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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, Xmake Open Source Community.
--
-- @author ruki
-- @file iconv.lua
--
-- imports
import("core.base.option")
-- the options
local options =
{
{'f', "from", "kv", "utf8", "The source encoding."},
{'t', "to", "kv", "utf8", "The target encoding."},
{'o', "output", "kv", nil, "The output file."},
{nil, "file", "v", nil, "The input file."}
}
-- main entry
function main(...)
-- parse arguments
local argv = table.pack(...)
local args = option.parse(argv, options, "Convert encoding of a file.",
"",
"Usage: xmake l cli.iconv [options] [file]")
-- get arguments
local input_file = args.file
local output_file = args.output
local from_code = args.from
local to_code = args.to
-- read content
local content
if input_file then
local file, errors = io.open(input_file, "r", {encoding = from_code})
if not file then
raise(errors)
end
content = file:read("*all")
file:close()
else
-- TODO: support stdin
raise("Input file required.")
end
-- write content
if output_file then
local file, errors = io.open(output_file, "w", {encoding = to_code})
if not file then
raise(errors)
end
file:write(content)
file:close()
else
-- write to stdout
-- we try to use /dev/stdout to support encoding conversion
local file, errors = io.open("/dev/stdout", "w", {encoding = to_code})
if file then
file:write(content)
file:close()
else
-- fallback to print directly (it may be not correct if the target encoding is not utf8/ansi)
io.write(content)
end
end
end
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