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git/config.c
Junio C Hamano e706aaf3bc Merge branch 'ps/config-global-override' 
Replace GIT_CONFIG_NOSYSTEM mechanism to decline from reading the
system-wide configuration file with GIT_CONFIG_SYSTEM that lets
users specify from which file to read the system-wide configuration
(setting it to an empty file would essentially be the same as
setting NOSYSTEM), and introduce GIT_CONFIG_GLOBAL to override the
per-user configuration in $HOME/.gitconfig.

* ps/config-global-override:
  t1300: fix unset of GIT_CONFIG_NOSYSTEM leaking into subsequent tests
  config: allow overriding of global and system configuration
  config: unify code paths to get global config paths
  config: rename `git_etc_config()`
2021-05-07 12:47:39 +09:00

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/*
* GIT - The information manager from hell
*
* Copyright (C) Linus Torvalds, 2005
* Copyright (C) Johannes Schindelin, 2005
*
*/
#include "cache.h"
#include "branch.h"
#include "config.h"
#include "environment.h"
#include "repository.h"
#include "lockfile.h"
#include "exec-cmd.h"
#include "strbuf.h"
#include "quote.h"
#include "hashmap.h"
#include "string-list.h"
#include "object-store.h"
#include "utf8.h"
#include "dir.h"
#include "color.h"
#include "refs.h"
struct config_source {
struct config_source *prev;
union {
FILE *file;
struct config_buf {
const char *buf;
size_t len;
size_t pos;
} buf;
} u;
enum config_origin_type origin_type;
const char *name;
const char *path;
enum config_error_action default_error_action;
int linenr;
int eof;
size_t total_len;
struct strbuf value;
struct strbuf var;
unsigned subsection_case_sensitive : 1;
int (*do_fgetc)(struct config_source *c);
int (*do_ungetc)(int c, struct config_source *conf);
long (*do_ftell)(struct config_source *c);
};
/*
* These variables record the "current" config source, which
* can be accessed by parsing callbacks.
*
* The "cf" variable will be non-NULL only when we are actually parsing a real
* config source (file, blob, cmdline, etc).
*
* The "current_config_kvi" variable will be non-NULL only when we are feeding
* cached config from a configset into a callback.
*
* They should generally never be non-NULL at the same time. If they are both
* NULL, then we aren't parsing anything (and depending on the function looking
* at the variables, it's either a bug for it to be called in the first place,
* or it's a function which can be reused for non-config purposes, and should
* fall back to some sane behavior).
*/
static struct config_source *cf;
static struct key_value_info *current_config_kvi;
/*
* Similar to the variables above, this gives access to the "scope" of the
* current value (repo, global, etc). For cached values, it can be found via
* the current_config_kvi as above. During parsing, the current value can be
* found in this variable. It's not part of "cf" because it transcends a single
* file (i.e., a file included from .git/config is still in "repo" scope).
*/
static enum config_scope current_parsing_scope;
static int core_compression_seen;
static int pack_compression_seen;
static int zlib_compression_seen;
static int config_file_fgetc(struct config_source *conf)
{
return getc_unlocked(conf->u.file);
}
static int config_file_ungetc(int c, struct config_source *conf)
{
return ungetc(c, conf->u.file);
}
static long config_file_ftell(struct config_source *conf)
{
return ftell(conf->u.file);
}
static int config_buf_fgetc(struct config_source *conf)
{
if (conf->u.buf.pos < conf->u.buf.len)
return conf->u.buf.buf[conf->u.buf.pos++];
return EOF;
}
static int config_buf_ungetc(int c, struct config_source *conf)
{
if (conf->u.buf.pos > 0) {
conf->u.buf.pos--;
if (conf->u.buf.buf[conf->u.buf.pos] != c)
BUG("config_buf can only ungetc the same character");
return c;
}
return EOF;
}
static long config_buf_ftell(struct config_source *conf)
{
return conf->u.buf.pos;
}
#define MAX_INCLUDE_DEPTH 10
static const char include_depth_advice[] = N_(
"exceeded maximum include depth (%d) while including\n"
" %s\n"
"from\n"
" %s\n"
"This might be due to circular includes.");
static int handle_path_include(const char *path, struct config_include_data *inc)
{
int ret = 0;
struct strbuf buf = STRBUF_INIT;
char *expanded;
if (!path)
return config_error_nonbool("include.path");
expanded = expand_user_path(path, 0);
if (!expanded)
return error(_("could not expand include path '%s'"), path);
path = expanded;
/*
* Use an absolute path as-is, but interpret relative paths
* based on the including config file.
*/
if (!is_absolute_path(path)) {
char *slash;
if (!cf || !cf->path)
return error(_("relative config includes must come from files"));
slash = find_last_dir_sep(cf->path);
if (slash)
strbuf_add(&buf, cf->path, slash - cf->path + 1);
strbuf_addstr(&buf, path);
path = buf.buf;
}
if (!access_or_die(path, R_OK, 0)) {
if (++inc->depth > MAX_INCLUDE_DEPTH)
die(_(include_depth_advice), MAX_INCLUDE_DEPTH, path,
!cf ? "<unknown>" :
cf->name ? cf->name :
"the command line");
ret = git_config_from_file(git_config_include, path, inc);
inc->depth--;
}
strbuf_release(&buf);
free(expanded);
return ret;
}
static void add_trailing_starstar_for_dir(struct strbuf *pat)
{
if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
strbuf_addstr(pat, "**");
}
static int prepare_include_condition_pattern(struct strbuf *pat)
{
struct strbuf path = STRBUF_INIT;
char *expanded;
int prefix = 0;
expanded = expand_user_path(pat->buf, 1);
if (expanded) {
strbuf_reset(pat);
strbuf_addstr(pat, expanded);
free(expanded);
}
if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
const char *slash;
if (!cf || !cf->path)
return error(_("relative config include "
"conditionals must come from files"));
strbuf_realpath(&path, cf->path, 1);
slash = find_last_dir_sep(path.buf);
if (!slash)
BUG("how is this possible?");
strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
prefix = slash - path.buf + 1 /* slash */;
} else if (!is_absolute_path(pat->buf))
strbuf_insertstr(pat, 0, "**/");
add_trailing_starstar_for_dir(pat);
strbuf_release(&path);
return prefix;
}
static int include_by_gitdir(const struct config_options *opts,
const char *cond, size_t cond_len, int icase)
{
struct strbuf text = STRBUF_INIT;
struct strbuf pattern = STRBUF_INIT;
int ret = 0, prefix;
const char *git_dir;
int already_tried_absolute = 0;
if (opts->git_dir)
git_dir = opts->git_dir;
else
goto done;
strbuf_realpath(&text, git_dir, 1);
strbuf_add(&pattern, cond, cond_len);
prefix = prepare_include_condition_pattern(&pattern);
again:
if (prefix < 0)
goto done;
if (prefix > 0) {
/*
* perform literal matching on the prefix part so that
* any wildcard character in it can't create side effects.
*/
if (text.len < prefix)
goto done;
if (!icase && strncmp(pattern.buf, text.buf, prefix))
goto done;
if (icase && strncasecmp(pattern.buf, text.buf, prefix))
goto done;
}
ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
WM_PATHNAME | (icase ? WM_CASEFOLD : 0));
if (!ret && !already_tried_absolute) {
/*
* We've tried e.g. matching gitdir:~/work, but if
* ~/work is a symlink to /mnt/storage/work
* strbuf_realpath() will expand it, so the rule won't
* match. Let's match against a
* strbuf_add_absolute_path() version of the path,
* which'll do the right thing
*/
strbuf_reset(&text);
strbuf_add_absolute_path(&text, git_dir);
already_tried_absolute = 1;
goto again;
}
done:
strbuf_release(&pattern);
strbuf_release(&text);
return ret;
}
static int include_by_branch(const char *cond, size_t cond_len)
{
int flags;
int ret;
struct strbuf pattern = STRBUF_INIT;
const char *refname = !the_repository->gitdir ?
NULL : resolve_ref_unsafe("HEAD", 0, NULL, &flags);
const char *shortname;
if (!refname || !(flags & REF_ISSYMREF) ||
!skip_prefix(refname, "refs/heads/", &shortname))
return 0;
strbuf_add(&pattern, cond, cond_len);
add_trailing_starstar_for_dir(&pattern);
ret = !wildmatch(pattern.buf, shortname, WM_PATHNAME);
strbuf_release(&pattern);
return ret;
}
static int include_condition_is_true(const struct config_options *opts,
const char *cond, size_t cond_len)
{
if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
return include_by_gitdir(opts, cond, cond_len, 0);
else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
return include_by_gitdir(opts, cond, cond_len, 1);
else if (skip_prefix_mem(cond, cond_len, "onbranch:", &cond, &cond_len))
return include_by_branch(cond, cond_len);
/* unknown conditionals are always false */
return 0;
}
int git_config_include(const char *var, const char *value, void *data)
{
struct config_include_data *inc = data;
const char *cond, *key;
size_t cond_len;
int ret;
/*
* Pass along all values, including "include" directives; this makes it
* possible to query information on the includes themselves.
*/
ret = inc->fn(var, value, inc->data);
if (ret < 0)
return ret;
if (!strcmp(var, "include.path"))
ret = handle_path_include(value, inc);
if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
(cond && include_condition_is_true(inc->opts, cond, cond_len)) &&
!strcmp(key, "path"))
ret = handle_path_include(value, inc);
return ret;
}
static void git_config_push_split_parameter(const char *key, const char *value)
{
struct strbuf env = STRBUF_INIT;
const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
if (old && *old) {
strbuf_addstr(&env, old);
strbuf_addch(&env, ' ');
}
sq_quote_buf(&env, key);
strbuf_addch(&env, '=');
if (value)
sq_quote_buf(&env, value);
setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
strbuf_release(&env);
}
void git_config_push_parameter(const char *text)
{
const char *value;
/*
* When we see:
*
* section.subsection=with=equals.key=value
*
* we cannot tell if it means:
*
* [section "subsection=with=equals"]
* key = value
*
* or:
*
* [section]
* subsection = with=equals.key=value
*
* We parse left-to-right for the first "=", meaning we'll prefer to
* keep the value intact over the subsection. This is historical, but
* also sensible since values are more likely to contain odd or
* untrusted input than a section name.
*
* A missing equals is explicitly allowed (as a bool-only entry).
*/
value = strchr(text, '=');
if (value) {
char *key = xmemdupz(text, value - text);
git_config_push_split_parameter(key, value + 1);
free(key);
} else {
git_config_push_split_parameter(text, NULL);
}
}
void git_config_push_env(const char *spec)
{
char *key;
const char *env_name;
const char *env_value;
env_name = strrchr(spec, '=');
if (!env_name)
die(_("invalid config format: %s"), spec);
key = xmemdupz(spec, env_name - spec);
env_name++;
if (!*env_name)
die(_("missing environment variable name for configuration '%.*s'"),
(int)(env_name - spec - 1), spec);
env_value = getenv(env_name);
if (!env_value)
die(_("missing environment variable '%s' for configuration '%.*s'"),
env_name, (int)(env_name - spec - 1), spec);
git_config_push_split_parameter(key, env_value);
free(key);
}
static inline int iskeychar(int c)
{
return isalnum(c) || c == '-';
}
/*
* Auxiliary function to sanity-check and split the key into the section
* identifier and variable name.
*
* Returns 0 on success, -1 when there is an invalid character in the key and
* -2 if there is no section name in the key.
*
* store_key - pointer to char* which will hold a copy of the key with
* lowercase section and variable name
* baselen - pointer to size_t which will hold the length of the
* section + subsection part, can be NULL
*/
static int git_config_parse_key_1(const char *key, char **store_key, size_t *baselen_, int quiet)
{
size_t i, baselen;
int dot;
const char *last_dot = strrchr(key, '.');
/*
* Since "key" actually contains the section name and the real
* key name separated by a dot, we have to know where the dot is.
*/
if (last_dot == NULL || last_dot == key) {
if (!quiet)
error(_("key does not contain a section: %s"), key);
return -CONFIG_NO_SECTION_OR_NAME;
}
if (!last_dot[1]) {
if (!quiet)
error(_("key does not contain variable name: %s"), key);
return -CONFIG_NO_SECTION_OR_NAME;
}
baselen = last_dot - key;
if (baselen_)
*baselen_ = baselen;
/*
* Validate the key and while at it, lower case it for matching.
*/
if (store_key)
*store_key = xmallocz(strlen(key));
dot = 0;
for (i = 0; key[i]; i++) {
unsigned char c = key[i];
if (c == '.')
dot = 1;
/* Leave the extended basename untouched.. */
if (!dot || i > baselen) {
if (!iskeychar(c) ||
(i == baselen + 1 && !isalpha(c))) {
if (!quiet)
error(_("invalid key: %s"), key);
goto out_free_ret_1;
}
c = tolower(c);
} else if (c == '\n') {
if (!quiet)
error(_("invalid key (newline): %s"), key);
goto out_free_ret_1;
}
if (store_key)
(*store_key)[i] = c;
}
return 0;
out_free_ret_1:
if (store_key) {
FREE_AND_NULL(*store_key);
}
return -CONFIG_INVALID_KEY;
}
int git_config_parse_key(const char *key, char **store_key, size_t *baselen)
{
return git_config_parse_key_1(key, store_key, baselen, 0);
}
int git_config_key_is_valid(const char *key)
{
return !git_config_parse_key_1(key, NULL, NULL, 1);
}
static int config_parse_pair(const char *key, const char *value,
config_fn_t fn, void *data)
{
char *canonical_name;
int ret;
if (!strlen(key))
return error(_("empty config key"));
if (git_config_parse_key(key, &canonical_name, NULL))
return -1;
ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
free(canonical_name);
return ret;
}
int git_config_parse_parameter(const char *text,
config_fn_t fn, void *data)
{
const char *value;
struct strbuf **pair;
int ret;
pair = strbuf_split_str(text, '=', 2);
if (!pair[0])
return error(_("bogus config parameter: %s"), text);
if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
strbuf_setlen(pair[0], pair[0]->len - 1);
value = pair[1] ? pair[1]->buf : "";
} else {
value = NULL;
}
strbuf_trim(pair[0]);
if (!pair[0]->len) {
strbuf_list_free(pair);
return error(_("bogus config parameter: %s"), text);
}
ret = config_parse_pair(pair[0]->buf, value, fn, data);
strbuf_list_free(pair);
return ret;
}
static int parse_config_env_list(char *env, config_fn_t fn, void *data)
{
char *cur = env;
while (cur && *cur) {
const char *key = sq_dequote_step(cur, &cur);
if (!key)
return error(_("bogus format in %s"),
CONFIG_DATA_ENVIRONMENT);
if (!cur || isspace(*cur)) {
/* old-style 'key=value' */
if (git_config_parse_parameter(key, fn, data) < 0)
return -1;
}
else if (*cur == '=') {
/* new-style 'key'='value' */
const char *value;
cur++;
if (*cur == '\'') {
/* quoted value */
value = sq_dequote_step(cur, &cur);
if (!value || (cur && !isspace(*cur))) {
return error(_("bogus format in %s"),
CONFIG_DATA_ENVIRONMENT);
}
} else if (!*cur || isspace(*cur)) {
/* implicit bool: 'key'= */
value = NULL;
} else {
return error(_("bogus format in %s"),
CONFIG_DATA_ENVIRONMENT);
}
if (config_parse_pair(key, value, fn, data) < 0)
return -1;
}
else {
/* unknown format */
return error(_("bogus format in %s"),
CONFIG_DATA_ENVIRONMENT);
}
if (cur) {
while (isspace(*cur))
cur++;
}
}
return 0;
}
int git_config_from_parameters(config_fn_t fn, void *data)
{
const char *env;
struct strbuf envvar = STRBUF_INIT;
struct strvec to_free = STRVEC_INIT;
int ret = 0;
char *envw = NULL;
struct config_source source;
memset(&source, 0, sizeof(source));
source.prev = cf;
source.origin_type = CONFIG_ORIGIN_CMDLINE;
cf = &source;
env = getenv(CONFIG_COUNT_ENVIRONMENT);
if (env) {
unsigned long count;
char *endp;
int i;
count = strtoul(env, &endp, 10);
if (*endp) {
ret = error(_("bogus count in %s"), CONFIG_COUNT_ENVIRONMENT);
goto out;
}
if (count > INT_MAX) {
ret = error(_("too many entries in %s"), CONFIG_COUNT_ENVIRONMENT);
goto out;
}
for (i = 0; i < count; i++) {
const char *key, *value;
strbuf_addf(&envvar, "GIT_CONFIG_KEY_%d", i);
key = getenv_safe(&to_free, envvar.buf);
if (!key) {
ret = error(_("missing config key %s"), envvar.buf);
goto out;
}
strbuf_reset(&envvar);
strbuf_addf(&envvar, "GIT_CONFIG_VALUE_%d", i);
value = getenv_safe(&to_free, envvar.buf);
if (!value) {
ret = error(_("missing config value %s"), envvar.buf);
goto out;
}
strbuf_reset(&envvar);
if (config_parse_pair(key, value, fn, data) < 0) {
ret = -1;
goto out;
}
}
}
env = getenv(CONFIG_DATA_ENVIRONMENT);
if (env) {
/* sq_dequote will write over it */
envw = xstrdup(env);
if (parse_config_env_list(envw, fn, data) < 0) {
ret = -1;
goto out;
}
}
out:
strbuf_release(&envvar);
strvec_clear(&to_free);
free(envw);
cf = source.prev;
return ret;
}
static int get_next_char(void)
{
int c = cf->do_fgetc(cf);
if (c == '\r') {
/* DOS like systems */
c = cf->do_fgetc(cf);
if (c != '\n') {
if (c != EOF)
cf->do_ungetc(c, cf);
c = '\r';
}
}
if (c != EOF && ++cf->total_len > INT_MAX) {
/*
* This is an absurdly long config file; refuse to parse
* further in order to protect downstream code from integer
* overflows. Note that we can't return an error specifically,
* but we can mark EOF and put trash in the return value,
* which will trigger a parse error.
*/
cf->eof = 1;
return 0;
}
if (c == '\n')
cf->linenr++;
if (c == EOF) {
cf->eof = 1;
cf->linenr++;
c = '\n';
}
return c;
}
static char *parse_value(void)
{
int quote = 0, comment = 0, space = 0;
strbuf_reset(&cf->value);
for (;;) {
int c = get_next_char();
if (c == '\n') {
if (quote) {
cf->linenr--;
return NULL;
}
return cf->value.buf;
}
if (comment)
continue;
if (isspace(c) && !quote) {
if (cf->value.len)
space++;
continue;
}
if (!quote) {
if (c == ';' || c == '#') {
comment = 1;
continue;
}
}
for (; space; space--)
strbuf_addch(&cf->value, ' ');
if (c == '\\') {
c = get_next_char();
switch (c) {
case '\n':
continue;
case 't':
c = '\t';
break;
case 'b':
c = '\b';
break;
case 'n':
c = '\n';
break;
/* Some characters escape as themselves */
case '\\': case '"':
break;
/* Reject unknown escape sequences */
default:
return NULL;
}
strbuf_addch(&cf->value, c);
continue;
}
if (c == '"') {
quote = 1-quote;
continue;
}
strbuf_addch(&cf->value, c);
}
}
static int get_value(config_fn_t fn, void *data, struct strbuf *name)
{
int c;
char *value;
int ret;
/* Get the full name */
for (;;) {
c = get_next_char();
if (cf->eof)
break;
if (!iskeychar(c))
break;
strbuf_addch(name, tolower(c));
}
while (c == ' ' || c == '\t')
c = get_next_char();
value = NULL;
if (c != '\n') {
if (c != '=')
return -1;
value = parse_value();
if (!value)
return -1;
}
/*
* We already consumed the \n, but we need linenr to point to
* the line we just parsed during the call to fn to get
* accurate line number in error messages.
*/
cf->linenr--;
ret = fn(name->buf, value, data);
if (ret >= 0)
cf->linenr++;
return ret;
}
static int get_extended_base_var(struct strbuf *name, int c)
{
cf->subsection_case_sensitive = 0;
do {
if (c == '\n')
goto error_incomplete_line;
c = get_next_char();
} while (isspace(c));
/* We require the format to be '[base "extension"]' */
if (c != '"')
return -1;
strbuf_addch(name, '.');
for (;;) {
int c = get_next_char();
if (c == '\n')
goto error_incomplete_line;
if (c == '"')
break;
if (c == '\\') {
c = get_next_char();
if (c == '\n')
goto error_incomplete_line;
}
strbuf_addch(name, c);
}
/* Final ']' */
if (get_next_char() != ']')
return -1;
return 0;
error_incomplete_line:
cf->linenr--;
return -1;
}
static int get_base_var(struct strbuf *name)
{
cf->subsection_case_sensitive = 1;
for (;;) {
int c = get_next_char();
if (cf->eof)
return -1;
if (c == ']')
return 0;
if (isspace(c))
return get_extended_base_var(name, c);
if (!iskeychar(c) && c != '.')
return -1;
strbuf_addch(name, tolower(c));
}
}
struct parse_event_data {
enum config_event_t previous_type;
size_t previous_offset;
const struct config_options *opts;
};
static int do_event(enum config_event_t type, struct parse_event_data *data)
{
size_t offset;
if (!data->opts || !data->opts->event_fn)
return 0;
if (type == CONFIG_EVENT_WHITESPACE &&
data->previous_type == type)
return 0;
offset = cf->do_ftell(cf);
/*
* At EOF, the parser always "inserts" an extra '\n', therefore
* the end offset of the event is the current file position, otherwise
* we will already have advanced to the next event.
*/
if (type != CONFIG_EVENT_EOF)
offset--;
if (data->previous_type != CONFIG_EVENT_EOF &&
data->opts->event_fn(data->previous_type, data->previous_offset,
offset, data->opts->event_fn_data) < 0)
return -1;
data->previous_type = type;
data->previous_offset = offset;
return 0;
}
static int git_parse_source(config_fn_t fn, void *data,
const struct config_options *opts)
{
int comment = 0;
size_t baselen = 0;
struct strbuf *var = &cf->var;
int error_return = 0;
char *error_msg = NULL;
/* U+FEFF Byte Order Mark in UTF8 */
const char *bomptr = utf8_bom;
/* For the parser event callback */
struct parse_event_data event_data = {
CONFIG_EVENT_EOF, 0, opts
};
for (;;) {
int c;
c = get_next_char();
if (bomptr && *bomptr) {
/* We are at the file beginning; skip UTF8-encoded BOM
* if present. Sane editors won't put this in on their
* own, but e.g. Windows Notepad will do it happily. */
if (c == (*bomptr & 0377)) {
bomptr++;
continue;
} else {
/* Do not tolerate partial BOM. */
if (bomptr != utf8_bom)
break;
/* No BOM at file beginning. Cool. */
bomptr = NULL;
}
}
if (c == '\n') {
if (cf->eof) {
if (do_event(CONFIG_EVENT_EOF, &event_data) < 0)
return -1;
return 0;
}
if (do_event(CONFIG_EVENT_WHITESPACE, &event_data) < 0)
return -1;
comment = 0;
continue;
}
if (comment)
continue;
if (isspace(c)) {
if (do_event(CONFIG_EVENT_WHITESPACE, &event_data) < 0)
return -1;
continue;
}
if (c == '#' || c == ';') {
if (do_event(CONFIG_EVENT_COMMENT, &event_data) < 0)
return -1;
comment = 1;
continue;
}
if (c == '[') {
if (do_event(CONFIG_EVENT_SECTION, &event_data) < 0)
return -1;
/* Reset prior to determining a new stem */
strbuf_reset(var);
if (get_base_var(var) < 0 || var->len < 1)
break;
strbuf_addch(var, '.');
baselen = var->len;
continue;
}
if (!isalpha(c))
break;
if (do_event(CONFIG_EVENT_ENTRY, &event_data) < 0)
return -1;
/*
* Truncate the var name back to the section header
* stem prior to grabbing the suffix part of the name
* and the value.
*/
strbuf_setlen(var, baselen);
strbuf_addch(var, tolower(c));
if (get_value(fn, data, var) < 0)
break;
}
if (do_event(CONFIG_EVENT_ERROR, &event_data) < 0)
return -1;
switch (cf->origin_type) {
case CONFIG_ORIGIN_BLOB:
error_msg = xstrfmt(_("bad config line %d in blob %s"),
cf->linenr, cf->name);
break;
case CONFIG_ORIGIN_FILE:
error_msg = xstrfmt(_("bad config line %d in file %s"),
cf->linenr, cf->name);
break;
case CONFIG_ORIGIN_STDIN:
error_msg = xstrfmt(_("bad config line %d in standard input"),
cf->linenr);
break;
case CONFIG_ORIGIN_SUBMODULE_BLOB:
error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
cf->linenr, cf->name);
break;
case CONFIG_ORIGIN_CMDLINE:
error_msg = xstrfmt(_("bad config line %d in command line %s"),
cf->linenr, cf->name);
break;
default:
error_msg = xstrfmt(_("bad config line %d in %s"),
cf->linenr, cf->name);
}
switch (opts && opts->error_action ?
opts->error_action :
cf->default_error_action) {
case CONFIG_ERROR_DIE:
die("%s", error_msg);
break;
case CONFIG_ERROR_ERROR:
error_return = error("%s", error_msg);
break;
case CONFIG_ERROR_SILENT:
error_return = -1;
break;
case CONFIG_ERROR_UNSET:
BUG("config error action unset");
}
free(error_msg);
return error_return;
}
static uintmax_t get_unit_factor(const char *end)
{
if (!*end)
return 1;
else if (!strcasecmp(end, "k"))
return 1024;
else if (!strcasecmp(end, "m"))
return 1024 * 1024;
else if (!strcasecmp(end, "g"))
return 1024 * 1024 * 1024;
return 0;
}
static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
{
if (value && *value) {
char *end;
intmax_t val;
uintmax_t uval;
uintmax_t factor;
errno = 0;
val = strtoimax(value, &end, 0);
if (errno == ERANGE)
return 0;
factor = get_unit_factor(end);
if (!factor) {
errno = EINVAL;
return 0;
}
uval = val < 0 ? -val : val;
if (unsigned_mult_overflows(factor, uval) ||
factor * uval > max) {
errno = ERANGE;
return 0;
}
val *= factor;
*ret = val;
return 1;
}
errno = EINVAL;
return 0;
}
static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
{
if (value && *value) {
char *end;
uintmax_t val;
uintmax_t factor;
errno = 0;
val = strtoumax(value, &end, 0);
if (errno == ERANGE)
return 0;
factor = get_unit_factor(end);
if (!factor) {
errno = EINVAL;
return 0;
}
if (unsigned_mult_overflows(factor, val) ||
factor * val > max) {
errno = ERANGE;
return 0;
}
val *= factor;
*ret = val;
return 1;
}
errno = EINVAL;
return 0;
}
static int git_parse_int(const char *value, int *ret)
{
intmax_t tmp;
if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
return 0;
*ret = tmp;
return 1;
}
static int git_parse_int64(const char *value, int64_t *ret)
{
intmax_t tmp;
if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
return 0;
*ret = tmp;
return 1;
}
int git_parse_ulong(const char *value, unsigned long *ret)
{
uintmax_t tmp;
if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
return 0;
*ret = tmp;
return 1;
}
int git_parse_ssize_t(const char *value, ssize_t *ret)
{
intmax_t tmp;
if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t)))
return 0;
*ret = tmp;
return 1;
}
NORETURN
static void die_bad_number(const char *name, const char *value)
{
const char *error_type = (errno == ERANGE) ?
N_("out of range") : N_("invalid unit");
const char *bad_numeric = N_("bad numeric config value '%s' for '%s': %s");
if (!value)
value = "";
if (!(cf && cf->name))
die(_(bad_numeric), value, name, _(error_type));
switch (cf->origin_type) {
case CONFIG_ORIGIN_BLOB:
die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
value, name, cf->name, _(error_type));
case CONFIG_ORIGIN_FILE:
die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
value, name, cf->name, _(error_type));
case CONFIG_ORIGIN_STDIN:
die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
value, name, _(error_type));
case CONFIG_ORIGIN_SUBMODULE_BLOB:
die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
value, name, cf->name, _(error_type));
case CONFIG_ORIGIN_CMDLINE:
die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
value, name, cf->name, _(error_type));
default:
die(_("bad numeric config value '%s' for '%s' in %s: %s"),
value, name, cf->name, _(error_type));
}
}
int git_config_int(const char *name, const char *value)
{
int ret;
if (!git_parse_int(value, &ret))
die_bad_number(name, value);
return ret;
}
int64_t git_config_int64(const char *name, const char *value)
{
int64_t ret;
if (!git_parse_int64(value, &ret))
die_bad_number(name, value);
return ret;
}
unsigned long git_config_ulong(const char *name, const char *value)
{
unsigned long ret;
if (!git_parse_ulong(value, &ret))
die_bad_number(name, value);
return ret;
}
ssize_t git_config_ssize_t(const char *name, const char *value)
{
ssize_t ret;
if (!git_parse_ssize_t(value, &ret))
die_bad_number(name, value);
return ret;
}
static int git_parse_maybe_bool_text(const char *value)
{
if (!value)
return 1;
if (!*value)
return 0;
if (!strcasecmp(value, "true")
|| !strcasecmp(value, "yes")
|| !strcasecmp(value, "on"))
return 1;
if (!strcasecmp(value, "false")
|| !strcasecmp(value, "no")
|| !strcasecmp(value, "off"))
return 0;
return -1;
}
int git_parse_maybe_bool(const char *value)
{
int v = git_parse_maybe_bool_text(value);
if (0 <= v)
return v;
if (git_parse_int(value, &v))
return !!v;
return -1;
}
int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
{
int v = git_parse_maybe_bool_text(value);
if (0 <= v) {
*is_bool = 1;
return v;
}
*is_bool = 0;
return git_config_int(name, value);
}
int git_config_bool(const char *name, const char *value)
{
int v = git_parse_maybe_bool(value);
if (v < 0)
die(_("bad boolean config value '%s' for '%s'"), value, name);
return v;
}
int git_config_string(const char **dest, const char *var, const char *value)
{
if (!value)
return config_error_nonbool(var);
*dest = xstrdup(value);
return 0;
}
int git_config_pathname(const char **dest, const char *var, const char *value)
{
if (!value)
return config_error_nonbool(var);
*dest = expand_user_path(value, 0);
if (!*dest)
die(_("failed to expand user dir in: '%s'"), value);
return 0;
}
int git_config_expiry_date(timestamp_t *timestamp, const char *var, const char *value)
{
if (!value)
return config_error_nonbool(var);
if (parse_expiry_date(value, timestamp))
return error(_("'%s' for '%s' is not a valid timestamp"),
value, var);
return 0;
}
int git_config_color(char *dest, const char *var, const char *value)
{
if (!value)
return config_error_nonbool(var);
if (color_parse(value, dest) < 0)
return -1;
return 0;
}
static int git_default_core_config(const char *var, const char *value, void *cb)
{
/* This needs a better name */
if (!strcmp(var, "core.filemode")) {
trust_executable_bit = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.trustctime")) {
trust_ctime = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.checkstat")) {
if (!strcasecmp(value, "default"))
check_stat = 1;
else if (!strcasecmp(value, "minimal"))
check_stat = 0;
}
if (!strcmp(var, "core.quotepath")) {
quote_path_fully = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.symlinks")) {
has_symlinks = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.ignorecase")) {
ignore_case = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.attributesfile"))
return git_config_pathname(&git_attributes_file, var, value);
if (!strcmp(var, "core.hookspath"))
return git_config_pathname(&git_hooks_path, var, value);
if (!strcmp(var, "core.bare")) {
is_bare_repository_cfg = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.ignorestat")) {
assume_unchanged = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.prefersymlinkrefs")) {
prefer_symlink_refs = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.logallrefupdates")) {
if (value && !strcasecmp(value, "always"))
log_all_ref_updates = LOG_REFS_ALWAYS;
else if (git_config_bool(var, value))
log_all_ref_updates = LOG_REFS_NORMAL;
else
log_all_ref_updates = LOG_REFS_NONE;
return 0;
}
if (!strcmp(var, "core.warnambiguousrefs")) {
warn_ambiguous_refs = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.abbrev")) {
if (!value)
return config_error_nonbool(var);
if (!strcasecmp(value, "auto"))
default_abbrev = -1;
else if (!git_parse_maybe_bool_text(value))
default_abbrev = the_hash_algo->hexsz;
else {
int abbrev = git_config_int(var, value);
if (abbrev < minimum_abbrev || abbrev > the_hash_algo->hexsz)
return error(_("abbrev length out of range: %d"), abbrev);
default_abbrev = abbrev;
}
return 0;
}
if (!strcmp(var, "core.disambiguate"))
return set_disambiguate_hint_config(var, value);
if (!strcmp(var, "core.loosecompression")) {
int level = git_config_int(var, value);
if (level == -1)
level = Z_DEFAULT_COMPRESSION;
else if (level < 0 || level > Z_BEST_COMPRESSION)
die(_("bad zlib compression level %d"), level);
zlib_compression_level = level;
zlib_compression_seen = 1;
return 0;
}
if (!strcmp(var, "core.compression")) {
int level = git_config_int(var, value);
if (level == -1)
level = Z_DEFAULT_COMPRESSION;
else if (level < 0 || level > Z_BEST_COMPRESSION)
die(_("bad zlib compression level %d"), level);
core_compression_level = level;
core_compression_seen = 1;
if (!zlib_compression_seen)
zlib_compression_level = level;
if (!pack_compression_seen)
pack_compression_level = level;
return 0;
}
if (!strcmp(var, "core.packedgitwindowsize")) {
int pgsz_x2 = getpagesize() * 2;
packed_git_window_size = git_config_ulong(var, value);
/* This value must be multiple of (pagesize * 2) */
packed_git_window_size /= pgsz_x2;
if (packed_git_window_size < 1)
packed_git_window_size = 1;
packed_git_window_size *= pgsz_x2;
return 0;
}
if (!strcmp(var, "core.bigfilethreshold")) {
big_file_threshold = git_config_ulong(var, value);
return 0;
}
if (!strcmp(var, "core.packedgitlimit")) {
packed_git_limit = git_config_ulong(var, value);
return 0;
}
if (!strcmp(var, "core.deltabasecachelimit")) {
delta_base_cache_limit = git_config_ulong(var, value);
return 0;
}
if (!strcmp(var, "core.autocrlf")) {
if (value && !strcasecmp(value, "input")) {
auto_crlf = AUTO_CRLF_INPUT;
return 0;
}
auto_crlf = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.safecrlf")) {
int eol_rndtrp_die;
if (value && !strcasecmp(value, "warn")) {
global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
return 0;
}
eol_rndtrp_die = git_config_bool(var, value);
global_conv_flags_eol = eol_rndtrp_die ?
CONV_EOL_RNDTRP_DIE : 0;
return 0;
}
if (!strcmp(var, "core.eol")) {
if (value && !strcasecmp(value, "lf"))
core_eol = EOL_LF;
else if (value && !strcasecmp(value, "crlf"))
core_eol = EOL_CRLF;
else if (value && !strcasecmp(value, "native"))
core_eol = EOL_NATIVE;
else
core_eol = EOL_UNSET;
return 0;
}
if (!strcmp(var, "core.checkroundtripencoding")) {
check_roundtrip_encoding = xstrdup(value);
return 0;
}
if (!strcmp(var, "core.notesref")) {
notes_ref_name = xstrdup(value);
return 0;
}
if (!strcmp(var, "core.editor"))
return git_config_string(&editor_program, var, value);
if (!strcmp(var, "core.commentchar")) {
if (!value)
return config_error_nonbool(var);
else if (!strcasecmp(value, "auto"))
auto_comment_line_char = 1;
else if (value[0] && !value[1]) {
comment_line_char = value[0];
auto_comment_line_char = 0;
} else
return error(_("core.commentChar should only be one character"));
return 0;
}
if (!strcmp(var, "core.askpass"))
return git_config_string(&askpass_program, var, value);
if (!strcmp(var, "core.excludesfile"))
return git_config_pathname(&excludes_file, var, value);
if (!strcmp(var, "core.whitespace")) {
if (!value)
return config_error_nonbool(var);
whitespace_rule_cfg = parse_whitespace_rule(value);
return 0;
}
if (!strcmp(var, "core.fsyncobjectfiles")) {
fsync_object_files = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.preloadindex")) {
core_preload_index = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.createobject")) {
if (!strcmp(value, "rename"))
object_creation_mode = OBJECT_CREATION_USES_RENAMES;
else if (!strcmp(value, "link"))
object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
else
die(_("invalid mode for object creation: %s"), value);
return 0;
}
if (!strcmp(var, "core.sparsecheckout")) {
core_apply_sparse_checkout = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.sparsecheckoutcone")) {
core_sparse_checkout_cone = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.precomposeunicode")) {
precomposed_unicode = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.protecthfs")) {
protect_hfs = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.protectntfs")) {
protect_ntfs = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "core.usereplacerefs")) {
read_replace_refs = git_config_bool(var, value);
return 0;
}
/* Add other config variables here and to Documentation/config.txt. */
return platform_core_config(var, value, cb);
}
static int git_default_i18n_config(const char *var, const char *value)
{
if (!strcmp(var, "i18n.commitencoding"))
return git_config_string(&git_commit_encoding, var, value);
if (!strcmp(var, "i18n.logoutputencoding"))
return git_config_string(&git_log_output_encoding, var, value);
/* Add other config variables here and to Documentation/config.txt. */
return 0;
}
static int git_default_branch_config(const char *var, const char *value)
{
if (!strcmp(var, "branch.autosetupmerge")) {
if (value && !strcasecmp(value, "always")) {
git_branch_track = BRANCH_TRACK_ALWAYS;
return 0;
}
git_branch_track = git_config_bool(var, value);
return 0;
}
if (!strcmp(var, "branch.autosetuprebase")) {
if (!value)
return config_error_nonbool(var);
else if (!strcmp(value, "never"))
autorebase = AUTOREBASE_NEVER;
else if (!strcmp(value, "local"))
autorebase = AUTOREBASE_LOCAL;
else if (!strcmp(value, "remote"))
autorebase = AUTOREBASE_REMOTE;
else if (!strcmp(value, "always"))
autorebase = AUTOREBASE_ALWAYS;
else
return error(_("malformed value for %s"), var);
return 0;
}
/* Add other config variables here and to Documentation/config.txt. */
return 0;
}
static int git_default_push_config(const char *var, const char *value)
{
if (!strcmp(var, "push.default")) {
if (!value)
return config_error_nonbool(var);
else if (!strcmp(value, "nothing"))
push_default = PUSH_DEFAULT_NOTHING;
else if (!strcmp(value, "matching"))
push_default = PUSH_DEFAULT_MATCHING;
else if (!strcmp(value, "simple"))
push_default = PUSH_DEFAULT_SIMPLE;
else if (!strcmp(value, "upstream"))
push_default = PUSH_DEFAULT_UPSTREAM;
else if (!strcmp(value, "tracking")) /* deprecated */
push_default = PUSH_DEFAULT_UPSTREAM;
else if (!strcmp(value, "current"))
push_default = PUSH_DEFAULT_CURRENT;
else {
error(_("malformed value for %s: %s"), var, value);
return error(_("must be one of nothing, matching, simple, "
"upstream or current"));
}
return 0;
}
/* Add other config variables here and to Documentation/config.txt. */
return 0;
}
static int git_default_mailmap_config(const char *var, const char *value)
{
if (!strcmp(var, "mailmap.file"))
return git_config_pathname(&git_mailmap_file, var, value);
if (!strcmp(var, "mailmap.blob"))
return git_config_string(&git_mailmap_blob, var, value);
/* Add other config variables here and to Documentation/config.txt. */
return 0;
}
int git_default_config(const char *var, const char *value, void *cb)
{
if (starts_with(var, "core."))
return git_default_core_config(var, value, cb);
if (starts_with(var, "user.") ||
starts_with(var, "author.") ||
starts_with(var, "committer."))
return git_ident_config(var, value, cb);
if (starts_with(var, "i18n."))
return git_default_i18n_config(var, value);
if (starts_with(var, "branch."))
return git_default_branch_config(var, value);
if (starts_with(var, "push."))
return git_default_push_config(var, value);
if (starts_with(var, "mailmap."))
return git_default_mailmap_config(var, value);
if (starts_with(var, "advice.") || starts_with(var, "color.advice"))
return git_default_advice_config(var, value);
if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
pager_use_color = git_config_bool(var,value);
return 0;
}
if (!strcmp(var, "pack.packsizelimit")) {
pack_size_limit_cfg = git_config_ulong(var, value);
return 0;
}
if (!strcmp(var, "pack.compression")) {
int level = git_config_int(var, value);
if (level == -1)
level = Z_DEFAULT_COMPRESSION;
else if (level < 0 || level > Z_BEST_COMPRESSION)
die(_("bad pack compression level %d"), level);
pack_compression_level = level;
pack_compression_seen = 1;
return 0;
}
/* Add other config variables here and to Documentation/config.txt. */
return 0;
}
/*
* All source specific fields in the union, die_on_error, name and the callbacks
* fgetc, ungetc, ftell of top need to be initialized before calling
* this function.
*/
static int do_config_from(struct config_source *top, config_fn_t fn, void *data,
const struct config_options *opts)
{
int ret;
/* push config-file parsing state stack */
top->prev = cf;
top->linenr = 1;
top->eof = 0;
top->total_len = 0;
strbuf_init(&top->value, 1024);
strbuf_init(&top->var, 1024);
cf = top;
ret = git_parse_source(fn, data, opts);
/* pop config-file parsing state stack */
strbuf_release(&top->value);
strbuf_release(&top->var);
cf = top->prev;
return ret;
}
static int do_config_from_file(config_fn_t fn,
const enum config_origin_type origin_type,
const char *name, const char *path, FILE *f,
void *data, const struct config_options *opts)
{
struct config_source top;
int ret;
top.u.file = f;
top.origin_type = origin_type;
top.name = name;
top.path = path;
top.default_error_action = CONFIG_ERROR_DIE;
top.do_fgetc = config_file_fgetc;
top.do_ungetc = config_file_ungetc;
top.do_ftell = config_file_ftell;
flockfile(f);
ret = do_config_from(&top, fn, data, opts);
funlockfile(f);
return ret;
}
static int git_config_from_stdin(config_fn_t fn, void *data)
{
return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin,
data, NULL);
}
int git_config_from_file_with_options(config_fn_t fn, const char *filename,
void *data,
const struct config_options *opts)
{
int ret = -1;
FILE *f;
f = fopen_or_warn(filename, "r");
if (f) {
ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename,
filename, f, data, opts);
fclose(f);
}
return ret;
}
int git_config_from_file(config_fn_t fn, const char *filename, void *data)
{
return git_config_from_file_with_options(fn, filename, data, NULL);
}
int git_config_from_mem(config_fn_t fn,
const enum config_origin_type origin_type,
const char *name, const char *buf, size_t len,
void *data, const struct config_options *opts)
{
struct config_source top;
top.u.buf.buf = buf;
top.u.buf.len = len;
top.u.buf.pos = 0;
top.origin_type = origin_type;
top.name = name;
top.path = NULL;
top.default_error_action = CONFIG_ERROR_ERROR;
top.do_fgetc = config_buf_fgetc;
top.do_ungetc = config_buf_ungetc;
top.do_ftell = config_buf_ftell;
return do_config_from(&top, fn, data, opts);
}
int git_config_from_blob_oid(config_fn_t fn,
const char *name,
const struct object_id *oid,
void *data)
{
enum object_type type;
char *buf;
unsigned long size;
int ret;
buf = read_object_file(oid, &type, &size);
if (!buf)
return error(_("unable to load config blob object '%s'"), name);
if (type != OBJ_BLOB) {
free(buf);
return error(_("reference '%s' does not point to a blob"), name);
}
ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size,
data, NULL);
free(buf);
return ret;
}
static int git_config_from_blob_ref(config_fn_t fn,
const char *name,
void *data)
{
struct object_id oid;
if (get_oid(name, &oid) < 0)
return error(_("unable to resolve config blob '%s'"), name);
return git_config_from_blob_oid(fn, name, &oid, data);
}
char *git_system_config(void)
{
char *system_config = xstrdup_or_null(getenv("GIT_CONFIG_SYSTEM"));
if (system_config)
return system_config;
return system_path(ETC_GITCONFIG);
}
void git_global_config(char **user_out, char **xdg_out)
{
char *user_config = xstrdup_or_null(getenv("GIT_CONFIG_GLOBAL"));
char *xdg_config = NULL;
if (!user_config) {
user_config = expand_user_path("~/.gitconfig", 0);
xdg_config = xdg_config_home("config");
}
*user_out = user_config;
*xdg_out = xdg_config;
}
/*
* Parse environment variable 'k' as a boolean (in various
* possible spellings); if missing, use the default value 'def'.
*/
int git_env_bool(const char *k, int def)
{
const char *v = getenv(k);
return v ? git_config_bool(k, v) : def;
}
/*
* Parse environment variable 'k' as ulong with possibly a unit
* suffix; if missing, use the default value 'val'.
*/
unsigned long git_env_ulong(const char *k, unsigned long val)
{
const char *v = getenv(k);
if (v && !git_parse_ulong(v, &val))
die(_("failed to parse %s"), k);
return val;
}
int git_config_system(void)
{
return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
}
static int do_git_config_sequence(const struct config_options *opts,
config_fn_t fn, void *data)
{
int ret = 0;
char *system_config = git_system_config();
char *xdg_config = NULL;
char *user_config = NULL;
char *repo_config;
enum config_scope prev_parsing_scope = current_parsing_scope;
if (opts->commondir)
repo_config = mkpathdup("%s/config", opts->commondir);
else if (opts->git_dir)
BUG("git_dir without commondir");
else
repo_config = NULL;
current_parsing_scope = CONFIG_SCOPE_SYSTEM;
if (git_config_system() && system_config &&
!access_or_die(system_config, R_OK,
opts->system_gently ? ACCESS_EACCES_OK : 0))
ret += git_config_from_file(fn, system_config, data);
current_parsing_scope = CONFIG_SCOPE_GLOBAL;
git_global_config(&user_config, &xdg_config);
if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
ret += git_config_from_file(fn, xdg_config, data);
if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
ret += git_config_from_file(fn, user_config, data);
current_parsing_scope = CONFIG_SCOPE_LOCAL;
if (!opts->ignore_repo && repo_config &&
!access_or_die(repo_config, R_OK, 0))
ret += git_config_from_file(fn, repo_config, data);
current_parsing_scope = CONFIG_SCOPE_WORKTREE;
if (!opts->ignore_worktree && repository_format_worktree_config) {
char *path = git_pathdup("config.worktree");
if (!access_or_die(path, R_OK, 0))
ret += git_config_from_file(fn, path, data);
free(path);
}
current_parsing_scope = CONFIG_SCOPE_COMMAND;
if (!opts->ignore_cmdline && git_config_from_parameters(fn, data) < 0)
die(_("unable to parse command-line config"));
current_parsing_scope = prev_parsing_scope;
free(system_config);
free(xdg_config);
free(user_config);
free(repo_config);
return ret;
}
int config_with_options(config_fn_t fn, void *data,
struct git_config_source *config_source,
const struct config_options *opts)
{
struct config_include_data inc = CONFIG_INCLUDE_INIT;
if (opts->respect_includes) {
inc.fn = fn;
inc.data = data;
inc.opts = opts;
fn = git_config_include;
data = &inc;
}
if (config_source)
current_parsing_scope = config_source->scope;
/*
* If we have a specific filename, use it. Otherwise, follow the
* regular lookup sequence.
*/
if (config_source && config_source->use_stdin)
return git_config_from_stdin(fn, data);
else if (config_source && config_source->file)
return git_config_from_file(fn, config_source->file, data);
else if (config_source && config_source->blob)
return git_config_from_blob_ref(fn, config_source->blob, data);
return do_git_config_sequence(opts, fn, data);
}
static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
{
int i, value_index;
struct string_list *values;
struct config_set_element *entry;
struct configset_list *list = &cs->list;
for (i = 0; i < list->nr; i++) {
entry = list->items[i].e;
value_index = list->items[i].value_index;
values = &entry->value_list;
current_config_kvi = values->items[value_index].util;
if (fn(entry->key, values->items[value_index].string, data) < 0)
git_die_config_linenr(entry->key,
current_config_kvi->filename,
current_config_kvi->linenr);
current_config_kvi = NULL;
}
}
void read_early_config(config_fn_t cb, void *data)
{
struct config_options opts = {0};
struct strbuf commondir = STRBUF_INIT;
struct strbuf gitdir = STRBUF_INIT;
opts.respect_includes = 1;
if (have_git_dir()) {
opts.commondir = get_git_common_dir();
opts.git_dir = get_git_dir();
/*
* When setup_git_directory() was not yet asked to discover the
* GIT_DIR, we ask discover_git_directory() to figure out whether there
* is any repository config we should use (but unlike
* setup_git_directory_gently(), no global state is changed, most
* notably, the current working directory is still the same after the
* call).
*/
} else if (!discover_git_directory(&commondir, &gitdir)) {
opts.commondir = commondir.buf;
opts.git_dir = gitdir.buf;
}
config_with_options(cb, data, NULL, &opts);
strbuf_release(&commondir);
strbuf_release(&gitdir);
}
/*
* Read config but only enumerate system and global settings.
* Omit any repo-local, worktree-local, or command-line settings.
*/
void read_very_early_config(config_fn_t cb, void *data)
{
struct config_options opts = { 0 };
opts.respect_includes = 1;
opts.ignore_repo = 1;
opts.ignore_worktree = 1;
opts.ignore_cmdline = 1;
opts.system_gently = 1;
config_with_options(cb, data, NULL, &opts);
}
static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
{
struct config_set_element k;
struct config_set_element *found_entry;
char *normalized_key;
/*
* `key` may come from the user, so normalize it before using it
* for querying entries from the hashmap.
*/
if (git_config_parse_key(key, &normalized_key, NULL))
return NULL;
hashmap_entry_init(&k.ent, strhash(normalized_key));
k.key = normalized_key;
found_entry = hashmap_get_entry(&cs->config_hash, &k, ent, NULL);
free(normalized_key);
return found_entry;
}
static int configset_add_value(struct config_set *cs, const char *key, const char *value)
{
struct config_set_element *e;
struct string_list_item *si;
struct configset_list_item *l_item;
struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
e = configset_find_element(cs, key);
/*
* Since the keys are being fed by git_config*() callback mechanism, they
* are already normalized. So simply add them without any further munging.
*/
if (!e) {
e = xmalloc(sizeof(*e));
hashmap_entry_init(&e->ent, strhash(key));
e->key = xstrdup(key);
string_list_init(&e->value_list, 1);
hashmap_add(&cs->config_hash, &e->ent);
}
si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
l_item = &cs->list.items[cs->list.nr++];
l_item->e = e;
l_item->value_index = e->value_list.nr - 1;
if (!cf)
BUG("configset_add_value has no source");
if (cf->name) {
kv_info->filename = strintern(cf->name);
kv_info->linenr = cf->linenr;
kv_info->origin_type = cf->origin_type;
} else {
/* for values read from `git_config_from_parameters()` */
kv_info->filename = NULL;
kv_info->linenr = -1;
kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
}
kv_info->scope = current_parsing_scope;
si->util = kv_info;
return 0;
}
static int config_set_element_cmp(const void *unused_cmp_data,
const struct hashmap_entry *eptr,
const struct hashmap_entry *entry_or_key,
const void *unused_keydata)
{
const struct config_set_element *e1, *e2;
e1 = container_of(eptr, const struct config_set_element, ent);
e2 = container_of(entry_or_key, const struct config_set_element, ent);
return strcmp(e1->key, e2->key);
}
void git_configset_init(struct config_set *cs)
{
hashmap_init(&cs->config_hash, config_set_element_cmp, NULL, 0);
cs->hash_initialized = 1;
cs->list.nr = 0;
cs->list.alloc = 0;
cs->list.items = NULL;
}
void git_configset_clear(struct config_set *cs)
{
struct config_set_element *entry;
struct hashmap_iter iter;
if (!cs->hash_initialized)
return;
hashmap_for_each_entry(&cs->config_hash, &iter, entry,
ent /* member name */) {
free(entry->key);
string_list_clear(&entry->value_list, 1);
}
hashmap_clear_and_free(&cs->config_hash, struct config_set_element, ent);
cs->hash_initialized = 0;
free(cs->list.items);
cs->list.nr = 0;
cs->list.alloc = 0;
cs->list.items = NULL;
}
static int config_set_callback(const char *key, const char *value, void *cb)
{
struct config_set *cs = cb;
configset_add_value(cs, key, value);
return 0;
}
int git_configset_add_file(struct config_set *cs, const char *filename)
{
return git_config_from_file(config_set_callback, filename, cs);
}
int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
{
const struct string_list *values = NULL;
/*
* Follows "last one wins" semantic, i.e., if there are multiple matches for the
* queried key in the files of the configset, the value returned will be the last
* value in the value list for that key.
*/
values = git_configset_get_value_multi(cs, key);
if (!values)
return 1;
assert(values->nr > 0);
*value = values->items[values->nr - 1].string;
return 0;
}
const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
{
struct config_set_element *e = configset_find_element(cs, key);
return e ? &e->value_list : NULL;
}
int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
{
const char *value;
if (!git_configset_get_value(cs, key, &value))
return git_config_string((const char **)dest, key, value);
else
return 1;
}
int git_configset_get_string_tmp(struct config_set *cs, const char *key,
const char **dest)
{
const char *value;
if (!git_configset_get_value(cs, key, &value)) {
if (!value)
return config_error_nonbool(key);
*dest = value;
return 0;
} else {
return 1;
}
}
int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
{
const char *value;
if (!git_configset_get_value(cs, key, &value)) {
*dest = git_config_int(key, value);
return 0;
} else
return 1;
}
int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
{
const char *value;
if (!git_configset_get_value(cs, key, &value)) {
*dest = git_config_ulong(key, value);
return 0;
} else
return 1;
}
int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
{
const char *value;
if (!git_configset_get_value(cs, key, &value)) {
*dest = git_config_bool(key, value);
return 0;
} else
return 1;
}
int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
int *is_bool, int *dest)
{
const char *value;
if (!git_configset_get_value(cs, key, &value)) {
*dest = git_config_bool_or_int(key, value, is_bool);
return 0;
} else
return 1;
}
int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
{
const char *value;
if (!git_configset_get_value(cs, key, &value)) {
*dest = git_parse_maybe_bool(value);
if (*dest == -1)
return -1;
return 0;
} else
return 1;
}
int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
{
const char *value;
if (!git_configset_get_value(cs, key, &value))
return git_config_pathname(dest, key, value);
else
return 1;
}
/* Functions use to read configuration from a repository */
static void repo_read_config(struct repository *repo)
{
struct config_options opts = { 0 };
opts.respect_includes = 1;
opts.commondir = repo->commondir;
opts.git_dir = repo->gitdir;
if (!repo->config)
CALLOC_ARRAY(repo->config, 1);
else
git_configset_clear(repo->config);
git_configset_init(repo->config);
if (config_with_options(config_set_callback, repo->config, NULL, &opts) < 0)
/*
* config_with_options() normally returns only
* zero, as most errors are fatal, and
* non-fatal potential errors are guarded by "if"
* statements that are entered only when no error is
* possible.
*
* If we ever encounter a non-fatal error, it means
* something went really wrong and we should stop
* immediately.
*/
die(_("unknown error occurred while reading the configuration files"));
}
static void git_config_check_init(struct repository *repo)
{
if (repo->config && repo->config->hash_initialized)
return;
repo_read_config(repo);
}
static void repo_config_clear(struct repository *repo)
{
if (!repo->config || !repo->config->hash_initialized)
return;
git_configset_clear(repo->config);
}
void repo_config(struct repository *repo, config_fn_t fn, void *data)
{
git_config_check_init(repo);
configset_iter(repo->config, fn, data);
}
int repo_config_get_value(struct repository *repo,
const char *key, const char **value)
{
git_config_check_init(repo);
return git_configset_get_value(repo->config, key, value);
}
const struct string_list *repo_config_get_value_multi(struct repository *repo,
const char *key)
{
git_config_check_init(repo);
return git_configset_get_value_multi(repo->config, key);
}
int repo_config_get_string(struct repository *repo,
const char *key, char **dest)
{
int ret;
git_config_check_init(repo);
ret = git_configset_get_string(repo->config, key, dest);
if (ret < 0)
git_die_config(key, NULL);
return ret;
}
int repo_config_get_string_tmp(struct repository *repo,
const char *key, const char **dest)
{
int ret;
git_config_check_init(repo);
ret = git_configset_get_string_tmp(repo->config, key, dest);
if (ret < 0)
git_die_config(key, NULL);
return ret;
}
int repo_config_get_int(struct repository *repo,
const char *key, int *dest)
{
git_config_check_init(repo);
return git_configset_get_int(repo->config, key, dest);
}
int repo_config_get_ulong(struct repository *repo,
const char *key, unsigned long *dest)
{
git_config_check_init(repo);
return git_configset_get_ulong(repo->config, key, dest);
}
int repo_config_get_bool(struct repository *repo,
const char *key, int *dest)
{
git_config_check_init(repo);
return git_configset_get_bool(repo->config, key, dest);
}
int repo_config_get_bool_or_int(struct repository *repo,
const char *key, int *is_bool, int *dest)
{
git_config_check_init(repo);
return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
}
int repo_config_get_maybe_bool(struct repository *repo,
const char *key, int *dest)
{
git_config_check_init(repo);
return git_configset_get_maybe_bool(repo->config, key, dest);
}
int repo_config_get_pathname(struct repository *repo,
const char *key, const char **dest)
{
int ret;
git_config_check_init(repo);
ret = git_configset_get_pathname(repo->config, key, dest);
if (ret < 0)
git_die_config(key, NULL);
return ret;
}
/* Functions used historically to read configuration from 'the_repository' */
void git_config(config_fn_t fn, void *data)
{
repo_config(the_repository, fn, data);
}
void git_config_clear(void)
{
repo_config_clear(the_repository);
}
int git_config_get_value(const char *key, const char **value)
{
return repo_config_get_value(the_repository, key, value);
}
const struct string_list *git_config_get_value_multi(const char *key)
{
return repo_config_get_value_multi(the_repository, key);
}
int git_config_get_string(const char *key, char **dest)
{
return repo_config_get_string(the_repository, key, dest);
}
int git_config_get_string_tmp(const char *key, const char **dest)
{
return repo_config_get_string_tmp(the_repository, key, dest);
}
int git_config_get_int(const char *key, int *dest)
{
return repo_config_get_int(the_repository, key, dest);
}
int git_config_get_ulong(const char *key, unsigned long *dest)
{
return repo_config_get_ulong(the_repository, key, dest);
}
int git_config_get_bool(const char *key, int *dest)
{
return repo_config_get_bool(the_repository, key, dest);
}
int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
{
return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
}
int git_config_get_maybe_bool(const char *key, int *dest)
{
return repo_config_get_maybe_bool(the_repository, key, dest);
}
int git_config_get_pathname(const char *key, const char **dest)
{
return repo_config_get_pathname(the_repository, key, dest);
}
int git_config_get_expiry(const char *key, const char **output)
{
int ret = git_config_get_string(key, (char **)output);
if (ret)
return ret;
if (strcmp(*output, "now")) {
timestamp_t now = approxidate("now");
if (approxidate(*output) >= now)
git_die_config(key, _("Invalid %s: '%s'"), key, *output);
}
return ret;
}
int git_config_get_expiry_in_days(const char *key, timestamp_t *expiry, timestamp_t now)
{
const char *expiry_string;
intmax_t days;
timestamp_t when;
if (git_config_get_string_tmp(key, &expiry_string))
return 1; /* no such thing */
if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) {
const int scale = 86400;
*expiry = now - days * scale;
return 0;
}
if (!parse_expiry_date(expiry_string, &when)) {
*expiry = when;
return 0;
}
return -1; /* thing exists but cannot be parsed */
}
int git_config_get_split_index(void)
{
int val;
if (!git_config_get_maybe_bool("core.splitindex", &val))
return val;
return -1; /* default value */
}
int git_config_get_max_percent_split_change(void)
{
int val = -1;
if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
if (0 <= val && val <= 100)
return val;
return error(_("splitIndex.maxPercentChange value '%d' "
"should be between 0 and 100"), val);
}
return -1; /* default value */
}
int git_config_get_fsmonitor(void)
{
if (git_config_get_pathname("core.fsmonitor", &core_fsmonitor))
core_fsmonitor = getenv("GIT_TEST_FSMONITOR");
if (core_fsmonitor && !*core_fsmonitor)
core_fsmonitor = NULL;
if (core_fsmonitor)
return 1;
return 0;
}
int git_config_get_index_threads(int *dest)
{
int is_bool, val;
val = git_env_ulong("GIT_TEST_INDEX_THREADS", 0);
if (val) {
*dest = val;
return 0;
}
if (!git_config_get_bool_or_int("index.threads", &is_bool, &val)) {
if (is_bool)
*dest = val ? 0 : 1;
else
*dest = val;
return 0;
}
return 1;
}
NORETURN
void git_die_config_linenr(const char *key, const char *filename, int linenr)
{
if (!filename)
die(_("unable to parse '%s' from command-line config"), key);
else
die(_("bad config variable '%s' in file '%s' at line %d"),
key, filename, linenr);
}
NORETURN __attribute__((format(printf, 2, 3)))
void git_die_config(const char *key, const char *err, ...)
{
const struct string_list *values;
struct key_value_info *kv_info;
if (err) {
va_list params;
va_start(params, err);
vreportf("error: ", err, params);
va_end(params);
}
values = git_config_get_value_multi(key);
kv_info = values->items[values->nr - 1].util;
git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
}
/*
* Find all the stuff for git_config_set() below.
*/
struct config_store_data {
size_t baselen;
char *key;
int do_not_match;
const char *fixed_value;
regex_t *value_pattern;
int multi_replace;
struct {
size_t begin, end;
enum config_event_t type;
int is_keys_section;
} *parsed;
unsigned int parsed_nr, parsed_alloc, *seen, seen_nr, seen_alloc;
unsigned int key_seen:1, section_seen:1, is_keys_section:1;
};
static void config_store_data_clear(struct config_store_data *store)
{
free(store->key);
if (store->value_pattern != NULL &&
store->value_pattern != CONFIG_REGEX_NONE) {
regfree(store->value_pattern);
free(store->value_pattern);
}
free(store->parsed);
free(store->seen);
memset(store, 0, sizeof(*store));
}
static int matches(const char *key, const char *value,
const struct config_store_data *store)
{
if (strcmp(key, store->key))
return 0; /* not ours */
if (store->fixed_value)
return !strcmp(store->fixed_value, value);
if (!store->value_pattern)
return 1; /* always matches */
if (store->value_pattern == CONFIG_REGEX_NONE)
return 0; /* never matches */
return store->do_not_match ^
(value && !regexec(store->value_pattern, value, 0, NULL, 0));
}
static int store_aux_event(enum config_event_t type,
size_t begin, size_t end, void *data)
{
struct config_store_data *store = data;
ALLOC_GROW(store->parsed, store->parsed_nr + 1, store->parsed_alloc);
store->parsed[store->parsed_nr].begin = begin;
store->parsed[store->parsed_nr].end = end;
store->parsed[store->parsed_nr].type = type;
if (type == CONFIG_EVENT_SECTION) {
int (*cmpfn)(const char *, const char *, size_t);
if (cf->var.len < 2 || cf->var.buf[cf->var.len - 1] != '.')
return error(_("invalid section name '%s'"), cf->var.buf);
if (cf->subsection_case_sensitive)
cmpfn = strncasecmp;
else
cmpfn = strncmp;
/* Is this the section we were looking for? */
store->is_keys_section =
store->parsed[store->parsed_nr].is_keys_section =
cf->var.len - 1 == store->baselen &&
!cmpfn(cf->var.buf, store->key, store->baselen);
if (store->is_keys_section) {
store->section_seen = 1;
ALLOC_GROW(store->seen, store->seen_nr + 1,
store->seen_alloc);
store->seen[store->seen_nr] = store->parsed_nr;
}
}
store->parsed_nr++;
return 0;
}
static int store_aux(const char *key, const char *value, void *cb)
{
struct config_store_data *store = cb;
if (store->key_seen) {
if (matches(key, value, store)) {
if (store->seen_nr == 1 && store->multi_replace == 0) {
warning(_("%s has multiple values"), key);
}
ALLOC_GROW(store->seen, store->seen_nr + 1,
store->seen_alloc);
store->seen[store->seen_nr] = store->parsed_nr;
store->seen_nr++;
}
} else if (store->is_keys_section) {
/*
* Do not increment matches yet: this may not be a match, but we
* are in the desired section.
*/
ALLOC_GROW(store->seen, store->seen_nr + 1, store->seen_alloc);
store->seen[store->seen_nr] = store->parsed_nr;
store->section_seen = 1;
if (matches(key, value, store)) {
store->seen_nr++;
store->key_seen = 1;
}
}
return 0;
}
static int write_error(const char *filename)
{
error(_("failed to write new configuration file %s"), filename);
/* Same error code as "failed to rename". */
return 4;
}
static struct strbuf store_create_section(const char *key,
const struct config_store_data *store)
{
const char *dot;
size_t i;
struct strbuf sb = STRBUF_INIT;
dot = memchr(key, '.', store->baselen);
if (dot) {
strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
for (i = dot - key + 1; i < store->baselen; i++) {
if (key[i] == '"' || key[i] == '\\')
strbuf_addch(&sb, '\\');
strbuf_addch(&sb, key[i]);
}
strbuf_addstr(&sb, "\"]\n");
} else {
strbuf_addch(&sb, '[');
strbuf_add(&sb, key, store->baselen);
strbuf_addstr(&sb, "]\n");
}
return sb;
}
static ssize_t write_section(int fd, const char *key,
const struct config_store_data *store)
{
struct strbuf sb = store_create_section(key, store);
ssize_t ret;
ret = write_in_full(fd, sb.buf, sb.len);
strbuf_release(&sb);
return ret;
}
static ssize_t write_pair(int fd, const char *key, const char *value,
const struct config_store_data *store)
{
int i;
ssize_t ret;
const char *quote = "";
struct strbuf sb = STRBUF_INIT;
/*
* Check to see if the value needs to be surrounded with a dq pair.
* Note that problematic characters are always backslash-quoted; this
* check is about not losing leading or trailing SP and strings that
* follow beginning-of-comment characters (i.e. ';' and '#') by the
* configuration parser.
*/
if (value[0] == ' ')
quote = "\"";
for (i = 0; value[i]; i++)
if (value[i] == ';' || value[i] == '#')
quote = "\"";
if (i && value[i - 1] == ' ')
quote = "\"";
strbuf_addf(&sb, "\t%s = %s", key + store->baselen + 1, quote);
for (i = 0; value[i]; i++)
switch (value[i]) {
case '\n':
strbuf_addstr(&sb, "\\n");
break;
case '\t':
strbuf_addstr(&sb, "\\t");
break;
case '"':
case '\\':
strbuf_addch(&sb, '\\');
/* fallthrough */
default:
strbuf_addch(&sb, value[i]);
break;
}
strbuf_addf(&sb, "%s\n", quote);
ret = write_in_full(fd, sb.buf, sb.len);
strbuf_release(&sb);
return ret;
}
/*
* If we are about to unset the last key(s) in a section, and if there are
* no comments surrounding (or included in) the section, we will want to
* extend begin/end to remove the entire section.
*
* Note: the parameter `seen_ptr` points to the index into the store.seen
* array. * This index may be incremented if a section has more than one
* entry (which all are to be removed).
*/
static void maybe_remove_section(struct config_store_data *store,
size_t *begin_offset, size_t *end_offset,
int *seen_ptr)
{
size_t begin;
int i, seen, section_seen = 0;
/*
* First, ensure that this is the first key, and that there are no
* comments before the entry nor before the section header.
*/
seen = *seen_ptr;
for (i = store->seen[seen]; i > 0; i--) {
enum config_event_t type = store->parsed[i - 1].type;
if (type == CONFIG_EVENT_COMMENT)
/* There is a comment before this entry or section */
return;
if (type == CONFIG_EVENT_ENTRY) {
if (!section_seen)
/* This is not the section's first entry. */
return;
/* We encountered no comment before the section. */
break;
}
if (type == CONFIG_EVENT_SECTION) {
if (!store->parsed[i - 1].is_keys_section)
break;
section_seen = 1;
}
}
begin = store->parsed[i].begin;
/*
* Next, make sure that we are removing he last key(s) in the section,
* and that there are no comments that are possibly about the current
* section.
*/
for (i = store->seen[seen] + 1; i < store->parsed_nr; i++) {
enum config_event_t type = store->parsed[i].type;
if (type == CONFIG_EVENT_COMMENT)
return;
if (type == CONFIG_EVENT_SECTION) {
if (store->parsed[i].is_keys_section)
continue;
break;
}
if (type == CONFIG_EVENT_ENTRY) {
if (++seen < store->seen_nr &&
i == store->seen[seen])
/* We want to remove this entry, too */
continue;
/* There is another entry in this section. */
return;
}
}
/*
* We are really removing the last entry/entries from this section, and
* there are no enclosed or surrounding comments. Remove the entire,
* now-empty section.
*/
*seen_ptr = seen;
*begin_offset = begin;
if (i < store->parsed_nr)
*end_offset = store->parsed[i].begin;
else
*end_offset = store->parsed[store->parsed_nr - 1].end;
}
int git_config_set_in_file_gently(const char *config_filename,
const char *key, const char *value)
{
return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
}
void git_config_set_in_file(const char *config_filename,
const char *key, const char *value)
{
git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
}
int git_config_set_gently(const char *key, const char *value)
{
return git_config_set_multivar_gently(key, value, NULL, 0);
}
void git_config_set(const char *key, const char *value)
{
git_config_set_multivar(key, value, NULL, 0);
trace2_cmd_set_config(key, value);
}
/*
* If value==NULL, unset in (remove from) config,
* if value_pattern!=NULL, disregard key/value pairs where value does not match.
* if value_pattern==CONFIG_REGEX_NONE, do not match any existing values
* (only add a new one)
* if flags contains the CONFIG_FLAGS_MULTI_REPLACE flag, all matching
* key/values are removed before a single new pair is written. If the
* flag is not present, then replace only the first match.
*
* Returns 0 on success.
*
* This function does this:
*
* - it locks the config file by creating ".git/config.lock"
*
* - it then parses the config using store_aux() as validator to find
* the position on the key/value pair to replace. If it is to be unset,
* it must be found exactly once.
*
* - the config file is mmap()ed and the part before the match (if any) is
* written to the lock file, then the changed part and the rest.
*
* - the config file is removed and the lock file rename()d to it.
*
*/
int git_config_set_multivar_in_file_gently(const char *config_filename,
const char *key, const char *value,
const char *value_pattern,
unsigned flags)
{
int fd = -1, in_fd = -1;
int ret;
struct lock_file lock = LOCK_INIT;
char *filename_buf = NULL;
char *contents = NULL;
size_t contents_sz;
struct config_store_data store;
memset(&store, 0, sizeof(store));
/* parse-key returns negative; flip the sign to feed exit(3) */
ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
if (ret)
goto out_free;
store.multi_replace = (flags & CONFIG_FLAGS_MULTI_REPLACE) != 0;
if (!config_filename)
config_filename = filename_buf = git_pathdup("config");
/*
* The lock serves a purpose in addition to locking: the new
* contents of .git/config will be written into it.
*/
fd = hold_lock_file_for_update(&lock, config_filename, 0);
if (fd < 0) {
error_errno(_("could not lock config file %s"), config_filename);
ret = CONFIG_NO_LOCK;
goto out_free;
}
/*
* If .git/config does not exist yet, write a minimal version.
*/
in_fd = open(config_filename, O_RDONLY);
if ( in_fd < 0 ) {
if ( ENOENT != errno ) {
error_errno(_("opening %s"), config_filename);
ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
goto out_free;
}
/* if nothing to unset, error out */
if (value == NULL) {
ret = CONFIG_NOTHING_SET;
goto out_free;
}
free(store.key);
store.key = xstrdup(key);
if (write_section(fd, key, &store) < 0 ||
write_pair(fd, key, value, &store) < 0)
goto write_err_out;
} else {
struct stat st;
size_t copy_begin, copy_end;
int i, new_line = 0;
struct config_options opts;
if (value_pattern == NULL)
store.value_pattern = NULL;
else if (value_pattern == CONFIG_REGEX_NONE)
store.value_pattern = CONFIG_REGEX_NONE;
else if (flags & CONFIG_FLAGS_FIXED_VALUE)
store.fixed_value = value_pattern;
else {
if (value_pattern[0] == '!') {
store.do_not_match = 1;
value_pattern++;
} else
store.do_not_match = 0;
store.value_pattern = (regex_t*)xmalloc(sizeof(regex_t));
if (regcomp(store.value_pattern, value_pattern,
REG_EXTENDED)) {
error(_("invalid pattern: %s"), value_pattern);
FREE_AND_NULL(store.value_pattern);
ret = CONFIG_INVALID_PATTERN;
goto out_free;
}
}
ALLOC_GROW(store.parsed, 1, store.parsed_alloc);
store.parsed[0].end = 0;
memset(&opts, 0, sizeof(opts));
opts.event_fn = store_aux_event;
opts.event_fn_data = &store;
/*
* After this, store.parsed will contain offsets of all the
* parsed elements, and store.seen will contain a list of
* matches, as indices into store.parsed.
*
* As a side effect, we make sure to transform only a valid
* existing config file.
*/
if (git_config_from_file_with_options(store_aux,
config_filename,
&store, &opts)) {
error(_("invalid config file %s"), config_filename);
ret = CONFIG_INVALID_FILE;
goto out_free;
}
/* if nothing to unset, or too many matches, error out */
if ((store.seen_nr == 0 && value == NULL) ||
(store.seen_nr > 1 && !store.multi_replace)) {
ret = CONFIG_NOTHING_SET;
goto out_free;
}
if (fstat(in_fd, &st) == -1) {
error_errno(_("fstat on %s failed"), config_filename);
ret = CONFIG_INVALID_FILE;
goto out_free;
}
contents_sz = xsize_t(st.st_size);
contents = xmmap_gently(NULL, contents_sz, PROT_READ,
MAP_PRIVATE, in_fd, 0);
if (contents == MAP_FAILED) {
if (errno == ENODEV && S_ISDIR(st.st_mode))
errno = EISDIR;
error_errno(_("unable to mmap '%s'"), config_filename);
ret = CONFIG_INVALID_FILE;
contents = NULL;
goto out_free;
}
close(in_fd);
in_fd = -1;
if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
error_errno(_("chmod on %s failed"), get_lock_file_path(&lock));
ret = CONFIG_NO_WRITE;
goto out_free;
}
if (store.seen_nr == 0) {
if (!store.seen_alloc) {
/* Did not see key nor section */
ALLOC_GROW(store.seen, 1, store.seen_alloc);
store.seen[0] = store.parsed_nr
- !!store.parsed_nr;
}
store.seen_nr = 1;
}
for (i = 0, copy_begin = 0; i < store.seen_nr; i++) {
size_t replace_end;
int j = store.seen[i];
new_line = 0;
if (!store.key_seen) {
copy_end = store.parsed[j].end;
/* include '\n' when copying section header */
if (copy_end > 0 && copy_end < contents_sz &&
contents[copy_end - 1] != '\n' &&
contents[copy_end] == '\n')
copy_end++;
replace_end = copy_end;
} else {
replace_end = store.parsed[j].end;
copy_end = store.parsed[j].begin;
if (!value)
maybe_remove_section(&store,
&copy_end,
&replace_end, &i);
/*
* Swallow preceding white-space on the same
* line.
*/
while (copy_end > 0 ) {
char c = contents[copy_end - 1];
if (isspace(c) && c != '\n')
copy_end--;
else
break;
}
}
if (copy_end > 0 && contents[copy_end-1] != '\n')
new_line = 1;
/* write the first part of the config */
if (copy_end > copy_begin) {
if (write_in_full(fd, contents + copy_begin,
copy_end - copy_begin) < 0)
goto write_err_out;
if (new_line &&
write_str_in_full(fd, "\n") < 0)
goto write_err_out;
}
copy_begin = replace_end;
}
/* write the pair (value == NULL means unset) */
if (value != NULL) {
if (!store.section_seen) {
if (write_section(fd, key, &store) < 0)
goto write_err_out;
}
if (write_pair(fd, key, value, &store) < 0)
goto write_err_out;
}
/* write the rest of the config */
if (copy_begin < contents_sz)
if (write_in_full(fd, contents + copy_begin,
contents_sz - copy_begin) < 0)
goto write_err_out;
munmap(contents, contents_sz);
contents = NULL;
}
if (commit_lock_file(&lock) < 0) {
error_errno(_("could not write config file %s"), config_filename);
ret = CONFIG_NO_WRITE;
goto out_free;
}
ret = 0;
/* Invalidate the config cache */
git_config_clear();
out_free:
rollback_lock_file(&lock);
free(filename_buf);
if (contents)
munmap(contents, contents_sz);
if (in_fd >= 0)
close(in_fd);
config_store_data_clear(&store);
return ret;
write_err_out:
ret = write_error(get_lock_file_path(&lock));
goto out_free;
}
void git_config_set_multivar_in_file(const char *config_filename,
const char *key, const char *value,
const char *value_pattern, unsigned flags)
{
if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
value_pattern, flags))
return;
if (value)
die(_("could not set '%s' to '%s'"), key, value);
else
die(_("could not unset '%s'"), key);
}
int git_config_set_multivar_gently(const char *key, const char *value,
const char *value_pattern, unsigned flags)
{
return git_config_set_multivar_in_file_gently(NULL, key, value, value_pattern,
flags);
}
void git_config_set_multivar(const char *key, const char *value,
const char *value_pattern, unsigned flags)
{
git_config_set_multivar_in_file(NULL, key, value, value_pattern,
flags);
}
static int section_name_match (const char *buf, const char *name)
{
int i = 0, j = 0, dot = 0;
if (buf[i] != '[')
return 0;
for (i = 1; buf[i] && buf[i] != ']'; i++) {
if (!dot && isspace(buf[i])) {
dot = 1;
if (name[j++] != '.')
break;
for (i++; isspace(buf[i]); i++)
; /* do nothing */
if (buf[i] != '"')
break;
continue;
}
if (buf[i] == '\\' && dot)
i++;
else if (buf[i] == '"' && dot) {
for (i++; isspace(buf[i]); i++)
; /* do_nothing */
break;
}
if (buf[i] != name[j++])
break;
}
if (buf[i] == ']' && name[j] == 0) {
/*
* We match, now just find the right length offset by
* gobbling up any whitespace after it, as well
*/
i++;
for (; buf[i] && isspace(buf[i]); i++)
; /* do nothing */
return i;
}
return 0;
}
static int section_name_is_ok(const char *name)
{
/* Empty section names are bogus. */
if (!*name)
return 0;
/*
* Before a dot, we must be alphanumeric or dash. After the first dot,
* anything goes, so we can stop checking.
*/
for (; *name && *name != '.'; name++)
if (*name != '-' && !isalnum(*name))
return 0;
return 1;
}
/* if new_name == NULL, the section is removed instead */
static int git_config_copy_or_rename_section_in_file(const char *config_filename,
const char *old_name,
const char *new_name, int copy)
{
int ret = 0, remove = 0;
char *filename_buf = NULL;
struct lock_file lock = LOCK_INIT;
int out_fd;
char buf[1024];
FILE *config_file = NULL;
struct stat st;
struct strbuf copystr = STRBUF_INIT;
struct config_store_data store;
memset(&store, 0, sizeof(store));
if (new_name && !section_name_is_ok(new_name)) {
ret = error(_("invalid section name: %s"), new_name);
goto out_no_rollback;
}
if (!config_filename)
config_filename = filename_buf = git_pathdup("config");
out_fd = hold_lock_file_for_update(&lock, config_filename, 0);
if (out_fd < 0) {
ret = error(_("could not lock config file %s"), config_filename);
goto out;
}
if (!(config_file = fopen(config_filename, "rb"))) {
ret = warn_on_fopen_errors(config_filename);
if (ret)
goto out;
/* no config file means nothing to rename, no error */
goto commit_and_out;
}
if (fstat(fileno(config_file), &st) == -1) {
ret = error_errno(_("fstat on %s failed"), config_filename);
goto out;
}
if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
ret = error_errno(_("chmod on %s failed"),
get_lock_file_path(&lock));
goto out;
}
while (fgets(buf, sizeof(buf), config_file)) {
unsigned i;
int length;
int is_section = 0;
char *output = buf;
for (i = 0; buf[i] && isspace(buf[i]); i++)
; /* do nothing */
if (buf[i] == '[') {
/* it's a section */
int offset;
is_section = 1;
/*
* When encountering a new section under -c we
* need to flush out any section we're already
* coping and begin anew. There might be
* multiple [branch "$name"] sections.
*/
if (copystr.len > 0) {
if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
ret = write_error(get_lock_file_path(&lock));
goto out;
}
strbuf_reset(&copystr);
}
offset = section_name_match(&buf[i], old_name);
if (offset > 0) {
ret++;
if (new_name == NULL) {
remove = 1;
continue;
}
store.baselen = strlen(new_name);
if (!copy) {
if (write_section(out_fd, new_name, &store) < 0) {
ret = write_error(get_lock_file_path(&lock));
goto out;
}
/*
* We wrote out the new section, with
* a newline, now skip the old
* section's length
*/
output += offset + i;
if (strlen(output) > 0) {
/*
* More content means there's
* a declaration to put on the
* next line; indent with a
* tab
*/
output -= 1;
output[0] = '\t';
}
} else {
copystr = store_create_section(new_name, &store);
}
}
remove = 0;
}
if (remove)
continue;
length = strlen(output);
if (!is_section && copystr.len > 0) {
strbuf_add(&copystr, output, length);
}
if (write_in_full(out_fd, output, length) < 0) {
ret = write_error(get_lock_file_path(&lock));
goto out;
}
}
/*
* Copy a trailing section at the end of the config, won't be
* flushed by the usual "flush because we have a new section
* logic in the loop above.
*/
if (copystr.len > 0) {
if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
ret = write_error(get_lock_file_path(&lock));
goto out;
}
strbuf_reset(&copystr);
}
fclose(config_file);
config_file = NULL;
commit_and_out:
if (commit_lock_file(&lock) < 0)
ret = error_errno(_("could not write config file %s"),
config_filename);
out:
if (config_file)
fclose(config_file);
rollback_lock_file(&lock);
out_no_rollback:
free(filename_buf);
config_store_data_clear(&store);
return ret;
}
int git_config_rename_section_in_file(const char *config_filename,
const char *old_name, const char *new_name)
{
return git_config_copy_or_rename_section_in_file(config_filename,
old_name, new_name, 0);
}
int git_config_rename_section(const char *old_name, const char *new_name)
{
return git_config_rename_section_in_file(NULL, old_name, new_name);
}
int git_config_copy_section_in_file(const char *config_filename,
const char *old_name, const char *new_name)
{
return git_config_copy_or_rename_section_in_file(config_filename,
old_name, new_name, 1);
}
int git_config_copy_section(const char *old_name, const char *new_name)
{
return git_config_copy_section_in_file(NULL, old_name, new_name);
}
/*
* Call this to report error for your variable that should not
* get a boolean value (i.e. "[my] var" means "true").
*/
#undef config_error_nonbool
int config_error_nonbool(const char *var)
{
return error(_("missing value for '%s'"), var);
}
int parse_config_key(const char *var,
const char *section,
const char **subsection, size_t *subsection_len,
const char **key)
{
const char *dot;
/* Does it start with "section." ? */
if (!skip_prefix(var, section, &var) || *var != '.')
return -1;
/*
* Find the key; we don't know yet if we have a subsection, but we must
* parse backwards from the end, since the subsection may have dots in
* it, too.
*/
dot = strrchr(var, '.');
*key = dot + 1;
/* Did we have a subsection at all? */
if (dot == var) {
if (subsection) {
*subsection = NULL;
*subsection_len = 0;
}
}
else {
if (!subsection)
return -1;
*subsection = var + 1;
*subsection_len = dot - *subsection;
}
return 0;
}
const char *current_config_origin_type(void)
{
int type;
if (current_config_kvi)
type = current_config_kvi->origin_type;
else if(cf)
type = cf->origin_type;
else
BUG("current_config_origin_type called outside config callback");
switch (type) {
case CONFIG_ORIGIN_BLOB:
return "blob";
case CONFIG_ORIGIN_FILE:
return "file";
case CONFIG_ORIGIN_STDIN:
return "standard input";
case CONFIG_ORIGIN_SUBMODULE_BLOB:
return "submodule-blob";
case CONFIG_ORIGIN_CMDLINE:
return "command line";
default:
BUG("unknown config origin type");
}
}
const char *config_scope_name(enum config_scope scope)
{
switch (scope) {
case CONFIG_SCOPE_SYSTEM:
return "system";
case CONFIG_SCOPE_GLOBAL:
return "global";
case CONFIG_SCOPE_LOCAL:
return "local";
case CONFIG_SCOPE_WORKTREE:
return "worktree";
case CONFIG_SCOPE_COMMAND:
return "command";
case CONFIG_SCOPE_SUBMODULE:
return "submodule";
default:
return "unknown";
}
}
const char *current_config_name(void)
{
const char *name;
if (current_config_kvi)
name = current_config_kvi->filename;
else if (cf)
name = cf->name;
else
BUG("current_config_name called outside config callback");
return name ? name : "";
}
enum config_scope current_config_scope(void)
{
if (current_config_kvi)
return current_config_kvi->scope;
else
return current_parsing_scope;
}
int current_config_line(void)
{
if (current_config_kvi)
return current_config_kvi->linenr;
else
return cf->linenr;
}
int lookup_config(const char **mapping, int nr_mapping, const char *var)
{
int i;
for (i = 0; i < nr_mapping; i++) {
const char *name = mapping[i];
if (name && !strcasecmp(var, name))
return i;
}
return -1;
}
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