add cli.iconv module

1 files changed, 82 insertions, 0 deletions

diff --git a/xmake/modules/cli/iconv.lua b/xmake/modules/cli/iconv.lua
new file mode 100644
index 000000000..57e505323
--- /dev/null
+++ b/xmake/modules/cli/iconv.lua
@@ -0,0 +1,82 @@
+--!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