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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 "config_backend.h"
#include "config.h"
#include "config_entries.h"
typedef struct {
git_config_backend parent;
git_mutex values_mutex;
git_config_entries *entries;
git_config_backend *source;
} config_snapshot_backend;
static int config_error_readonly(void)
{
git_error_set(GIT_ERROR_CONFIG, "this backend is read-only");
return -1;
}
static int config_snapshot_iterator(
git_config_iterator **iter,
struct git_config_backend *backend)
{
config_snapshot_backend *b = GIT_CONTAINER_OF(backend, config_snapshot_backend, parent);
git_config_entries *entries = NULL;
int error;
if ((error = git_config_entries_dup(&entries, b->entries)) < 0 ||
(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;
}
/* release the map containing the entry as an equivalent to freeing it */
static void config_snapshot_entry_free(git_config_entry *entry)
{
git_config_entries *entries = (git_config_entries *) entry->payload;
git_config_entries_free(entries);
}
static int config_snapshot_get(git_config_backend *cfg, const char *key, git_config_entry **out)
{
config_snapshot_backend *b = GIT_CONTAINER_OF(cfg, config_snapshot_backend, parent);
git_config_entries *entries = NULL;
git_config_entry *entry;
int error = 0;
if (git_mutex_lock(&b->values_mutex) < 0) {
git_error_set(GIT_ERROR_OS, "failed to lock config backend");
return -1;
}
entries = b->entries;
git_config_entries_incref(entries);
git_mutex_unlock(&b->values_mutex);
if ((error = (git_config_entries_get(&entry, entries, key))) < 0) {
git_config_entries_free(entries);
return error;
}
entry->free = config_snapshot_entry_free;
entry->payload = entries;
*out = entry;
return 0;
}
static int config_snapshot_set(git_config_backend *cfg, const char *name, const char *value)
{
GIT_UNUSED(cfg);
GIT_UNUSED(name);
GIT_UNUSED(value);
return config_error_readonly();
}
static int config_snapshot_set_multivar(
git_config_backend *cfg, const char *name, const char *regexp, const char *value)
{
GIT_UNUSED(cfg);
GIT_UNUSED(name);
GIT_UNUSED(regexp);
GIT_UNUSED(value);
return config_error_readonly();
}
static int config_snapshot_delete_multivar(git_config_backend *cfg, const char *name, const char *regexp)
{
GIT_UNUSED(cfg);
GIT_UNUSED(name);
GIT_UNUSED(regexp);
return config_error_readonly();
}
static int config_snapshot_delete(git_config_backend *cfg, const char *name)
{
GIT_UNUSED(cfg);
GIT_UNUSED(name);
return config_error_readonly();
}
static int config_snapshot_lock(git_config_backend *_cfg)
{
GIT_UNUSED(_cfg);
return config_error_readonly();
}
static int config_snapshot_unlock(git_config_backend *_cfg, int success)
{
GIT_UNUSED(_cfg);
GIT_UNUSED(success);
return config_error_readonly();
}
static void config_snapshot_free(git_config_backend *_backend)
{
config_snapshot_backend *backend = GIT_CONTAINER_OF(_backend, config_snapshot_backend, parent);
if (backend == NULL)
return;
git_config_entries_free(backend->entries);
git_mutex_free(&backend->values_mutex);
git__free(backend);
}
static int config_snapshot_open(git_config_backend *cfg, git_config_level_t level, const git_repository *repo)
{
config_snapshot_backend *b = GIT_CONTAINER_OF(cfg, config_snapshot_backend, parent);
git_config_entries *entries = NULL;
git_config_iterator *it = NULL;
git_config_entry *entry;
int error;
/* We're just copying data, don't care about the level or repo*/
GIT_UNUSED(level);
GIT_UNUSED(repo);
if ((error = git_config_entries_new(&entries)) < 0 ||
(error = b->source->iterator(&it, b->source)) < 0)
goto out;
while ((error = git_config_next(&entry, it)) == 0)
if ((error = git_config_entries_dup_entry(entries, entry)) < 0)
goto out;
if (error < 0) {
if (error != GIT_ITEROVER)
goto out;
error = 0;
}
b->entries = entries;
out:
git_config_iterator_free(it);
if (error)
git_config_entries_free(entries);
return error;
}
int git_config_backend_snapshot(git_config_backend **out, git_config_backend *source)
{
config_snapshot_backend *backend;
backend = git__calloc(1, sizeof(config_snapshot_backend));
GIT_ERROR_CHECK_ALLOC(backend);
backend->parent.version = GIT_CONFIG_BACKEND_VERSION;
git_mutex_init(&backend->values_mutex);
backend->source = source;
backend->parent.readonly = 1;
backend->parent.version = GIT_CONFIG_BACKEND_VERSION;
backend->parent.open = config_snapshot_open;
backend->parent.get = config_snapshot_get;
backend->parent.set = config_snapshot_set;
backend->parent.set_multivar = config_snapshot_set_multivar;
backend->parent.snapshot = git_config_backend_snapshot;
backend->parent.del = config_snapshot_delete;
backend->parent.del_multivar = config_snapshot_delete_multivar;
backend->parent.iterator = config_snapshot_iterator;
backend->parent.lock = config_snapshot_lock;
backend->parent.unlock = config_snapshot_unlock;
backend->parent.free = config_snapshot_free;
*out = &backend->parent;
return 0;
}
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