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Mini Shell
Mini Shell
const { inspect } = require('util')
const npmlog = require('npmlog')
const log = require('./log-shim.js')
const { explain } = require('./explain-eresolve.js')
const _logHandler = Symbol('logHandler')
const _eresolveWarn = Symbol('eresolveWarn')
const _log = Symbol('log')
const _npmlog = Symbol('npmlog')
class Display {
constructor () {
// pause by default until config is loaded
this.on()
log.pause()
}
on () {
process.on('log', this[_logHandler])
}
off () {
process.off('log', this[_logHandler])
// Unbalanced calls to enable/disable progress
// will leave change listeners on the tracker
// This pretty much only happens in tests but
// this removes the event emitter listener warnings
log.tracker.removeAllListeners()
}
load (config) {
const {
color,
timing,
loglevel,
unicode,
progress,
silent,
heading = 'npm',
} = config
// XXX: decouple timing from loglevel
if (timing && loglevel === 'notice') {
log.level = 'timing'
} else {
log.level = loglevel
}
log.heading = heading
if (color) {
log.enableColor()
} else {
log.disableColor()
}
if (unicode) {
log.enableUnicode()
} else {
log.disableUnicode()
}
// if it's silent, don't show progress
if (progress && !silent) {
log.enableProgress()
} else {
log.disableProgress()
}
// Resume displaying logs now that we have config
log.resume()
}
log (...args) {
this[_logHandler](...args)
}
[_logHandler] = (level, ...args) => {
try {
this[_log](level, ...args)
} catch (ex) {
try {
// if it crashed once, it might again!
this[_npmlog]('verbose', `attempt to log ${inspect(args)} crashed`, ex)
} catch (ex2) {
// eslint-disable-next-line no-console
console.error(`attempt to log ${inspect(args)} crashed`, ex, ex2)
}
}
}
[_log] (...args) {
return this[_eresolveWarn](...args) || this[_npmlog](...args)
}
// Explicitly call these on npmlog and not log shim
// This is the final place we should call npmlog before removing it.
[_npmlog] (level, ...args) {
npmlog[level](...args)
}
// Also (and this is a really inexcusable kludge), we patch the
// log.warn() method so that when we see a peerDep override
// explanation from Arborist, we can replace the object with a
// highly abbreviated explanation of what's being overridden.
[_eresolveWarn] (level, heading, message, expl) {
if (level === 'warn' &&
heading === 'ERESOLVE' &&
expl && typeof expl === 'object'
) {
this[_npmlog](level, heading, message)
this[_npmlog](level, '', explain(expl, log.useColor(), 2))
// Return true to short circuit other log in chain
return true
}
}
}
module.exports = Display
Zerion Mini Shell 1.0