Andrew's git - gitweb.git/blob

   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#include "refs.h"
  12
  13char git_default_email[MAX_GITNAME];
  14char git_default_name[MAX_GITNAME];
  15int user_ident_explicitly_given;
  16int trust_executable_bit = 1;
  17int trust_ctime = 1;
  18int has_symlinks = 1;
  19int minimum_abbrev = 4, default_abbrev = 7;
  20int ignore_case;
  21int assume_unchanged;
  22int prefer_symlink_refs;
  23int is_bare_repository_cfg = -1; /* unspecified */
  24int log_all_ref_updates = -1; /* unspecified */
  25int warn_ambiguous_refs = 1;
  26int repository_format_version;
  27const char *git_commit_encoding;
  28const char *git_log_output_encoding;
  29int shared_repository = PERM_UMASK;
  30const char *apply_default_whitespace;
  31const char *apply_default_ignorewhitespace;
  32int zlib_compression_level = Z_BEST_SPEED;
  33int core_compression_level;
  34int core_compression_seen;
  35int fsync_object_files;
  36size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  37size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  38size_t delta_base_cache_limit = 16 * 1024 * 1024;
  39unsigned long big_file_threshold = 512 * 1024 * 1024;
  40const char *pager_program;
  41int pager_use_color = 1;
  42const char *editor_program;
  43const char *askpass_program;
  44const char *excludes_file;
  45enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
  46int read_replace_refs = 1; /* NEEDSWORK: rename to use_replace_refs */
  47enum eol core_eol = EOL_UNSET;
  48enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
  49unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  50enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  51enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  52enum push_default_type push_default = PUSH_DEFAULT_MATCHING;
  53#ifndef OBJECT_CREATION_MODE
  54#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
  55#endif
  56enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
  57char *notes_ref_name;
  58int grafts_replace_parents = 1;
  59int core_apply_sparse_checkout;
  60struct startup_info *startup_info;
  61
  62/* Parallel index stat data preload? */
  63int core_preload_index = 0;
  64
  65/* This is set by setup_git_dir_gently() and/or git_default_config() */
  66char *git_work_tree_cfg;
  67static char *work_tree;
  68
  69static const char *namespace;
  70static size_t namespace_len;
  71
  72static const char *git_dir;
  73static char *git_object_dir, *git_index_file, *git_graft_file;
  74
  75/*
  76 * Repository-local GIT_* environment variables
  77 * Remember to update local_repo_env_size in cache.h when
  78 * the size of the list changes
  79 */
  80const char * const local_repo_env[LOCAL_REPO_ENV_SIZE + 1] = {
  81        ALTERNATE_DB_ENVIRONMENT,
  82        CONFIG_ENVIRONMENT,
  83        CONFIG_DATA_ENVIRONMENT,
  84        DB_ENVIRONMENT,
  85        GIT_DIR_ENVIRONMENT,
  86        GIT_WORK_TREE_ENVIRONMENT,
  87        GRAFT_ENVIRONMENT,
  88        INDEX_ENVIRONMENT,
  89        NO_REPLACE_OBJECTS_ENVIRONMENT,
  90        NULL
  91};
  92
  93static char *expand_namespace(const char *raw_namespace)
  94{
  95        struct strbuf buf = STRBUF_INIT;
  96        struct strbuf **components, **c;
  97
  98        if (!raw_namespace || !*raw_namespace)
  99                return xstrdup("");
 100
 101        strbuf_addstr(&buf, raw_namespace);
 102        components = strbuf_split(&buf, '/');
 103        strbuf_reset(&buf);
 104        for (c = components; *c; c++)
 105                if (strcmp((*c)->buf, "/") != 0)
 106                        strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 107        strbuf_list_free(components);
 108        if (check_ref_format(buf.buf) != CHECK_REF_FORMAT_OK)
 109                die("bad git namespace path \"%s\"", raw_namespace);
 110        strbuf_addch(&buf, '/');
 111        return strbuf_detach(&buf, NULL);
 112}
 113
 114static void setup_git_env(void)
 115{
 116        git_dir = getenv(GIT_DIR_ENVIRONMENT);
 117        git_dir = git_dir ? xstrdup(git_dir) : NULL;
 118        if (!git_dir) {
 119                git_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
 120                git_dir = git_dir ? xstrdup(git_dir) : NULL;
 121        }
 122        if (!git_dir)
 123                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
 124        git_object_dir = getenv(DB_ENVIRONMENT);
 125        if (!git_object_dir) {
 126                git_object_dir = xmalloc(strlen(git_dir) + 9);
 127                sprintf(git_object_dir, "%s/objects", git_dir);
 128        }
 129        git_index_file = getenv(INDEX_ENVIRONMENT);
 130        if (!git_index_file) {
 131                git_index_file = xmalloc(strlen(git_dir) + 7);
 132                sprintf(git_index_file, "%s/index", git_dir);
 133        }
 134        git_graft_file = getenv(GRAFT_ENVIRONMENT);
 135        if (!git_graft_file)
 136                git_graft_file = git_pathdup("info/grafts");
 137        if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 138                read_replace_refs = 0;
 139        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 140        namespace_len = strlen(namespace);
 141}
 142
 143int is_bare_repository(void)
 144{
 145        /* if core.bare is not 'false', let's see if there is a work tree */
 146        return is_bare_repository_cfg && !get_git_work_tree();
 147}
 148
 149int have_git_dir(void)
 150{
 151        return !!git_dir;
 152}
 153
 154const char *get_git_dir(void)
 155{
 156        if (!git_dir)
 157                setup_git_env();
 158        return git_dir;
 159}
 160
 161const char *get_git_namespace(void)
 162{
 163        if (!namespace)
 164                setup_git_env();
 165        return namespace;
 166}
 167
 168const char *strip_namespace(const char *namespaced_ref)
 169{
 170        if (prefixcmp(namespaced_ref, get_git_namespace()) != 0)
 171                return NULL;
 172        return namespaced_ref + namespace_len;
 173}
 174
 175static int git_work_tree_initialized;
 176
 177/*
 178 * Note.  This works only before you used a work tree.  This was added
 179 * primarily to support git-clone to work in a new repository it just
 180 * created, and is not meant to flip between different work trees.
 181 */
 182void set_git_work_tree(const char *new_work_tree)
 183{
 184        if (git_work_tree_initialized) {
 185                new_work_tree = real_path(new_work_tree);
 186                if (strcmp(new_work_tree, work_tree))
 187                        die("internal error: work tree has already been set\n"
 188                            "Current worktree: %s\nNew worktree: %s",
 189                            work_tree, new_work_tree);
 190                return;
 191        }
 192        git_work_tree_initialized = 1;
 193        work_tree = xstrdup(real_path(new_work_tree));
 194}
 195
 196const char *get_git_work_tree(void)
 197{
 198        return work_tree;
 199}
 200
 201char *get_object_directory(void)
 202{
 203        if (!git_object_dir)
 204                setup_git_env();
 205        return git_object_dir;
 206}
 207
 208int odb_mkstemp(char *template, size_t limit, const char *pattern)
 209{
 210        int fd;
 211        /*
 212         * we let the umask do its job, don't try to be more
 213         * restrictive except to remove write permission.
 214         */
 215        int mode = 0444;
 216        snprintf(template, limit, "%s/%s",
 217                 get_object_directory(), pattern);
 218        fd = git_mkstemp_mode(template, mode);
 219        if (0 <= fd)
 220                return fd;
 221
 222        /* slow path */
 223        /* some mkstemp implementations erase template on failure */
 224        snprintf(template, limit, "%s/%s",
 225                 get_object_directory(), pattern);
 226        safe_create_leading_directories(template);
 227        return xmkstemp_mode(template, mode);
 228}
 229
 230int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1)
 231{
 232        int fd;
 233
 234        snprintf(name, namesz, "%s/pack/pack-%s.keep",
 235                 get_object_directory(), sha1_to_hex(sha1));
 236        fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 237        if (0 <= fd)
 238                return fd;
 239
 240        /* slow path */
 241        safe_create_leading_directories(name);
 242        return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 243}
 244
 245char *get_index_file(void)
 246{
 247        if (!git_index_file)
 248                setup_git_env();
 249        return git_index_file;
 250}
 251
 252char *get_graft_file(void)
 253{
 254        if (!git_graft_file)
 255                setup_git_env();
 256        return git_graft_file;
 257}
 258
 259int set_git_dir(const char *path)
 260{
 261        if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 262                return error("Could not set GIT_DIR to '%s'", path);
 263        setup_git_env();
 264        return 0;
 265}
 266
 267const char *get_log_output_encoding(void)
 268{
 269        return git_log_output_encoding ? git_log_output_encoding
 270                : get_commit_output_encoding();
 271}
 272
 273const char *get_commit_output_encoding(void)
 274{
 275        return git_commit_encoding ? git_commit_encoding : "UTF-8";
 276}