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#include "commit.h"
  14
  15int trust_executable_bit = 1;
  16int trust_ctime = 1;
  17int check_stat = 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 warn_on_object_refname_ambiguity = 1;
  27int ref_paranoia = -1;
  28int repository_format_precious_objects;
  29const char *git_commit_encoding;
  30const char *git_log_output_encoding;
  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 = 96 * 1024 * 1024;
  41unsigned long big_file_threshold = 512 * 1024 * 1024;
  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 check_replace_refs = 1;
  49char *git_replace_ref_base;
  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;
  64int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
  65unsigned long pack_size_limit_cfg;
  66
  67#ifndef PROTECT_HFS_DEFAULT
  68#define PROTECT_HFS_DEFAULT 0
  69#endif
  70int protect_hfs = PROTECT_HFS_DEFAULT;
  71
  72#ifndef PROTECT_NTFS_DEFAULT
  73#define PROTECT_NTFS_DEFAULT 0
  74#endif
  75int protect_ntfs = PROTECT_NTFS_DEFAULT;
  76
  77/*
  78 * The character that begins a commented line in user-editable file
  79 * that is subject to stripspace.
  80 */
  81char comment_line_char = '#';
  82int auto_comment_line_char;
  83
  84/* Parallel index stat data preload? */
  85int core_preload_index = 1;
  86
  87/*
  88 * This is a hack for test programs like test-dump-untracked-cache to
  89 * ensure that they do not modify the untracked cache when reading it.
  90 * Do not use it otherwise!
  91 */
  92int ignore_untracked_cache_config;
  93
  94/* This is set by setup_git_dir_gently() and/or git_default_config() */
  95char *git_work_tree_cfg;
  96static char *work_tree;
  97
  98static const char *namespace;
  99static size_t namespace_len;
 100
 101static const char *git_dir, *git_common_dir;
 102static char *git_object_dir, *git_index_file, *git_graft_file;
 103int git_db_env, git_index_env, git_graft_env, git_common_dir_env;
 104
 105/*
 106 * Repository-local GIT_* environment variables; see cache.h for details.
 107 */
 108const char * const local_repo_env[] = {
 109        ALTERNATE_DB_ENVIRONMENT,
 110        CONFIG_ENVIRONMENT,
 111        CONFIG_DATA_ENVIRONMENT,
 112        DB_ENVIRONMENT,
 113        GIT_DIR_ENVIRONMENT,
 114        GIT_WORK_TREE_ENVIRONMENT,
 115        GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
 116        GRAFT_ENVIRONMENT,
 117        INDEX_ENVIRONMENT,
 118        NO_REPLACE_OBJECTS_ENVIRONMENT,
 119        GIT_REPLACE_REF_BASE_ENVIRONMENT,
 120        GIT_PREFIX_ENVIRONMENT,
 121        GIT_SHALLOW_FILE_ENVIRONMENT,
 122        GIT_COMMON_DIR_ENVIRONMENT,
 123        NULL
 124};
 125
 126static char *expand_namespace(const char *raw_namespace)
 127{
 128        struct strbuf buf = STRBUF_INIT;
 129        struct strbuf **components, **c;
 130
 131        if (!raw_namespace || !*raw_namespace)
 132                return xstrdup("");
 133
 134        strbuf_addstr(&buf, raw_namespace);
 135        components = strbuf_split(&buf, '/');
 136        strbuf_reset(&buf);
 137        for (c = components; *c; c++)
 138                if (strcmp((*c)->buf, "/") != 0)
 139                        strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 140        strbuf_list_free(components);
 141        if (check_refname_format(buf.buf, 0))
 142                die("bad git namespace path \"%s\"", raw_namespace);
 143        strbuf_addch(&buf, '/');
 144        return strbuf_detach(&buf, NULL);
 145}
 146
 147static char *git_path_from_env(const char *envvar, const char *git_dir,
 148                               const char *path, int *fromenv)
 149{
 150        const char *value = getenv(envvar);
 151        if (!value)
 152                return xstrfmt("%s/%s", git_dir, path);
 153        if (fromenv)
 154                *fromenv = 1;
 155        return xstrdup(value);
 156}
 157
 158static void setup_git_env(void)
 159{
 160        struct strbuf sb = STRBUF_INIT;
 161        const char *gitfile;
 162        const char *shallow_file;
 163        const char *replace_ref_base;
 164
 165        git_dir = getenv(GIT_DIR_ENVIRONMENT);
 166        if (!git_dir)
 167                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
 168        gitfile = read_gitfile(git_dir);
 169        git_dir = xstrdup(gitfile ? gitfile : git_dir);
 170        if (get_common_dir(&sb, git_dir))
 171                git_common_dir_env = 1;
 172        git_common_dir = strbuf_detach(&sb, NULL);
 173        git_object_dir = git_path_from_env(DB_ENVIRONMENT, git_common_dir,
 174                                           "objects", &git_db_env);
 175        git_index_file = git_path_from_env(INDEX_ENVIRONMENT, git_dir,
 176                                           "index", &git_index_env);
 177        git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, git_common_dir,
 178                                           "info/grafts", &git_graft_env);
 179        if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 180                check_replace_refs = 0;
 181        replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
 182        git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
 183                                                          : "refs/replace/");
 184        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 185        namespace_len = strlen(namespace);
 186        shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
 187        if (shallow_file)
 188                set_alternate_shallow_file(shallow_file, 0);
 189}
 190
 191int is_bare_repository(void)
 192{
 193        /* if core.bare is not 'false', let's see if there is a work tree */
 194        return is_bare_repository_cfg && !get_git_work_tree();
 195}
 196
 197const char *get_git_dir(void)
 198{
 199        if (!git_dir)
 200                setup_git_env();
 201        return git_dir;
 202}
 203
 204const char *get_git_common_dir(void)
 205{
 206        return git_common_dir;
 207}
 208
 209const char *get_git_namespace(void)
 210{
 211        if (!namespace)
 212                setup_git_env();
 213        return namespace;
 214}
 215
 216const char *strip_namespace(const char *namespaced_ref)
 217{
 218        if (!starts_with(namespaced_ref, get_git_namespace()))
 219                return NULL;
 220        return namespaced_ref + namespace_len;
 221}
 222
 223static int git_work_tree_initialized;
 224
 225/*
 226 * Note.  This works only before you used a work tree.  This was added
 227 * primarily to support git-clone to work in a new repository it just
 228 * created, and is not meant to flip between different work trees.
 229 */
 230void set_git_work_tree(const char *new_work_tree)
 231{
 232        if (git_work_tree_initialized) {
 233                new_work_tree = real_path(new_work_tree);
 234                if (strcmp(new_work_tree, work_tree))
 235                        die("internal error: work tree has already been set\n"
 236                            "Current worktree: %s\nNew worktree: %s",
 237                            work_tree, new_work_tree);
 238                return;
 239        }
 240        git_work_tree_initialized = 1;
 241        work_tree = xstrdup(real_path(new_work_tree));
 242}
 243
 244const char *get_git_work_tree(void)
 245{
 246        return work_tree;
 247}
 248
 249char *get_object_directory(void)
 250{
 251        if (!git_object_dir)
 252                setup_git_env();
 253        return git_object_dir;
 254}
 255
 256int odb_mkstemp(char *template, size_t limit, const char *pattern)
 257{
 258        int fd;
 259        /*
 260         * we let the umask do its job, don't try to be more
 261         * restrictive except to remove write permission.
 262         */
 263        int mode = 0444;
 264        snprintf(template, limit, "%s/%s",
 265                 get_object_directory(), pattern);
 266        fd = git_mkstemp_mode(template, mode);
 267        if (0 <= fd)
 268                return fd;
 269
 270        /* slow path */
 271        /* some mkstemp implementations erase template on failure */
 272        snprintf(template, limit, "%s/%s",
 273                 get_object_directory(), pattern);
 274        safe_create_leading_directories(template);
 275        return xmkstemp_mode(template, mode);
 276}
 277
 278int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1)
 279{
 280        int fd;
 281
 282        snprintf(name, namesz, "%s/pack/pack-%s.keep",
 283                 get_object_directory(), sha1_to_hex(sha1));
 284        fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 285        if (0 <= fd)
 286                return fd;
 287
 288        /* slow path */
 289        safe_create_leading_directories(name);
 290        return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 291}
 292
 293char *get_index_file(void)
 294{
 295        if (!git_index_file)
 296                setup_git_env();
 297        return git_index_file;
 298}
 299
 300char *get_graft_file(void)
 301{
 302        if (!git_graft_file)
 303                setup_git_env();
 304        return git_graft_file;
 305}
 306
 307int set_git_dir(const char *path)
 308{
 309        if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 310                return error("Could not set GIT_DIR to '%s'", path);
 311        setup_git_env();
 312        return 0;
 313}
 314
 315const char *get_log_output_encoding(void)
 316{
 317        return git_log_output_encoding ? git_log_output_encoding
 318                : get_commit_output_encoding();
 319}
 320
 321const char *get_commit_output_encoding(void)
 322{
 323        return git_commit_encoding ? git_commit_encoding : "UTF-8";
 324}
 325
 326static int the_shared_repository = PERM_UMASK;
 327static int need_shared_repository_from_config = 1;
 328
 329void set_shared_repository(int value)
 330{
 331        the_shared_repository = value;
 332        need_shared_repository_from_config = 0;
 333}
 334
 335int get_shared_repository(void)
 336{
 337        if (need_shared_repository_from_config) {
 338                const char *var = "core.sharedrepository";
 339                const char *value;
 340                if (!git_config_get_value(var, &value))
 341                        the_shared_repository = git_config_perm(var, value);
 342                need_shared_repository_from_config = 0;
 343        }
 344        return the_shared_repository;
 345}