| 1 | #define USE_THE_REPOSITORY_VARIABLE |
| 2 | |
| 3 | #include "git-compat-util.h" |
| 4 | #include "common-init.h" |
| 5 | #include "exec-cmd.h" |
| 6 | #include "gettext.h" |
| 7 | #include "attr.h" |
| 8 | #include "odb.h" |
| 9 | #include "parse.h" |
| 10 | #include "repository.h" |
| 11 | #include "replace-object.h" |
| 12 | #include "setup.h" |
| 13 | #include "strbuf.h" |
| 14 | #include "trace2.h" |
| 15 | |
| 16 | /* |
| 17 | * Many parts of Git have subprograms communicate via pipe, expect the |
| 18 | * upstream of a pipe to die with SIGPIPE when the downstream of a |
| 19 | * pipe does not need to read all that is written. Some third-party |
| 20 | * programs that ignore or block SIGPIPE for their own reason forget |
| 21 | * to restore SIGPIPE handling to the default before spawning Git and |
| 22 | * break this carefully orchestrated machinery. |
| 23 | * |
| 24 | * Restore the way SIGPIPE is handled to default, which is what we |
| 25 | * expect. |
| 26 | */ |
| 27 | static void restore_sigpipe_to_default(void) |
| 28 | { |
| 29 | sigset_t unblock; |
| 30 | |
| 31 | sigemptyset(&unblock); |
| 32 | sigaddset(&unblock, SIGPIPE); |
| 33 | sigprocmask(SIG_UNBLOCK, &unblock, NULL); |
| 34 | signal(SIGPIPE, SIG_DFL); |
| 35 | } |
| 36 | |
| 37 | static void setup_environment(void) |
| 38 | { |
| 39 | char *git_replace_ref_base; |
| 40 | const char *replace_ref_base; |
| 41 | |
| 42 | if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT)) |
| 43 | disable_replace_refs(); |
| 44 | replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT); |
| 45 | git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base |
| 46 | : "refs/replace/"); |
| 47 | update_ref_namespace(NAMESPACE_REPLACE, git_replace_ref_base); |
| 48 | |
| 49 | if (git_env_bool(NO_LAZY_FETCH_ENVIRONMENT, 0)) |
| 50 | fetch_if_missing = 0; |
| 51 | } |
| 52 | |
| 53 | void init_git(const char **argv) |
| 54 | { |
| 55 | struct strbuf tmp = STRBUF_INIT; |
| 56 | |
| 57 | trace2_initialize_clock(); |
| 58 | |
| 59 | /* |
| 60 | * Always open file descriptors 0/1/2 to avoid clobbering files |
| 61 | * in die(). It also avoids messing up when the pipes are dup'ed |
| 62 | * onto stdin/stdout/stderr in the child processes we spawn. |
| 63 | */ |
| 64 | sanitize_stdfds(); |
| 65 | restore_sigpipe_to_default(); |
| 66 | |
| 67 | git_resolve_executable_dir(argv[0]); |
| 68 | |
| 69 | setlocale(LC_CTYPE, ""); |
| 70 | git_setup_gettext(); |
| 71 | |
| 72 | initialize_repository(the_repository); |
| 73 | setup_environment(); |
| 74 | |
| 75 | attr_start(); |
| 76 | |
| 77 | trace2_initialize(); |
| 78 | trace2_cmd_start(argv); |
| 79 | trace2_collect_process_info(TRACE2_PROCESS_INFO_STARTUP); |
| 80 | |
| 81 | if (!strbuf_getcwd(&tmp)) |
| 82 | tmp_original_cwd = strbuf_detach(&tmp, NULL); |
| 83 | } |