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;
  29int repository_format_precious_objects;
  30const char *git_commit_encoding;
  31const char *git_log_output_encoding;
  32int shared_repository = PERM_UMASK;
  33const char *apply_default_whitespace;
  34const char *apply_default_ignorewhitespace;
  35const char *git_attributes_file;
  36int zlib_compression_level = Z_BEST_SPEED;
  37int core_compression_level;
  38int core_compression_seen;
  39int fsync_object_files;
  40size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  41size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  42size_t delta_base_cache_limit = 96 * 1024 * 1024;
  43unsigned long big_file_threshold = 512 * 1024 * 1024;
  44const char *pager_program;
  45int pager_use_color = 1;
  46const char *editor_program;
  47const char *askpass_program;
  48const char *excludes_file;
  49enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
  50int check_replace_refs = 1;
  51char *git_replace_ref_base;
  52enum eol core_eol = EOL_UNSET;
  53enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
  54unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  55enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  56enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  57enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
  58#ifndef OBJECT_CREATION_MODE
  59#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
  60#endif
  61enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
  62char *notes_ref_name;
  63int grafts_replace_parents = 1;
  64int core_apply_sparse_checkout;
  65int merge_log_config = -1;
  66int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
  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/*
  90 * This is a hack for test programs like test-dump-untracked-cache to
  91 * ensure that they do not modify the untracked cache when reading it.
  92 * Do not use it otherwise!
  93 */
  94int ignore_untracked_cache_config;
  95
  96/* This is set by setup_git_dir_gently() and/or git_default_config() */
  97char *git_work_tree_cfg;
  98static char *work_tree;
  99
 100static const char *namespace;
 101static size_t namespace_len;
 102
 103static const char *git_dir, *git_common_dir;
 104static char *git_object_dir, *git_index_file, *git_graft_file;
 105int git_db_env, git_index_env, git_graft_env, git_common_dir_env;
 106
 107/*
 108 * Repository-local GIT_* environment variables; see cache.h for details.
 109 */
 110const char * const local_repo_env[] = {
 111        ALTERNATE_DB_ENVIRONMENT,
 112        CONFIG_ENVIRONMENT,
 113        CONFIG_DATA_ENVIRONMENT,
 114        DB_ENVIRONMENT,
 115        GIT_DIR_ENVIRONMENT,
 116        GIT_WORK_TREE_ENVIRONMENT,
 117        GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
 118        GRAFT_ENVIRONMENT,
 119        INDEX_ENVIRONMENT,
 120        NO_REPLACE_OBJECTS_ENVIRONMENT,
 121        GIT_REPLACE_REF_BASE_ENVIRONMENT,
 122        GIT_PREFIX_ENVIRONMENT,
 123        GIT_SHALLOW_FILE_ENVIRONMENT,
 124        GIT_COMMON_DIR_ENVIRONMENT,
 125        NULL
 126};
 127
 128static char *expand_namespace(const char *raw_namespace)
 129{
 130        struct strbuf buf = STRBUF_INIT;
 131        struct strbuf **components, **c;
 132
 133        if (!raw_namespace || !*raw_namespace)
 134                return xstrdup("");
 135
 136        strbuf_addstr(&buf, raw_namespace);
 137        components = strbuf_split(&buf, '/');
 138        strbuf_reset(&buf);
 139        for (c = components; *c; c++)
 140                if (strcmp((*c)->buf, "/") != 0)
 141                        strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 142        strbuf_list_free(components);
 143        if (check_refname_format(buf.buf, 0))
 144                die("bad git namespace path \"%s\"", raw_namespace);
 145        strbuf_addch(&buf, '/');
 146        return strbuf_detach(&buf, NULL);
 147}
 148
 149static char *git_path_from_env(const char *envvar, const char *git_dir,
 150                               const char *path, int *fromenv)
 151{
 152        const char *value = getenv(envvar);
 153        if (!value)
 154                return xstrfmt("%s/%s", git_dir, path);
 155        if (fromenv)
 156                *fromenv = 1;
 157        return xstrdup(value);
 158}
 159
 160static void setup_git_env(void)
 161{
 162        struct strbuf sb = STRBUF_INIT;
 163        const char *gitfile;
 164        const char *shallow_file;
 165        const char *replace_ref_base;
 166
 167        git_dir = getenv(GIT_DIR_ENVIRONMENT);
 168        if (!git_dir)
 169                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
 170        gitfile = read_gitfile(git_dir);
 171        git_dir = xstrdup(gitfile ? gitfile : git_dir);
 172        if (get_common_dir(&sb, git_dir))
 173                git_common_dir_env = 1;
 174        git_common_dir = strbuf_detach(&sb, NULL);
 175        git_object_dir = git_path_from_env(DB_ENVIRONMENT, git_common_dir,
 176                                           "objects", &git_db_env);
 177        git_index_file = git_path_from_env(INDEX_ENVIRONMENT, git_dir,
 178                                           "index", &git_index_env);
 179        git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, git_common_dir,
 180                                           "info/grafts", &git_graft_env);
 181        if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 182                check_replace_refs = 0;
 183        replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
 184        git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
 185                                                          : "refs/replace/");
 186        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 187        namespace_len = strlen(namespace);
 188        shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
 189        if (shallow_file)
 190                set_alternate_shallow_file(shallow_file, 0);
 191}
 192
 193int is_bare_repository(void)
 194{
 195        /* if core.bare is not 'false', let's see if there is a work tree */
 196        return is_bare_repository_cfg && !get_git_work_tree();
 197}
 198
 199const char *get_git_dir(void)
 200{
 201        if (!git_dir)
 202                setup_git_env();
 203        return git_dir;
 204}
 205
 206const char *get_git_common_dir(void)
 207{
 208        return git_common_dir;
 209}
 210
 211const char *get_git_namespace(void)
 212{
 213        if (!namespace)
 214                setup_git_env();
 215        return namespace;
 216}
 217
 218const char *strip_namespace(const char *namespaced_ref)
 219{
 220        if (!starts_with(namespaced_ref, get_git_namespace()))
 221                return NULL;
 222        return namespaced_ref + namespace_len;
 223}
 224
 225static int git_work_tree_initialized;
 226
 227/*
 228 * Note.  This works only before you used a work tree.  This was added
 229 * primarily to support git-clone to work in a new repository it just
 230 * created, and is not meant to flip between different work trees.
 231 */
 232void set_git_work_tree(const char *new_work_tree)
 233{
 234        if (git_work_tree_initialized) {
 235                new_work_tree = real_path(new_work_tree);
 236                if (strcmp(new_work_tree, work_tree))
 237                        die("internal error: work tree has already been set\n"
 238                            "Current worktree: %s\nNew worktree: %s",
 239                            work_tree, new_work_tree);
 240                return;
 241        }
 242        git_work_tree_initialized = 1;
 243        work_tree = xstrdup(real_path(new_work_tree));
 244}
 245
 246const char *get_git_work_tree(void)
 247{
 248        return work_tree;
 249}
 250
 251char *get_object_directory(void)
 252{
 253        if (!git_object_dir)
 254                setup_git_env();
 255        return git_object_dir;
 256}
 257
 258int odb_mkstemp(char *template, size_t limit, const char *pattern)
 259{
 260        int fd;
 261        /*
 262         * we let the umask do its job, don't try to be more
 263         * restrictive except to remove write permission.
 264         */
 265        int mode = 0444;
 266        snprintf(template, limit, "%s/%s",
 267                 get_object_directory(), pattern);
 268        fd = git_mkstemp_mode(template, mode);
 269        if (0 <= fd)
 270                return fd;
 271
 272        /* slow path */
 273        /* some mkstemp implementations erase template on failure */
 274        snprintf(template, limit, "%s/%s",
 275                 get_object_directory(), pattern);
 276        safe_create_leading_directories(template);
 277        return xmkstemp_mode(template, mode);
 278}
 279
 280int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1)
 281{
 282        int fd;
 283
 284        snprintf(name, namesz, "%s/pack/pack-%s.keep",
 285                 get_object_directory(), sha1_to_hex(sha1));
 286        fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 287        if (0 <= fd)
 288                return fd;
 289
 290        /* slow path */
 291        safe_create_leading_directories(name);
 292        return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 293}
 294
 295char *get_index_file(void)
 296{
 297        if (!git_index_file)
 298                setup_git_env();
 299        return git_index_file;
 300}
 301
 302char *get_graft_file(void)
 303{
 304        if (!git_graft_file)
 305                setup_git_env();
 306        return git_graft_file;
 307}
 308
 309int set_git_dir(const char *path)
 310{
 311        if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 312                return error("Could not set GIT_DIR to '%s'", path);
 313        setup_git_env();
 314        return 0;
 315}
 316
 317const char *get_log_output_encoding(void)
 318{
 319        return git_log_output_encoding ? git_log_output_encoding
 320                : get_commit_output_encoding();
 321}
 322
 323const char *get_commit_output_encoding(void)
 324{
 325        return git_commit_encoding ? git_commit_encoding : "UTF-8";
 326}