kakoune/src/main.cc

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#include "assert.hh"
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#include "backtrace.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 "json_ui.hh"
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#include "ncurses_ui.hh"
#include "option_types.hh"
#include "parameters_parser.hh"
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#include "regex.hh"
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#include "register_manager.hh"
#include "remote.hh"
#include "scope.hh"
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#include "shared_string.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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namespace Kakoune
{
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static const char* startup_info =
"Kakoune recent breaking changes:\n"
" * Renamed range-faces/line-flags option types to range-specs/line-specs\n"
" range-specs can be used by the new replace-range highlighter.\n"
" A new update-option command can be used to update the line/ranges\n"
" according to buffer modification\n"
" * <a-z> and <a-Z> are not append to/from register anymore but\n"
" combine from/to register.\n"
" * `*` will now strip surrounding whitespaces from the selection\n"
" * lint/grep/make next/prev commands have been renamed to more\n"
" explicit names (lint-next-error, grep-previous-match, ...)\n"
" * ctags commands have been renamed to use the ctags- prefix\n"
" * completion_extra_word_char option is now extra_word_chars (note the plural form)\n"
" and is used for word selection commands\n";
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struct startup_error : runtime_error
{
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using runtime_error::runtime_error;
};
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inline void write_stdout(StringView str) { write(1, str); }
inline void write_stderr(StringView str) { write(2, str); }
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(BufferManager::instance() |
transform(std::mem_fn(&Buffer::display_name)), ':'); }
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}, {
"buf_line_count", false,
[](StringView name, const Context& context) -> String
{ return to_string(context.buffer().line_count()); }
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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(); }
}, {
"modified", false,
[](StringView name, const Context& context) -> String
{ return context.buffer().is_modified() ? "true" : "false"; }
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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); }
}, {
"cursor_byte_offset", false,
[](StringView name, const Context& context) -> String
{ auto cursor = context.selections().main().cursor();
return to_string(context.buffer().distance({0,0}, cursor)); }
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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>;
register_manager.add_register('%', make_dyn_reg(
[](const Context& context)
{ return StringList{{context.buffer().display_name()}}; }));
register_manager.add_register('.', make_dyn_reg(
[](const Context& context) {
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auto content = context.selections_content();
return StringList{content.begin(), content.end()};
}));
register_manager.add_register('#', make_dyn_reg(
[](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 (size_t i = 0; i < 10; ++i)
{
register_manager.add_register('0'+i, make_dyn_reg(
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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;
},
[i](Context& context, ConstArrayView<String> values) {
if (values.empty())
return;
auto& sels = context.selections();
for (size_t sel_index = 0; sel_index < sels.size(); ++sel_index)
{
auto& sel = sels[sel_index];
if (sel.captures().size() < i+1)
sel.captures().resize(i+1);
sel.captures()[i] = values[std::min(sel_index, values.size()-1)];
}
}));
}
register_manager.add_register('_', make_unique<NullRegister>());
}
static void check_tabstop(const int& val)
{
if (val < 1) throw runtime_error{"tabstop should be strictly positive"};
}
static void check_indentwidth(const int& val)
{
if (val < 0) throw runtime_error{"indentwidth should be positive or zero"};
}
static void check_scrolloff(const DisplayCoord& so)
{
if (so.line < 0 or so.column < 0)
throw runtime_error{"scroll offset must be positive or zero"};
}
static void check_timeout(const int& timeout)
{
if (timeout < 50)
throw runtime_error{"the minimum acceptable timeout is 50 milliseconds"};
}
static void check_extra_word_chars(const Vector<Codepoint, MemoryDomain::Options>& extra_chars)
{
if (contains_that(extra_chars, is_blank))
throw runtime_error{"blanks are not accepted for extra completion characters"};
}
void register_options()
{
OptionsRegistry& reg = GlobalScope::instance().option_registry();
reg.declare_option<int, check_tabstop>("tabstop", "size of a tab character", 8);
reg.declare_option<int, check_indentwidth>("indentwidth", "indentation width", 4);
reg.declare_option<DisplayCoord, check_scrolloff>(
"scrolloff", "number of lines and columns to keep visible main cursor when scrolling",
{0,0});
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reg.declare_option("eolformat", "end of line format", EolFormat::Lf);
reg.declare_option("BOM", "byte order mark to use when writing buffer",
ByteOrderMark::None);
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<int, check_timeout>(
"idle_timeout", "timeout, in milliseconds, before idle hooks are triggered", 50);
reg.declare_option<int, check_timeout>(
"fs_check_timeout", "timeout, in milliseconds, between file system buffer modification checks",
500);
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|dilbert|none|off\n"
" ncurses_status_on_top bool\n"
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" ncurses_set_title bool\n"
" ncurses_enable_mouse bool\n"
" ncurses_change_colors 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} {{context_info}} {{mode_info}} - %val{client}@[%val{session}]"_str);
reg.declare_option("debug", "various debug flags", DebugFlags::None);
reg.declare_option("readonly", "prevent buffers from being modified", false);
reg.declare_option<Vector<Codepoint, MemoryDomain::Options>, check_extra_word_chars>(
"extra_word_chars",
"Additional characters to be considered as words for insert completion",
{});
}
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static Client* local_client = nullptr;
static UserInterface* local_ui = nullptr;
static bool convert_to_client_pending = false;
enum class UIType
{
NCurses,
Json,
Dummy,
};
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UIType parse_ui_type(StringView ui_name)
{
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if (ui_name == "ncurses") return UIType::NCurses;
if (ui_name == "json") return UIType::Json;
if (ui_name == "dummy") return UIType::Dummy;
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throw parameter_error(format("error: unknown ui type: '{}'", ui_name));
}
std::unique_ptr<UserInterface> make_ui(UIType ui_type)
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{
struct DummyUI : UserInterface
{
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DummyUI() { set_signal_handler(SIGINT, SIG_DFL); }
void menu_show(ConstArrayView<DisplayLine>, DisplayCoord,
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Face, Face, MenuStyle) override {}
void menu_select(int) override {}
void menu_hide() override {}
void info_show(StringView, StringView, DisplayCoord, Face, InfoStyle) override {}
void info_hide() override {}
void draw(const DisplayBuffer&, const Face&, const Face&) override {}
void draw_status(const DisplayLine&, const DisplayLine&, const Face&) override {}
DisplayCoord dimensions() override { return {24,80}; }
void set_cursor(CursorMode, DisplayCoord) override {}
void refresh(bool) override {}
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void set_on_key(OnKeyCallback) override {}
void set_ui_options(const Options&) override {}
};
switch (ui_type)
{
case UIType::NCurses: return make_unique<NCursesUI>();
case UIType::Json: return make_unique<JsonUI>();
case UIType::Dummy: return make_unique<DummyUI>();
}
throw logic_error{};
}
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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(UIType ui_type)
{
if (ui_type != UIType::NCurses)
return make_ui(ui_type);
struct LocalUI : NCursesUI
{
LocalUI()
{
kak_assert(not local_ui);
local_ui = this;
m_old_sighup = set_signal_handler(SIGHUP, [](int) {
ClientManager::instance().remove_client(*local_client, false);
static_cast<LocalUI*>(local_ui)->on_sighup();
});
m_old_sigtstp = set_signal_handler(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_handler(SIGTSTP, static_cast<LocalUI*>(local_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);
set_signal_handler(SIGTSTP, current);
sigprocmask(SIG_SETMASK, &old_mask, nullptr);
}
else
convert_to_client_pending = true;
});
}
~LocalUI() override
{
set_signal_handler(SIGHUP, m_old_sighup);
set_signal_handler(SIGTSTP, m_old_sigtstp);
local_client = nullptr;
local_ui = 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 startup_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, Buffer::Flags::None);
}
return make_unique<LocalUI>();
}
int run_client(StringView session, StringView client_init,
Optional<BufferCoord> init_coord, UIType ui_type)
{
try
{
EventManager event_manager;
RemoteClient client{session, make_ui(ui_type), get_env_vars(), client_init, std::move(init_coord)};
while (true)
event_manager.handle_next_events(EventMode::Normal);
}
catch (disconnected& e)
{
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if (!e.m_graceful)
write_stderr(format("{}\ndisconnecting\n", e.what()));
return e.m_graceful ? 0 : -1;
}
return 0;
}
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struct convert_to_client_mode
{
String session;
String buffer_name;
String selections;
};
enum class ServerFlags
{
None = 0,
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IgnoreKakrc = 1 << 0,
Daemon = 1 << 1,
ReadOnly = 1 << 2,
StartupInfo = 1 << 3,
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};
constexpr bool with_bit_ops(Meta::Type<ServerFlags>) { return true; }
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int run_server(StringView session, StringView server_init,
StringView client_init, Optional<BufferCoord> init_coord,
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ServerFlags flags, UIType ui_type,
ConstArrayView<StringView> files)
{
static bool terminate = false;
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if (flags & ServerFlags::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_handler(SIGTERM, [](int) { terminate = true; });
}
StringRegistry string_registry;
EventManager event_manager;
GlobalScope global_scope;
ShellManager shell_manager;
CommandManager command_manager;
RegisterManager register_manager;
HighlighterRegistry highlighter_registry;
DefinedHighlighters defined_highlighters;
FaceRegistry face_registry;
ClientManager client_manager;
BufferManager buffer_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 ***");
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GlobalScope::instance().options().get_local_option("readonly").set<bool>(flags & ServerFlags::ReadOnly);
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Server server{session.empty() ? to_string(getpid()) : session.str()};
bool startup_error = false;
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if (not (flags & ServerFlags::IgnoreKakrc)) try
{
Context init_context{Context::EmptyContextFlag{}};
command_manager.execute(format("source {}/kakrc", runtime_directory()),
init_context);
}
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catch (runtime_error& error)
{
startup_error = true;
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write_to_debug_buffer(format("error while parsing kakrc:\n"
" {}", error.what()));
}
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if (not server_init.empty()) try
{
Context init_context{Context::EmptyContextFlag{}};
command_manager.execute(server_init, init_context);
}
catch (runtime_error& error)
{
startup_error = true;
write_to_debug_buffer(format("error while running server init commands:\n"
" {}", error.what()));
}
{
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 : files | reverse())
{
try
{
Buffer *buffer = open_or_create_file_buffer(file);
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if (flags & ServerFlags::ReadOnly)
buffer->flags() |= Buffer::Flags::ReadOnly;
}
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catch (runtime_error& error)
{
startup_error = true;
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write_to_debug_buffer(format("error while opening file '{}':\n"
" {}", file, error.what()));
}
}
}
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catch (runtime_error& error)
{
write_to_debug_buffer(format("error while opening command line files: {}", error.what()));
}
try
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{
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if (not (flags & ServerFlags::Daemon))
{
local_client = client_manager.create_client(
create_local_ui(ui_type), get_env_vars(), client_init, std::move(init_coord));
if (startup_error)
local_client->print_status({
"error during startup, see *debug* buffer for details",
get_face("Error")
});
if (flags & ServerFlags::StartupInfo)
local_client->info_show("Welcome to Kakoune", startup_info, {}, InfoStyle::Prompt);
}
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while (not terminate and (not client_manager.empty() or (flags & ServerFlags::Daemon)))
{
client_manager.redraw_clients();
event_manager.handle_next_events(EventMode::Normal);
client_manager.process_pending_inputs();
client_manager.clear_client_trash();
client_manager.clear_window_trash();
buffer_manager.clear_buffer_trash();
if (convert_to_client_pending)
{
String buffer_name = local_client->context().buffer().name();
String selections = selection_list_to_string(local_client->context().selections());
ClientManager::instance().remove_client(*local_client, true);
client_manager.clear_client_trash();
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), std::move(selections) };
}
}
}
}
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, StringView suffix_backup)
{
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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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RegisterManager register_manager;
ClientManager client_manager;
BufferManager buffer_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);
}
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catch (runtime_error& err)
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{
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);
if (not suffix_backup.empty())
write_buffer_to_file(*buffer, buffer->name() + suffix_backup);
apply_to_buffer(*buffer);
write_buffer_to_file(*buffer, buffer->name());
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buffer_manager.delete_buffer(*buffer);
}
if (not isatty(0))
{
Buffer& buffer = *buffer_manager.create_buffer(
"*stdin*", Buffer::Flags::None, read_fd(0), InvalidTime);
apply_to_buffer(buffer);
write_buffer_to_fd(buffer, 1);
buffer_manager.delete_buffer(buffer);
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}
}
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catch (runtime_error& err)
{
write_stderr(format("error: {}\n", err.what()));
}
buffer_manager.clear_buffer_trash();
return 0;
}
int run_pipe(StringView session)
{
try
{
send_command(session, read_fd(0));
}
catch (disconnected& e)
{
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write_stderr(format("{}\ndisconnecting\n", e.what()));
return e.m_graceful ? 0 : -1;
}
return 0;
}
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void signal_handler(int signal)
{
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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;
case SIGPIPE: text = "SIGPIPE"; break;
}
if (signal != SIGTERM)
{
auto msg = format("Received {}, exiting.\nPid: {}\nCallstack:\n{}",
text, getpid(), Backtrace{}.desc());
write_stderr(msg);
notify_fatal_error(msg);
}
if (Server::has_instance())
Server::instance().close_session();
if (BufferManager::has_instance())
BufferManager::instance().backup_modified_buffers();
if (signal == SIGTERM)
exit(-1);
else
abort();
}
}
int main(int argc, char* argv[])
{
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using namespace Kakoune;
setlocale(LC_ALL, "");
set_signal_handler(SIGSEGV, signal_handler);
set_signal_handler(SIGFPE, signal_handler);
set_signal_handler(SIGQUIT, signal_handler);
set_signal_handler(SIGTERM, signal_handler);
set_signal_handler(SIGPIPE, SIG_IGN);
set_signal_handler(SIGINT, [](int){});
set_signal_handler(SIGCHLD, [](int){});
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Vector<String> params;
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for (int i = 1; i < argc; ++i)
params.emplace_back(argv[i]);
const ParameterDesc param_desc{
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SwitchMap{ { "c", { true, "connect to given session" } },
{ "e", { true, "execute argument on client initialisation" } },
{ "E", { true, "execute argument on server 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" } },
{ "i", { true, "backup the files on which a filter is applied using the given suffix" } },
{ "q", { false, "in filter mode, be quiet about errors applying keys" } },
{ "ui", { true, "set the type of user interface to use (ncurses, dummy, or json)" } },
{ "l", { false, "list existing sessions" } },
{ "clear", { false, "clear dead sessions" } },
{ "ro", { false, "readonly mode" } },
{ "help", { false, "display a help message and quit" } } }
};
try
{
auto show_usage = [&]()
{
write_stdout(format("Usage: {} [options] [file]... [+<line>[:<col>]|+:]\n\n"
"Options:\n"
"{}\n"
"Prefixing a positional argument with a plus (`+`) sign will place the\n"
"cursor at a given set of coordinates, or the end of the buffer if the plus\n"
"sign is followed only by a colon (`:`)\n",
argv[0], generate_switches_doc(param_desc.switches)));
return 0;
};
if (contains(ConstArrayView<char*>{argv+1, (size_t)argc-1}, StringView{"--help"}))
return show_usage();
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ParametersParser parser{params, param_desc};
const bool show_help_message = (bool)parser.get_switch("help");
if (show_help_message)
return show_usage();
const bool list_sessions = (bool)parser.get_switch("l");
const bool clear_sessions = (bool)parser.get_switch("clear");
if (list_sessions or clear_sessions)
{
const StringView username = getpwuid(geteuid())->pw_name;
const StringView tmp_dir = tmpdir();
for (auto& session : list_files(format("{}/kakoune/{}/", tmp_dir,
username)))
{
const bool valid = check_session(session);
if (list_sessions)
write_stdout(format("{}{}\n", session, valid ? "" : " (dead)"));
if (not valid and clear_sessions)
{
char socket_file[128];
format_to(socket_file, "{}/kakoune/{}/{}", tmp_dir,
username, session);
unlink(socket_file);
}
}
return 0;
}
if (auto session = parser.get_switch("p"))
{
for (auto opt : { "c", "n", "s", "d", "e", "E", "ro" })
{
if (parser.get_switch(opt))
{
write_stderr(format("error: -{} is incompatible with -p\n", opt));
return -1;
}
}
return run_pipe(*session);
}
auto client_init = parser.get_switch("e").value_or(StringView{});
auto server_init = parser.get_switch("E").value_or(StringView{});
const UIType ui_type = parse_ui_type(parser.get_switch("ui").value_or("ncurses"));
if (auto keys = parser.get_switch("f"))
{
if (parser.get_switch("ro"))
{
write_stderr("error: -ro is incompatible with -f\n");
return -1;
}
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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, client_init, files,
(bool)parser.get_switch("q"),
parser.get_switch("i").value_or(StringView{}));
}
Vector<StringView> files;
Optional<BufferCoord> init_coord;
for (auto& name : parser)
{
if (not name.empty() and name[0_byte] == '+')
{
if (name == "+" or name == "+:")
{
client_init = client_init + "; exec gj";
continue;
}
auto colon = find(name, ':');
if (auto line = str_to_int_ifp({name.begin()+1, colon}))
{
init_coord = BufferCoord{
*line - 1,
colon != name.end() ?
str_to_int_ifp({colon+1, name.end()}).value_or(1) - 1
: 0
};
continue;
}
}
files.emplace_back(name);
}
if (auto server_session = parser.get_switch("c"))
{
for (auto opt : { "n", "s", "d", "E", "ro" })
{
if (parser.get_switch(opt))
{
write_stderr(format("error: -{} is incompatible with -c\n", opt));
return -1;
}
}
String new_files;
for (auto name : files)
new_files += format("edit '{}';", escape(real_path(name), "'", '\\'));
return run_client(*server_session, new_files + client_init, init_coord, ui_type);
}
else
{
StringView session = parser.get_switch("s").value_or(StringView{});
try
{
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auto flags = (parser.get_switch("n") ? ServerFlags::IgnoreKakrc : ServerFlags::None) |
(parser.get_switch("d") ? ServerFlags::Daemon : ServerFlags::None) |
(parser.get_switch("ro") ? ServerFlags::ReadOnly : ServerFlags::None) |
(argc == 1 and isatty(0) ? ServerFlags::StartupInfo : ServerFlags::None);
return run_server(session, server_init, client_init, init_coord, flags, ui_type, files);
}
catch (convert_to_client_mode& convert)
{
raise(SIGTSTP);
return run_client(convert.session,
format("try %^buffer '{}'; select '{}'^; echo converted to client only mode",
escape(convert.buffer_name, "'^", '\\'), convert.selections), {}, ui_type);
}
}
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}
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catch (parameter_error& error)
{
write_stderr(format("Error while parsing parameters: {}\n"
"Valid switches:\n"
"{}", error.what(),
generate_switches_doc(param_desc.switches)));
return -1;
}
catch (startup_error& error)
{
write_stderr(format("Could not start kakoune: {}\n", error.what()));
return -1;
}
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catch (Kakoune::exception& error)
{
write_stderr(format("uncaught exception ({}):\n{}\n", typeid(error).name(), error.what()));
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return -1;
}
catch (std::exception& error)
{
write_stderr(format("uncaught exception ({}):\n{}\n", typeid(error).name(), error.what()));
return -1;
}
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catch (...)
{
write_stderr("uncaught exception");
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return -1;
}
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return 0;
}