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;
  50char *git_replace_ref_base;
  51enum eol core_eol = EOL_UNSET;
  52enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
  53unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  54enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  55enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  56enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
  57#ifndef OBJECT_CREATION_MODE
  58#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
  59#endif
  60enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
  61char *notes_ref_name;
  62int grafts_replace_parents = 1;
  63int core_apply_sparse_checkout;
  64int merge_log_config = -1;
  65int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
  66struct startup_info *startup_info;
  67unsigned long pack_size_limit_cfg;
  68
  69#ifndef PROTECT_HFS_DEFAULT
  70#define PROTECT_HFS_DEFAULT 0
  71#endif
  72int protect_hfs = PROTECT_HFS_DEFAULT;
  73
  74#ifndef PROTECT_NTFS_DEFAULT
  75#define PROTECT_NTFS_DEFAULT 0
  76#endif
  77int protect_ntfs = PROTECT_NTFS_DEFAULT;
  78
  79/*
  80 * The character that begins a commented line in user-editable file
  81 * that is subject to stripspace.
  82 */
  83char comment_line_char = '#';
  84int auto_comment_line_char;
  85
  86/* Parallel index stat data preload? */
  87int core_preload_index = 1;
  88
  89/* This is set by setup_git_dir_gently() and/or git_default_config() */
  90char *git_work_tree_cfg;
  91static char *work_tree;
  92
  93static const char *namespace;
  94static size_t namespace_len;
  95
  96static const char *git_dir, *git_common_dir;
  97static char *git_object_dir, *git_index_file, *git_graft_file;
  98int git_db_env, git_index_env, git_graft_env, git_common_dir_env;
  99
 100/*
 101 * Repository-local GIT_* environment variables; see cache.h for details.
 102 */
 103const char * const local_repo_env[] = {
 104        ALTERNATE_DB_ENVIRONMENT,
 105        CONFIG_ENVIRONMENT,
 106        CONFIG_DATA_ENVIRONMENT,
 107        DB_ENVIRONMENT,
 108        GIT_DIR_ENVIRONMENT,
 109        GIT_WORK_TREE_ENVIRONMENT,
 110        GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
 111        GRAFT_ENVIRONMENT,
 112        INDEX_ENVIRONMENT,
 113        NO_REPLACE_OBJECTS_ENVIRONMENT,
 114        GIT_REPLACE_REF_BASE_ENVIRONMENT,
 115        GIT_PREFIX_ENVIRONMENT,
 116        GIT_SHALLOW_FILE_ENVIRONMENT,
 117        GIT_COMMON_DIR_ENVIRONMENT,
 118        NULL
 119};
 120
 121static char *expand_namespace(const char *raw_namespace)
 122{
 123        struct strbuf buf = STRBUF_INIT;
 124        struct strbuf **components, **c;
 125
 126        if (!raw_namespace || !*raw_namespace)
 127                return xstrdup("");
 128
 129        strbuf_addstr(&buf, raw_namespace);
 130        components = strbuf_split(&buf, '/');
 131        strbuf_reset(&buf);
 132        for (c = components; *c; c++)
 133                if (strcmp((*c)->buf, "/") != 0)
 134                        strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 135        strbuf_list_free(components);
 136        if (check_refname_format(buf.buf, 0))
 137                die("bad git namespace path \"%s\"", raw_namespace);
 138        strbuf_addch(&buf, '/');
 139        return strbuf_detach(&buf, NULL);
 140}
 141
 142static char *git_path_from_env(const char *envvar, const char *git_dir,
 143                               const char *path, int *fromenv)
 144{
 145        const char *value = getenv(envvar);
 146        if (!value) {
 147                char *buf = xmalloc(strlen(git_dir) + strlen(path) + 2);
 148                sprintf(buf, "%s/%s", git_dir, path);
 149                return buf;
 150        }
 151        if (fromenv)
 152                *fromenv = 1;
 153        return xstrdup(value);
 154}
 155
 156static void setup_git_env(void)
 157{
 158        struct strbuf sb = STRBUF_INIT;
 159        const char *gitfile;
 160        const char *shallow_file;
 161        const char *replace_ref_base;
 162
 163        git_dir = getenv(GIT_DIR_ENVIRONMENT);
 164        if (!git_dir)
 165                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
 166        gitfile = read_gitfile(git_dir);
 167        git_dir = xstrdup(gitfile ? gitfile : git_dir);
 168        if (get_common_dir(&sb, git_dir))
 169                git_common_dir_env = 1;
 170        git_common_dir = strbuf_detach(&sb, NULL);
 171        git_object_dir = git_path_from_env(DB_ENVIRONMENT, git_common_dir,
 172                                           "objects", &git_db_env);
 173        git_index_file = git_path_from_env(INDEX_ENVIRONMENT, git_dir,
 174                                           "index", &git_index_env);
 175        git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, git_common_dir,
 176                                           "info/grafts", &git_graft_env);
 177        if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 178                check_replace_refs = 0;
 179        replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
 180        git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
 181                                                          : "refs/replace/");
 182        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 183        namespace_len = strlen(namespace);
 184        shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
 185        if (shallow_file)
 186                set_alternate_shallow_file(shallow_file, 0);
 187}
 188
 189int is_bare_repository(void)
 190{
 191        /* if core.bare is not 'false', let's see if there is a work tree */
 192        return is_bare_repository_cfg && !get_git_work_tree();
 193}
 194
 195const char *get_git_dir(void)
 196{
 197        if (!git_dir)
 198                setup_git_env();
 199        return git_dir;
 200}
 201
 202const char *get_git_common_dir(void)
 203{
 204        return git_common_dir;
 205}
 206
 207const char *get_git_namespace(void)
 208{
 209        if (!namespace)
 210                setup_git_env();
 211        return namespace;
 212}
 213
 214const char *strip_namespace(const char *namespaced_ref)
 215{
 216        if (!starts_with(namespaced_ref, get_git_namespace()))
 217                return NULL;
 218        return namespaced_ref + namespace_len;
 219}
 220
 221static int git_work_tree_initialized;
 222
 223/*
 224 * Note.  This works only before you used a work tree.  This was added
 225 * primarily to support git-clone to work in a new repository it just
 226 * created, and is not meant to flip between different work trees.
 227 */
 228void set_git_work_tree(const char *new_work_tree)
 229{
 230        if (git_work_tree_initialized) {
 231                new_work_tree = real_path(new_work_tree);
 232                if (strcmp(new_work_tree, work_tree))
 233                        die("internal error: work tree has already been set\n"
 234                            "Current worktree: %s\nNew worktree: %s",
 235                            work_tree, new_work_tree);
 236                return;
 237        }
 238        git_work_tree_initialized = 1;
 239        work_tree = xstrdup(real_path(new_work_tree));
 240        if (setenv(GIT_WORK_TREE_ENVIRONMENT, work_tree, 1))
 241                die("could not set GIT_WORK_TREE to '%s'", 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}