  49 #ifndef OBJECT_CREATION_MODE
  50 #define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
  51 #endif
  52 enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
  53 char *notes_ref_name;
  54 int grafts_replace_parents = 1;
  55 int core_apply_sparse_checkout;
  56
  57 /* Parallel index stat data preload? */
  58 int core_preload_index = 0;
  59
  60 /* This is set by setup_git_dir_gently() and/or git_default_config() */
  61 char *git_work_tree_cfg;
  62 static char *work_tree;
  63
  64 static const char *git_dir;
  65 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
  66
  67 /*
  68  * Repository-local GIT_* environment variables
  69  * Remember to update local_repo_env_size in cache.h when
  70  * the size of the list changes
  71  */
  72 const char * const local_repo_env[LOCAL_REPO_ENV_SIZE + 1] = {
  73         ALTERNATE_DB_ENVIRONMENT,
  74         CONFIG_ENVIRONMENT,
  75         DB_ENVIRONMENT,
  76         GIT_DIR_ENVIRONMENT,
  77         GIT_WORK_TREE_ENVIRONMENT,
  78         GRAFT_ENVIRONMENT,
  79         INDEX_ENVIRONMENT,
  80         NO_REPLACE_OBJECTS_ENVIRONMENT,
  81         NULL
  82 };
  83
  84 static void setup_git_env(void)
  85 {
  86         git_dir = getenv(GIT_DIR_ENVIRONMENT);
  87         if (!git_dir)
  88                 git_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
  89         if (!git_dir)
  90                 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
  91         git_object_dir = getenv(DB_ENVIRONMENT);
  92         if (!git_object_dir) {
  93                 git_object_dir = xmalloc(strlen(git_dir) + 9);
  94                 sprintf(git_object_dir, "%s/objects", git_dir);
  95         }
  96         git_refs_dir = xmalloc(strlen(git_dir) + 6);
  97         sprintf(git_refs_dir, "%s/refs", git_dir);
  98         git_index_file = getenv(INDEX_ENVIRONMENT);
  99         if (!git_index_file) {
 100                 git_index_file = xmalloc(strlen(git_dir) + 7);
 101                 sprintf(git_index_file, "%s/index", git_dir);
 102         }
 103         git_graft_file = getenv(GRAFT_ENVIRONMENT);
 104         if (!git_graft_file)
 105                 git_graft_file = git_pathdup("info/grafts");
 106         if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 107                 read_replace_refs = 0;
 108 }
 109
 110 int is_bare_repository(void)
 111 {
 112         /* if core.bare is not 'false', let's see if there is a work tree */
 113         return is_bare_repository_cfg && !get_git_work_tree();
 114 }
 115
 116 int have_git_dir(void)
 117 {
 118         return !!git_dir;
 119 }
 120
 121 const char *get_git_dir(void)
 122 {
 123         if (!git_dir)
 124                 setup_git_env();
 125         return git_dir;
 126 }
 127
 128 static int git_work_tree_initialized;
 129
 130 /*
 131  * Note.  This works only before you used a work tree.  This was added
 132  * primarily to support git-clone to work in a new repository it just
 133  * created, and is not meant to flip between different work trees.
 134  */
 135 void set_git_work_tree(const char *new_work_tree)
 136 {
 137         if (is_bare_repository_cfg >= 0)
 138                 die("cannot set work tree after initialization");
 139         git_work_tree_initialized = 1;
 140         free(work_tree);
 141         work_tree = xstrdup(make_absolute_path(new_work_tree));
 142         is_bare_repository_cfg = 0;
 143 }
 144
 145 const char *get_git_work_tree(void)
 146 {
 147         if (!git_work_tree_initialized) {
 148                 work_tree = getenv(GIT_WORK_TREE_ENVIRONMENT);
 149                 /* core.bare = true overrides implicit and config work tree */
 150                 if (!work_tree && is_bare_repository_cfg < 1) {
 151                         work_tree = git_work_tree_cfg;
 152                         /* make_absolute_path also normalizes the path */
 153                         if (work_tree && !is_absolute_path(work_tree))
 154                                 work_tree = xstrdup(make_absolute_path(git_path("%s", work_tree)));
 155                 } else if (work_tree)
 156                         work_tree = xstrdup(make_absolute_path(work_tree));
 157                 git_work_tree_initialized = 1;
 158                 if (work_tree)
 159                         is_bare_repository_cfg = 0;
 160         }
 161         return work_tree;
 162 }
 163
 164 char *get_object_directory(void)
 165 {
 166         if (!git_object_dir)
 167                 setup_git_env();
 168         return git_object_dir;
 169 }
 170
 171 char *get_index_file(void)
 172 {
 173         if (!git_index_file)
 174                 setup_git_env();
 175         return git_index_file;
 176 }
 177
 178 char *get_graft_file(void)
 179 {
 180         if (!git_graft_file)
 181                 setup_git_env();
 182         return git_graft_file;
 183 }
 184
 185 int set_git_dir(const char *path)
 186 {
 187         if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 188                 return error("Could not set GIT_DIR to '%s'", path);
 189         setup_git_env();
 190         return 0;
 191 }