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 char *notes_ref_name;
  53 int grafts_replace_parents = 1;
  54
  55 /* Parallel index stat data preload? */
  56 int core_preload_index = 0;
  57
  58 /* This is set by setup_git_dir_gently() and/or git_default_config() */
  59 char *git_work_tree_cfg;
  60 static char *work_tree;
  61
  62 static const char *git_dir;
  63 static char *git_object_dir, *git_index_file, *git_refs_dir, *git_graft_file;
  64
  65 static void setup_git_env(void)
  66 {
  67         git_dir = getenv(GIT_DIR_ENVIRONMENT);
  68         if (!git_dir)
  69                 git_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
  70         if (!git_dir)
  71                 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
  72         git_object_dir = getenv(DB_ENVIRONMENT);
  73         if (!git_object_dir) {
  74                 git_object_dir = xmalloc(strlen(git_dir) + 9);
  75                 sprintf(git_object_dir, "%s/objects", git_dir);
  76         }
  77         git_refs_dir = xmalloc(strlen(git_dir) + 6);
  78         sprintf(git_refs_dir, "%s/refs", git_dir);
  79         git_index_file = getenv(INDEX_ENVIRONMENT);
  80         if (!git_index_file) {
  81                 git_index_file = xmalloc(strlen(git_dir) + 7);
  82                 sprintf(git_index_file, "%s/index", git_dir);
  83         }
  84         git_graft_file = getenv(GRAFT_ENVIRONMENT);
  85         if (!git_graft_file)
  86                 git_graft_file = git_pathdup("info/grafts");
  87         if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
  88                 read_replace_refs = 0;
  89 }
  90
  91 int is_bare_repository(void)
  92 {
  93         /* if core.bare is not 'false', let's see if there is a work tree */
  94         return is_bare_repository_cfg && !get_git_work_tree();
  95 }
  96
  97 int have_git_dir(void)
  98 {
  99         return !!git_dir;
 100 }
 101
 102 const char *get_git_dir(void)
 103 {
 104         if (!git_dir)
 105                 setup_git_env();
 106         return git_dir;
 107 }
 108
 109 static int git_work_tree_initialized;
 110
 111 /*
 112  * Note.  This works only before you used a work tree.  This was added
 113  * primarily to support git-clone to work in a new repository it just
 114  * created, and is not meant to flip between different work trees.
 115  */
 116 void set_git_work_tree(const char *new_work_tree)
 117 {
 118         if (is_bare_repository_cfg >= 0)
 119                 die("cannot set work tree after initialization");
 120         git_work_tree_initialized = 1;
 121         free(work_tree);
 122         work_tree = xstrdup(make_absolute_path(new_work_tree));
 123         is_bare_repository_cfg = 0;
 124 }
 125
 126 const char *get_git_work_tree(void)
 127 {
 128         if (!git_work_tree_initialized) {
 129                 work_tree = getenv(GIT_WORK_TREE_ENVIRONMENT);
 130                 /* core.bare = true overrides implicit and config work tree */
 131                 if (!work_tree && is_bare_repository_cfg < 1) {
 132                         work_tree = git_work_tree_cfg;
 133                         /* make_absolute_path also normalizes the path */
 134                         if (work_tree && !is_absolute_path(work_tree))
 135                                 work_tree = xstrdup(make_absolute_path(git_path("%s", work_tree)));
 136                 } else if (work_tree)
 137                         work_tree = xstrdup(make_absolute_path(work_tree));
 138                 git_work_tree_initialized = 1;
 139                 if (work_tree)
 140                         is_bare_repository_cfg = 0;
 141         }
 142         return work_tree;
 143 }
 144
 145 char *get_object_directory(void)
 146 {
 147         if (!git_object_dir)
 148                 setup_git_env();
 149         return git_object_dir;
 150 }
 151
 152 char *get_index_file(void)
 153 {
 154         if (!git_index_file)
 155                 setup_git_env();
 156         return git_index_file;
 157 }
 158
 159 char *get_graft_file(void)
 160 {
 161         if (!git_graft_file)
 162                 setup_git_env();
 163         return git_graft_file;
 164 }
 165
 166 int set_git_dir(const char *path)
 167 {
 168         if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 169                 return error("Could not set GIT_DIR to '%s'", path);
 170         setup_git_env();
 171         return 0;
 172 }