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 warn_on_object_refname_ambiguity = 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;
  32const char *git_attributes_file;
  33int zlib_compression_level = Z_BEST_SPEED;
  34int core_compression_level;
  35int core_compression_seen;
  36int fsync_object_files;
  37size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  38size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  39size_t delta_base_cache_limit = 16 * 1024 * 1024;
  40unsigned long big_file_threshold = 512 * 1024 * 1024;
  41const char *log_pack_access;
  42const char *pager_program;
  43int pager_use_color = 1;
  44const char *editor_program;
  45const char *askpass_program;
  46const char *excludes_file;
  47enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
  48int read_replace_refs = 1; /* NEEDSWORK: rename to use_replace_refs */
  49enum eol core_eol = EOL_UNSET;
  50enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
  51unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  52enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  53enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  54enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
  55#ifndef OBJECT_CREATION_MODE
  56#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
  57#endif
  58enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
  59char *notes_ref_name;
  60int grafts_replace_parents = 1;
  61int core_apply_sparse_checkout;
  62int merge_log_config = -1;
  63int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
  64struct startup_info *startup_info;
  65unsigned long pack_size_limit_cfg;
  66
  67/*
  68 * The character that begins a commented line in user-editable file
  69 * that is subject to stripspace.
  70 */
  71char comment_line_char = '#';
  72
  73/* Parallel index stat data preload? */
  74int core_preload_index = 0;
  75
  76/* This is set by setup_git_dir_gently() and/or git_default_config() */
  77char *git_work_tree_cfg;
  78static char *work_tree;
  79
  80static const char *namespace;
  81static size_t namespace_len;
  82
  83static const char *git_dir;
  84static char *git_object_dir, *git_index_file, *git_graft_file;
  85
  86/*
  87 * Repository-local GIT_* environment variables; see cache.h for details.
  88 */
  89const char * const local_repo_env[] = {
  90        ALTERNATE_DB_ENVIRONMENT,
  91        CONFIG_ENVIRONMENT,
  92        CONFIG_DATA_ENVIRONMENT,
  93        DB_ENVIRONMENT,
  94        GIT_DIR_ENVIRONMENT,
  95        GIT_WORK_TREE_ENVIRONMENT,
  96        GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
  97        GRAFT_ENVIRONMENT,
  98        INDEX_ENVIRONMENT,
  99        NO_REPLACE_OBJECTS_ENVIRONMENT,
 100        GIT_PREFIX_ENVIRONMENT,
 101        NULL
 102};
 103
 104static char *expand_namespace(const char *raw_namespace)
 105{
 106        struct strbuf buf = STRBUF_INIT;
 107        struct strbuf **components, **c;
 108
 109        if (!raw_namespace || !*raw_namespace)
 110                return xstrdup("");
 111
 112        strbuf_addstr(&buf, raw_namespace);
 113        components = strbuf_split(&buf, '/');
 114        strbuf_reset(&buf);
 115        for (c = components; *c; c++)
 116                if (strcmp((*c)->buf, "/") != 0)
 117                        strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 118        strbuf_list_free(components);
 119        if (check_refname_format(buf.buf, 0))
 120                die("bad git namespace path \"%s\"", raw_namespace);
 121        strbuf_addch(&buf, '/');
 122        return strbuf_detach(&buf, NULL);
 123}
 124
 125static void setup_git_env(void)
 126{
 127        git_dir = getenv(GIT_DIR_ENVIRONMENT);
 128        git_dir = git_dir ? xstrdup(git_dir) : NULL;
 129        if (!git_dir) {
 130                git_dir = read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
 131                git_dir = git_dir ? xstrdup(git_dir) : NULL;
 132        }
 133        if (!git_dir)
 134                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
 135        git_object_dir = getenv(DB_ENVIRONMENT);
 136        if (!git_object_dir) {
 137                git_object_dir = xmalloc(strlen(git_dir) + 9);
 138                sprintf(git_object_dir, "%s/objects", git_dir);
 139        }
 140        git_index_file = getenv(INDEX_ENVIRONMENT);
 141        if (!git_index_file) {
 142                git_index_file = xmalloc(strlen(git_dir) + 7);
 143                sprintf(git_index_file, "%s/index", git_dir);
 144        }
 145        git_graft_file = getenv(GRAFT_ENVIRONMENT);
 146        if (!git_graft_file)
 147                git_graft_file = git_pathdup("info/grafts");
 148        if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 149                read_replace_refs = 0;
 150        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 151        namespace_len = strlen(namespace);
 152}
 153
 154int is_bare_repository(void)
 155{
 156        /* if core.bare is not 'false', let's see if there is a work tree */
 157        return is_bare_repository_cfg && !get_git_work_tree();
 158}
 159
 160int have_git_dir(void)
 161{
 162        return !!git_dir;
 163}
 164
 165const char *get_git_dir(void)
 166{
 167        if (!git_dir)
 168                setup_git_env();
 169        return git_dir;
 170}
 171
 172const char *get_git_namespace(void)
 173{
 174        if (!namespace)
 175                setup_git_env();
 176        return namespace;
 177}
 178
 179const char *strip_namespace(const char *namespaced_ref)
 180{
 181        if (prefixcmp(namespaced_ref, get_git_namespace()) != 0)
 182                return NULL;
 183        return namespaced_ref + namespace_len;
 184}
 185
 186static int git_work_tree_initialized;
 187
 188/*
 189 * Note.  This works only before you used a work tree.  This was added
 190 * primarily to support git-clone to work in a new repository it just
 191 * created, and is not meant to flip between different work trees.
 192 */
 193void set_git_work_tree(const char *new_work_tree)
 194{
 195        if (git_work_tree_initialized) {
 196                new_work_tree = real_path(new_work_tree);
 197                if (strcmp(new_work_tree, work_tree))
 198                        die("internal error: work tree has already been set\n"
 199                            "Current worktree: %s\nNew worktree: %s",
 200                            work_tree, new_work_tree);
 201                return;
 202        }
 203        git_work_tree_initialized = 1;
 204        work_tree = xstrdup(real_path(new_work_tree));
 205}
 206
 207const char *get_git_work_tree(void)
 208{
 209        return work_tree;
 210}
 211
 212char *get_object_directory(void)
 213{
 214        if (!git_object_dir)
 215                setup_git_env();
 216        return git_object_dir;
 217}
 218
 219int odb_mkstemp(char *template, size_t limit, const char *pattern)
 220{
 221        int fd;
 222        /*
 223         * we let the umask do its job, don't try to be more
 224         * restrictive except to remove write permission.
 225         */
 226        int mode = 0444;
 227        snprintf(template, limit, "%s/%s",
 228                 get_object_directory(), pattern);
 229        fd = git_mkstemp_mode(template, mode);
 230        if (0 <= fd)
 231                return fd;
 232
 233        /* slow path */
 234        /* some mkstemp implementations erase template on failure */
 235        snprintf(template, limit, "%s/%s",
 236                 get_object_directory(), pattern);
 237        safe_create_leading_directories(template);
 238        return xmkstemp_mode(template, mode);
 239}
 240
 241int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1)
 242{
 243        int fd;
 244
 245        snprintf(name, namesz, "%s/pack/pack-%s.keep",
 246                 get_object_directory(), sha1_to_hex(sha1));
 247        fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 248        if (0 <= fd)
 249                return fd;
 250
 251        /* slow path */
 252        safe_create_leading_directories(name);
 253        return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 254}
 255
 256char *get_index_file(void)
 257{
 258        if (!git_index_file)
 259                setup_git_env();
 260        return git_index_file;
 261}
 262
 263char *get_graft_file(void)
 264{
 265        if (!git_graft_file)
 266                setup_git_env();
 267        return git_graft_file;
 268}
 269
 270int set_git_dir(const char *path)
 271{
 272        if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 273                return error("Could not set GIT_DIR to '%s'", path);
 274        setup_git_env();
 275        return 0;
 276}
 277
 278const char *get_log_output_encoding(void)
 279{
 280        return git_log_output_encoding ? git_log_output_encoding
 281                : get_commit_output_encoding();
 282}
 283
 284const char *get_commit_output_encoding(void)
 285{
 286        return git_commit_encoding ? git_commit_encoding : "UTF-8";
 287}