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|
/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "common.h"
#include "fileops.h"
#include "config.h"
#include "git2/config.h"
#include "git2/sys/config.h"
#include "vector.h"
#include "buf_text.h"
#include "config_file.h"
#if GIT_WIN32
# include <windows.h>
#endif
#include <ctype.h>
typedef struct {
git_refcount rc;
git_config_backend *file;
git_config_level_t level;
} file_internal;
static void file_internal_free(file_internal *internal)
{
git_config_backend *file;
file = internal->file;
file->free(file);
git__free(internal);
}
static void config_free(git_config *cfg)
{
size_t i;
file_internal *internal;
for(i = 0; i < cfg->files.length; ++i){
internal = git_vector_get(&cfg->files, i);
GIT_REFCOUNT_DEC(internal, file_internal_free);
}
git_vector_free(&cfg->files);
git__free(cfg);
}
void git_config_free(git_config *cfg)
{
if (cfg == NULL)
return;
GIT_REFCOUNT_DEC(cfg, config_free);
}
static int config_backend_cmp(const void *a, const void *b)
{
const file_internal *bk_a = (const file_internal *)(a);
const file_internal *bk_b = (const file_internal *)(b);
return bk_b->level - bk_a->level;
}
int git_config_new(git_config **out)
{
git_config *cfg;
cfg = git__malloc(sizeof(git_config));
GITERR_CHECK_ALLOC(cfg);
memset(cfg, 0x0, sizeof(git_config));
if (git_vector_init(&cfg->files, 3, config_backend_cmp) < 0) {
git__free(cfg);
return -1;
}
*out = cfg;
GIT_REFCOUNT_INC(cfg);
return 0;
}
int git_config_add_file_ondisk(
git_config *cfg,
const char *path,
git_config_level_t level,
int force)
{
git_config_backend *file = NULL;
struct stat st;
int res;
assert(cfg && path);
res = p_stat(path, &st);
if (res < 0 && errno != ENOENT) {
giterr_set(GITERR_CONFIG, "Error stat'ing config file '%s'", path);
return -1;
}
if (git_config_file__ondisk(&file, path) < 0)
return -1;
if ((res = git_config_add_backend(cfg, file, level, force)) < 0) {
/*
* free manually; the file is not owned by the config
* instance yet and will not be freed on cleanup
*/
file->free(file);
return res;
}
return 0;
}
int git_config_open_ondisk(git_config **out, const char *path)
{
int error;
git_config *config;
*out = NULL;
if (git_config_new(&config) < 0)
return -1;
if ((error = git_config_add_file_ondisk(config, path, GIT_CONFIG_LEVEL_LOCAL, 0)) < 0)
git_config_free(config);
else
*out = config;
return error;
}
static int find_internal_file_by_level(
file_internal **internal_out,
const git_config *cfg,
git_config_level_t level)
{
int pos = -1;
file_internal *internal;
size_t i;
/* when passing GIT_CONFIG_HIGHEST_LEVEL, the idea is to get the config file
* which has the highest level. As config files are stored in a vector
* sorted by decreasing order of level, getting the file at position 0
* will do the job.
*/
if (level == GIT_CONFIG_HIGHEST_LEVEL) {
pos = 0;
} else {
git_vector_foreach(&cfg->files, i, internal) {
if (internal->level == level)
pos = (int)i;
}
}
if (pos == -1) {
giterr_set(GITERR_CONFIG,
"No config file exists for the given level '%i'", (int)level);
return GIT_ENOTFOUND;
}
*internal_out = git_vector_get(&cfg->files, pos);
return 0;
}
static int duplicate_level(void **old_raw, void *new_raw)
{
file_internal **old = (file_internal **)old_raw;
GIT_UNUSED(new_raw);
giterr_set(GITERR_CONFIG, "A file with the same level (%i) has already been added to the config", (int)(*old)->level);
return GIT_EEXISTS;
}
static void try_remove_existing_file_internal(
git_config *cfg,
git_config_level_t level)
{
int pos = -1;
file_internal *internal;
size_t i;
git_vector_foreach(&cfg->files, i, internal) {
if (internal->level == level)
pos = (int)i;
}
if (pos == -1)
return;
internal = git_vector_get(&cfg->files, pos);
if (git_vector_remove(&cfg->files, pos) < 0)
return;
GIT_REFCOUNT_DEC(internal, file_internal_free);
}
static int git_config__add_internal(
git_config *cfg,
file_internal *internal,
git_config_level_t level,
int force)
{
int result;
/* delete existing config file for level if it exists */
if (force)
try_remove_existing_file_internal(cfg, level);
if ((result = git_vector_insert_sorted(&cfg->files,
internal, &duplicate_level)) < 0)
return result;
git_vector_sort(&cfg->files);
internal->file->cfg = cfg;
GIT_REFCOUNT_INC(internal);
return 0;
}
int git_config_open_global(git_config **cfg_out, git_config *cfg)
{
if (!git_config_open_level(cfg_out, cfg, GIT_CONFIG_LEVEL_XDG))
return 0;
return git_config_open_level(cfg_out, cfg, GIT_CONFIG_LEVEL_GLOBAL);
}
int git_config_open_level(
git_config **cfg_out,
const git_config *cfg_parent,
git_config_level_t level)
{
git_config *cfg;
file_internal *internal;
int res;
if ((res = find_internal_file_by_level(&internal, cfg_parent, level)) < 0)
return res;
if ((res = git_config_new(&cfg)) < 0)
return res;
if ((res = git_config__add_internal(cfg, internal, level, true)) < 0) {
git_config_free(cfg);
return res;
}
*cfg_out = cfg;
return 0;
}
int git_config_add_backend(
git_config *cfg,
git_config_backend *file,
git_config_level_t level,
int force)
{
file_internal *internal;
int result;
assert(cfg && file);
GITERR_CHECK_VERSION(file, GIT_CONFIG_BACKEND_VERSION, "git_config_backend");
if ((result = file->open(file, level)) < 0)
return result;
internal = git__malloc(sizeof(file_internal));
GITERR_CHECK_ALLOC(internal);
memset(internal, 0x0, sizeof(file_internal));
internal->file = file;
internal->level = level;
if ((result = git_config__add_internal(cfg, internal, level, force)) < 0) {
git__free(internal);
return result;
}
return 0;
}
int git_config_refresh(git_config *cfg)
{
int error = 0;
size_t i;
for (i = 0; i < cfg->files.length && !error; ++i) {
file_internal *internal = git_vector_get(&cfg->files, i);
git_config_backend *file = internal->file;
error = file->refresh(file);
}
if (!error && GIT_REFCOUNT_OWNER(cfg) != NULL)
git_repository__cvar_cache_clear(GIT_REFCOUNT_OWNER(cfg));
return error;
}
/*
* Loop over all the variables
*/
int git_config_foreach(
const git_config *cfg, git_config_foreach_cb cb, void *payload)
{
return git_config_foreach_match(cfg, NULL, cb, payload);
}
int git_config_foreach_match(
const git_config *cfg,
const char *regexp,
git_config_foreach_cb cb,
void *payload)
{
int ret = 0;
size_t i;
file_internal *internal;
git_config_backend *file;
for (i = 0; i < cfg->files.length && ret == 0; ++i) {
internal = git_vector_get(&cfg->files, i);
file = internal->file;
ret = file->foreach(file, regexp, cb, payload);
}
return ret;
}
/**************
* Setters
**************/
static int config_error_nofiles(const char *name)
{
giterr_set(GITERR_CONFIG,
"Cannot set value for '%s' when no config files exist", name);
return GIT_ENOTFOUND;
}
int git_config_delete_entry(git_config *cfg, const char *name)
{
git_config_backend *file;
file_internal *internal;
internal = git_vector_get(&cfg->files, 0);
if (!internal || !internal->file)
return config_error_nofiles(name);
file = internal->file;
return file->del(file, name);
}
int git_config_set_int64(git_config *cfg, const char *name, int64_t value)
{
char str_value[32]; /* All numbers should fit in here */
p_snprintf(str_value, sizeof(str_value), "%" PRId64, value);
return git_config_set_string(cfg, name, str_value);
}
int git_config_set_int32(git_config *cfg, const char *name, int32_t value)
{
return git_config_set_int64(cfg, name, (int64_t)value);
}
int git_config_set_bool(git_config *cfg, const char *name, int value)
{
return git_config_set_string(cfg, name, value ? "true" : "false");
}
int git_config_set_string(git_config *cfg, const char *name, const char *value)
{
int error;
git_config_backend *file;
file_internal *internal;
if (!value) {
giterr_set(GITERR_CONFIG, "The value to set cannot be NULL");
return -1;
}
internal = git_vector_get(&cfg->files, 0);
if (!internal || !internal->file)
return config_error_nofiles(name);
file = internal->file;
error = file->set(file, name, value);
if (!error && GIT_REFCOUNT_OWNER(cfg) != NULL)
git_repository__cvar_cache_clear(GIT_REFCOUNT_OWNER(cfg));
return error;
}
/***********
* Getters
***********/
int git_config_get_mapped(
int *out,
const git_config *cfg,
const char *name,
const git_cvar_map *maps,
size_t map_n)
{
const char *value;
int ret;
if ((ret = git_config_get_string(&value, cfg, name)) < 0)
return ret;
return git_config_lookup_map_value(out, maps, map_n, value);
}
int git_config_get_int64(int64_t *out, const git_config *cfg, const char *name)
{
const char *value;
int ret;
if ((ret = git_config_get_string(&value, cfg, name)) < 0)
return ret;
return git_config_parse_int64(out, value);
}
int git_config_get_int32(int32_t *out, const git_config *cfg, const char *name)
{
const char *value;
int ret;
if ((ret = git_config_get_string(&value, cfg, name)) < 0)
return ret;
return git_config_parse_int32(out, value);
}
static int get_string_at_file(const char **out, const git_config_backend *file, const char *name)
{
const git_config_entry *entry;
int res;
res = file->get(file, name, &entry);
if (!res)
*out = entry->value;
return res;
}
static int config_error_notfound(const char *name)
{
giterr_set(GITERR_CONFIG, "Config value '%s' was not found", name);
return GIT_ENOTFOUND;
}
static int get_string(const char **out, const git_config *cfg, const char *name)
{
file_internal *internal;
unsigned int i;
int res;
git_vector_foreach(&cfg->files, i, internal) {
if (!internal || !internal->file)
continue;
res = get_string_at_file(out, internal->file, name);
if (res != GIT_ENOTFOUND)
return res;
}
return config_error_notfound(name);
}
int git_config_get_bool(int *out, const git_config *cfg, const char *name)
{
const char *value = NULL;
int ret;
if ((ret = get_string(&value, cfg, name)) < 0)
return ret;
return git_config_parse_bool(out, value);
}
int git_config_get_string(const char **out, const git_config *cfg, const char *name)
{
int ret;
const char *str = NULL;
if ((ret = get_string(&str, cfg, name)) < 0)
return ret;
*out = str == NULL ? "" : str;
return 0;
}
int git_config_get_entry(const git_config_entry **out, const git_config *cfg, const char *name)
{
file_internal *internal;
unsigned int i;
git_config_backend *file;
int ret;
*out = NULL;
git_vector_foreach(&cfg->files, i, internal) {
if (!internal || !internal->file)
continue;
file = internal->file;
ret = file->get(file, name, out);
if (ret != GIT_ENOTFOUND)
return ret;
}
return config_error_notfound(name);
}
int git_config_get_multivar(
const git_config *cfg, const char *name, const char *regexp,
git_config_foreach_cb cb, void *payload)
{
file_internal *internal;
git_config_backend *file;
int ret = GIT_ENOTFOUND;
size_t i;
/*
* This loop runs the "wrong" way 'round because we need to
* look at every value from the most general to most specific
*/
for (i = cfg->files.length; i > 0; --i) {
internal = git_vector_get(&cfg->files, i - 1);
if (!internal || !internal->file)
continue;
file = internal->file;
ret = file->get_multivar(file, name, regexp, cb, payload);
if (ret < 0 && ret != GIT_ENOTFOUND)
return ret;
}
return (ret == GIT_ENOTFOUND) ? config_error_notfound(name) : 0;
}
int git_config_set_multivar(git_config *cfg, const char *name, const char *regexp, const char *value)
{
git_config_backend *file;
file_internal *internal;
internal = git_vector_get(&cfg->files, 0);
if (!internal || !internal->file)
return config_error_nofiles(name);
file = internal->file;
return file->set_multivar(file, name, regexp, value);
}
static int git_config__find_file_to_path(
char *out, size_t outlen, int (*find)(git_buf *buf))
{
int error = 0;
git_buf path = GIT_BUF_INIT;
if ((error = find(&path)) < 0)
goto done;
if (path.size >= outlen) {
giterr_set(GITERR_NOMEMORY, "Buffer is too short for the path");
error = GIT_EBUFS;
goto done;
}
git_buf_copy_cstr(out, outlen, &path);
done:
git_buf_free(&path);
return error;
}
int git_config_find_global_r(git_buf *path)
{
return git_futils_find_global_file(path, GIT_CONFIG_FILENAME_GLOBAL);
}
int git_config_find_global(char *global_config_path, size_t length)
{
return git_config__find_file_to_path(
global_config_path, length, git_config_find_global_r);
}
int git_config_find_xdg_r(git_buf *path)
{
return git_futils_find_xdg_file(path, GIT_CONFIG_FILENAME_XDG);
}
int git_config_find_xdg(char *xdg_config_path, size_t length)
{
return git_config__find_file_to_path(
xdg_config_path, length, git_config_find_xdg_r);
}
int git_config_find_system_r(git_buf *path)
{
return git_futils_find_system_file(path, GIT_CONFIG_FILENAME_SYSTEM);
}
int git_config_find_system(char *system_config_path, size_t length)
{
return git_config__find_file_to_path(
system_config_path, length, git_config_find_system_r);
}
int git_config__global_location(git_buf *buf)
{
const git_buf *paths;
const char *sep, *start;
size_t len;
if (git_futils_dirs_get(&paths, GIT_FUTILS_DIR_GLOBAL) < 0)
return -1;
/* no paths, so give up */
if (git_buf_len(paths) == 0)
return -1;
start = git_buf_cstr(paths);
sep = strchr(start, GIT_PATH_LIST_SEPARATOR);
if (sep)
len = sep - start;
else
len = paths->size;
if (git_buf_set(buf, start, len) < 0)
return -1;
return git_buf_joinpath(buf, buf->ptr, GIT_CONFIG_FILENAME_GLOBAL);
}
int git_config_open_default(git_config **out)
{
int error;
git_config *cfg = NULL;
git_buf buf = GIT_BUF_INIT;
if ((error = git_config_new(&cfg)) < 0)
return error;
if (!git_config_find_global_r(&buf) || !git_config__global_location(&buf)) {
error = git_config_add_file_ondisk(cfg, buf.ptr,
GIT_CONFIG_LEVEL_GLOBAL, 0);
}
if (!error && !git_config_find_xdg_r(&buf))
error = git_config_add_file_ondisk(cfg, buf.ptr,
GIT_CONFIG_LEVEL_XDG, 0);
if (!error && !git_config_find_system_r(&buf))
error = git_config_add_file_ondisk(cfg, buf.ptr,
GIT_CONFIG_LEVEL_SYSTEM, 0);
git_buf_free(&buf);
if (error) {
git_config_free(cfg);
cfg = NULL;
}
*out = cfg;
return error;
}
/***********
* Parsers
***********/
int git_config_lookup_map_value(
int *out,
const git_cvar_map *maps,
size_t map_n,
const char *value)
{
size_t i;
if (!value)
goto fail_parse;
for (i = 0; i < map_n; ++i) {
const git_cvar_map *m = maps + i;
switch (m->cvar_type) {
case GIT_CVAR_FALSE:
case GIT_CVAR_TRUE: {
int bool_val;
if (git__parse_bool(&bool_val, value) == 0 &&
bool_val == (int)m->cvar_type) {
*out = m->map_value;
return 0;
}
break;
}
case GIT_CVAR_INT32:
if (git_config_parse_int32(out, value) == 0)
return 0;
break;
case GIT_CVAR_STRING:
if (strcasecmp(value, m->str_match) == 0) {
*out = m->map_value;
return 0;
}
break;
}
}
fail_parse:
giterr_set(GITERR_CONFIG, "Failed to map '%s'", value);
return -1;
}
int git_config_parse_bool(int *out, const char *value)
{
if (git__parse_bool(out, value) == 0)
return 0;
if (git_config_parse_int32(out, value) == 0) {
*out = !!(*out);
return 0;
}
giterr_set(GITERR_CONFIG, "Failed to parse '%s' as a boolean value", value);
return -1;
}
int git_config_parse_int64(int64_t *out, const char *value)
{
const char *num_end;
int64_t num;
if (git__strtol64(&num, value, &num_end, 0) < 0)
goto fail_parse;
switch (*num_end) {
case 'g':
case 'G':
num *= 1024;
/* fallthrough */
case 'm':
case 'M':
num *= 1024;
/* fallthrough */
case 'k':
case 'K':
num *= 1024;
/* check that that there are no more characters after the
* given modifier suffix */
if (num_end[1] != '\0')
return -1;
/* fallthrough */
case '\0':
*out = num;
return 0;
default:
goto fail_parse;
}
fail_parse:
giterr_set(GITERR_CONFIG, "Failed to parse '%s' as an integer", value);
return -1;
}
int git_config_parse_int32(int32_t *out, const char *value)
{
int64_t tmp;
int32_t truncate;
if (git_config_parse_int64(&tmp, value) < 0)
goto fail_parse;
truncate = tmp & 0xFFFFFFFF;
if (truncate != tmp)
goto fail_parse;
*out = truncate;
return 0;
fail_parse:
giterr_set(GITERR_CONFIG, "Failed to parse '%s' as a 32-bit integer", value);
return -1;
}
struct rename_data {
git_config *config;
git_buf *name;
size_t old_len;
int actual_error;
};
static int rename_config_entries_cb(
const git_config_entry *entry,
void *payload)
{
int error = 0;
struct rename_data *data = (struct rename_data *)payload;
size_t base_len = git_buf_len(data->name);
if (base_len > 0 &&
!(error = git_buf_puts(data->name, entry->name + data->old_len)))
{
error = git_config_set_string(
data->config, git_buf_cstr(data->name), entry->value);
git_buf_truncate(data->name, base_len);
}
if (!error)
error = git_config_delete_entry(data->config, entry->name);
data->actual_error = error; /* preserve actual error code */
return error;
}
int git_config_rename_section(
git_repository *repo,
const char *old_section_name,
const char *new_section_name)
{
git_config *config;
git_buf pattern = GIT_BUF_INIT, replace = GIT_BUF_INIT;
int error = 0;
struct rename_data data;
git_buf_text_puts_escape_regex(&pattern, old_section_name);
if ((error = git_buf_puts(&pattern, "\\..+")) < 0)
goto cleanup;
if ((error = git_repository_config__weakptr(&config, repo)) < 0)
goto cleanup;
data.config = config;
data.name = &replace;
data.old_len = strlen(old_section_name) + 1;
data.actual_error = 0;
if ((error = git_buf_join(&replace, '.', new_section_name, "")) < 0)
goto cleanup;
if (new_section_name != NULL &&
(error = git_config_file_normalize_section(
replace.ptr, strchr(replace.ptr, '.'))) < 0)
{
giterr_set(
GITERR_CONFIG, "Invalid config section '%s'", new_section_name);
goto cleanup;
}
error = git_config_foreach_match(
config, git_buf_cstr(&pattern), rename_config_entries_cb, &data);
if (error == GIT_EUSER)
error = data.actual_error;
cleanup:
git_buf_free(&pattern);
git_buf_free(&replace);
return error;
}
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