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
  14int trust_executable_bit = 1;
  15int trust_ctime = 1;
  16int check_stat = 1;
  17int has_symlinks = 1;
  18int minimum_abbrev = 4, default_abbrev = 7;
  19int ignore_case;
  20int assume_unchanged;
  21int prefer_symlink_refs;
  22int is_bare_repository_cfg = -1; /* unspecified */
  23int log_all_ref_updates = -1; /* unspecified */
  24int warn_ambiguous_refs = 1;
  25int repository_format_version;
  26const char *git_commit_encoding;
  27const char *git_log_output_encoding;
  28int shared_repository = PERM_UMASK;
  29const char *apply_default_whitespace;
  30const char *apply_default_ignorewhitespace;
  31const char *git_attributes_file;
  32int zlib_compression_level = Z_BEST_SPEED;
  33int core_compression_level;
  34int core_compression_seen;
  35int fsync_object_files;
  36size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  37size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  38size_t delta_base_cache_limit = 16 * 1024 * 1024;
  39unsigned long big_file_threshold = 512 * 1024 * 1024;
  40const char *pager_program;
  41int pager_use_color = 1;
  42const char *editor_program;
  43const char *askpass_program;
  44const char *excludes_file;
  45enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
  46int read_replace_refs = 1; /* NEEDSWORK: rename to use_replace_refs */
  47enum eol core_eol = EOL_UNSET;
  48enum safe_crlf safe_crlf = SAFE_CRLF_WARN;
  49unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
  50enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  51enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  52enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
  53#ifndef OBJECT_CREATION_MODE
  54#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
  55#endif
  56enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
  57char *notes_ref_name;
  58int grafts_replace_parents = 1;
  59int core_apply_sparse_checkout;
  60int merge_log_config = -1;
  61int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
  62struct startup_info *startup_info;
  63unsigned long pack_size_limit_cfg;
  64
  65/*
  66 * The character that begins a commented line in user-editable file
  67 * that is subject to stripspace.
  68 */
  69char comment_line_char = '#';
  70
  71/* Parallel index stat data preload? */
  72int core_preload_index = 0;
  73
  74/* This is set by setup_git_dir_gently() and/or git_default_config() */
  75char *git_work_tree_cfg;
  76static char *work_tree;
  77
  78static const char *namespace;
  79static size_t namespace_len;
  80
  81static const char *git_dir;
  82static char *git_object_dir, *git_index_file, *git_graft_file;
  83
  84/*
  85 * Repository-local GIT_* environment variables; see cache.h for details.
  86 */
  87const char * const local_repo_env[] = {
  88        ALTERNATE_DB_ENVIRONMENT,
  89        CONFIG_ENVIRONMENT,
  90        CONFIG_DATA_ENVIRONMENT,
  91        DB_ENVIRONMENT,
  92        GIT_DIR_ENVIRONMENT,
  93        GIT_WORK_TREE_ENVIRONMENT,
  94        GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
  95        GRAFT_ENVIRONMENT,
  96        INDEX_ENVIRONMENT,
  97        NO_REPLACE_OBJECTS_ENVIRONMENT,
  98        GIT_PREFIX_ENVIRONMENT,
  99        NULL
 100};
 101
 102static char *expand_namespace(const char *raw_namespace)
 103{
 104        struct strbuf buf = STRBUF_INIT;
 105        struct strbuf **components, **c;
 106
 107        if (!raw_namespace || !*raw_namespace)
 108                return xstrdup("");
 109
 110        strbuf_addstr(&buf, raw_namespace);
 111        components = strbuf_split(&buf, '/');
 112        strbuf_reset(&buf);
 113        for (c = components; *c; c++)
 114                if (strcmp((*c)->buf, "/") != 0)
 115                        strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 116        strbuf_list_free(components);
 117        if (check_refname_format(buf.buf, 0))
 118                die("bad git namespace path \"%s\"", raw_namespace);
 119        strbuf_addch(&buf, '/');
 120        return strbuf_detach(&buf, NULL);
 121}
 122
 123static void setup_git_env(void)
 124{
 125        git_dir = getenv(GIT_DIR_ENVIRONMENT);
 126        git_dir = git_dir ? xstrdup(git_dir) : NULL;
 127        if (!git_dir) {
 128                git_dir = read_gitfile(DEFAULT_GIT_DIR_ENVIRONMENT);
 129                git_dir = git_dir ? xstrdup(git_dir) : NULL;
 130        }
 131        if (!git_dir)
 132                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
 133        git_object_dir = getenv(DB_ENVIRONMENT);
 134        if (!git_object_dir) {
 135                git_object_dir = xmalloc(strlen(git_dir) + 9);
 136                sprintf(git_object_dir, "%s/objects", git_dir);
 137        }
 138        git_index_file = getenv(INDEX_ENVIRONMENT);
 139        if (!git_index_file) {
 140                git_index_file = xmalloc(strlen(git_dir) + 7);
 141                sprintf(git_index_file, "%s/index", git_dir);
 142        }
 143        git_graft_file = getenv(GRAFT_ENVIRONMENT);
 144        if (!git_graft_file)
 145                git_graft_file = git_pathdup("info/grafts");
 146        if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
 147                read_replace_refs = 0;
 148        namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
 149        namespace_len = strlen(namespace);
 150}
 151
 152int is_bare_repository(void)
 153{
 154        /* if core.bare is not 'false', let's see if there is a work tree */
 155        return is_bare_repository_cfg && !get_git_work_tree();
 156}
 157
 158int have_git_dir(void)
 159{
 160        return !!git_dir;
 161}
 162
 163const char *get_git_dir(void)
 164{
 165        if (!git_dir)
 166                setup_git_env();
 167        return git_dir;
 168}
 169
 170const char *get_git_namespace(void)
 171{
 172        if (!namespace)
 173                setup_git_env();
 174        return namespace;
 175}
 176
 177const char *strip_namespace(const char *namespaced_ref)
 178{
 179        if (prefixcmp(namespaced_ref, get_git_namespace()) != 0)
 180                return NULL;
 181        return namespaced_ref + namespace_len;
 182}
 183
 184static int git_work_tree_initialized;
 185
 186/*
 187 * Note.  This works only before you used a work tree.  This was added
 188 * primarily to support git-clone to work in a new repository it just
 189 * created, and is not meant to flip between different work trees.
 190 */
 191void set_git_work_tree(const char *new_work_tree)
 192{
 193        if (git_work_tree_initialized) {
 194                new_work_tree = real_path(new_work_tree);
 195                if (strcmp(new_work_tree, work_tree))
 196                        die("internal error: work tree has already been set\n"
 197                            "Current worktree: %s\nNew worktree: %s",
 198                            work_tree, new_work_tree);
 199                return;
 200        }
 201        git_work_tree_initialized = 1;
 202        work_tree = xstrdup(real_path(new_work_tree));
 203}
 204
 205const char *get_git_work_tree(void)
 206{
 207        return work_tree;
 208}
 209
 210char *get_object_directory(void)
 211{
 212        if (!git_object_dir)
 213                setup_git_env();
 214        return git_object_dir;
 215}
 216
 217int odb_mkstemp(char *template, size_t limit, const char *pattern)
 218{
 219        int fd;
 220        /*
 221         * we let the umask do its job, don't try to be more
 222         * restrictive except to remove write permission.
 223         */
 224        int mode = 0444;
 225        snprintf(template, limit, "%s/%s",
 226                 get_object_directory(), pattern);
 227        fd = git_mkstemp_mode(template, mode);
 228        if (0 <= fd)
 229                return fd;
 230
 231        /* slow path */
 232        /* some mkstemp implementations erase template on failure */
 233        snprintf(template, limit, "%s/%s",
 234                 get_object_directory(), pattern);
 235        safe_create_leading_directories(template);
 236        return xmkstemp_mode(template, mode);
 237}
 238
 239int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1)
 240{
 241        int fd;
 242
 243        snprintf(name, namesz, "%s/pack/pack-%s.keep",
 244                 get_object_directory(), sha1_to_hex(sha1));
 245        fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 246        if (0 <= fd)
 247                return fd;
 248
 249        /* slow path */
 250        safe_create_leading_directories(name);
 251        return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 252}
 253
 254char *get_index_file(void)
 255{
 256        if (!git_index_file)
 257                setup_git_env();
 258        return git_index_file;
 259}
 260
 261char *get_graft_file(void)
 262{
 263        if (!git_graft_file)
 264                setup_git_env();
 265        return git_graft_file;
 266}
 267
 268int set_git_dir(const char *path)
 269{
 270        if (setenv(GIT_DIR_ENVIRONMENT, path, 1))
 271                return error("Could not set GIT_DIR to '%s'", path);
 272        setup_git_env();
 273        return 0;
 274}
 275
 276const char *get_log_output_encoding(void)
 277{
 278        return git_log_output_encoding ? git_log_output_encoding
 279                : get_commit_output_encoding();
 280}
 281
 282const char *get_commit_output_encoding(void)
 283{
 284        return git_commit_encoding ? git_commit_encoding : "UTF-8";
 285}