environment.c

   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
  11 #define USE_THE_REPOSITORY_VARIABLE
  12
  13 #include "git-compat-util.h"
  14 #include "abspath.h"
  15 #include "branch.h"
  16 #include "convert.h"
  17 #include "environment.h"
  18 #include "gettext.h"
  19 #include "repository.h"
  20 #include "config.h"
  21 #include "refs.h"
  22 #include "fmt-merge-msg.h"
  23 #include "commit.h"
  24 #include "strvec.h"
  25 #include "path.h"
  26 #include "chdir-notify.h"
  27 #include "setup.h"
  28 #include "write-or-die.h"
  29
  30 int trust_executable_bit = 1;
  31 int trust_ctime = 1;
  32 int check_stat = 1;
  33 int has_symlinks = 1;
  34 int minimum_abbrev = 4, default_abbrev = -1;
  35 int ignore_case;
  36 int assume_unchanged;
  37 int is_bare_repository_cfg = -1; /* unspecified */
  38 int warn_on_object_refname_ambiguity = 1;
  39 int repository_format_precious_objects;
  40 char *git_commit_encoding;
  41 char *git_log_output_encoding;
  42 char *apply_default_whitespace;
  43 char *apply_default_ignorewhitespace;
  44 char *git_attributes_file;
  45 char *git_hooks_path;
  46 int zlib_compression_level = Z_BEST_SPEED;
  47 int pack_compression_level = Z_DEFAULT_COMPRESSION;
  48 int fsync_object_files = -1;
  49 int use_fsync = -1;
  50 enum fsync_method fsync_method = FSYNC_METHOD_DEFAULT;
  51 enum fsync_component fsync_components = FSYNC_COMPONENTS_DEFAULT;
  52 size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
  53 size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
  54 size_t delta_base_cache_limit = 96 * 1024 * 1024;
  55 unsigned long big_file_threshold = 512 * 1024 * 1024;
  56 char *editor_program;
  57 char *askpass_program;
  58 char *excludes_file;
  59 enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
  60 enum eol core_eol = EOL_UNSET;
  61 int global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
  62 char *check_roundtrip_encoding;
  63 enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
  64 enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
  65 enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
  66 #ifndef OBJECT_CREATION_MODE
  67 #define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
  68 #endif
  69 enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
  70 int grafts_keep_true_parents;
  71 int core_apply_sparse_checkout;
  72 int core_sparse_checkout_cone;
  73 int sparse_expect_files_outside_of_patterns;
  74 int merge_log_config = -1;
  75 int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
  76 unsigned long pack_size_limit_cfg;
  77 int max_allowed_tree_depth =
  78 #ifdef _MSC_VER
  79         /*
  80          * When traversing into too-deep trees, Visual C-compiled Git seems to
  81          * run into some internal stack overflow detection in the
  82          * `RtlpAllocateHeap()` function that is called from within
  83          * `git_inflate_init()`'s call tree. The following value seems to be
  84          * low enough to avoid that by letting Git exit with an error before
  85          * the stack overflow can occur.
  86          */
  87         512;
  88 #else
  89         2048;
  90 #endif
  91
  92 #ifndef PROTECT_HFS_DEFAULT
  93 #define PROTECT_HFS_DEFAULT 0
  94 #endif
  95 int protect_hfs = PROTECT_HFS_DEFAULT;
  96
  97 #ifndef PROTECT_NTFS_DEFAULT
  98 #define PROTECT_NTFS_DEFAULT 1
  99 #endif
 100 int protect_ntfs = PROTECT_NTFS_DEFAULT;
 101
 102 /*
 103  * The character that begins a commented line in user-editable file
 104  * that is subject to stripspace.
 105  */
 106 const char *comment_line_str = "#";
 107 char *comment_line_str_to_free;
 108 int auto_comment_line_char;
 109
 110 /* Parallel index stat data preload? */
 111 int core_preload_index = 1;
 112
 113 /* This is set by setup_git_dir_gently() and/or git_default_config() */
 114 char *git_work_tree_cfg;
 115
 116 /*
 117  * Repository-local GIT_* environment variables; see environment.h for details.
 118  */
 119 const char * const local_repo_env[] = {
 120         ALTERNATE_DB_ENVIRONMENT,
 121         CONFIG_ENVIRONMENT,
 122         CONFIG_DATA_ENVIRONMENT,
 123         CONFIG_COUNT_ENVIRONMENT,
 124         DB_ENVIRONMENT,
 125         GIT_DIR_ENVIRONMENT,
 126         GIT_WORK_TREE_ENVIRONMENT,
 127         GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
 128         GRAFT_ENVIRONMENT,
 129         INDEX_ENVIRONMENT,
 130         NO_REPLACE_OBJECTS_ENVIRONMENT,
 131         GIT_REPLACE_REF_BASE_ENVIRONMENT,
 132         GIT_PREFIX_ENVIRONMENT,
 133         GIT_SHALLOW_FILE_ENVIRONMENT,
 134         GIT_COMMON_DIR_ENVIRONMENT,
 135         NULL
 136 };
 137
 138 const char *getenv_safe(struct strvec *argv, const char *name)
 139 {
 140         const char *value = getenv(name);
 141
 142         if (!value)
 143                 return NULL;
 144
 145         strvec_push(argv, value);
 146         return argv->v[argv->nr - 1];
 147 }
 148
 149 int is_bare_repository(void)
 150 {
 151         /* if core.bare is not 'false', let's see if there is a work tree */
 152         return is_bare_repository_cfg && !repo_get_work_tree(the_repository);
 153 }
 154
 155 int have_git_dir(void)
 156 {
 157         return startup_info->have_repository
 158                 || the_repository->gitdir;
 159 }
 160
 161 const char *get_git_namespace(void)
 162 {
 163         static const char *namespace;
 164
 165         struct strbuf buf = STRBUF_INIT;
 166         struct strbuf **components, **c;
 167         const char *raw_namespace;
 168
 169         if (namespace)
 170                 return namespace;
 171
 172         raw_namespace = getenv(GIT_NAMESPACE_ENVIRONMENT);
 173         if (!raw_namespace || !*raw_namespace) {
 174                 namespace = "";
 175                 return namespace;
 176         }
 177
 178         strbuf_addstr(&buf, raw_namespace);
 179         components = strbuf_split(&buf, '/');
 180         strbuf_reset(&buf);
 181         for (c = components; *c; c++)
 182                 if (strcmp((*c)->buf, "/") != 0)
 183                         strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
 184         strbuf_list_free(components);
 185         if (check_refname_format(buf.buf, 0))
 186                 die(_("bad git namespace path \"%s\""), raw_namespace);
 187         strbuf_addch(&buf, '/');
 188
 189         namespace = strbuf_detach(&buf, NULL);
 190
 191         return namespace;
 192 }
 193
 194 const char *strip_namespace(const char *namespaced_ref)
 195 {
 196         const char *out;
 197         if (skip_prefix(namespaced_ref, get_git_namespace(), &out))
 198                 return out;
 199         return NULL;
 200 }
 201
 202 const char *get_log_output_encoding(void)
 203 {
 204         return git_log_output_encoding ? git_log_output_encoding
 205                 : get_commit_output_encoding();
 206 }
 207
 208 const char *get_commit_output_encoding(void)
 209 {
 210         return git_commit_encoding ? git_commit_encoding : "UTF-8";
 211 }
 212
 213 static int the_shared_repository = PERM_UMASK;
 214 static int need_shared_repository_from_config = 1;
 215
 216 void set_shared_repository(int value)
 217 {
 218         the_shared_repository = value;
 219         need_shared_repository_from_config = 0;
 220 }
 221
 222 int get_shared_repository(void)
 223 {
 224         if (need_shared_repository_from_config) {
 225                 const char *var = "core.sharedrepository";
 226                 const char *value;
 227                 if (!git_config_get_value(var, &value))
 228                         the_shared_repository = git_config_perm(var, value);
 229                 need_shared_repository_from_config = 0;
 230         }
 231         return the_shared_repository;
 232 }
 233
 234 void reset_shared_repository(void)
 235 {
 236         need_shared_repository_from_config = 1;
 237 }
 238
 239 int use_optional_locks(void)
 240 {
 241         return git_env_bool(GIT_OPTIONAL_LOCKS_ENVIRONMENT, 1);
 242 }
 243
 244 int print_sha1_ellipsis(void)
 245 {
 246         /*
 247          * Determine if the calling environment contains the variable
 248          * GIT_PRINT_SHA1_ELLIPSIS set to "yes".
 249          */
 250         static int cached_result = -1; /* unknown */
 251
 252         if (cached_result < 0) {
 253                 const char *v = getenv("GIT_PRINT_SHA1_ELLIPSIS");
 254                 cached_result = (v && !strcasecmp(v, "yes"));
 255         }
 256         return cached_result;
 257 }