local shell=require("shell")
local process=require("process")

local args,options=shell.parse(...)

if#args~=1 then
io.stderr:write("specify a single file to source\n");
return 1
end

local file,open_reason=io.open(args[1],"r")

if not file then
if not options.q then
io.stderr:write(string.format("could not source %s because: %s\n",args[1],open_reason));
end
return 1
end

local lines=file:lines()

while true do
local line=lines()
if not line then
break
end
local current_data=process.info().data

local source_proc=process.load((assert(os.getenv("SHELL"),"no $SHELL set")))
local source_data=process.list[source_proc].data
source_data.aliases=current_data.aliases
source_data.vars=current_data.vars
process.internal.continue(source_proc,_ENV,line)
end

file:close()