--[[ MIT License Copyright (c) 2021 Tobias Enderle Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. --]] local json = require("pyluatex-json") local socket = require("socket") pyluatex = pyluatex or { verbose = false, session = "default" } -- status.filename: path to pyluatex.sty local folder = file.pathpart(file.collapsepath(status.filename, true)) local script = file.join(folder, "pyluatex-interpreter.py") local tcp = nil local python_lines = {} local python_output = nil local env_end = "\\end{python}" local function err_cmd(message) return "\\PackageError{PyLuaTeX}{" .. message .. "}{}" end function pyluatex.start(executable) local is_windows = package.config:sub(1,1) ~= "/" local cmd if is_windows then cmd = "start /B " .. executable .. " \"" .. script .. "\"" else cmd = executable .. " \"" .. script .. "\" &" end local f = io.popen(cmd, "r") local port = f:read("*l"):gsub("\r", ""):gsub("\n", "") f:close() if port then tcp = socket.tcp() tcp:connect("127.0.0.1", port) else tex.sprint(err_cmd("Python backend (executable: " .. executable .. ") could not be started")) end end local function request(data) tcp:send(json.encode(data) .. "\n") local output = tcp:receive("*l") local response = json.decode(output) return response.success, response.output end local function log_input(code) texio.write_nl("PyLuaTeX input for session \"" .. pyluatex.session .. "\": " .. code) end local function log_output(code) texio.write_nl("PyLuaTeX output: " .. code) end local function print_lines(str) for s in str:gmatch("[^\r\n]+") do tex.sprint(s) end end function pyluatex.execute(code, write) if pyluatex.verbose then log_input(code) end local success, output = request({ session = pyluatex.session, code = code }) if success then if pyluatex.verbose then log_output(output) end if write then print_lines(output) else return output end else if not pyluatex.verbose then log_input(code) end log_output(output) if write then tex.sprint(err_cmd("Python error (see above)")) end end return nil end function pyluatex.print_env() if python_output ~= nil then print_lines(python_output) python_output = nil end end local function record_line(line) local s, e = line:find(env_end) if s ~= nil then luatexbase.remove_from_callback("process_input_buffer", "pyluatex_record_line") table.insert(python_lines, line:sub(1, s - 1)) local code = table.concat(python_lines, "\n") local output = pyluatex.execute(code, false) if output ~= nil then python_output = output return line:sub(s) else return env_end .. err_cmd("Python error (see above)") .. line:sub(e + 1) end else table.insert(python_lines, line) return "" end end function pyluatex.record_env() python_lines = {} python_output = nil luatexbase.add_to_callback("process_input_buffer", record_line, "pyluatex_record_line") end function pyluatex.run_file(path) local f = io.open(path, "r") if f then local code = f:read("*a") f:close() pyluatex.execute(code, true) else tex.sprint(err_cmd("File not found: " .. path)) end end return pyluatex