kakoune/src/main.cc

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#include "assert.hh"
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#include "buffer.hh"
#include "buffer_manager.hh"
#include "buffer_utils.hh"
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#include "client_manager.hh"
#include "command_manager.hh"
#include "commands.hh"
#include "containers.hh"
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#include "context.hh"
#include "event_manager.hh"
#include "face_registry.hh"
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#include "file.hh"
#include "highlighters.hh"
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#include "insert_completer.hh"
#include "shared_string.hh"
#include "ncurses_ui.hh"
#include "parameters_parser.hh"
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#include "register_manager.hh"
#include "remote.hh"
#include "scope.hh"
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#include "shell_manager.hh"
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#include "string.hh"
#include "unit_tests.hh"
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#include "window.hh"
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#include <fcntl.h>
#include <locale>
#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
#include <pwd.h>
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using namespace Kakoune;
String runtime_directory()
{
char relpath[PATH_MAX+1];
format_to(relpath, "{}../share/kak", split_path(get_kak_binary_path()).first);
struct stat st;
if (stat(relpath, &st) == 0 and S_ISDIR(st.st_mode))
return real_path(relpath);
return "/usr/share/kak";
}
void register_env_vars()
{
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static const struct {
const char* name;
bool prefix;
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String (*func)(StringView, const Context&);
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} env_vars[] = { {
"bufname", false,
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[](StringView name, const Context& context) -> String
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{ return context.buffer().display_name(); }
}, {
"buffile", false,
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[](StringView name, const Context& context) -> String
{ return context.buffer().name(); }
}, {
"buflist", false,
[](StringView name, const Context& context)
{ return join(transformed(BufferManager::instance(),
[](const SafePtr<Buffer>& b)
{ return b->display_name(); }), ':'); }
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}, {
"timestamp", false,
[](StringView name, const Context& context) -> String
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{ return to_string(context.buffer().timestamp()); }
}, {
"selection", false,
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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", false,
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[](StringView name, const Context& context)
{ return join(context.selections_content(), ':'); }
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}, {
"runtime", false,
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[](StringView name, const Context& context)
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{ return runtime_directory(); }
}, {
"opt_", true,
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[](StringView name, const Context& context)
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{ return context.options()[name.substr(4_byte)].get_as_string(); }
}, {
"reg_", true,
[](StringView name, const Context& context)
{ return context.main_sel_register_value(name.substr(4_byte)).str(); }
}, {
"client_env_", true,
[](StringView name, const Context& context)
{ return context.client().get_env_var(name.substr(11_byte)).str(); }
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}, {
"session", false,
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[](StringView name, const Context& context) -> String
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{ return Server::instance().session(); }
}, {
"client", false,
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[](StringView name, const Context& context) -> String
{ return context.name(); }
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}, {
"cursor_line", false,
[](StringView name, const Context& context) -> String
{ return to_string(context.selections().main().cursor().line + 1); }
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}, {
"cursor_column", false,
[](StringView name, const Context& context) -> String
{ return to_string(context.selections().main().cursor().column + 1); }
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}, {
"cursor_char_column", false,
[](StringView name, const Context& context) -> String
{ 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", false,
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[](StringView name, const Context& context)
{ return selection_to_string(context.selections().main()); }
}, {
"selections_desc", false,
[](StringView name, const Context& context)
{ return selection_list_to_string(context.selections()); }
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}, {
"window_width", false,
[](StringView name, const Context& context) -> String
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{ return to_string(context.window().dimensions().column); }
}, {
"window_height", false,
[](StringView name, const Context& context) -> String
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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.prefix, env_var.func);
}
void register_registers()
{
RegisterManager& register_manager = RegisterManager::instance();
for (auto c : "abcdefghijklmnopqrstuvwxyz/\"|^@")
register_manager.add_register(c, make_unique<StaticRegister>());
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using StringList = Vector<String, MemoryDomain::Registers>;
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static const struct {
char name;
StringList (*func)(const Context&);
} dyn_regs[] = {
{ '%', [](const Context& context) { return StringList{{context.buffer().display_name()}}; } },
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{ '.', [](const Context& context) {
auto content = context.selections_content();
return StringList{content.begin(), content.end()};
} },
{ '#', [](const Context& context) {
StringList res;
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for (size_t i = 1; i < context.selections().size()+1; ++i)
res.push_back(to_string((int)i));
return res;
} }
};
for (auto& dyn_reg : dyn_regs)
register_manager.add_register(dyn_reg.name, make_unique<DynamicRegister>(dyn_reg.func));
for (size_t i = 0; i < 10; ++i)
{
register_manager.add_register('0'+i, make_unique<DynamicRegister>(
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[i](const Context& context) {
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StringList result;
for (auto& sel : context.selections())
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result.emplace_back(i < sel.captures().size() ? sel.captures()[i] : "");
return result;
}));
}
register_manager.add_register('_', make_unique<NullRegister>());
}
void register_options()
{
OptionsRegistry& reg = GlobalScope::instance().option_registry();
reg.declare_option("tabstop", "size of a tab character", 8);
reg.declare_option("indentwidth", "indentation width", 4);
reg.declare_option("scrolloff",
"number of lines and columns to keep visible main cursor when scrolling",
CharCoord{0,0});
reg.declare_option("eolformat", "end of line format: crlf or lf", EolFormat::Lf);
reg.declare_option("BOM", "insert a byte order mark when writing buffer (none or utf8)",
ByteOrderMark::None);
reg.declare_option("complete_prefix",
"complete up to common prefix in tab completion",
true);
reg.declare_option("incsearch",
"incrementaly apply search/select/split regex",
true);
reg.declare_option("autoinfo",
"automatically display contextual help",
AutoInfo::Command | AutoInfo::OnKey);
reg.declare_option("autoshowcompl",
"automatically display possible completions for prompts",
true);
reg.declare_option("aligntab",
"use tab characters when possible for alignement",
false);
reg.declare_option("ignored_files",
"patterns to ignore when completing filenames",
Regex{R"(^(\..*|.*\.(o|so|a))$)"});
reg.declare_option("disabled_hooks",
"patterns to disable hooks whose group is matched",
Regex{});
reg.declare_option("filetype", "buffer filetype", ""_str);
reg.declare_option("path", "path to consider when trying to find a file",
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Vector<String, MemoryDomain::Options>({ "./", "/usr/include" }));
reg.declare_option("completers", "insert mode completers to execute.",
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InsertCompleterDescList({
InsertCompleterDesc{ InsertCompleterDesc::Filename },
InsertCompleterDesc{ InsertCompleterDesc::Word, "all"_str }
}), OptionFlags::None);
reg.declare_option("static_words", "list of words to always consider for insert word completion",
Vector<String, MemoryDomain::Options>{});
reg.declare_option("autoreload",
"autoreload buffer when a filesystem modification is detected",
Autoreload::Ask);
reg.declare_option("ui_options",
"colon separated list of <key>=<value> options that are "
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"passed to and interpreted by the user interface\n"
"\n"
"The ncurses ui supports the following options:\n"
"<key>: <value>:\n"
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" ncurses_assistant clippy|cat|none|off\n"
" ncurses_status_on_top bool\n"
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" ncurses_set_title bool\n"
" ncurses_enable_mouse bool\n"
" ncurses_wheel_up_button int\n"
" ncurses_wheel_down_button int\n",
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UserInterface::Options{});
reg.declare_option("modelinefmt", "format string used to generate the modeline",
"%val{bufname} %val{cursor_line}:%val{cursor_char_column} "_str);
reg.declare_option("debug", "various debug flags", DebugFlags::None);
}
struct convert_to_client_mode
{
String session;
String buffer_name;
};
static Client* local_client = nullptr;
static bool convert_to_client_pending = false;
pid_t fork_server_to_background()
{
if (pid_t pid = fork())
return pid;
if (fork()) // double fork to orphan the server
exit(0);
write_stderr(format("Kakoune forked server to background ({}), for session '{}'\n",
getpid(), Server::instance().session()));
return 0;
}
std::unique_ptr<UserInterface> create_local_ui(bool dummy_ui)
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{
struct DummyUI : UserInterface
{
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void menu_show(ConstArrayView<DisplayLine>, CharCoord,
Face, Face, MenuStyle) override {}
void menu_select(int) override {}
void menu_hide() override {}
void info_show(StringView, StringView, CharCoord, Face, InfoStyle) override {}
void info_hide() override {}
void draw(const DisplayBuffer&, const Face&) override {}
void draw_status(const DisplayLine&, const DisplayLine&, const Face&) override {}
CharCoord dimensions() override { return {24,80}; }
bool is_key_available() override { return false; }
Key get_key() override { return Key::Invalid; }
void refresh() override {}
void set_input_callback(InputCallback) override {}
void set_ui_options(const Options&) override {}
};
if (dummy_ui)
return make_unique<DummyUI>();
struct LocalUI : NCursesUI
{
LocalUI()
{
m_old_sighup = set_signal_wrapper(SIGHUP, [](int) {
ClientManager::instance().remove_client(*local_client, false);
});
m_old_sigtstp = set_signal_wrapper(SIGTSTP, [](int) {
if (ClientManager::instance().count() == 1 and
*ClientManager::instance().begin() == local_client)
{
// Suspend normally if we are the only client
auto current = set_signal_wrapper(SIGTSTP, static_cast<LocalUI&>(local_client->ui()).m_old_sigtstp);
sigset_t unblock_sigtstp, old_mask;
sigemptyset(&unblock_sigtstp);
sigaddset(&unblock_sigtstp, SIGTSTP);
sigprocmask(SIG_UNBLOCK, &unblock_sigtstp, &old_mask);
raise(SIGTSTP);
sigprocmask(SIG_SETMASK, &old_mask, nullptr);
set_signal_wrapper(SIGTSTP, current);
}
else
convert_to_client_pending = true;
});
}
~LocalUI()
{
set_signal_wrapper(SIGHUP, m_old_sighup);
set_signal_wrapper(SIGTSTP, m_old_sigtstp);
local_client = nullptr;
if (not convert_to_client_pending and
not ClientManager::instance().empty())
{
if (fork_server_to_background())
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{
this->NCursesUI::~NCursesUI();
exit(0);
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}
}
}
private:
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using SigHandler = void (*)(int);
SigHandler m_old_sighup;
SigHandler m_old_sigtstp;
};
if (not isatty(1))
throw runtime_error("stdout is not a tty");
if (not isatty(0))
{
// move stdin to another fd, and restore tty as stdin
int fd = dup(0);
int tty = open("/dev/tty", O_RDONLY);
dup2(tty, 0);
close(tty);
create_fifo_buffer("*stdin*", fd);
}
return make_unique<LocalUI>();
}
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;
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case SIGPIPE: text = "SIGPIPE"; break;
}
if (signal != SIGTERM)
{
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auto msg = format("Received {}, exiting.\nPid: {}\nCallstack:\n{}",
text, getpid(), Backtrace{}.desc());
write_stderr(msg);
notify_fatal_error(msg);
}
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if (Server::has_instance())
Server::instance().close_session();
if (BufferManager::has_instance())
BufferManager::instance().backup_modified_buffers();
if (signal == SIGTERM)
exit(-1);
else
abort();
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}
int run_client(StringView session, StringView init_command)
{
try
{
EventManager event_manager;
RemoteClient client{session, make_unique<NCursesUI>(),
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get_env_vars(), init_command};
while (true)
event_manager.handle_next_events(EventMode::Normal);
}
catch (peer_disconnected&)
{
write_stderr("disconnected from server\n");
return -1;
}
catch (connection_failed& e)
{
write_stderr(format("{}\n", e.what()));
return -1;
}
return 0;
}
int run_server(StringView session, StringView init_command,
bool ignore_kakrc, bool daemon, bool dummy_ui,
ConstArrayView<StringView> files, LineCount target_line)
{
static bool terminate = false;
if (daemon)
{
if (session.empty())
{
write_stderr("-d needs a session name to be specified with -s\n");
return -1;
}
if (pid_t child = fork())
{
write_stderr(format("Kakoune forked to background, for session '{}'\n"
"send SIGTERM to process {} for closing the session\n",
session, child));
exit(0);
}
set_signal_wrapper(SIGTERM, [](int) { terminate = true; });
}
StringRegistry string_registry;
EventManager event_manager;
GlobalScope global_scope;
ShellManager shell_manager;
CommandManager command_manager;
BufferManager buffer_manager;
RegisterManager register_manager;
HighlighterRegistry highlighter_registry;
DefinedHighlighters defined_highlighters;
FaceRegistry face_registry;
ClientManager client_manager;
register_options();
register_env_vars();
register_registers();
register_commands();
register_highlighters();
UnitTest::run_all_tests();
write_to_debug_buffer("*** This is the debug buffer, where debug info will be written ***");
Server server(session.empty() ? to_string(getpid()) : session.str());
bool startup_error = false;
if (not ignore_kakrc) try
{
Context initialisation_context{Context::EmptyContextFlag{}};
command_manager.execute(format("source {}/kakrc", runtime_directory()),
initialisation_context);
}
catch (Kakoune::runtime_error& error)
{
startup_error = true;
write_to_debug_buffer(format("error while parsing kakrc:\n {}", error.what()));
}
catch (Kakoune::client_removed&)
{
startup_error = true;
write_to_debug_buffer("error while parsing kakrc: asked to quit");
}
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{
Context empty_context{Context::EmptyContextFlag{}};
global_scope.hooks().run_hook("KakBegin", "", empty_context);
}
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if (not files.empty()) try
{
// create buffers in reverse order so that the first given buffer
// is the most recently created one.
for (auto& file : reversed(files))
{
try
{
open_or_create_file_buffer(file);
}
catch (Kakoune::runtime_error& error)
{
startup_error = true;
write_to_debug_buffer(format("error while opening file '{}':\n {}",
file, error.what()));
}
}
}
catch (Kakoune::runtime_error& error)
{
write_to_debug_buffer(format("error while opening command line files: {}", error.what()));
}
else
new Buffer("*scratch*", Buffer::Flags::None);
if (not daemon)
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{
local_client = client_manager.create_client(
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create_local_ui(dummy_ui), get_env_vars(), init_command);
if (local_client)
{
auto& selections = local_client->context().selections_write_only();
auto& buffer = selections.buffer();
selections = SelectionList(buffer, buffer.clamp(target_line));
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local_client->context().window().center_line(target_line);
}
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if (startup_error)
local_client->print_status({
"error during startup, see *debug* buffer for details",
get_face("Error")
});
}
try
{
while (not terminate and (not client_manager.empty() or daemon))
{
client_manager.redraw_clients();
event_manager.handle_next_events(EventMode::Normal);
client_manager.handle_pending_inputs();
buffer_manager.clear_buffer_trash();
string_registry.purge_unused();
if (convert_to_client_pending)
{
String buffer_name = local_client->context().buffer().name();
ClientManager::instance().remove_client(*local_client, true);
convert_to_client_pending = false;
if (fork_server_to_background())
{
String session = server.session();
server.close_session(false);
throw convert_to_client_mode{ std::move(session), std::move(buffer_name) };
}
}
}
}
catch (const kill_session&) {}
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{
Context empty_context{Context::EmptyContextFlag{}};
global_scope.hooks().run_hook("KakEnd", "", empty_context);
}
return 0;
}
int run_filter(StringView keystr, StringView commands, ConstArrayView<StringView> files, bool quiet)
{
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StringRegistry string_registry;
GlobalScope global_scope;
EventManager event_manager;
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ShellManager shell_manager;
CommandManager command_manager;
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BufferManager buffer_manager;
RegisterManager register_manager;
ClientManager client_manager;
register_options();
register_env_vars();
register_registers();
register_commands();
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try
{
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auto keys = parse_keys(keystr);
auto apply_to_buffer = [&](Buffer& buffer)
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{
try
{
InputHandler input_handler{
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{ buffer, Selection{{0,0}, buffer.back_coord()} },
Context::Flags::Transient
};
if (not commands.empty())
command_manager.execute(commands, input_handler.context(),
ShellContext{});
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for (auto& key : keys)
input_handler.handle_key(key);
}
catch (Kakoune::runtime_error& err)
{
if (not quiet)
write_stderr(format("error while applying keys to buffer '{}': {}\n",
buffer.display_name(), err.what()));
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}
};
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for (auto& file : files)
{
Buffer* buffer = open_file_buffer(file);
write_buffer_to_file(*buffer, file + ".kak-bak");
apply_to_buffer(*buffer);
write_buffer_to_file(*buffer, file);
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buffer_manager.delete_buffer(*buffer);
}
if (not isatty(0))
{
Buffer* buffer = new Buffer("*stdin*", Buffer::Flags::None,
read_fd(0), InvalidTime);
apply_to_buffer(*buffer);
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write_buffer_to_fd(*buffer, 1);
buffer_manager.delete_buffer(*buffer);
}
}
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catch (Kakoune::runtime_error& err)
{
write_stderr(format("error: {}\n", err.what()));
}
buffer_manager.clear_buffer_trash();
return 0;
}
int run_pipe(StringView session)
{
char buf[512];
String command;
while (ssize_t count = read(0, buf, 512))
{
if (count < 0)
{
write_stderr("error while reading stdin\n");
return -1;
}
command += StringView{buf, buf + count};
}
try
{
send_command(session, command);
}
catch (connection_failed& e)
{
write_stderr(format("{}\n", e.what()));
return -1;
}
return 0;
}
int main(int argc, char* argv[])
{
setlocale(LC_ALL, "");
set_signal_wrapper(SIGSEGV, signal_handler);
set_signal_wrapper(SIGFPE, signal_handler);
set_signal_wrapper(SIGQUIT, signal_handler);
set_signal_wrapper(SIGTERM, signal_handler);
set_signal_wrapper(SIGPIPE, SIG_IGN);
set_signal_wrapper(SIGINT, [](int){});
set_signal_wrapper(SIGCHLD, [](int){});
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Vector<String> params;
for (size_t i = 1; i < argc; ++i)
params.push_back(argv[i]);
const ParameterDesc param_desc{
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SwitchMap{ { "c", { true, "connect to given session" } },
{ "e", { true, "execute argument on initialisation" } },
{ "n", { false, "do not source kakrc files on startup" } },
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{ "s", { true, "set session name" } },
{ "d", { false, "run as a headless session (requires -s)" } },
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{ "p", { true, "just send stdin as commands to the given session" } },
{ "f", { true, "act as a filter, executing given keys on given files" } },
{ "q", { false, "in filter mode, be quiet about errors applying keys" } },
{ "u", { false, "use a dummy user interface, for testing purposes" } },
{ "l", { false, "list existing sessions" } } }
};
try
{
std::sort(keymap.begin(), keymap.end(),
[](const NormalCmdDesc& lhs, const NormalCmdDesc& rhs)
{ return lhs.key < rhs.key; });
ParametersParser parser(params, param_desc);
if (parser.get_switch("l"))
{
for (auto& file : list_files(format("/tmp/kakoune/{}/", getpwuid(geteuid())->pw_name)))
write_stdout(format("{}\n", file));
return 0;
}
if (auto session = parser.get_switch("p"))
{
for (auto opt : { "c", "n", "s", "d", "e" })
{
if (parser.get_switch(opt))
{
write_stderr(format("error: -{} makes not sense with -p\n", opt));
return -1;
}
}
return run_pipe(*session);
}
auto init_command = parser.get_switch("e").value_or(StringView{});
if (auto keys = parser.get_switch("f"))
{
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Vector<StringView> files;
for (size_t i = 0; i < parser.positional_count(); ++i)
files.emplace_back(parser[i]);
return run_filter(*keys, init_command, files, (bool)parser.get_switch("q"));
}
if (auto server_session = parser.get_switch("c"))
{
for (auto opt : { "n", "s", "d" })
{
if (parser.get_switch(opt))
{
write_stderr(format("error: -{} makes not sense with -c\n", opt));
return -1;
}
}
String new_files;
for (auto name : parser)
new_files += format("edit '{}';", escape(real_path(name), "'", '\\'));
return run_client(*server_session, new_files + init_command);
}
else
{
LineCount target_line = 0;
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Vector<StringView> files;
for (auto& name : parser)
{
if (not name.empty() and name[0_byte] == '+')
{
if (auto line = str_to_int_ifp(name.substr(1_byte)))
{
target_line = *line - 1;
continue;
}
}
files.emplace_back(name);
}
StringView session = parser.get_switch("s").value_or(StringView{});
try
{
return run_server(session, init_command,
(bool)parser.get_switch("n"),
(bool)parser.get_switch("d"),
(bool)parser.get_switch("u"),
files, target_line);
}
catch (convert_to_client_mode& convert)
{
raise(SIGTSTP);
return run_client(convert.session,
format("try %^buffer '{}'^; echo converted to client only mode",
escape(convert.buffer_name, "'^", '\\')));
}
}
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}
catch (Kakoune::parameter_error& error)
{
write_stderr(format("Error while parsing parameters: {}\n"
"Valid switches:\n"
"{}", error.what(),
generate_switches_doc(param_desc.switches)));
return -1;
}
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catch (Kakoune::exception& error)
{
on_assert_failed(format("uncaught exception ({}):\n{}", typeid(error).name(), error.what()).c_str());
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return -1;
}
catch (std::exception& error)
{
on_assert_failed(format("uncaught exception ({}):\n{}", typeid(error).name(), 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;
}