modlib/file.lua

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2.7 KiB
Lua
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2020-02-09 01:39:54 +01:00
function read(filename)
local file=io.open(filename,"r")
if file==nil then
return nil
end
local content=file:read("*a")
file:close()
return content
end
function write(filename, new_content)
local file=io.open(filename,"w")
if file==nil then
return false
end
file:write(new_content)
file:close()
return true
end
function append(filename, new_content)
local file=io.open(filename,"a")
if file==nil then
return false
end
file:write(new_content)
file:close()
return true
end
function exists(filename)
local file=io.open(filename, "r")
if file==nil then
return false
end
file:close()
return true
end
function create_if_not_exists(filename, content)
if not exists(filename) then
write(filename, content or "")
return true
end
return false
end
function create_if_not_exists_from_file(filename, src_filename)
return create_if_not_exists(filename, read(src_filename))
end
-- Process Bridge Helpers
process_bridges={}
function process_bridge_build(name, input, output, logs)
if not input or not output or not logs then
minetest.mkdir(minetest.get_worldpath().."/bridges/"..name)
end
input=input or minetest.get_worldpath().."/bridges/"..name.."/input.txt"
output=output or minetest.get_worldpath().."/bridges/"..name.."/output.txt"
logs=logs or minetest.get_worldpath().."/bridges/"..name.."/logs.txt"
-- Clear input
write(input, "")
-- Clear output
write(output, "")
-- Create logs if not exists
create_if_not_exists(logs, "")
process_bridges[name]={input=input, output=output, logs=logs, output_file=io.open(output,"a")}
end
function process_bridge_listen(name, line_consumer, step)
local bridge=process_bridges[name]
modlib.minetest.register_globalstep(step or 0.1, function(dtime)
local content=io.open(bridge.input, "r")
local line=content:read()
while line do
line_consumer(line)
line=content:read()
end
write(bridge.input, "")
end)
end
function process_bridge_serve(name, step)
local bridge=process_bridges[name]
modlib.minetest.register_globalstep(step or 0.1, function(dtime)
bridge.output_file:close()
process_bridges[name].output_file=io.open(bridge.output,"a")
end)
end
function process_bridge_write(name, message)
local bridge=process_bridges[name]
bridge.output_file:write(message.."\n")
--append(bridge.input, message)
end
function process_bridge_start(name, command, os_execute)
local bridge=process_bridges[name]
os_execute(string.format(command, bridge.output, bridge.input, bridge.logs))
end