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 = 96 * 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 = '#';
  82int auto_comment_line_char;
  83
  84/* Parallel index stat data preload? */
  85int core_preload_index = 1;
  86
  87/* This is set by setup_git_dir_gently() and/or git_default_config() */
  88char *git_work_tree_cfg;
  89static char *work_tree;
  90
  91static const char *namespace;
  92static size_t namespace_len;
  93
  94static const char *git_dir;
  95static char *git_object_dir, *git_index_file, *git_graft_file;
  96
  97/*
  98 * Repository-local GIT_* environment variables; see cache.h for details.
  99 */
 100const char * const local_repo_env[] = {
 101        ALTERNATE_DB_ENVIRONMENT,
 102        CONFIG_ENVIRONMENT,
 103        CONFIG_DATA_ENVIRONMENT,
 104        DB_ENVIRONMENT,
 105        GIT_DIR_ENVIRONMENT,
 106        GIT_WORK_TREE_ENVIRONMENT,
 107        GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
 108        GRAFT_ENVIRONMENT,
 109        INDEX_ENVIRONMENT,
 110        NO_REPLACE_OBJECTS_ENVIRONMENT,
 111        GIT_PREFIX_ENVIRONMENT,
 112        GIT_SHALLOW_FILE_ENVIRONMENT,
 113        NULL
 114};
 115
 116static char *expand_namespace(const char *raw_namespace)
 117{
 118        struct strbuf buf = STRBUF_INIT;
 119        struct strbuf **components, **c;
 120
 121        if (!raw_namespace || !*raw_namespace)
 122                return xstrdup("");
 123
 124        strbuf_addstr(&buf, raw_namespace);
 125        components = strbuf_split(&buf, '/');
 126        strbuf_reset(&buf);
 127        for (c = components; *c; c++)
 128                if (strcmp((*c)->buf, "/") != 0)
 129                        strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 130        strbuf_list_free(components);
 131        if (check_refname_format(buf.buf, 0))
 132                die("bad git namespace path \"%s\"", raw_namespace);
 133        strbuf_addch(&buf, '/');
 134        return strbuf_detach(&buf, NULL);
 135}
 136
 137static char *git_path_from_env(const char *envvar, const char *path)
 138{
 139        const char *value = getenv(envvar);
 140        return value ? xstrdup(value) : git_pathdup("%s", path);
 141}
 142
 143static void setup_git_env(void)
 144{
 145        const char *gitfile;
 146        const char *shallow_file;
 147
 148        git_dir = getenv(GIT_DIR_ENVIRONMENT);
 149        if (!git_dir)
 150                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
 151        gitfile = read_gitfile(git_dir);
 152        git_dir = xstrdup(gitfile ? gitfile : git_dir);
 153        git_object_dir = git_path_from_env(DB_ENVIRONMENT, "objects");
 154        git_index_file = git_path_from_env(INDEX_ENVIRONMENT, "index");
 155        git_graft_file = git_path_from_env(GRAFT_ENVIRONMENT, "info/grafts");
 156        if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 157                check_replace_refs = 0;
 158        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 159        namespace_len = strlen(namespace);
 160        shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
 161        if (shallow_file)
 162                set_alternate_shallow_file(shallow_file, 0);
 163}
 164
 165int is_bare_repository(void)
 166{
 167        /* if core.bare is not 'false', let's see if there is a work tree */
 168        return is_bare_repository_cfg && !get_git_work_tree();
 169}
 170
 171const char *get_git_dir(void)
 172{
 173        if (!git_dir)
 174                setup_git_env();
 175        return git_dir;
 176}
 177
 178const char *get_git_namespace(void)
 179{
 180        if (!namespace)
 181                setup_git_env();
 182        return namespace;
 183}
 184
 185const char *strip_namespace(const char *namespaced_ref)
 186{
 187        if (!starts_with(namespaced_ref, get_git_namespace()))
 188                return NULL;
 189        return namespaced_ref + namespace_len;
 190}
 191
 192static int git_work_tree_initialized;
 193
 194/*
 195 * Note.  This works only before you used a work tree.  This was added
 196 * primarily to support git-clone to work in a new repository it just
 197 * created, and is not meant to flip between different work trees.
 198 */
 199void set_git_work_tree(const char *new_work_tree)
 200{
 201        if (git_work_tree_initialized) {
 202                new_work_tree = real_path(new_work_tree);
 203                if (strcmp(new_work_tree, work_tree))
 204                        die("internal error: work tree has already been set\n"
 205                            "Current worktree: %s\nNew worktree: %s",
 206                            work_tree, new_work_tree);
 207                return;
 208        }
 209        git_work_tree_initialized = 1;
 210        work_tree = xstrdup(real_path(new_work_tree));
 211}
 212
 213const char *get_git_work_tree(void)
 214{
 215        return work_tree;
 216}
 217
 218char *get_object_directory(void)
 219{
 220        if (!git_object_dir)
 221                setup_git_env();
 222        return git_object_dir;
 223}
 224
 225int odb_mkstemp(char *template, size_t limit, const char *pattern)
 226{
 227        int fd;
 228        /*
 229         * we let the umask do its job, don't try to be more
 230         * restrictive except to remove write permission.
 231         */
 232        int mode = 0444;
 233        snprintf(template, limit, "%s/%s",
 234                 get_object_directory(), pattern);
 235        fd = git_mkstemp_mode(template, mode);
 236        if (0 <= fd)
 237                return fd;
 238
 239        /* slow path */
 240        /* some mkstemp implementations erase template on failure */
 241        snprintf(template, limit, "%s/%s",
 242                 get_object_directory(), pattern);
 243        safe_create_leading_directories(template);
 244        return xmkstemp_mode(template, mode);
 245}
 246
 247int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1)
 248{
 249        int fd;
 250
 251        snprintf(name, namesz, "%s/pack/pack-%s.keep",
 252                 get_object_directory(), sha1_to_hex(sha1));
 253        fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 254        if (0 <= fd)
 255                return fd;
 256
 257        /* slow path */
 258        safe_create_leading_directories(name);
 259        return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 260}
 261
 262char *get_index_file(void)
 263{
 264        if (!git_index_file)
 265                setup_git_env();
 266        return git_index_file;
 267}
 268
 269char *get_graft_file(void)
 270{
 271        if (!git_graft_file)
 272                setup_git_env();
 273        return git_graft_file;
 274}
 275
 276int set_git_dir(const char *path)
 277{
 278        if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 279                return error("Could not set GIT_DIR to '%s'", path);
 280        setup_git_env();
 281        return 0;
 282}
 283
 284const char *get_log_output_encoding(void)
 285{
 286        return git_log_output_encoding ? git_log_output_encoding
 287                : get_commit_output_encoding();
 288}
 289
 290const char *get_commit_output_encoding(void)
 291{
 292        return git_commit_encoding ? git_commit_encoding : "UTF-8";
 293}