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 assume_unchanged = 0;
  16 int prefer_symlink_refs = 0;
  17 int log_all_ref_updates = 0;
  18 int warn_ambiguous_refs = 1;
  19 int repository_format_version = 0;
  20 char git_commit_encoding[MAX_ENCODING_LENGTH] = "utf-8";
  21 int shared_repository = PERM_UMASK;
  22 const char *apply_default_whitespace = NULL;
  23
  24 static int dyn_git_object_dir, dyn_git_index_file, dyn_git_graft_file;
  25 static char *git_dir, *git_object_dir, *git_index_file, *git_refs_dir,
  26         *git_graft_file;
  27
  28 void setup_git(char *new_git_dir, char *new_git_object_dir,
  29                char *new_git_index_file, char *new_git_graft_file)
  30 {
  31         git_dir = new_git_dir;
  32         if (!git_dir)
  33                 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
  34
  35         if (dyn_git_object_dir)
  36                 free(git_object_dir);
  37         git_object_dir = new_git_object_dir;
  38         if (!git_object_dir) {
  39                 git_object_dir = xmalloc(strlen(git_dir) + 9);
  40                 sprintf(git_object_dir, "%s/objects", git_dir);
  41                 dyn_git_object_dir = 1;
  42         } else {
  43                 dyn_git_object_dir = 0;
  44         }
  45
  46         if (git_refs_dir)
  47                 free(git_refs_dir);
  48         git_refs_dir = xmalloc(strlen(git_dir) + 6);
  49         sprintf(git_refs_dir, "%s/refs", git_dir);
  50
  51         if (dyn_git_index_file)
  52                 free(git_index_file);
  53         git_index_file = new_git_index_file;
  54         if (!git_index_file) {
  55                 git_index_file = xmalloc(strlen(git_dir) + 7);
  56                 sprintf(git_index_file, "%s/index", git_dir);
  57                 dyn_git_index_file = 1;
  58         } else {
  59                 dyn_git_index_file = 0;
  60         }
  61
  62         if (dyn_git_graft_file)
  63                 free(git_graft_file);
  64         git_graft_file = new_git_graft_file;
  65         if (!git_graft_file) {
  66                 git_graft_file = strdup(git_path("info/grafts"));
  67                 dyn_git_graft_file = 1;
  68         } else {
  69                 dyn_git_graft_file = 0;
  70         }
  71 }
  72
  73 static void setup_git_env(void)
  74 {
  75         setup_git(getenv(GIT_DIR_ENVIRONMENT),
  76                   getenv(DB_ENVIRONMENT),
  77                   getenv(INDEX_ENVIRONMENT),
  78                   getenv(GRAFT_ENVIRONMENT));
  79 }
  80
  81 char *get_git_dir(void)
  82 {
  83         if (!git_dir)
  84                 setup_git_env();
  85         return git_dir;
  86 }
  87
  88 char *get_object_directory(void)
  89 {
  90         if (!git_object_dir)
  91                 setup_git_env();
  92         return git_object_dir;
  93 }
  94
  95 char *get_refs_directory(void)
  96 {
  97         if (!git_refs_dir)
  98                 setup_git_env();
  99         return git_refs_dir;
 100 }
 101
 102 char *get_index_file(void)
 103 {
 104         if (!git_index_file)
 105                 setup_git_env();
 106         return git_index_file;
 107 }
 108
 109 char *get_graft_file(void)
 110 {
 111         if (!git_graft_file)
 112                 setup_git_env();
 113         return git_graft_file;
 114 }
 115
 116