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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.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)

{

git_error_set(GIT_ERROR_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));

GIT_ERROR_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;

git_config_parser parser = GIT_PARSE_CTX_INIT;

config_memory_parse_data parse_data;

int error;

GIT_UNUSED(repo);

if ((error = git_config_parser_init(&parser, "in-memory", memory_backend->cfg.ptr,

memory_backend->cfg.size)) < 0)

goto out;

parse_data.entries = memory_backend->entries;

parse_data.level = level;

if ((error = git_config_parse(&parser, NULL, read_variable_cb, NULL, NULL, &parse_data)) < 0)

goto out;

out:

git_config_parser_dispose(&parser);

return error;

}

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);

git_error_set(GIT_ERROR_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));

GIT_ERROR_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;

}