1// certain assertions we should do only when testing arborist itself, because 2// they are too expensive or aggressive and would break user programs if we 3// miss a situation where they are actually valid. 4// 5// call like this: 6// 7// /* istanbul ignore next - debug check */ 8// debug(() => { 9// if (someExpensiveCheck) 10// throw new Error('expensive check should have returned false') 11// }) 12 13// run in debug mode if explicitly requested, running arborist tests, 14// or working in the arborist project directory. 15 16const debug = process.env.ARBORIST_DEBUG !== '0' && ( 17 process.env.ARBORIST_DEBUG === '1' || 18 /\barborist\b/.test(process.env.NODE_DEBUG || '') || 19 process.env.npm_package_name === '@npmcli/arborist' && 20 ['test', 'snap'].includes(process.env.npm_lifecycle_event) || 21 process.cwd() === require('path').resolve(__dirname, '..') 22) 23 24module.exports = debug ? fn => fn() : () => {} 25const red = process.stderr.isTTY ? msg => `\x1B[31m${msg}\x1B[39m` : m => m 26module.exports.log = (...msg) => module.exports(() => { 27 const { format } = require('util') 28 const prefix = `\n${process.pid} ${red(format(msg.shift()))} ` 29 msg = (prefix + format(...msg).trim().split('\n').join(prefix)).trim() 30 console.error(msg) 31}) 32