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
  14char git_default_email[MAX_GITNAME];
  15char git_default_name[MAX_GITNAME];
  16int user_ident_explicitly_given;
  17int trust_executable_bit = 1;
  18int trust_ctime = 1;
  19int has_symlinks = 1;
  20int minimum_abbrev = 4, default_abbrev = 7;
  21int ignore_case;
  22int assume_unchanged;
  23int prefer_symlink_refs;
  24int is_bare_repository_cfg = -1; /* unspecified */
  25int log_all_ref_updates = -1; /* unspecified */
  26int warn_ambiguous_refs = 1;
  27int repository_format_version;
  28const char *git_commit_encoding;
  29const char *git_log_output_encoding;
  30int shared_repository = PERM_UMASK;
  31const char *apply_default_whitespace;
  32const char *apply_default_ignorewhitespace;
  33const char *git_attributes_file;
  34int zlib_compression_level = Z_BEST_SPEED;
  35int core_compression_level;
  36int core_compression_seen;
  37int fsync_object_files;
  38size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  39size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  40size_t delta_base_cache_limit = 16 * 1024 * 1024;
  41unsigned long big_file_threshold = 512 * 1024 * 1024;
  42const char *log_pack_access;
  43const char *pager_program;
  44int pager_use_color = 1;
  45const char *editor_program;
  46const char *askpass_program;
  47const char *excludes_file;
  48enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
  49int read_replace_refs = 1; /* NEEDSWORK: rename to use_replace_refs */
  50enum eol core_eol = EOL_UNSET;
  51enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
  52unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  53enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  54enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  55enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
  56#ifndef OBJECT_CREATION_MODE
  57#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
  58#endif
  59enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
  60char *notes_ref_name;
  61int grafts_replace_parents = 1;
  62int core_apply_sparse_checkout;
  63int merge_log_config = -1;
  64struct startup_info *startup_info;
  65unsigned long pack_size_limit_cfg;
  66
  67/* Parallel index stat data preload? */
  68int core_preload_index = 0;
  69
  70/* This is set by setup_git_dir_gently() and/or git_default_config() */
  71char *git_work_tree_cfg;
  72static char *work_tree;
  73
  74static const char *namespace;
  75static size_t namespace_len;
  76
  77static const char *git_dir;
  78static char *git_object_dir, *git_index_file, *git_graft_file;
  79
  80/*
  81 * Repository-local GIT_* environment variables
  82 * Remember to update local_repo_env_size in cache.h when
  83 * the size of the list changes
  84 */
  85const char * const local_repo_env[LOCAL_REPO_ENV_SIZE + 1] = {
  86        ALTERNATE_DB_ENVIRONMENT,
  87        CONFIG_ENVIRONMENT,
  88        CONFIG_DATA_ENVIRONMENT,
  89        DB_ENVIRONMENT,
  90        GIT_DIR_ENVIRONMENT,
  91        GIT_WORK_TREE_ENVIRONMENT,
  92        GRAFT_ENVIRONMENT,
  93        INDEX_ENVIRONMENT,
  94        NO_REPLACE_OBJECTS_ENVIRONMENT,
  95        NULL
  96};
  97
  98static char *expand_namespace(const char *raw_namespace)
  99{
 100        struct strbuf buf = STRBUF_INIT;
 101        struct strbuf **components, **c;
 102
 103        if (!raw_namespace || !*raw_namespace)
 104                return xstrdup("");
 105
 106        strbuf_addstr(&buf, raw_namespace);
 107        components = strbuf_split(&buf, '/');
 108        strbuf_reset(&buf);
 109        for (c = components; *c; c++)
 110                if (strcmp((*c)->buf, "/") != 0)
 111                        strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 112        strbuf_list_free(components);
 113        if (check_refname_format(buf.buf, 0))
 114                die("bad git namespace path \"%s\"", raw_namespace);
 115        strbuf_addch(&buf, '/');
 116        return strbuf_detach(&buf, NULL);
 117}
 118
 119static void setup_git_env(void)
 120{
 121        git_dir = getenv(GIT_DIR_ENVIRONMENT);
 122        git_dir = git_dir ? xstrdup(git_dir) : NULL;
 123        if (!git_dir) {
 124                git_dir = read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
 125                git_dir = git_dir ? xstrdup(git_dir) : NULL;
 126        }
 127        if (!git_dir)
 128                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
 129        git_object_dir = getenv(DB_ENVIRONMENT);
 130        if (!git_object_dir) {
 131                git_object_dir = xmalloc(strlen(git_dir) + 9);
 132                sprintf(git_object_dir, "%s/objects", git_dir);
 133        }
 134        git_index_file = getenv(INDEX_ENVIRONMENT);
 135        if (!git_index_file) {
 136                git_index_file = xmalloc(strlen(git_dir) + 7);
 137                sprintf(git_index_file, "%s/index", git_dir);
 138        }
 139        git_graft_file = getenv(GRAFT_ENVIRONMENT);
 140        if (!git_graft_file)
 141                git_graft_file = git_pathdup("info/grafts");
 142        if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 143                read_replace_refs = 0;
 144        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 145        namespace_len = strlen(namespace);
 146}
 147
 148int is_bare_repository(void)
 149{
 150        /* if core.bare is not 'false', let's see if there is a work tree */
 151        return is_bare_repository_cfg && !get_git_work_tree();
 152}
 153
 154int have_git_dir(void)
 155{
 156        return !!git_dir;
 157}
 158
 159const char *get_git_dir(void)
 160{
 161        if (!git_dir)
 162                setup_git_env();
 163        return git_dir;
 164}
 165
 166const char *get_git_namespace(void)
 167{
 168        if (!namespace)
 169                setup_git_env();
 170        return namespace;
 171}
 172
 173const char *strip_namespace(const char *namespaced_ref)
 174{
 175        if (prefixcmp(namespaced_ref, get_git_namespace()) != 0)
 176                return NULL;
 177        return namespaced_ref + namespace_len;
 178}
 179
 180static int git_work_tree_initialized;
 181
 182/*
 183 * Note.  This works only before you used a work tree.  This was added
 184 * primarily to support git-clone to work in a new repository it just
 185 * created, and is not meant to flip between different work trees.
 186 */
 187void set_git_work_tree(const char *new_work_tree)
 188{
 189        if (git_work_tree_initialized) {
 190                new_work_tree = real_path(new_work_tree);
 191                if (strcmp(new_work_tree, work_tree))
 192                        die("internal error: work tree has already been set\n"
 193                            "Current worktree: %s\nNew worktree: %s",
 194                            work_tree, new_work_tree);
 195                return;
 196        }
 197        git_work_tree_initialized = 1;
 198        work_tree = xstrdup(real_path(new_work_tree));
 199}
 200
 201const char *get_git_work_tree(void)
 202{
 203        return work_tree;
 204}
 205
 206char *get_object_directory(void)
 207{
 208        if (!git_object_dir)
 209                setup_git_env();
 210        return git_object_dir;
 211}
 212
 213int odb_mkstemp(char *template, size_t limit, const char *pattern)
 214{
 215        int fd;
 216        /*
 217         * we let the umask do its job, don't try to be more
 218         * restrictive except to remove write permission.
 219         */
 220        int mode = 0444;
 221        snprintf(template, limit, "%s/%s",
 222                 get_object_directory(), pattern);
 223        fd = git_mkstemp_mode(template, mode);
 224        if (0 <= fd)
 225                return fd;
 226
 227        /* slow path */
 228        /* some mkstemp implementations erase template on failure */
 229        snprintf(template, limit, "%s/%s",
 230                 get_object_directory(), pattern);
 231        safe_create_leading_directories(template);
 232        return xmkstemp_mode(template, mode);
 233}
 234
 235int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1)
 236{
 237        int fd;
 238
 239        snprintf(name, namesz, "%s/pack/pack-%s.keep",
 240                 get_object_directory(), sha1_to_hex(sha1));
 241        fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 242        if (0 <= fd)
 243                return fd;
 244
 245        /* slow path */
 246        safe_create_leading_directories(name);
 247        return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 248}
 249
 250char *get_index_file(void)
 251{
 252        if (!git_index_file)
 253                setup_git_env();
 254        return git_index_file;
 255}
 256
 257char *get_graft_file(void)
 258{
 259        if (!git_graft_file)
 260                setup_git_env();
 261        return git_graft_file;
 262}
 263
 264int set_git_dir(const char *path)
 265{
 266        if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 267                return error("Could not set GIT_DIR to '%s'", path);
 268        setup_git_env();
 269        return 0;
 270}
 271
 272const char *get_log_output_encoding(void)
 273{
 274        return git_log_output_encoding ? git_log_output_encoding
 275                : get_commit_output_encoding();
 276}
 277
 278const char *get_commit_output_encoding(void)
 279{
 280        return git_commit_encoding ? git_commit_encoding : "UTF-8";
 281}