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 has_symlinks = 1;
  17int minimum_abbrev = 4, default_abbrev = 7;
  18int ignore_case;
  19int assume_unchanged;
  20int prefer_symlink_refs;
  21int is_bare_repository_cfg = -1; /* unspecified */
  22int log_all_ref_updates = -1; /* unspecified */
  23int warn_ambiguous_refs = 1;
  24int repository_format_version;
  25const char *git_commit_encoding;
  26const char *git_log_output_encoding;
  27int shared_repository = PERM_UMASK;
  28const char *apply_default_whitespace;
  29const char *apply_default_ignorewhitespace;
  30const char *git_attributes_file;
  31int zlib_compression_level = Z_BEST_SPEED;
  32int core_compression_level;
  33int core_compression_seen;
  34int fsync_object_files;
  35size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  36size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  37size_t delta_base_cache_limit = 16 * 1024 * 1024;
  38unsigned long big_file_threshold = 512 * 1024 * 1024;
  39const char *log_pack_access;
  40const char *pager_program;
  41int pager_use_color = 1;
  42const char *editor_program;
  43const char *askpass_program;
  44const char *excludes_file;
  45enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
  46int read_replace_refs = 1; /* NEEDSWORK: rename to use_replace_refs */
  47enum eol core_eol = EOL_UNSET;
  48enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
  49unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  50enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  51enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  52enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
  53#ifndef OBJECT_CREATION_MODE
  54#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
  55#endif
  56enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
  57char *notes_ref_name;
  58int grafts_replace_parents = 1;
  59int core_apply_sparse_checkout;
  60int merge_log_config = -1;
  61int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
  62struct startup_info *startup_info;
  63unsigned long pack_size_limit_cfg;
  64
  65/* Parallel index stat data preload? */
  66int core_preload_index = 0;
  67
  68/* This is set by setup_git_dir_gently() and/or git_default_config() */
  69char *git_work_tree_cfg;
  70static char *work_tree;
  71
  72static const char *namespace;
  73static size_t namespace_len;
  74
  75static const char *git_dir;
  76static char *git_object_dir, *git_index_file, *git_graft_file;
  77
  78/*
  79 * Repository-local GIT_* environment variables
  80 * Remember to update local_repo_env_size in cache.h when
  81 * the size of the list changes
  82 */
  83const char * const local_repo_env[LOCAL_REPO_ENV_SIZE + 1] = {
  84        ALTERNATE_DB_ENVIRONMENT,
  85        CONFIG_ENVIRONMENT,
  86        CONFIG_DATA_ENVIRONMENT,
  87        DB_ENVIRONMENT,
  88        GIT_DIR_ENVIRONMENT,
  89        GIT_WORK_TREE_ENVIRONMENT,
  90        GRAFT_ENVIRONMENT,
  91        INDEX_ENVIRONMENT,
  92        NO_REPLACE_OBJECTS_ENVIRONMENT,
  93        NULL
  94};
  95
  96static char *expand_namespace(const char *raw_namespace)
  97{
  98        struct strbuf buf = STRBUF_INIT;
  99        struct strbuf **components, **c;
 100
 101        if (!raw_namespace || !*raw_namespace)
 102                return xstrdup("");
 103
 104        strbuf_addstr(&buf, raw_namespace);
 105        components = strbuf_split(&buf, '/');
 106        strbuf_reset(&buf);
 107        for (c = components; *c; c++)
 108                if (strcmp((*c)->buf, "/") != 0)
 109                        strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 110        strbuf_list_free(components);
 111        if (check_refname_format(buf.buf, 0))
 112                die("bad git namespace path \"%s\"", raw_namespace);
 113        strbuf_addch(&buf, '/');
 114        return strbuf_detach(&buf, NULL);
 115}
 116
 117static void setup_git_env(void)
 118{
 119        git_dir = getenv(GIT_DIR_ENVIRONMENT);
 120        git_dir = git_dir ? xstrdup(git_dir) : NULL;
 121        if (!git_dir) {
 122                git_dir = read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
 123                git_dir = git_dir ? xstrdup(git_dir) : NULL;
 124        }
 125        if (!git_dir)
 126                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
 127        git_object_dir = getenv(DB_ENVIRONMENT);
 128        if (!git_object_dir) {
 129                git_object_dir = xmalloc(strlen(git_dir) + 9);
 130                sprintf(git_object_dir, "%s/objects", git_dir);
 131        }
 132        git_index_file = getenv(INDEX_ENVIRONMENT);
 133        if (!git_index_file) {
 134                git_index_file = xmalloc(strlen(git_dir) + 7);
 135                sprintf(git_index_file, "%s/index", git_dir);
 136        }
 137        git_graft_file = getenv(GRAFT_ENVIRONMENT);
 138        if (!git_graft_file)
 139                git_graft_file = git_pathdup("info/grafts");
 140        if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 141                read_replace_refs = 0;
 142        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 143        namespace_len = strlen(namespace);
 144}
 145
 146int is_bare_repository(void)
 147{
 148        /* if core.bare is not 'false', let's see if there is a work tree */
 149        return is_bare_repository_cfg && !get_git_work_tree();
 150}
 151
 152int have_git_dir(void)
 153{
 154        return !!git_dir;
 155}
 156
 157const char *get_git_dir(void)
 158{
 159        if (!git_dir)
 160                setup_git_env();
 161        return git_dir;
 162}
 163
 164const char *get_git_namespace(void)
 165{
 166        if (!namespace)
 167                setup_git_env();
 168        return namespace;
 169}
 170
 171const char *strip_namespace(const char *namespaced_ref)
 172{
 173        if (prefixcmp(namespaced_ref, get_git_namespace()) != 0)
 174                return NULL;
 175        return namespaced_ref + namespace_len;
 176}
 177
 178static int git_work_tree_initialized;
 179
 180/*
 181 * Note.  This works only before you used a work tree.  This was added
 182 * primarily to support git-clone to work in a new repository it just
 183 * created, and is not meant to flip between different work trees.
 184 */
 185void set_git_work_tree(const char *new_work_tree)
 186{
 187        if (git_work_tree_initialized) {
 188                new_work_tree = real_path(new_work_tree);
 189                if (strcmp(new_work_tree, work_tree))
 190                        die("internal error: work tree has already been set\n"
 191                            "Current worktree: %s\nNew worktree: %s",
 192                            work_tree, new_work_tree);
 193                return;
 194        }
 195        git_work_tree_initialized = 1;
 196        work_tree = xstrdup(real_path(new_work_tree));
 197}
 198
 199const char *get_git_work_tree(void)
 200{
 201        return work_tree;
 202}
 203
 204char *get_object_directory(void)
 205{
 206        if (!git_object_dir)
 207                setup_git_env();
 208        return git_object_dir;
 209}
 210
 211int odb_mkstemp(char *template, size_t limit, const char *pattern)
 212{
 213        int fd;
 214        /*
 215         * we let the umask do its job, don't try to be more
 216         * restrictive except to remove write permission.
 217         */
 218        int mode = 0444;
 219        snprintf(template, limit, "%s/%s",
 220                 get_object_directory(), pattern);
 221        fd = git_mkstemp_mode(template, mode);
 222        if (0 <= fd)
 223                return fd;
 224
 225        /* slow path */
 226        /* some mkstemp implementations erase template on failure */
 227        snprintf(template, limit, "%s/%s",
 228                 get_object_directory(), pattern);
 229        safe_create_leading_directories(template);
 230        return xmkstemp_mode(template, mode);
 231}
 232
 233int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1)
 234{
 235        int fd;
 236
 237        snprintf(name, namesz, "%s/pack/pack-%s.keep",
 238                 get_object_directory(), sha1_to_hex(sha1));
 239        fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 240        if (0 <= fd)
 241                return fd;
 242
 243        /* slow path */
 244        safe_create_leading_directories(name);
 245        return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 246}
 247
 248char *get_index_file(void)
 249{
 250        if (!git_index_file)
 251                setup_git_env();
 252        return git_index_file;
 253}
 254
 255char *get_graft_file(void)
 256{
 257        if (!git_graft_file)
 258                setup_git_env();
 259        return git_graft_file;
 260}
 261
 262int set_git_dir(const char *path)
 263{
 264        if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 265                return error("Could not set GIT_DIR to '%s'", path);
 266        setup_git_env();
 267        return 0;
 268}
 269
 270const char *get_log_output_encoding(void)
 271{
 272        return git_log_output_encoding ? git_log_output_encoding
 273                : get_commit_output_encoding();
 274}
 275
 276const char *get_commit_output_encoding(void)
 277{
 278        return git_commit_encoding ? git_commit_encoding : "UTF-8";
 279}