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;
  36const char *git_hooks_path;
  37int zlib_compression_level = Z_BEST_SPEED;
  38int core_compression_level;
  39int core_compression_seen;
  40int fsync_object_files;
  41size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  42size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  43size_t delta_base_cache_limit = 96 * 1024 * 1024;
  44unsigned long big_file_threshold = 512 * 1024 * 1024;
  45const char *pager_program;
  46int pager_use_color = 1;
  47const char *editor_program;
  48const char *askpass_program;
  49const char *excludes_file;
  50enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
  51int check_replace_refs = 1;
  52char *git_replace_ref_base;
  53enum eol core_eol = EOL_UNSET;
  54enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
  55unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  56enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  57enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  58enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
  59#ifndef OBJECT_CREATION_MODE
  60#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
  61#endif
  62enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
  63char *notes_ref_name;
  64int grafts_replace_parents = 1;
  65int core_apply_sparse_checkout;
  66int merge_log_config = -1;
  67int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
  68struct startup_info *startup_info;
  69unsigned long pack_size_limit_cfg;
  70
  71#ifndef PROTECT_HFS_DEFAULT
  72#define PROTECT_HFS_DEFAULT 0
  73#endif
  74int protect_hfs = PROTECT_HFS_DEFAULT;
  75
  76#ifndef PROTECT_NTFS_DEFAULT
  77#define PROTECT_NTFS_DEFAULT 0
  78#endif
  79int protect_ntfs = PROTECT_NTFS_DEFAULT;
  80
  81/*
  82 * The character that begins a commented line in user-editable file
  83 * that is subject to stripspace.
  84 */
  85char comment_line_char = '#';
  86int auto_comment_line_char;
  87
  88/* Parallel index stat data preload? */
  89int core_preload_index = 1;
  90
  91/*
  92 * This is a hack for test programs like test-dump-untracked-cache to
  93 * ensure that they do not modify the untracked cache when reading it.
  94 * Do not use it otherwise!
  95 */
  96int ignore_untracked_cache_config;
  97
  98/* This is set by setup_git_dir_gently() and/or git_default_config() */
  99char *git_work_tree_cfg;
 100static char *work_tree;
 101
 102static const char *namespace;
 103static size_t namespace_len;
 104
 105static const char *git_dir, *git_common_dir;
 106static char *git_object_dir, *git_index_file, *git_graft_file;
 107int git_db_env, git_index_env, git_graft_env, git_common_dir_env;
 108
 109/*
 110 * Repository-local GIT_* environment variables; see cache.h for details.
 111 */
 112const char * const local_repo_env[] = {
 113        ALTERNATE_DB_ENVIRONMENT,
 114        CONFIG_ENVIRONMENT,
 115        CONFIG_DATA_ENVIRONMENT,
 116        DB_ENVIRONMENT,
 117        GIT_DIR_ENVIRONMENT,
 118        GIT_WORK_TREE_ENVIRONMENT,
 119        GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
 120        GRAFT_ENVIRONMENT,
 121        INDEX_ENVIRONMENT,
 122        NO_REPLACE_OBJECTS_ENVIRONMENT,
 123        GIT_REPLACE_REF_BASE_ENVIRONMENT,
 124        GIT_PREFIX_ENVIRONMENT,
 125        GIT_SHALLOW_FILE_ENVIRONMENT,
 126        GIT_COMMON_DIR_ENVIRONMENT,
 127        NULL
 128};
 129
 130static char *expand_namespace(const char *raw_namespace)
 131{
 132        struct strbuf buf = STRBUF_INIT;
 133        struct strbuf **components, **c;
 134
 135        if (!raw_namespace || !*raw_namespace)
 136                return xstrdup("");
 137
 138        strbuf_addstr(&buf, raw_namespace);
 139        components = strbuf_split(&buf, '/');
 140        strbuf_reset(&buf);
 141        for (c = components; *c; c++)
 142                if (strcmp((*c)->buf, "/") != 0)
 143                        strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 144        strbuf_list_free(components);
 145        if (check_refname_format(buf.buf, 0))
 146                die("bad git namespace path \"%s\"", raw_namespace);
 147        strbuf_addch(&buf, '/');
 148        return strbuf_detach(&buf, NULL);
 149}
 150
 151static char *git_path_from_env(const char *envvar, const char *git_dir,
 152                               const char *path, int *fromenv)
 153{
 154        const char *value = getenv(envvar);
 155        if (!value)
 156                return xstrfmt("%s/%s", git_dir, path);
 157        if (fromenv)
 158                *fromenv = 1;
 159        return xstrdup(value);
 160}
 161
 162static void setup_git_env(void)
 163{
 164        struct strbuf sb = STRBUF_INIT;
 165        const char *gitfile;
 166        const char *shallow_file;
 167        const char *replace_ref_base;
 168
 169        git_dir = getenv(GIT_DIR_ENVIRONMENT);
 170        if (!git_dir)
 171                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
 172        gitfile = read_gitfile(git_dir);
 173        git_dir = xstrdup(gitfile ? gitfile : git_dir);
 174        if (get_common_dir(&sb, git_dir))
 175                git_common_dir_env = 1;
 176        git_common_dir = strbuf_detach(&sb, NULL);
 177        git_object_dir = git_path_from_env(DB_ENVIRONMENT, git_common_dir,
 178                                           "objects", &git_db_env);
 179        git_index_file = git_path_from_env(INDEX_ENVIRONMENT, git_dir,
 180                                           "index", &git_index_env);
 181        git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, git_common_dir,
 182                                           "info/grafts", &git_graft_env);
 183        if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 184                check_replace_refs = 0;
 185        replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
 186        git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
 187                                                          : "refs/replace/");
 188        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 189        namespace_len = strlen(namespace);
 190        shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
 191        if (shallow_file)
 192                set_alternate_shallow_file(shallow_file, 0);
 193}
 194
 195int is_bare_repository(void)
 196{
 197        /* if core.bare is not 'false', let's see if there is a work tree */
 198        return is_bare_repository_cfg && !get_git_work_tree();
 199}
 200
 201const char *get_git_dir(void)
 202{
 203        if (!git_dir)
 204                setup_git_env();
 205        return git_dir;
 206}
 207
 208const char *get_git_common_dir(void)
 209{
 210        return git_common_dir;
 211}
 212
 213const char *get_git_namespace(void)
 214{
 215        if (!namespace)
 216                setup_git_env();
 217        return namespace;
 218}
 219
 220const char *strip_namespace(const char *namespaced_ref)
 221{
 222        if (!starts_with(namespaced_ref, get_git_namespace()))
 223                return NULL;
 224        return namespaced_ref + namespace_len;
 225}
 226
 227static int git_work_tree_initialized;
 228
 229/*
 230 * Note.  This works only before you used a work tree.  This was added
 231 * primarily to support git-clone to work in a new repository it just
 232 * created, and is not meant to flip between different work trees.
 233 */
 234void set_git_work_tree(const char *new_work_tree)
 235{
 236        if (git_work_tree_initialized) {
 237                new_work_tree = real_path(new_work_tree);
 238                if (strcmp(new_work_tree, work_tree))
 239                        die("internal error: work tree has already been set\n"
 240                            "Current worktree: %s\nNew worktree: %s",
 241                            work_tree, new_work_tree);
 242                return;
 243        }
 244        git_work_tree_initialized = 1;
 245        work_tree = xstrdup(real_path(new_work_tree));
 246}
 247
 248const char *get_git_work_tree(void)
 249{
 250        return work_tree;
 251}
 252
 253char *get_object_directory(void)
 254{
 255        if (!git_object_dir)
 256                setup_git_env();
 257        return git_object_dir;
 258}
 259
 260int odb_mkstemp(char *template, size_t limit, const char *pattern)
 261{
 262        int fd;
 263        /*
 264         * we let the umask do its job, don't try to be more
 265         * restrictive except to remove write permission.
 266         */
 267        int mode = 0444;
 268        snprintf(template, limit, "%s/%s",
 269                 get_object_directory(), pattern);
 270        fd = git_mkstemp_mode(template, mode);
 271        if (0 <= fd)
 272                return fd;
 273
 274        /* slow path */
 275        /* some mkstemp implementations erase template on failure */
 276        snprintf(template, limit, "%s/%s",
 277                 get_object_directory(), pattern);
 278        safe_create_leading_directories(template);
 279        return xmkstemp_mode(template, mode);
 280}
 281
 282int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1)
 283{
 284        int fd;
 285
 286        snprintf(name, namesz, "%s/pack/pack-%s.keep",
 287                 get_object_directory(), sha1_to_hex(sha1));
 288        fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 289        if (0 <= fd)
 290                return fd;
 291
 292        /* slow path */
 293        safe_create_leading_directories(name);
 294        return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 295}
 296
 297char *get_index_file(void)
 298{
 299        if (!git_index_file)
 300                setup_git_env();
 301        return git_index_file;
 302}
 303
 304char *get_graft_file(void)
 305{
 306        if (!git_graft_file)
 307                setup_git_env();
 308        return git_graft_file;
 309}
 310
 311int set_git_dir(const char *path)
 312{
 313        if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 314                return error("Could not set GIT_DIR to '%s'", path);
 315        setup_git_env();
 316        return 0;
 317}
 318
 319const char *get_log_output_encoding(void)
 320{
 321        return git_log_output_encoding ? git_log_output_encoding
 322                : get_commit_output_encoding();
 323}
 324
 325const char *get_commit_output_encoding(void)
 326{
 327        return git_commit_encoding ? git_commit_encoding : "UTF-8";
 328}