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 repository_format_version;
  28const char *git_commit_encoding;
  29const char *git_log_output_encoding;
  30int shared_repository = PERM_UMASK;
  31const char *apply_default_whitespace;
  32const char *apply_default_ignorewhitespace;
  33const char *git_attributes_file;
  34int zlib_compression_level = Z_BEST_SPEED;
  35int core_compression_level;
  36int core_compression_seen;
  37int fsync_object_files;
  38size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  39size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  40size_t delta_base_cache_limit = 16 * 1024 * 1024;
  41unsigned long big_file_threshold = 512 * 1024 * 1024;
  42const char *pager_program;
  43int pager_use_color = 1;
  44const char *editor_program;
  45const char *askpass_program;
  46const char *excludes_file;
  47enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
  48int check_replace_refs = 1;
  49enum eol core_eol = EOL_UNSET;
  50enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
  51unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  52enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  53enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  54enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
  55#ifndef OBJECT_CREATION_MODE
  56#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
  57#endif
  58enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
  59char *notes_ref_name;
  60int grafts_replace_parents = 1;
  61int core_apply_sparse_checkout;
  62int merge_log_config = -1;
  63int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
  64struct startup_info *startup_info;
  65unsigned long pack_size_limit_cfg;
  66
  67#ifndef PROTECT_HFS_DEFAULT
  68#define PROTECT_HFS_DEFAULT 0
  69#endif
  70int protect_hfs = PROTECT_HFS_DEFAULT;
  71
  72#ifndef PROTECT_NTFS_DEFAULT
  73#define PROTECT_NTFS_DEFAULT 0
  74#endif
  75int protect_ntfs = PROTECT_NTFS_DEFAULT;
  76
  77/*
  78 * The character that begins a commented line in user-editable file
  79 * that is subject to stripspace.
  80 */
  81char comment_line_char = '#';
  82
  83/* Parallel index stat data preload? */
  84int core_preload_index = 0;
  85
  86/* This is set by setup_git_dir_gently() and/or git_default_config() */
  87char *git_work_tree_cfg;
  88static char *work_tree;
  89
  90static const char *namespace;
  91static size_t namespace_len;
  92
  93static const char *git_dir;
  94static char *git_object_dir, *git_index_file, *git_graft_file;
  95
  96/*
  97 * Repository-local GIT_* environment variables; see cache.h for details.
  98 */
  99const char * const local_repo_env[] = {
 100        ALTERNATE_DB_ENVIRONMENT,
 101        CONFIG_ENVIRONMENT,
 102        CONFIG_DATA_ENVIRONMENT,
 103        DB_ENVIRONMENT,
 104        GIT_DIR_ENVIRONMENT,
 105        GIT_WORK_TREE_ENVIRONMENT,
 106        GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
 107        GRAFT_ENVIRONMENT,
 108        INDEX_ENVIRONMENT,
 109        NO_REPLACE_OBJECTS_ENVIRONMENT,
 110        GIT_PREFIX_ENVIRONMENT,
 111        GIT_SHALLOW_FILE_ENVIRONMENT,
 112        NULL
 113};
 114
 115static char *expand_namespace(const char *raw_namespace)
 116{
 117        struct strbuf buf = STRBUF_INIT;
 118        struct strbuf **components, **c;
 119
 120        if (!raw_namespace || !*raw_namespace)
 121                return xstrdup("");
 122
 123        strbuf_addstr(&buf, raw_namespace);
 124        components = strbuf_split(&buf, '/');
 125        strbuf_reset(&buf);
 126        for (c = components; *c; c++)
 127                if (strcmp((*c)->buf, "/") != 0)
 128                        strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 129        strbuf_list_free(components);
 130        if (check_refname_format(buf.buf, 0))
 131                die("bad git namespace path \"%s\"", raw_namespace);
 132        strbuf_addch(&buf, '/');
 133        return strbuf_detach(&buf, NULL);
 134}
 135
 136static void setup_git_env(void)
 137{
 138        const char *gitfile;
 139        const char *shallow_file;
 140
 141        git_dir = getenv(GIT_DIR_ENVIRONMENT);
 142        if (!git_dir)
 143                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
 144        gitfile = read_gitfile(git_dir);
 145        git_dir = xstrdup(gitfile ? gitfile : git_dir);
 146        git_object_dir = getenv(DB_ENVIRONMENT);
 147        if (!git_object_dir) {
 148                git_object_dir = xmalloc(strlen(git_dir) + 9);
 149                sprintf(git_object_dir, "%s/objects", git_dir);
 150        }
 151        git_index_file = getenv(INDEX_ENVIRONMENT);
 152        if (!git_index_file) {
 153                git_index_file = xmalloc(strlen(git_dir) + 7);
 154                sprintf(git_index_file, "%s/index", git_dir);
 155        }
 156        git_graft_file = getenv(GRAFT_ENVIRONMENT);
 157        if (!git_graft_file)
 158                git_graft_file = git_pathdup("info/grafts");
 159        if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 160                check_replace_refs = 0;
 161        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 162        namespace_len = strlen(namespace);
 163        shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
 164        if (shallow_file)
 165                set_alternate_shallow_file(shallow_file, 0);
 166}
 167
 168int is_bare_repository(void)
 169{
 170        /* if core.bare is not 'false', let's see if there is a work tree */
 171        return is_bare_repository_cfg && !get_git_work_tree();
 172}
 173
 174const char *get_git_dir(void)
 175{
 176        if (!git_dir)
 177                setup_git_env();
 178        return git_dir;
 179}
 180
 181const char *get_git_namespace(void)
 182{
 183        if (!namespace)
 184                setup_git_env();
 185        return namespace;
 186}
 187
 188const char *strip_namespace(const char *namespaced_ref)
 189{
 190        if (!starts_with(namespaced_ref, get_git_namespace()))
 191                return NULL;
 192        return namespaced_ref + namespace_len;
 193}
 194
 195static int git_work_tree_initialized;
 196
 197/*
 198 * Note.  This works only before you used a work tree.  This was added
 199 * primarily to support git-clone to work in a new repository it just
 200 * created, and is not meant to flip between different work trees.
 201 */
 202void set_git_work_tree(const char *new_work_tree)
 203{
 204        if (git_work_tree_initialized) {
 205                new_work_tree = real_path(new_work_tree);
 206                if (strcmp(new_work_tree, work_tree))
 207                        die("internal error: work tree has already been set\n"
 208                            "Current worktree: %s\nNew worktree: %s",
 209                            work_tree, new_work_tree);
 210                return;
 211        }
 212        git_work_tree_initialized = 1;
 213        work_tree = xstrdup(real_path(new_work_tree));
 214        if (setenv(GIT_WORK_TREE_ENVIRONMENT, work_tree, 1))
 215                die("could not set GIT_WORK_TREE to '%s'", work_tree);
 216}
 217
 218const char *get_git_work_tree(void)
 219{
 220        return work_tree;
 221}
 222
 223char *get_object_directory(void)
 224{
 225        if (!git_object_dir)
 226                setup_git_env();
 227        return git_object_dir;
 228}
 229
 230int odb_mkstemp(char *template, size_t limit, const char *pattern)
 231{
 232        int fd;
 233        /*
 234         * we let the umask do its job, don't try to be more
 235         * restrictive except to remove write permission.
 236         */
 237        int mode = 0444;
 238        snprintf(template, limit, "%s/%s",
 239                 get_object_directory(), pattern);
 240        fd = git_mkstemp_mode(template, mode);
 241        if (0 <= fd)
 242                return fd;
 243
 244        /* slow path */
 245        /* some mkstemp implementations erase template on failure */
 246        snprintf(template, limit, "%s/%s",
 247                 get_object_directory(), pattern);
 248        safe_create_leading_directories(template);
 249        return xmkstemp_mode(template, mode);
 250}
 251
 252int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1)
 253{
 254        int fd;
 255
 256        snprintf(name, namesz, "%s/pack/pack-%s.keep",
 257                 get_object_directory(), sha1_to_hex(sha1));
 258        fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 259        if (0 <= fd)
 260                return fd;
 261
 262        /* slow path */
 263        safe_create_leading_directories(name);
 264        return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 265}
 266
 267char *get_index_file(void)
 268{
 269        if (!git_index_file)
 270                setup_git_env();
 271        return git_index_file;
 272}
 273
 274char *get_graft_file(void)
 275{
 276        if (!git_graft_file)
 277                setup_git_env();
 278        return git_graft_file;
 279}
 280
 281int set_git_dir(const char *path)
 282{
 283        if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 284                return error("Could not set GIT_DIR to '%s'", path);
 285        setup_git_env();
 286        return 0;
 287}
 288
 289const char *get_log_output_encoding(void)
 290{
 291        return git_log_output_encoding ? git_log_output_encoding
 292                : get_commit_output_encoding();
 293}
 294
 295const char *get_commit_output_encoding(void)
 296{
 297        return git_commit_encoding ? git_commit_encoding : "UTF-8";
 298}