/*
* 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 "config.h"
#include "config_backend.h"
#include "config_parse.h"
#include "config_entries.h"
typedef struct {
git_config_backend parent;
git_config_entries *entries;
git_buf cfg;
} config_memory_backend;
typedef struct {
git_config_entries *entries;
git_config_level_t level;
} config_memory_parse_data;
static int config_error_readonly(void)
{
giterr_set(GITERR_CONFIG, "this backend is read-only");
return -1;
}
static int read_variable_cb(
git_config_parser *reader,
const char *current_section,
const char *var_name,
const char *var_value,
const char *line,
size_t line_len,
void *payload)
{
config_memory_parse_data *parse_data = (config_memory_parse_data *) payload;
git_buf buf = GIT_BUF_INIT;
git_config_entry *entry;
const char *c;
int result;
GIT_UNUSED(reader);
GIT_UNUSED(line);
GIT_UNUSED(line_len);
if (current_section) {
/* TODO: Once warnings land, we should likely warn
* here. Git appears to warn in most cases if it sees
* un-namespaced config options.
*/
git_buf_puts(&buf, current_section);
git_buf_putc(&buf, '.');
}
for (c = var_name; *c; c++)
git_buf_putc(&buf, git__tolower(*c));
if (git_buf_oom(&buf))
return -1;
entry = git__calloc(1, sizeof(git_config_entry));
GITERR_CHECK_ALLOC(entry);
entry->name = git_buf_detach(&buf);
entry->value = var_value ? git__strdup(var_value) : NULL;
entry->level = parse_data->level;
entry->include_depth = 0;
if ((result = git_config_entries_append(parse_data->entries, entry)) < 0)
return result;
return result;
}
static int config_memory_open(git_config_backend *backend, git_config_level_t level, const git_repository *repo)
{
config_memory_backend *memory_backend = (config_memory_backend *) backend;
config_memory_parse_data parse_data;
git_config_parser reader;
GIT_UNUSED(repo);
if (memory_backend->cfg.size == 0)
return 0;
git_parse_ctx_init(&reader.ctx, memory_backend->cfg.ptr, memory_backend->cfg.size);
reader.file = NULL;
parse_data.entries = memory_backend->entries;
parse_data.level = level;
return git_config_parse(&reader, NULL, read_variable_cb, NULL, NULL, &parse_data);
}
static int config_memory_get(git_config_backend *backend, const char *key, git_config_entry **out)
{
config_memory_backend *memory_backend = (config_memory_backend *) backend;
return git_config_entries_get(out, memory_backend->entries, key);
}
static int config_memory_iterator(
git_config_iterator **iter,
git_config_backend *backend)
{
config_memory_backend *memory_backend = (config_memory_backend *) backend;
git_config_entries *entries;
int error;
if ((error = git_config_entries_dup(&entries, memory_backend->entries)) < 0)
goto out;
if ((error = git_config_entries_iterator_new(iter, entries)) < 0)
goto out;
out:
/* Let iterator delete duplicated entries when it's done */
git_config_entries_free(entries);
return error;
}
static int config_memory_set(git_config_backend *backend, const char *name, const char *value)
{
GIT_UNUSED(backend);
GIT_UNUSED(name);
GIT_UNUSED(value);
return config_error_readonly();
}
static int config_memory_set_multivar(
git_config_backend *backend, const char *name, const char *regexp, const char *value)
{
GIT_UNUSED(backend);
GIT_UNUSED(name);
GIT_UNUSED(regexp);
GIT_UNUSED(value);
return config_error_readonly();
}
static int config_memory_delete(git_config_backend *backend, const char *name)
{
GIT_UNUSED(backend);
GIT_UNUSED(name);
return config_error_readonly();
}
static int config_memory_delete_multivar(git_config_backend *backend, const char *name, const char *regexp)
{
GIT_UNUSED(backend);
GIT_UNUSED(name);
GIT_UNUSED(regexp);
return config_error_readonly();
}
static int config_memory_lock(git_config_backend *backend)
{
GIT_UNUSED(backend);
return config_error_readonly();
}
static int config_memory_unlock(git_config_backend *backend, int success)
{
GIT_UNUSED(backend);
GIT_UNUSED(success);
return config_error_readonly();
}
static int config_memory_snapshot(git_config_backend **out, git_config_backend *backend)
{
GIT_UNUSED(out);
GIT_UNUSED(backend);
giterr_set(GITERR_CONFIG, "this backend does not support snapshots");
return -1;
}
static void config_memory_free(git_config_backend *_backend)
{
config_memory_backend *backend = (config_memory_backend *)_backend;
if (backend == NULL)
return;
git_config_entries_free(backend->entries);
git_buf_dispose(&backend->cfg);
git__free(backend);
}
int git_config_backend_from_string(git_config_backend **out, const char *cfg, size_t len)
{
config_memory_backend *backend;
backend = git__calloc(1, sizeof(config_memory_backend));
GITERR_CHECK_ALLOC(backend);
if (git_config_entries_new(&backend->entries) < 0) {
git__free(backend);
return -1;
}
if (git_buf_set(&backend->cfg, cfg, len) < 0) {
git_config_entries_free(backend->entries);
git__free(backend);
return -1;
}
backend->parent.version = GIT_CONFIG_BACKEND_VERSION;
backend->parent.readonly = 1;
backend->parent.open = config_memory_open;
backend->parent.get = config_memory_get;
backend->parent.set = config_memory_set;
backend->parent.set_multivar = config_memory_set_multivar;
backend->parent.del = config_memory_delete;
backend->parent.del_multivar = config_memory_delete_multivar;
backend->parent.iterator = config_memory_iterator;
backend->parent.lock = config_memory_lock;
backend->parent.unlock = config_memory_unlock;
backend->parent.snapshot = config_memory_snapshot;
backend->parent.free = config_memory_free;
*out = (git_config_backend *)backend;
return 0;
}
