const { writeFile , readFile , unlink } = require ( "fs" ) ; const tmp = require ( "tmp" ) ; const { callback } = require ( "awaiting" ) ; const { spawn } = require ( "child_process" ) ; interface ParserOptions { parser ? : string ; tabWidth ? : number ; lineWidth ? : number ; } function close ( proc , cb ) { proc . on ( "close" , ( code ) => cb ( undefined , code ) ) ; } function formatR ( input_path ) { const expr = `suppressMessages(require(formatR)); tidy_source(source="${ input_path }", file="${ input_path }", indent=2, width.cutoff=80)` ; return spawn ( "R" , [ "--quiet" , "--vanilla" , "--no-save" , "-e" , expr ] ) ; } export async function r_format ( input , _ , logger ) { const input_path = await callback ( tmp . file ) ; try { await callback ( writeFile , input_path , input ) ; const r_formatter = formatR ( input_path ) ; let stdout = "" ; let stderr = "" ; r_formatter . stdout . on ( "data" , ( data ) => ( stdout += data . toString ( ) ) ) ; r_formatter . stderr . on ( "data" , ( data ) => ( stderr += data . toString ( ) ) ) ; const code = await callback ( close , r_formatter ) ; if ( code ) { const err_msg = `${ stderr }` ; logger . debug ( `R_FORMAT ${ err_msg }` ) ; throw new Error ( err_msg ) ; } const output = await callback ( readFile , input_path ) ; const s = output . toString ( "utf-8" ) ; return s ; } finally { unlink ( input_path , ( ) => { } ) ; } }