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