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_version;
  29const char *git_commit_encoding;
  30const char *git_log_output_encoding;
  31int shared_repository = PERM_UMASK;
  32const char *apply_default_whitespace;
  33const char *apply_default_ignorewhitespace;
  34const char *git_attributes_file;
  35int zlib_compression_level = Z_BEST_SPEED;
  36int core_compression_level;
  37int core_compression_seen;
  38int fsync_object_files;
  39size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  40size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  41size_t delta_base_cache_limit = 96 * 1024 * 1024;
  42unsigned long big_file_threshold = 512 * 1024 * 1024;
  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 check_replace_refs = 1;
  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() */
  65struct startup_info *startup_info;
  66unsigned long pack_size_limit_cfg;
  67
  68#ifndef PROTECT_HFS_DEFAULT
  69#define PROTECT_HFS_DEFAULT 0
  70#endif
  71int protect_hfs = PROTECT_HFS_DEFAULT;
  72
  73#ifndef PROTECT_NTFS_DEFAULT
  74#define PROTECT_NTFS_DEFAULT 0
  75#endif
  76int protect_ntfs = PROTECT_NTFS_DEFAULT;
  77
  78/*
  79 * The character that begins a commented line in user-editable file
  80 * that is subject to stripspace.
  81 */
  82char comment_line_char = '#';
  83int auto_comment_line_char;
  84
  85/* Parallel index stat data preload? */
  86int core_preload_index = 1;
  87
  88/* This is set by setup_git_dir_gently() and/or git_default_config() */
  89char *git_work_tree_cfg;
  90static char *work_tree;
  91
  92static const char *namespace;
  93static size_t namespace_len;
  94
  95static const char *git_dir, *git_common_dir;
  96static char *git_object_dir, *git_index_file, *git_graft_file;
  97int git_db_env, git_index_env, git_graft_env, git_common_dir_env;
  98
  99/*
 100 * Repository-local GIT_* environment variables; see cache.h for details.
 101 */
 102const char * const local_repo_env[] = {
 103        ALTERNATE_DB_ENVIRONMENT,
 104        CONFIG_ENVIRONMENT,
 105        CONFIG_DATA_ENVIRONMENT,
 106        DB_ENVIRONMENT,
 107        GIT_DIR_ENVIRONMENT,
 108        GIT_WORK_TREE_ENVIRONMENT,
 109        GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
 110        GRAFT_ENVIRONMENT,
 111        INDEX_ENVIRONMENT,
 112        NO_REPLACE_OBJECTS_ENVIRONMENT,
 113        GIT_PREFIX_ENVIRONMENT,
 114        GIT_SHALLOW_FILE_ENVIRONMENT,
 115        GIT_COMMON_DIR_ENVIRONMENT,
 116        NULL
 117};
 118
 119static char *expand_namespace(const char *raw_namespace)
 120{
 121        struct strbuf buf = STRBUF_INIT;
 122        struct strbuf **components, **c;
 123
 124        if (!raw_namespace || !*raw_namespace)
 125                return xstrdup("");
 126
 127        strbuf_addstr(&buf, raw_namespace);
 128        components = strbuf_split(&buf, '/');
 129        strbuf_reset(&buf);
 130        for (c = components; *c; c++)
 131                if (strcmp((*c)->buf, "/") != 0)
 132                        strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 133        strbuf_list_free(components);
 134        if (check_refname_format(buf.buf, 0))
 135                die("bad git namespace path \"%s\"", raw_namespace);
 136        strbuf_addch(&buf, '/');
 137        return strbuf_detach(&buf, NULL);
 138}
 139
 140static char *git_path_from_env(const char *envvar, const char *git_dir,
 141                               const char *path, int *fromenv)
 142{
 143        const char *value = getenv(envvar);
 144        if (!value) {
 145                char *buf = xmalloc(strlen(git_dir) + strlen(path) + 2);
 146                sprintf(buf, "%s/%s", git_dir, path);
 147                return buf;
 148        }
 149        if (fromenv)
 150                *fromenv = 1;
 151        return xstrdup(value);
 152}
 153
 154static void setup_git_env(void)
 155{
 156        struct strbuf sb = STRBUF_INIT;
 157        const char *gitfile;
 158        const char *shallow_file;
 159
 160        git_dir = getenv(GIT_DIR_ENVIRONMENT);
 161        if (!git_dir)
 162                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
 163        gitfile = read_gitfile(git_dir);
 164        git_dir = xstrdup(gitfile ? gitfile : git_dir);
 165        if (get_common_dir(&sb, git_dir))
 166                git_common_dir_env = 1;
 167        git_common_dir = strbuf_detach(&sb, NULL);
 168        git_object_dir = git_path_from_env(DB_ENVIRONMENT, git_common_dir,
 169                                           "objects", &git_db_env);
 170        git_index_file = git_path_from_env(INDEX_ENVIRONMENT, git_dir,
 171                                           "index", &git_index_env);
 172        git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, git_common_dir,
 173                                           "info/grafts", &git_graft_env);
 174        if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 175                check_replace_refs = 0;
 176        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 177        namespace_len = strlen(namespace);
 178        shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
 179        if (shallow_file)
 180                set_alternate_shallow_file(shallow_file, 0);
 181}
 182
 183int is_bare_repository(void)
 184{
 185        /* if core.bare is not 'false', let's see if there is a work tree */
 186        return is_bare_repository_cfg && !get_git_work_tree();
 187}
 188
 189const char *get_git_dir(void)
 190{
 191        if (!git_dir)
 192                setup_git_env();
 193        return git_dir;
 194}
 195
 196const char *get_git_common_dir(void)
 197{
 198        return git_common_dir;
 199}
 200
 201const char *get_git_namespace(void)
 202{
 203        if (!namespace)
 204                setup_git_env();
 205        return namespace;
 206}
 207
 208const char *strip_namespace(const char *namespaced_ref)
 209{
 210        if (!starts_with(namespaced_ref, get_git_namespace()))
 211                return NULL;
 212        return namespaced_ref + namespace_len;
 213}
 214
 215static int git_work_tree_initialized;
 216
 217/*
 218 * Note.  This works only before you used a work tree.  This was added
 219 * primarily to support git-clone to work in a new repository it just
 220 * created, and is not meant to flip between different work trees.
 221 */
 222void set_git_work_tree(const char *new_work_tree)
 223{
 224        if (git_work_tree_initialized) {
 225                new_work_tree = real_path(new_work_tree);
 226                if (strcmp(new_work_tree, work_tree))
 227                        die("internal error: work tree has already been set\n"
 228                            "Current worktree: %s\nNew worktree: %s",
 229                            work_tree, new_work_tree);
 230                return;
 231        }
 232        git_work_tree_initialized = 1;
 233        work_tree = xstrdup(real_path(new_work_tree));
 234}
 235
 236const char *get_git_work_tree(void)
 237{
 238        return work_tree;
 239}
 240
 241char *get_object_directory(void)
 242{
 243        if (!git_object_dir)
 244                setup_git_env();
 245        return git_object_dir;
 246}
 247
 248int odb_mkstemp(char *template, size_t limit, const char *pattern)
 249{
 250        int fd;
 251        /*
 252         * we let the umask do its job, don't try to be more
 253         * restrictive except to remove write permission.
 254         */
 255        int mode = 0444;
 256        snprintf(template, limit, "%s/%s",
 257                 get_object_directory(), pattern);
 258        fd = git_mkstemp_mode(template, mode);
 259        if (0 <= fd)
 260                return fd;
 261
 262        /* slow path */
 263        /* some mkstemp implementations erase template on failure */
 264        snprintf(template, limit, "%s/%s",
 265                 get_object_directory(), pattern);
 266        safe_create_leading_directories(template);
 267        return xmkstemp_mode(template, mode);
 268}
 269
 270int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1)
 271{
 272        int fd;
 273
 274        snprintf(name, namesz, "%s/pack/pack-%s.keep",
 275                 get_object_directory(), sha1_to_hex(sha1));
 276        fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 277        if (0 <= fd)
 278                return fd;
 279
 280        /* slow path */
 281        safe_create_leading_directories(name);
 282        return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 283}
 284
 285char *get_index_file(void)
 286{
 287        if (!git_index_file)
 288                setup_git_env();
 289        return git_index_file;
 290}
 291
 292char *get_graft_file(void)
 293{
 294        if (!git_graft_file)
 295                setup_git_env();
 296        return git_graft_file;
 297}
 298
 299int set_git_dir(const char *path)
 300{
 301        if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 302                return error("Could not set GIT_DIR to '%s'", path);
 303        setup_git_env();
 304        return 0;
 305}
 306
 307const char *get_log_output_encoding(void)
 308{
 309        return git_log_output_encoding ? git_log_output_encoding
 310                : get_commit_output_encoding();
 311}
 312
 313const char *get_commit_output_encoding(void)
 314{
 315        return git_commit_encoding ? git_commit_encoding : "UTF-8";
 316}