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 *log_pack_access;
  41const char *pager_program;
  42int pager_use_color = 1;
  43const char *editor_program;
  44const char *askpass_program;
  45const char *excludes_file;
  46enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
  47int read_replace_refs = 1; /* NEEDSWORK: rename to use_replace_refs */
  48enum eol core_eol = EOL_UNSET;
  49enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
  50unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  51enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  52enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  53enum push_default_type push_default = PUSH_DEFAULT_MATCHING;
  54#ifndef OBJECT_CREATION_MODE
  55#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
  56#endif
  57enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
  58char *notes_ref_name;
  59int grafts_replace_parents = 1;
  60int core_apply_sparse_checkout;
  61struct startup_info *startup_info;
  62
  63/* Parallel index stat data preload? */
  64int core_preload_index = 0;
  65
  66/* This is set by setup_git_dir_gently() and/or git_default_config() */
  67char *git_work_tree_cfg;
  68static char *work_tree;
  69
  70static const char *namespace;
  71static size_t namespace_len;
  72
  73static const char *git_dir;
  74static char *git_object_dir, *git_index_file, *git_graft_file;
  75
  76/*
  77 * Repository-local GIT_* environment variables
  78 * Remember to update local_repo_env_size in cache.h when
  79 * the size of the list changes
  80 */
  81const char * const local_repo_env[LOCAL_REPO_ENV_SIZE + 1] = {
  82        ALTERNATE_DB_ENVIRONMENT,
  83        CONFIG_ENVIRONMENT,
  84        CONFIG_DATA_ENVIRONMENT,
  85        DB_ENVIRONMENT,
  86        GIT_DIR_ENVIRONMENT,
  87        GIT_WORK_TREE_ENVIRONMENT,
  88        GRAFT_ENVIRONMENT,
  89        INDEX_ENVIRONMENT,
  90        NO_REPLACE_OBJECTS_ENVIRONMENT,
  91        NULL
  92};
  93
  94static char *expand_namespace(const char *raw_namespace)
  95{
  96        struct strbuf buf = STRBUF_INIT;
  97        struct strbuf **components, **c;
  98
  99        if (!raw_namespace || !*raw_namespace)
 100                return xstrdup("");
 101
 102        strbuf_addstr(&buf, raw_namespace);
 103        components = strbuf_split(&buf, '/');
 104        strbuf_reset(&buf);
 105        for (c = components; *c; c++)
 106                if (strcmp((*c)->buf, "/") != 0)
 107                        strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 108        strbuf_list_free(components);
 109        if (check_ref_format(buf.buf) != CHECK_REF_FORMAT_OK)
 110                die("bad git namespace path \"%s\"", raw_namespace);
 111        strbuf_addch(&buf, '/');
 112        return strbuf_detach(&buf, NULL);
 113}
 114
 115static void setup_git_env(void)
 116{
 117        git_dir = getenv(GIT_DIR_ENVIRONMENT);
 118        git_dir = git_dir ? xstrdup(git_dir) : NULL;
 119        if (!git_dir) {
 120                git_dir = read_gitfile_gently(DEFAULT_GIT_DIR_ENVIRONMENT);
 121                git_dir = git_dir ? xstrdup(git_dir) : NULL;
 122        }
 123        if (!git_dir)
 124                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
 125        git_object_dir = getenv(DB_ENVIRONMENT);
 126        if (!git_object_dir) {
 127                git_object_dir = xmalloc(strlen(git_dir) + 9);
 128                sprintf(git_object_dir, "%s/objects", git_dir);
 129        }
 130        git_index_file = getenv(INDEX_ENVIRONMENT);
 131        if (!git_index_file) {
 132                git_index_file = xmalloc(strlen(git_dir) + 7);
 133                sprintf(git_index_file, "%s/index", git_dir);
 134        }
 135        git_graft_file = getenv(GRAFT_ENVIRONMENT);
 136        if (!git_graft_file)
 137                git_graft_file = git_pathdup("info/grafts");
 138        if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 139                read_replace_refs = 0;
 140        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 141        namespace_len = strlen(namespace);
 142}
 143
 144int is_bare_repository(void)
 145{
 146        /* if core.bare is not 'false', let's see if there is a work tree */
 147        return is_bare_repository_cfg && !get_git_work_tree();
 148}
 149
 150int have_git_dir(void)
 151{
 152        return !!git_dir;
 153}
 154
 155const char *get_git_dir(void)
 156{
 157        if (!git_dir)
 158                setup_git_env();
 159        return git_dir;
 160}
 161
 162const char *get_git_namespace(void)
 163{
 164        if (!namespace)
 165                setup_git_env();
 166        return namespace;
 167}
 168
 169const char *strip_namespace(const char *namespaced_ref)
 170{
 171        if (prefixcmp(namespaced_ref, get_git_namespace()) != 0)
 172                return NULL;
 173        return namespaced_ref + namespace_len;
 174}
 175
 176static int git_work_tree_initialized;
 177
 178/*
 179 * Note.  This works only before you used a work tree.  This was added
 180 * primarily to support git-clone to work in a new repository it just
 181 * created, and is not meant to flip between different work trees.
 182 */
 183void set_git_work_tree(const char *new_work_tree)
 184{
 185        if (git_work_tree_initialized) {
 186                new_work_tree = real_path(new_work_tree);
 187                if (strcmp(new_work_tree, work_tree))
 188                        die("internal error: work tree has already been set\n"
 189                            "Current worktree: %s\nNew worktree: %s",
 190                            work_tree, new_work_tree);
 191                return;
 192        }
 193        git_work_tree_initialized = 1;
 194        work_tree = xstrdup(real_path(new_work_tree));
 195}
 196
 197const char *get_git_work_tree(void)
 198{
 199        return work_tree;
 200}
 201
 202char *get_object_directory(void)
 203{
 204        if (!git_object_dir)
 205                setup_git_env();
 206        return git_object_dir;
 207}
 208
 209int odb_mkstemp(char *template, size_t limit, const char *pattern)
 210{
 211        int fd;
 212        /*
 213         * we let the umask do its job, don't try to be more
 214         * restrictive except to remove write permission.
 215         */
 216        int mode = 0444;
 217        snprintf(template, limit, "%s/%s",
 218                 get_object_directory(), pattern);
 219        fd = git_mkstemp_mode(template, mode);
 220        if (0 <= fd)
 221                return fd;
 222
 223        /* slow path */
 224        /* some mkstemp implementations erase template on failure */
 225        snprintf(template, limit, "%s/%s",
 226                 get_object_directory(), pattern);
 227        safe_create_leading_directories(template);
 228        return xmkstemp_mode(template, mode);
 229}
 230
 231int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1)
 232{
 233        int fd;
 234
 235        snprintf(name, namesz, "%s/pack/pack-%s.keep",
 236                 get_object_directory(), sha1_to_hex(sha1));
 237        fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 238        if (0 <= fd)
 239                return fd;
 240
 241        /* slow path */
 242        safe_create_leading_directories(name);
 243        return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 244}
 245
 246char *get_index_file(void)
 247{
 248        if (!git_index_file)
 249                setup_git_env();
 250        return git_index_file;
 251}
 252
 253char *get_graft_file(void)
 254{
 255        if (!git_graft_file)
 256                setup_git_env();
 257        return git_graft_file;
 258}
 259
 260int set_git_dir(const char *path)
 261{
 262        if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 263                return error("Could not set GIT_DIR to '%s'", path);
 264        setup_git_env();
 265        return 0;
 266}
 267
 268const char *get_log_output_encoding(void)
 269{
 270        return git_log_output_encoding ? git_log_output_encoding
 271                : get_commit_output_encoding();
 272}
 273
 274const char *get_commit_output_encoding(void)
 275{
 276        return git_commit_encoding ? git_commit_encoding : "UTF-8";
 277}