kakoune/src/main.cc

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#include "assert.hh"
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#include "buffer.hh"
#include "buffer_manager.hh"
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#include "client_manager.hh"
#include "color_registry.hh"
#include "command_manager.hh"
#include "commands.hh"
#include "context.hh"
#include "debug.hh"
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#include "event_manager.hh"
#include "file.hh"
#include "highlighters.hh"
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#include "hook_manager.hh"
#include "ncurses.hh"
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#include "option_manager.hh"
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#include "keymap_manager.hh"
#include "parameters_parser.hh"
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#include "register_manager.hh"
#include "remote.hh"
#include "shell_manager.hh"
#include "string.hh"
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#include "window.hh"
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#if defined(__APPLE__)
#include <mach-o/dyld.h>
#endif
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#include <unordered_map>
#include <locale>
#include <signal.h>
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using namespace Kakoune;
void run_unit_tests();
String runtime_directory()
{
char buffer[2048];
#if defined(__linux__) || defined(__CYGWIN__)
ssize_t res = readlink("/proc/self/exe", buffer, 2048);
kak_assert(res != -1);
buffer[res] = '\0';
#elif defined(__APPLE__)
uint32_t bufsize = 2048;
_NSGetExecutablePath(buffer, &bufsize);
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char* canonical_path = realpath(buffer, nullptr);
strncpy(buffer, canonical_path, 2048);
free(canonical_path);
#else
# error "finding executable path is not implemented on this platform"
#endif
char* ptr = strrchr(buffer, '/');
if (not ptr)
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throw runtime_error("unable to determine runtime directory");
return String(buffer, ptr) + "/../share/kak";
}
void register_env_vars()
{
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static const struct {
const char* name;
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String (*func)(StringView, const Context&);
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} env_vars[] = { {
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"bufname",
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[](StringView name, const Context& context)
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{ return context.buffer().display_name(); }
}, {
"buffile",
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[](StringView name, const Context& context) -> String
{ return context.buffer().name(); }
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}, {
"timestamp",
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[](StringView name, const Context& context)
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{ return to_string(context.buffer().timestamp()); }
}, {
"selection",
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[](StringView name, const Context& context)
{ const Selection& sel = context.selections().main();
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return content(context.buffer(), sel); }
}, {
"selections",
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[](StringView name, const Context& context)
{ auto sels = context.selections_content();
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String res;
for (size_t i = 0; i < sels.size(); ++i)
{
res += escape(sels[i], ':', '\\');
if (i != sels.size() - 1)
res += ':';
}
return res; }
}, {
"runtime",
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[](StringView name, const Context& context)
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{ return runtime_directory(); }
}, {
"opt_.+",
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[](StringView name, const Context& context)
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{ return context.options()[name.substr(4_byte)].get_as_string(); }
}, {
"reg_.+",
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[](StringView name, const Context& context) -> String
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{ return RegisterManager::instance()[name[4]].values(context)[0]; }
}, {
"client_env_.+",
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[](StringView name, const Context& context) -> String
{ return context.client().get_env_var(name.substr(11_byte)); }
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}, {
"session",
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[](StringView name, const Context& context) -> String
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{ return Server::instance().session(); }
}, {
"client",
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[](StringView name, const Context& context) -> String
{ return context.name(); }
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}, {
"cursor_line",
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[](StringView name, const Context& context)
{ return to_string(context.selections().main().cursor().line + 1); }
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}, {
"cursor_column",
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[](StringView name, const Context& context)
{ return to_string(context.selections().main().cursor().column + 1); }
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}, {
"cursor_char_column",
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[](StringView name, const Context& context)
{ auto coord = context.selections().main().cursor();
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return to_string(context.buffer()[coord.line].char_count_to(coord.column) + 1); }
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}, {
"selection_desc",
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[](StringView name, const Context& context)
{ auto& sel = context.selections().main();
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auto beg = sel.min();
return to_string(beg.line + 1) + ':' + to_string(beg.column + 1) + '+' +
to_string((int)context.buffer().distance(beg, sel.max())+1); }
}, {
"window_width",
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[](StringView name, const Context& context)
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{ return to_string(context.window().dimensions().column); }
}, {
"window_height",
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[](StringView name, const Context& context)
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{ return to_string(context.window().dimensions().line); }
} };
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ShellManager& shell_manager = ShellManager::instance();
for (auto& env_var : env_vars)
shell_manager.register_env_var(env_var.name, env_var.func);
}
void register_registers()
{
using StringList = std::vector<String>;
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static const struct {
char name;
StringList (*func)(const Context&);
} dyn_regs[] = {
{ '%', [](const Context& context) { return StringList{{context.buffer().display_name()}}; } },
{ '.', [](const Context& context) { return context.selections_content(); } },
{ '#', [](const Context& context) { return StringList{{to_string((int)context.selections().size())}}; } },
};
RegisterManager& register_manager = RegisterManager::instance();
for (auto& dyn_reg : dyn_regs)
register_manager.register_dynamic_register(dyn_reg.name, dyn_reg.func);
for (size_t i = 0; i < 10; ++i)
{
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register_manager.register_dynamic_register('0'+i,
[i](const Context& context) {
std::vector<String> result;
for (auto& sel : context.selections())
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result.emplace_back(i < sel.captures().size() ? sel.captures()[i] : "");
return result;
});
}
}
void create_local_client(const String& init_command)
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{
class LocalNCursesUI : public NCursesUI
{
~LocalNCursesUI()
{
if (not ClientManager::instance().empty() and fork())
{
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this->NCursesUI::~NCursesUI();
puts("detached from terminal\n");
exit(0);
}
}
};
UserInterface* ui = new LocalNCursesUI{};
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static Client* client = ClientManager::instance().create_client(
std::unique_ptr<UserInterface>{ui}, get_env_vars(), init_command);
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signal(SIGHUP, [](int) {
if (client)
ClientManager::instance().remove_client(*client);
client = nullptr;
});
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}
void signal_handler(int signal)
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{
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NCursesUI::abort();
const char* text = nullptr;
switch (signal)
{
case SIGSEGV: text = "SIGSEGV"; break;
case SIGFPE: text = "SIGFPE"; break;
case SIGQUIT: text = "SIGQUIT"; break;
case SIGTERM: text = "SIGTERM"; break;
}
on_assert_failed(text);
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if (Server::has_instance())
Server::instance().close_session();
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abort();
}
int run_client(const String& session, const String& init_command)
{
try
{
EventManager event_manager;
auto client = connect_to(session,
std::unique_ptr<UserInterface>{new NCursesUI{}},
get_env_vars(),
init_command);
while (true)
event_manager.handle_next_events();
}
catch (peer_disconnected&)
{
fputs("disconnected from server\n", stderr);
return -1;
}
catch (connection_failed& e)
{
fputs(e.what(), stderr);
return -1;
}
return 0;
}
int kakoune(const ParametersParser& parser)
{
if (parser.has_option("p"))
{
for (auto opt : { "c", "n", "s", "d", "e" })
{
if (parser.has_option(opt))
{
fprintf(stderr, "error: -%s makes not sense with -p\n", opt);
return -1;
}
}
char buf[512];
String command;
while (ssize_t count = read(0, buf, 512))
{
if (count < 0)
{
fprintf(stderr, "error while reading stdin\n");
return -1;
}
command += String{buf, buf + count};
}
try
{
send_command(parser.option_value("p"), command);
}
catch (connection_failed& e)
{
fputs(e.what(), stderr);
return -1;
}
return 0;
}
String init_command;
if (parser.has_option("e"))
init_command = parser.option_value("e");
if (parser.has_option("c"))
{
for (auto opt : { "n", "s", "d" })
{
if (parser.has_option(opt))
{
fprintf(stderr, "error: -%s makes not sense with -c\n", opt);
return -1;
}
}
return run_client(parser.option_value("c"), init_command);
}
const bool daemon = parser.has_option("d");
static bool terminate = false;
if (daemon)
{
if (not parser.has_option("s"))
{
fputs("-d needs a session name to be specified with -s\n", stderr);
return -1;
}
if (pid_t child = fork())
{
printf("Kakoune forked to background, for session '%s'\n"
"send SIGTERM to process %d for closing the session\n",
parser.option_value("s").c_str(), child);
exit(0);
}
signal(SIGTERM, [](int) { terminate = true; });
}
EventManager event_manager;
GlobalOptions global_options;
GlobalHooks global_hooks;
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GlobalKeymaps global_keymaps;
ShellManager shell_manager;
CommandManager command_manager;
BufferManager buffer_manager;
RegisterManager register_manager;
HighlighterRegistry highlighter_registry;
DefinedHighlighters defined_highlighters;
ColorRegistry color_registry;
ClientManager client_manager;
run_unit_tests();
register_env_vars();
register_registers();
register_commands();
register_highlighters();
write_debug("*** This is the debug buffer, where debug info will be written ***");
write_debug("pid: " + to_string(getpid()));
Server server(parser.has_option("s") ? parser.option_value("s") : to_string(getpid()));
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write_debug("session: " + server.session());
if (not parser.has_option("n")) try
{
Context initialisation_context;
command_manager.execute("source " + runtime_directory() + "/kakrc",
initialisation_context);
}
catch (Kakoune::runtime_error& error)
{
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write_debug("error while parsing kakrc: "_str + error.what());
}
catch (Kakoune::client_removed&)
{
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write_debug("error while parsing kakrc: asked to quit");
}
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{
Context empty_context;
global_hooks.run_hook("KakBegin", "", empty_context);
}
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if (parser.positional_count() != 0) try
{
// create buffers in reverse order so that the first given buffer
// is the most recently created one.
for (int i = parser.positional_count() - 1; i >= 0; --i)
{
const String& file = parser[i];
if (not create_buffer_from_file(file))
new Buffer(file, Buffer::Flags::New | Buffer::Flags::File);
}
}
catch (Kakoune::runtime_error& error)
{
write_debug("error while opening command line files: "_str + error.what());
}
else
new Buffer("*scratch*", Buffer::Flags::None);
if (not daemon)
create_local_client(init_command);
while (not terminate and (not client_manager.empty() or daemon))
event_manager.handle_next_events();
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{
Context empty_context;
global_hooks.run_hook("KakEnd", "", empty_context);
}
return 0;
}
int main(int argc, char* argv[])
{
setlocale(LC_ALL, "");
signal(SIGSEGV, signal_handler);
signal(SIGFPE, signal_handler);
signal(SIGQUIT, signal_handler);
signal(SIGTERM, signal_handler);
std::vector<String> params;
for (size_t i = 1; i < argc; ++i)
params.push_back(argv[i]);
const ParameterDesc param_desc{
SwitchMap{ { "c", { true, "connect to given session" } },
{ "e", { true, "execute argument on initialisation" } },
{ "n", { false, "do not source kakrc files on startup" } },
{ "s", { true, "set session name" } },
{ "d", { false, "run as a headless session (requires -s)" } },
{ "p", { true, "just send stdin as commands to the given session" } } }
};
try
{
kakoune(ParametersParser(params, param_desc));
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}
catch (Kakoune::parameter_error& error)
{
printf("Error: %s\n"
"Valid switches:\n"
"%s",
error.what(), generate_switches_doc(param_desc.switches).c_str());
return -1;
}
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catch (Kakoune::exception& error)
{
on_assert_failed(("uncaught exception:\n"_str + error.what()).c_str());
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return -1;
}
catch (std::exception& error)
{
on_assert_failed(("uncaught exception:\n"_str + error.what()).c_str());
return -1;
}
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catch (...)
{
on_assert_failed("uncaught exception");
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return -1;
}
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return 0;
}