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