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#include <stdint.h>
#include <inttypes.h>
#include <stdbool.h>
#include <assert.h>
#include "nvim/os/provider.h"
#include "nvim/memory.h"
#include "nvim/api/vim.h"
#include "nvim/api/private/helpers.h"
#include "nvim/api/private/defs.h"
#include "nvim/os/channel.h"
#include "nvim/os/shell.h"
#include "nvim/os/os.h"
#include "nvim/log.h"
#include "nvim/map.h"
#include "nvim/message.h"
#include "nvim/os/msgpack_rpc_helpers.h"
#define FEATURE_COUNT (sizeof(features) / sizeof(features[0]))
#define FEATURE(feature_name, provider_bootstrap_command, ...) { \
.name = feature_name, \
.bootstrap_command = provider_bootstrap_command, \
.argv = NULL, \
.channel_id = 0, \
.methods = (char *[]){__VA_ARGS__, NULL} \
}
static struct feature {
char *name, **bootstrap_command, **argv, **methods;
size_t name_length;
uint64_t channel_id;
} features[] = {
FEATURE("python",
&p_ipy,
"python_execute",
"python_execute_file",
"python_do_range",
"python_eval"),
FEATURE("clipboard",
&p_icpb,
"clipboard_get",
"clipboard_set")
};
static Map(cstr_t, uint64_t) *registered_providers = NULL;
#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "os/provider.c.generated.h"
#endif
void provider_init(void)
{
registered_providers = map_new(cstr_t, uint64_t)();
}
bool provider_has_feature(char *name)
{
for (size_t i = 0; i < FEATURE_COUNT; i++) {
struct feature *f = &features[i];
if (!STRICMP(name, f->name)) {
return f->channel_id || can_execute(f);
}
}
return false;
}
bool provider_available(char *method)
{
return map_has(cstr_t, uint64_t)(registered_providers, method);
}
bool provider_register(char *method, uint64_t channel_id)
{
if (map_has(cstr_t, uint64_t)(registered_providers, method)) {
return false;
}
// First check if this method is part of a feature, and if so, update
// the feature structure with the channel id
struct feature *f = get_feature_for(method);
if (f) {
DLOG("Registering provider for \"%s\" "
"which is part of the \"%s\" feature",
method,
f->name);
f->channel_id = channel_id;
}
map_put(cstr_t, uint64_t)(registered_providers, xstrdup(method), channel_id);
ILOG("Registered channel %" PRIu64 " as the provider for \"%s\"",
channel_id,
method);
return true;
}
Object provider_call(char *method, Object arg)
{
uint64_t channel_id = get_provider_for(method);
if (!channel_id) {
char buf[256];
snprintf(buf,
sizeof(buf),
"Provider for \"%s\" is not available",
method);
report_error(buf);
msgpack_rpc_free_object(arg);
return NIL;
}
bool error = false;
Object result = NIL;
channel_send_call(channel_id, method, arg, &result, &error);
if (error) {
report_error(result.data.string.data);
msgpack_rpc_free_object(result);
return NIL;
}
return result;
}
static uint64_t get_provider_for(char *method)
{
uint64_t channel_id = map_get(cstr_t, uint64_t)(registered_providers, method);
if (channel_id) {
return channel_id;
}
// Try to bootstrap if the method is part of a feature
struct feature *f = get_feature_for(method);
if (!f || !can_execute(f)) {
ELOG("Cannot bootstrap provider for \"%s\"", method);
goto err;
}
if (f->channel_id) {
ELOG("Already bootstrapped provider for \"%s\"", f->name);
goto err;
}
f->channel_id = channel_from_job(f->argv);
if (!f->channel_id) {
ELOG("The provider for \"%s\" failed to bootstrap", f->name);
goto err;
}
return f->channel_id;
err:
// Ensure we won't try to restart the provider
if (f) {
f->bootstrap_command = NULL;
f->channel_id = 0;
}
return 0;
}
static bool can_execute(struct feature *f)
{
if (!f->bootstrap_command) {
return false;
}
char *cmd = *f->bootstrap_command;
if (!cmd || !strlen(cmd)) {
return false;
}
if (!f->argv) {
f->argv = shell_build_argv((uint8_t *)cmd, NULL);
}
return os_can_exe((uint8_t *)f->argv[0]);
}
static void report_error(char *str)
{
vim_err_write((String) {.data = str, .size = strlen(str)});
vim_err_write((String) {.data = "\n", .size = 1});
}
static bool feature_has_method(struct feature *f, char *method)
{
size_t i;
char *m;
for (m = f->methods[i = 0]; m; m = f->methods[++i]) {
if (!STRCMP(method, m)) {
return true;
}
}
return false;
}
static struct feature *get_feature_for(char *method)
{
for (size_t i = 0; i < FEATURE_COUNT; i++) {
struct feature *f = &features[i];
if (feature_has_method(f, method)) {
return f;
}
}
return NULL;
}
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