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 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 = 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;
  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 = '#';
  72int auto_comment_line_char;
  73
  74/* Parallel index stat data preload? */
  75int core_preload_index = 1;
  76
  77/* This is set by setup_git_dir_gently() and/or git_default_config() */
  78char *git_work_tree_cfg;
  79static char *work_tree;
  80
  81static const char *namespace;
  82static size_t namespace_len;
  83
  84static const char *git_dir, *git_common_dir;
  85static char *git_object_dir, *git_index_file, *git_graft_file;
  86int git_db_env, git_index_env, git_graft_env, git_common_dir_env;
  87
  88/*
  89 * Repository-local GIT_* environment variables; see cache.h for details.
  90 */
  91const char * const local_repo_env[] = {
  92        ALTERNATE_DB_ENVIRONMENT,
  93        CONFIG_ENVIRONMENT,
  94        CONFIG_DATA_ENVIRONMENT,
  95        DB_ENVIRONMENT,
  96        GIT_DIR_ENVIRONMENT,
  97        GIT_WORK_TREE_ENVIRONMENT,
  98        GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
  99        GRAFT_ENVIRONMENT,
 100        INDEX_ENVIRONMENT,
 101        NO_REPLACE_OBJECTS_ENVIRONMENT,
 102        GIT_PREFIX_ENVIRONMENT,
 103        GIT_SHALLOW_FILE_ENVIRONMENT,
 104        GIT_COMMON_DIR_ENVIRONMENT,
 105        NULL
 106};
 107
 108static char *expand_namespace(const char *raw_namespace)
 109{
 110        struct strbuf buf = STRBUF_INIT;
 111        struct strbuf **components, **c;
 112
 113        if (!raw_namespace || !*raw_namespace)
 114                return xstrdup("");
 115
 116        strbuf_addstr(&buf, raw_namespace);
 117        components = strbuf_split(&buf, '/');
 118        strbuf_reset(&buf);
 119        for (c = components; *c; c++)
 120                if (strcmp((*c)->buf, "/") != 0)
 121                        strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 122        strbuf_list_free(components);
 123        if (check_refname_format(buf.buf, 0))
 124                die("bad git namespace path \"%s\"", raw_namespace);
 125        strbuf_addch(&buf, '/');
 126        return strbuf_detach(&buf, NULL);
 127}
 128
 129static char *git_path_from_env(const char *envvar, const char *git_dir,
 130                               const char *path, int *fromenv)
 131{
 132        const char *value = getenv(envvar);
 133        if (!value) {
 134                char *buf = xmalloc(strlen(git_dir) + strlen(path) + 2);
 135                sprintf(buf, "%s/%s", git_dir, path);
 136                return buf;
 137        }
 138        if (fromenv)
 139                *fromenv = 1;
 140        return xstrdup(value);
 141}
 142
 143static void setup_git_env(void)
 144{
 145        struct strbuf sb = STRBUF_INIT;
 146        const char *gitfile;
 147        const char *shallow_file;
 148
 149        git_dir = getenv(GIT_DIR_ENVIRONMENT);
 150        if (!git_dir)
 151                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
 152        gitfile = read_gitfile(git_dir);
 153        git_dir = xstrdup(gitfile ? gitfile : git_dir);
 154        if (get_common_dir(&sb, git_dir))
 155                git_common_dir_env = 1;
 156        git_common_dir = strbuf_detach(&sb, NULL);
 157        git_object_dir = git_path_from_env(DB_ENVIRONMENT, git_common_dir,
 158                                           "objects", &git_db_env);
 159        git_index_file = git_path_from_env(INDEX_ENVIRONMENT, git_dir,
 160                                           "index", &git_index_env);
 161        git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, git_common_dir,
 162                                           "info/grafts", &git_graft_env);
 163        if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 164                check_replace_refs = 0;
 165        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 166        namespace_len = strlen(namespace);
 167        shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
 168        if (shallow_file)
 169                set_alternate_shallow_file(shallow_file, 0);
 170}
 171
 172int is_bare_repository(void)
 173{
 174        /* if core.bare is not 'false', let's see if there is a work tree */
 175        return is_bare_repository_cfg && !get_git_work_tree();
 176}
 177
 178const char *get_git_dir(void)
 179{
 180        if (!git_dir)
 181                setup_git_env();
 182        return git_dir;
 183}
 184
 185const char *get_git_common_dir(void)
 186{
 187        return git_common_dir;
 188}
 189
 190const char *get_git_namespace(void)
 191{
 192        if (!namespace)
 193                setup_git_env();
 194        return namespace;
 195}
 196
 197const char *strip_namespace(const char *namespaced_ref)
 198{
 199        if (!starts_with(namespaced_ref, get_git_namespace()))
 200                return NULL;
 201        return namespaced_ref + namespace_len;
 202}
 203
 204static int git_work_tree_initialized;
 205
 206/*
 207 * Note.  This works only before you used a work tree.  This was added
 208 * primarily to support git-clone to work in a new repository it just
 209 * created, and is not meant to flip between different work trees.
 210 */
 211void set_git_work_tree(const char *new_work_tree)
 212{
 213        if (git_work_tree_initialized) {
 214                new_work_tree = real_path(new_work_tree);
 215                if (strcmp(new_work_tree, work_tree))
 216                        die("internal error: work tree has already been set\n"
 217                            "Current worktree: %s\nNew worktree: %s",
 218                            work_tree, new_work_tree);
 219                return;
 220        }
 221        git_work_tree_initialized = 1;
 222        work_tree = xstrdup(real_path(new_work_tree));
 223}
 224
 225const char *get_git_work_tree(void)
 226{
 227        return work_tree;
 228}
 229
 230char *get_object_directory(void)
 231{
 232        if (!git_object_dir)
 233                setup_git_env();
 234        return git_object_dir;
 235}
 236
 237int odb_mkstemp(char *template, size_t limit, const char *pattern)
 238{
 239        int fd;
 240        /*
 241         * we let the umask do its job, don't try to be more
 242         * restrictive except to remove write permission.
 243         */
 244        int mode = 0444;
 245        snprintf(template, limit, "%s/%s",
 246                 get_object_directory(), pattern);
 247        fd = git_mkstemp_mode(template, mode);
 248        if (0 <= fd)
 249                return fd;
 250
 251        /* slow path */
 252        /* some mkstemp implementations erase template on failure */
 253        snprintf(template, limit, "%s/%s",
 254                 get_object_directory(), pattern);
 255        safe_create_leading_directories(template);
 256        return xmkstemp_mode(template, mode);
 257}
 258
 259int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1)
 260{
 261        int fd;
 262
 263        snprintf(name, namesz, "%s/pack/pack-%s.keep",
 264                 get_object_directory(), sha1_to_hex(sha1));
 265        fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 266        if (0 <= fd)
 267                return fd;
 268
 269        /* slow path */
 270        safe_create_leading_directories(name);
 271        return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 272}
 273
 274char *get_index_file(void)
 275{
 276        if (!git_index_file)
 277                setup_git_env();
 278        return git_index_file;
 279}
 280
 281char *get_graft_file(void)
 282{
 283        if (!git_graft_file)
 284                setup_git_env();
 285        return git_graft_file;
 286}
 287
 288int set_git_dir(const char *path)
 289{
 290        if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 291                return error("Could not set GIT_DIR to '%s'", path);
 292        setup_git_env();
 293        return 0;
 294}
 295
 296const char *get_log_output_encoding(void)
 297{
 298        return git_log_output_encoding ? git_log_output_encoding
 299                : get_commit_output_encoding();
 300}
 301
 302const char *get_commit_output_encoding(void)
 303{
 304        return git_commit_encoding ? git_commit_encoding : "UTF-8";
 305}