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#include "fmt-merge-msg.h"
  13
  14int trust_executable_bit = 1;
  15int trust_ctime = 1;
  16int check_stat = 1;
  17int has_symlinks = 1;
  18int minimum_abbrev = 4, default_abbrev = 7;
  19int ignore_case;
  20int assume_unchanged;
  21int prefer_symlink_refs;
  22int is_bare_repository_cfg = -1; /* unspecified */
  23int log_all_ref_updates = -1; /* unspecified */
  24int warn_ambiguous_refs = 1;
  25int repository_format_version;
  26const char *git_commit_encoding;
  27const char *git_log_output_encoding;
  28int shared_repository = PERM_UMASK;
  29const char *apply_default_whitespace;
  30const char *apply_default_ignorewhitespace;
  31const char *git_attributes_file;
  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_UNSPECIFIED;
  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;
  61int merge_log_config = -1;
  62int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
  63struct startup_info *startup_info;
  64unsigned long pack_size_limit_cfg;
  65
  66/* Parallel index stat data preload? */
  67int core_preload_index = 0;
  68
  69/* This is set by setup_git_dir_gently() and/or git_default_config() */
  70char *git_work_tree_cfg;
  71static char *work_tree;
  72
  73static const char *namespace;
  74static size_t namespace_len;
  75
  76static const char *git_dir;
  77static char *git_object_dir, *git_index_file, *git_graft_file;
  78
  79/*
  80 * Repository-local GIT_* environment variables
  81 * Remember to update local_repo_env_size in cache.h when
  82 * the size of the list changes
  83 */
  84const char * const local_repo_env[LOCAL_REPO_ENV_SIZE + 1] = {
  85        ALTERNATE_DB_ENVIRONMENT,
  86        CONFIG_ENVIRONMENT,
  87        CONFIG_DATA_ENVIRONMENT,
  88        DB_ENVIRONMENT,
  89        GIT_DIR_ENVIRONMENT,
  90        GIT_WORK_TREE_ENVIRONMENT,
  91        GRAFT_ENVIRONMENT,
  92        INDEX_ENVIRONMENT,
  93        NO_REPLACE_OBJECTS_ENVIRONMENT,
  94        NULL
  95};
  96
  97static char *expand_namespace(const char *raw_namespace)
  98{
  99        struct strbuf buf = STRBUF_INIT;
 100        struct strbuf **components, **c;
 101
 102        if (!raw_namespace || !*raw_namespace)
 103                return xstrdup("");
 104
 105        strbuf_addstr(&buf, raw_namespace);
 106        components = strbuf_split(&buf, '/');
 107        strbuf_reset(&buf);
 108        for (c = components; *c; c++)
 109                if (strcmp((*c)->buf, "/") != 0)
 110                        strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 111        strbuf_list_free(components);
 112        if (check_refname_format(buf.buf, 0))
 113                die("bad git namespace path \"%s\"", raw_namespace);
 114        strbuf_addch(&buf, '/');
 115        return strbuf_detach(&buf, NULL);
 116}
 117
 118static void setup_git_env(void)
 119{
 120        git_dir = getenv(GIT_DIR_ENVIRONMENT);
 121        git_dir = git_dir ? xstrdup(git_dir) : NULL;
 122        if (!git_dir) {
 123                git_dir = read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
 124                git_dir = git_dir ? xstrdup(git_dir) : NULL;
 125        }
 126        if (!git_dir)
 127                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
 128        git_object_dir = getenv(DB_ENVIRONMENT);
 129        if (!git_object_dir) {
 130                git_object_dir = xmalloc(strlen(git_dir) + 9);
 131                sprintf(git_object_dir, "%s/objects", git_dir);
 132        }
 133        git_index_file = getenv(INDEX_ENVIRONMENT);
 134        if (!git_index_file) {
 135                git_index_file = xmalloc(strlen(git_dir) + 7);
 136                sprintf(git_index_file, "%s/index", git_dir);
 137        }
 138        git_graft_file = getenv(GRAFT_ENVIRONMENT);
 139        if (!git_graft_file)
 140                git_graft_file = git_pathdup("info/grafts");
 141        if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 142                read_replace_refs = 0;
 143        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 144        namespace_len = strlen(namespace);
 145}
 146
 147int is_bare_repository(void)
 148{
 149        /* if core.bare is not 'false', let's see if there is a work tree */
 150        return is_bare_repository_cfg && !get_git_work_tree();
 151}
 152
 153int have_git_dir(void)
 154{
 155        return !!git_dir;
 156}
 157
 158const char *get_git_dir(void)
 159{
 160        if (!git_dir)
 161                setup_git_env();
 162        return git_dir;
 163}
 164
 165const char *get_git_namespace(void)
 166{
 167        if (!namespace)
 168                setup_git_env();
 169        return namespace;
 170}
 171
 172const char *strip_namespace(const char *namespaced_ref)
 173{
 174        if (prefixcmp(namespaced_ref, get_git_namespace()) != 0)
 175                return NULL;
 176        return namespaced_ref + namespace_len;
 177}
 178
 179static int git_work_tree_initialized;
 180
 181/*
 182 * Note.  This works only before you used a work tree.  This was added
 183 * primarily to support git-clone to work in a new repository it just
 184 * created, and is not meant to flip between different work trees.
 185 */
 186void set_git_work_tree(const char *new_work_tree)
 187{
 188        if (git_work_tree_initialized) {
 189                new_work_tree = real_path(new_work_tree);
 190                if (strcmp(new_work_tree, work_tree))
 191                        die("internal error: work tree has already been set\n"
 192                            "Current worktree: %s\nNew worktree: %s",
 193                            work_tree, new_work_tree);
 194                return;
 195        }
 196        git_work_tree_initialized = 1;
 197        work_tree = xstrdup(real_path(new_work_tree));
 198}
 199
 200const char *get_git_work_tree(void)
 201{
 202        return work_tree;
 203}
 204
 205char *get_object_directory(void)
 206{
 207        if (!git_object_dir)
 208                setup_git_env();
 209        return git_object_dir;
 210}
 211
 212int odb_mkstemp(char *template, size_t limit, const char *pattern)
 213{
 214        int fd;
 215        /*
 216         * we let the umask do its job, don't try to be more
 217         * restrictive except to remove write permission.
 218         */
 219        int mode = 0444;
 220        snprintf(template, limit, "%s/%s",
 221                 get_object_directory(), pattern);
 222        fd = git_mkstemp_mode(template, mode);
 223        if (0 <= fd)
 224                return fd;
 225
 226        /* slow path */
 227        /* some mkstemp implementations erase template on failure */
 228        snprintf(template, limit, "%s/%s",
 229                 get_object_directory(), pattern);
 230        safe_create_leading_directories(template);
 231        return xmkstemp_mode(template, mode);
 232}
 233
 234int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1)
 235{
 236        int fd;
 237
 238        snprintf(name, namesz, "%s/pack/pack-%s.keep",
 239                 get_object_directory(), sha1_to_hex(sha1));
 240        fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 241        if (0 <= fd)
 242                return fd;
 243
 244        /* slow path */
 245        safe_create_leading_directories(name);
 246        return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 247}
 248
 249char *get_index_file(void)
 250{
 251        if (!git_index_file)
 252                setup_git_env();
 253        return git_index_file;
 254}
 255
 256char *get_graft_file(void)
 257{
 258        if (!git_graft_file)
 259                setup_git_env();
 260        return git_graft_file;
 261}
 262
 263int set_git_dir(const char *path)
 264{
 265        if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 266                return error("Could not set GIT_DIR to '%s'", path);
 267        setup_git_env();
 268        return 0;
 269}
 270
 271const char *get_log_output_encoding(void)
 272{
 273        return git_log_output_encoding ? git_log_output_encoding
 274                : get_commit_output_encoding();
 275}
 276
 277const char *get_commit_output_encoding(void)
 278{
 279        return git_commit_encoding ? git_commit_encoding : "UTF-8";
 280}