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--!A cross-platform build utility based on Lua
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015-present, TBOOX Open Source Group.
--
-- @author ruki
-- @file tty.lua
--
-- define module
local tty = tty or {}
-- load modules
local io = require("base/io")
-- @see http://www.termsys.demon.co.uk/vtansi.htm
-- write control characters
function tty._iowrite(...)
local isatty = tty._ISATTY
if isatty == nil then
isatty = io.isatty()
tty._ISATTY = isatty
end
if isatty then
io.write(...)
end
end
-- erases from the current cursor position to the end of the current line.
function tty.erase_line_to_end()
tty._iowrite("\x1b[K")
return tty
end
-- erases from the current cursor position to the start of the current line.
function tty.erase_line_to_start()
tty._iowrite("\x1b[1K")
return tty
end
-- erases the entire current line
function tty.erase_line()
tty._iowrite("\x1b[2K")
return tty
end
-- erases the screen from the current line down to the bottom of the screen.
function tty.erase_down()
tty._iowrite("\x1b[J")
return tty
end
-- erases the screen from the current line up to the top of the screen.
function tty.erase_up()
tty._iowrite("\x1b[1J")
return tty
end
-- erases the screen with the background colour and moves the cursor to home.
function tty.erase_screen()
tty._iowrite("\x1b[2J")
return tty
end
-- save current cursor position.
function tty.cursor_save()
tty._iowrite("\x1b[s")
return tty
end
-- restores cursor position after a save cursor.
function tty.cursor_restore()
tty._iowrite("\x1b[u")
return tty
end
-- save current cursor position and color attrs
function tty.cursor_and_attrs_save()
tty._iowrite("\x1b7")
return tty
end
-- restores cursor position and color attrs after a save cursor.
function tty.cursor_and_attrs_restore()
tty._iowrite("\x1b8")
return tty
end
-- carriage return
function tty.cr()
tty._iowrite("\r")
return tty
end
-- flush control
function tty.flush()
if io.isatty() then
io.flush()
end
return tty
end
-- get terminal name
-- - xterm
-- - cmd
-- - vstudio (in visual studio)
-- - vscode (in vscode)
-- - msys2
-- - cygwin
-- - powershell
-- - windows-terminal
-- - gnome-terminal
-- - xfce4-terminal
-- - konsole
-- - terminator
-- - rxvt
-- - lxterminal
-- - unknown
--
function tty.term()
local term = tty._TERM
if term == nil then
-- get term from $TERM_PROGRAM
if term == nil then
local TERM_PROGRAM = os.getenv("TERM_PROGRAM")
if TERM_PROGRAM ~= nil then
if TERM_PROGRAM:find("vscode", 1, true) then
term = "vscode"
end
end
end
-- get term from system
if term == nil then
local subhost = xmake._SUBHOST
if subhost == "windows" then
if os.getenv("XMAKE_IN_VSTUDIO") then
term = "vstudio"
elseif os.getenv("WT_SESSION") then
term = "windows-terminal"
elseif os.getenv("PROMPT") then -- $PROMPT == "$P$G"
term = "cmd"
else
-- TODO maybe powershell if no $PROMPT, we need improve it
term = "powershell"
end
elseif subhost == "msys" then
term = "msys2"
elseif subhost == "cygwin" then
term = "cygwin"
elseif subhost == "macosx" then
term = "xterm"
end
end
-- get term from $TERM
if term == nil then
local TERM = os.getenv("TERM")
if TERM ~= nil then
if TERM:find("xterm", 1, true) then
term = "xterm"
end
end
end
tty._TERM = term or "unknown"
end
return term
end
-- has emoji?
function tty.has_emoji()
local has_emoji = tty._HAS_EMOJI
if has_emoji == nil then
local term = tty.term()
local winos = require("base/winos")
-- before win7 on cmd? disable it
if has_emoji == nil and term == "cmd" and winos.version():le("win7") then
has_emoji = false
end
-- on msys2/cygwin? disable it
if has_emoji == nil and (term == "msys2" or term == "cygwin") then
has_emoji = false
end
-- enable it by default
if has_emoji == nil then
has_emoji = true
end
tty._HAS_EMOJI = has_emoji or false
end
return has_emoji
end
-- return module
return tty
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