loader.lua (e090e09) - memoire

loader.lua

--[[
    deck loading and saving functions (working with Recfiles)
]]

local SRC_DIR = arg[0]:match("^.*/") or ""

local Prompt = dofile(SRC_DIR .. "prompt.lua")
local recrw = dofile(SRC_DIR .. "recrw.lua")

--[[
    load a deck (a table of tables of `Prompt`s) from a Recfile
]]
local function loaddeck(fname)
    local fh = io.open(fname)
    if not fh then return nil end
    local rt = fh:read "a"
    if not rt then return nil end
    fh:close()
    local pr = recrw.read(rt)
    if not pr then return nil end
    local ep = Prompt:fromrecs(pr)
    return ep
end

--[[
    save a deck (a table of tables of `Prompt`s) to a Recfile
]]
local function savedeck(fname, deck)
    local rrf = {}
    for i, cg in ipairs(deck) do
        rrf[i] = Prompt:torec(cg)
    end
    local wot = recrw.write(rrf)
    local fh = io.open(fname, "w")
    if not fh then io.write("couldn't open output\n") end
    local wr, err = fh:write(wot)
    if not wr then io.write("couldn't write to output\n") end
    fh:close()
end

return { load = loaddeck, save = savedeck }

memoire

Load modules correctly independent of working directory