potatOS/minify/CommandLineMinify.lua

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2021-03-31 18:58:54 +00:00
--
-- CommandlineMinify.lua
--
-- A command line utility for minifying lua source code using the minifier.
--
local util = require'Util'
local Parser = require'ParseLua'
local Format_Mini = require'FormatMini'
local ParseLua = Parser.ParseLua
local PrintTable = util.PrintTable
local function splitFilename(name)
table.foreach(arg, print)
if name:find(".") then
local p, ext = name:match("()%.([^%.]*)$")
if p and ext then
if #ext == 0 then
return name, nil
else
local filename = name:sub(1,p-1)
return filename, ext
end
else
return name, nil
end
else
return name, nil
end
end
if #arg == 1 then
local name, ext = splitFilename(arg[1])
local outname = name.."_min"
if ext then outname = outname.."."..ext end
--
local inf = io.open(arg[1], 'r')
if not inf then
print("Failed to open `"..arg[1].."` for reading")
return
end
--
local sourceText = inf:read('*all')
inf:close()
--
local st, ast = ParseLua(sourceText)
if not st then
--we failed to parse the file, show why
print(ast)
return
end
--
local outf = io.open(outname, 'w')
if not outf then
print("Failed to open `"..outname.."` for writing")
return
end
--
outf:write(Format_Mini(ast))
outf:close()
--
print("Minification complete")
elseif #arg == 3 then
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--keep the user from accidentally overwriting their non-minified file with
if arg[1]:find("_min") then
print("Did you mix up the argument order?\n"..
"Current command will minify `"..arg[1].."` and OVERWRITE `"..arg[2].."` with the results")
while true do
io.write("Confirm (yes/cancel): ")
local msg = io.read('*line')
if msg == 'yes' then
break
elseif msg == 'cancel' then
return
end
end
end
local inf = io.open(arg[1], 'r')
if not inf then
print("Failed to open `"..arg[1].."` for reading")
return
end
--
local sourceText = inf:read('*all')
inf:close()
--
local st, ast = ParseLua(sourceText)
if not st then
--we failed to parse the file, show why
print(ast)
return
end
--
if arg[1] == arg[2] then
print("Are you SURE you want to overwrite the source file with a minified version?\n"..
"You will be UNABLE to get the original source back!")
while true do
io.write("Confirm (yes/cancel): ")
local msg = io.read('*line')
if msg == 'yes' then
break
elseif msg == 'cancel' then
return
end
end
end
local outf = io.open(arg[2], 'w')
if not outf then
print("Failed to open `"..arg[2].."` for writing")
return
end
--
local text, map = Format_Mini(ast)
outf:write(text)
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outf:close()
--
local outf = io.open(arg[3], 'w')
if not outf then
print("Failed to open `"..arg[3].."` for writing")
return
end
outf:write(map)
outf:close()
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print("Minification complete")
else
print("Invalid arguments, Usage:\nLuaMinify source [destination]")
end