add tty and replace clearline

1 files changed, 74 insertions, 0 deletions

diff --git a/xmake/core/base/tty.lua b/xmake/core/base/tty.lua
new file mode 100644
index 000000000..d1245fc1a
--- /dev/null
+++ b/xmake/core/base/tty.lua
@@ -0,0 +1,74 @@
+--!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) 2015-2020, 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
+
+-- 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
+
+-- return module
+return tty