gist command for computercraft turtles

local function printUsage()
    print( "Usage: gist get <code> <filename>" )
end

local tArgs = { ... }
if #tArgs < 2 then
    printUsage()
    return
end

if not http then
    print( "Gist requires http API" )
    print( "Set enableAPI_http to 1 in mod_ComputerCraft.cfg" )
    return
end

local sCommand = tArgs[1]
if sCommand == "get" then
    -- Download a file from gist.github.com
    if #tArgs < 3 then
        printUsage()
        return
    end

    -- Determine file to download
    local sCode = tArgs[2]
    local sFile = tArgs[3]
    local sPath = shell.resolve( sFile )
    if fs.exists( sPath ) then
        print( "File already exists" )
        return
    end

    -- GET the contents from github
    print( "Connecting to gist.github.com... " )
    local response = http.get( "https://gist.github.com/"..sCode.."/raw" )
    print( "https://gist.github.com/"..sCode.."/raw" )

    if response then
        print( "Success." )

        local sResponse = response.readAll()
        response.close()

        local file = fs.open( sPath, "w" )
        file.write( sResponse )
        file.close()

        print( "Downloaded as "..sFile )

    else
        print( "Failed." )
    end

else
    printUsage()
    return
end