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Mini Shell
Mini Shell
const log = require('proc-log')
const mkdirp = require('mkdirp')
const fs = require('fs')
const { dirname } = require('path')
const os = require('os')
const { inspect, format } = require('util')
const { bin: options } = require('./options.js')
// add a meta method to proc-log for passing optional
// metadata through to log handlers
const META = Symbol('meta')
const parseArgs = (...args) => {
const { [META]: isMeta } = args[args.length - 1] || {}
return isMeta
? [args[args.length - 1], ...args.slice(0, args.length - 1)]
: [{}, ...args]
}
log.meta = (meta = {}) => ({ [META]: true, ...meta })
const levels = new Map([
'silly',
'verbose',
'info',
'http',
'notice',
'warn',
'error',
'silent',
].map((level, index) => [level, index]))
const addLogListener = (write, { eol = os.EOL, loglevel = 'silly', colors = false } = {}) => {
const levelIndex = levels.get(loglevel)
const magenta = m => colors ? `\x1B[35m${m}\x1B[39m` : m
const dim = m => colors ? `\x1B[2m${m}\x1B[22m` : m
const red = m => colors ? `\x1B[31m${m}\x1B[39m` : m
const formatter = (level, ...args) => {
const depth = level === 'error' && args[0] && args[0].code === 'ERESOLVE' ? Infinity : 10
if (level === 'info' && args[0] === 'timeEnd') {
args[1] = dim(args[1])
} else if (level === 'error' && args[0] === 'timeError') {
args[1] = red(args[1])
}
const messages = args.map(a => typeof a === 'string' ? a : inspect(a, { depth, colors }))
const pref = `${process.pid} ${magenta(level)} `
return pref + format(...messages).trim().split('\n').join(`${eol}${pref}`) + eol
}
process.on('log', (...args) => {
const [meta, level, ...logArgs] = parseArgs(...args)
if (levelIndex <= levels.get(level) || meta.force) {
write(formatter(level, ...logArgs))
}
})
}
if (options.loglevel !== 'silent') {
addLogListener((v) => process.stderr.write(v), {
eol: '\n',
colors: options.colors,
loglevel: options.loglevel,
})
}
if (options.logfile) {
log.silly('logfile', options.logfile)
mkdirp.sync(dirname(options.logfile))
const fd = fs.openSync(options.logfile, 'a')
addLogListener((str) => fs.writeSync(fd, str))
}
module.exports = log
Zerion Mini Shell 1.0