git/environment.c
Junio C Hamano 67c305f722 Merge branch 'ds/midx-normalize-pathname-before-comparison' into maint
The path taken by "git multi-pack-index" command from the end user
was compared with path internally prepared by the tool withut first
normalizing, which lead to duplicated paths not being noticed,
which has been corrected.
source: <pull.1221.v2.git.1650911234.gitgitgadget@gmail.com>

* ds/midx-normalize-pathname-before-comparison:
  cache: use const char * for get_object_directory()
  multi-pack-index: use --object-dir real path
  midx: use real paths in lookup_multi_pack_index()
2022-06-08 14:27:53 -07:00

425 lines
11 KiB
C

/*
* We put all the git config variables in this same object
* file, so that programs can link against the config parser
* without having to link against all the rest of git.
*
* In particular, no need to bring in libz etc unless needed,
* even if you might want to know where the git directory etc
* are.
*/
#include "cache.h"
#include "branch.h"
#include "environment.h"
#include "repository.h"
#include "config.h"
#include "refs.h"
#include "fmt-merge-msg.h"
#include "commit.h"
#include "strvec.h"
#include "object-store.h"
#include "tmp-objdir.h"
#include "chdir-notify.h"
#include "shallow.h"
int trust_executable_bit = 1;
int trust_ctime = 1;
int check_stat = 1;
int has_symlinks = 1;
int minimum_abbrev = 4, default_abbrev = -1;
int ignore_case;
int assume_unchanged;
int prefer_symlink_refs;
int is_bare_repository_cfg = -1; /* unspecified */
int warn_ambiguous_refs = 1;
int warn_on_object_refname_ambiguity = 1;
int repository_format_precious_objects;
int repository_format_worktree_config;
const char *git_commit_encoding;
const char *git_log_output_encoding;
char *apply_default_whitespace;
char *apply_default_ignorewhitespace;
const char *git_attributes_file;
const char *git_hooks_path;
int zlib_compression_level = Z_BEST_SPEED;
int pack_compression_level = Z_DEFAULT_COMPRESSION;
int fsync_object_files = -1;
int use_fsync = -1;
enum fsync_method fsync_method = FSYNC_METHOD_DEFAULT;
enum fsync_component fsync_components = FSYNC_COMPONENTS_DEFAULT;
size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
size_t delta_base_cache_limit = 96 * 1024 * 1024;
unsigned long big_file_threshold = 512 * 1024 * 1024;
int pager_use_color = 1;
const char *editor_program;
const char *askpass_program;
const char *excludes_file;
enum auto_crlf auto_crlf = AUTO_CRLF_FALSE;
int read_replace_refs = 1;
char *git_replace_ref_base;
enum eol core_eol = EOL_UNSET;
int global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
char *check_roundtrip_encoding = "SHIFT-JIS";
unsigned whitespace_rule_cfg = WS_DEFAULT_RULE;
enum branch_track git_branch_track = BRANCH_TRACK_REMOTE;
enum rebase_setup_type autorebase = AUTOREBASE_NEVER;
enum push_default_type push_default = PUSH_DEFAULT_UNSPECIFIED;
#ifndef OBJECT_CREATION_MODE
#define OBJECT_CREATION_MODE OBJECT_CREATION_USES_HARDLINKS
#endif
enum object_creation_mode object_creation_mode = OBJECT_CREATION_MODE;
char *notes_ref_name;
int grafts_replace_parents = 1;
int core_apply_sparse_checkout;
int core_sparse_checkout_cone;
int sparse_expect_files_outside_of_patterns;
int merge_log_config = -1;
int precomposed_unicode = -1; /* see probe_utf8_pathname_composition() */
unsigned long pack_size_limit_cfg;
enum log_refs_config log_all_ref_updates = LOG_REFS_UNSET;
#ifndef PROTECT_HFS_DEFAULT
#define PROTECT_HFS_DEFAULT 0
#endif
int protect_hfs = PROTECT_HFS_DEFAULT;
#ifndef PROTECT_NTFS_DEFAULT
#define PROTECT_NTFS_DEFAULT 1
#endif
int protect_ntfs = PROTECT_NTFS_DEFAULT;
/*
* The character that begins a commented line in user-editable file
* that is subject to stripspace.
*/
char comment_line_char = '#';
int auto_comment_line_char;
/* Parallel index stat data preload? */
int core_preload_index = 1;
/* This is set by setup_git_dir_gently() and/or git_default_config() */
char *git_work_tree_cfg;
static char *git_namespace;
static char *super_prefix;
/*
* Repository-local GIT_* environment variables; see cache.h for details.
*/
const char * const local_repo_env[] = {
ALTERNATE_DB_ENVIRONMENT,
CONFIG_ENVIRONMENT,
CONFIG_DATA_ENVIRONMENT,
CONFIG_COUNT_ENVIRONMENT,
DB_ENVIRONMENT,
GIT_DIR_ENVIRONMENT,
GIT_WORK_TREE_ENVIRONMENT,
GIT_IMPLICIT_WORK_TREE_ENVIRONMENT,
GRAFT_ENVIRONMENT,
INDEX_ENVIRONMENT,
NO_REPLACE_OBJECTS_ENVIRONMENT,
GIT_REPLACE_REF_BASE_ENVIRONMENT,
GIT_PREFIX_ENVIRONMENT,
GIT_SUPER_PREFIX_ENVIRONMENT,
GIT_SHALLOW_FILE_ENVIRONMENT,
GIT_COMMON_DIR_ENVIRONMENT,
NULL
};
static char *expand_namespace(const char *raw_namespace)
{
struct strbuf buf = STRBUF_INIT;
struct strbuf **components, **c;
if (!raw_namespace || !*raw_namespace)
return xstrdup("");
strbuf_addstr(&buf, raw_namespace);
components = strbuf_split(&buf, '/');
strbuf_reset(&buf);
for (c = components; *c; c++)
if (strcmp((*c)->buf, "/") != 0)
strbuf_addf(&buf, "refs/namespaces/%s", (*c)->buf);
strbuf_list_free(components);
if (check_refname_format(buf.buf, 0))
die(_("bad git namespace path \"%s\""), raw_namespace);
strbuf_addch(&buf, '/');
return strbuf_detach(&buf, NULL);
}
const char *getenv_safe(struct strvec *argv, const char *name)
{
const char *value = getenv(name);
if (!value)
return NULL;
strvec_push(argv, value);
return argv->v[argv->nr - 1];
}
void setup_git_env(const char *git_dir)
{
const char *shallow_file;
const char *replace_ref_base;
struct set_gitdir_args args = { NULL };
struct strvec to_free = STRVEC_INIT;
args.commondir = getenv_safe(&to_free, GIT_COMMON_DIR_ENVIRONMENT);
args.object_dir = getenv_safe(&to_free, DB_ENVIRONMENT);
args.graft_file = getenv_safe(&to_free, GRAFT_ENVIRONMENT);
args.index_file = getenv_safe(&to_free, INDEX_ENVIRONMENT);
args.alternate_db = getenv_safe(&to_free, ALTERNATE_DB_ENVIRONMENT);
if (getenv(GIT_QUARANTINE_ENVIRONMENT)) {
args.disable_ref_updates = 1;
}
repo_set_gitdir(the_repository, git_dir, &args);
strvec_clear(&to_free);
if (getenv(NO_REPLACE_OBJECTS_ENVIRONMENT))
read_replace_refs = 0;
replace_ref_base = getenv(GIT_REPLACE_REF_BASE_ENVIRONMENT);
free(git_replace_ref_base);
git_replace_ref_base = xstrdup(replace_ref_base ? replace_ref_base
: "refs/replace/");
free(git_namespace);
git_namespace = expand_namespace(getenv(GIT_NAMESPACE_ENVIRONMENT));
shallow_file = getenv(GIT_SHALLOW_FILE_ENVIRONMENT);
if (shallow_file)
set_alternate_shallow_file(the_repository, shallow_file, 0);
}
int is_bare_repository(void)
{
/* if core.bare is not 'false', let's see if there is a work tree */
return is_bare_repository_cfg && !get_git_work_tree();
}
int have_git_dir(void)
{
return startup_info->have_repository
|| the_repository->gitdir;
}
const char *get_git_dir(void)
{
if (!the_repository->gitdir)
BUG("git environment hasn't been setup");
return the_repository->gitdir;
}
const char *get_git_common_dir(void)
{
if (!the_repository->commondir)
BUG("git environment hasn't been setup");
return the_repository->commondir;
}
const char *get_git_namespace(void)
{
if (!git_namespace)
BUG("git environment hasn't been setup");
return git_namespace;
}
const char *strip_namespace(const char *namespaced_ref)
{
const char *out;
if (skip_prefix(namespaced_ref, get_git_namespace(), &out))
return out;
return NULL;
}
const char *get_super_prefix(void)
{
static int initialized;
if (!initialized) {
super_prefix = xstrdup_or_null(getenv(GIT_SUPER_PREFIX_ENVIRONMENT));
initialized = 1;
}
return super_prefix;
}
static int git_work_tree_initialized;
/*
* Note. This works only before you used a work tree. This was added
* primarily to support git-clone to work in a new repository it just
* created, and is not meant to flip between different work trees.
*/
void set_git_work_tree(const char *new_work_tree)
{
if (git_work_tree_initialized) {
struct strbuf realpath = STRBUF_INIT;
strbuf_realpath(&realpath, new_work_tree, 1);
new_work_tree = realpath.buf;
if (strcmp(new_work_tree, the_repository->worktree))
die("internal error: work tree has already been set\n"
"Current worktree: %s\nNew worktree: %s",
the_repository->worktree, new_work_tree);
strbuf_release(&realpath);
return;
}
git_work_tree_initialized = 1;
repo_set_worktree(the_repository, new_work_tree);
}
const char *get_git_work_tree(void)
{
return the_repository->worktree;
}
const char *get_object_directory(void)
{
if (!the_repository->objects->odb)
BUG("git environment hasn't been setup");
return the_repository->objects->odb->path;
}
int odb_mkstemp(struct strbuf *temp_filename, const char *pattern)
{
int fd;
/*
* we let the umask do its job, don't try to be more
* restrictive except to remove write permission.
*/
int mode = 0444;
git_path_buf(temp_filename, "objects/%s", pattern);
fd = git_mkstemp_mode(temp_filename->buf, mode);
if (0 <= fd)
return fd;
/* slow path */
/* some mkstemp implementations erase temp_filename on failure */
git_path_buf(temp_filename, "objects/%s", pattern);
safe_create_leading_directories(temp_filename->buf);
return xmkstemp_mode(temp_filename->buf, mode);
}
int odb_pack_keep(const char *name)
{
int fd;
fd = open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
if (0 <= fd)
return fd;
/* slow path */
safe_create_leading_directories_const(name);
return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
}
char *get_index_file(void)
{
if (!the_repository->index_file)
BUG("git environment hasn't been setup");
return the_repository->index_file;
}
char *get_graft_file(struct repository *r)
{
if (!r->graft_file)
BUG("git environment hasn't been setup");
return r->graft_file;
}
static void set_git_dir_1(const char *path)
{
xsetenv(GIT_DIR_ENVIRONMENT, path, 1);
setup_git_env(path);
}
static void update_relative_gitdir(const char *name,
const char *old_cwd,
const char *new_cwd,
void *data)
{
char *path = reparent_relative_path(old_cwd, new_cwd, get_git_dir());
struct tmp_objdir *tmp_objdir = tmp_objdir_unapply_primary_odb();
trace_printf_key(&trace_setup_key,
"setup: move $GIT_DIR to '%s'",
path);
set_git_dir_1(path);
if (tmp_objdir)
tmp_objdir_reapply_primary_odb(tmp_objdir, old_cwd, new_cwd);
free(path);
}
void set_git_dir(const char *path, int make_realpath)
{
struct strbuf realpath = STRBUF_INIT;
if (make_realpath) {
strbuf_realpath(&realpath, path, 1);
path = realpath.buf;
}
set_git_dir_1(path);
if (!is_absolute_path(path))
chdir_notify_register(NULL, update_relative_gitdir, NULL);
strbuf_release(&realpath);
}
const char *get_log_output_encoding(void)
{
return git_log_output_encoding ? git_log_output_encoding
: get_commit_output_encoding();
}
const char *get_commit_output_encoding(void)
{
return git_commit_encoding ? git_commit_encoding : "UTF-8";
}
static int the_shared_repository = PERM_UMASK;
static int need_shared_repository_from_config = 1;
void set_shared_repository(int value)
{
the_shared_repository = value;
need_shared_repository_from_config = 0;
}
int get_shared_repository(void)
{
if (need_shared_repository_from_config) {
const char *var = "core.sharedrepository";
const char *value;
if (!git_config_get_value(var, &value))
the_shared_repository = git_config_perm(var, value);
need_shared_repository_from_config = 0;
}
return the_shared_repository;
}
void reset_shared_repository(void)
{
need_shared_repository_from_config = 1;
}
int use_optional_locks(void)
{
return git_env_bool(GIT_OPTIONAL_LOCKS_ENVIRONMENT, 1);
}
int print_sha1_ellipsis(void)
{
/*
* Determine if the calling environment contains the variable
* GIT_PRINT_SHA1_ELLIPSIS set to "yes".
*/
static int cached_result = -1; /* unknown */
if (cached_result < 0) {
const char *v = getenv("GIT_PRINT_SHA1_ELLIPSIS");
cached_result = (v && !strcasecmp(v, "yes"));
}
return cached_result;
}