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const { inspect } = require('util')
const npmlog = require('npmlog')
const log = require('./log-shim.js')
const { explain } = require('./explain-eresolve.js')
class Display {
#chalk = null
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,
chalk,
timing,
loglevel,
unicode,
progress,
silent,
heading = 'npm',
} = config
this.#chalk = chalk
// npmlog is still going away someday, so this is a hack to dynamically
// set the loglevel of timing based on the timing flag, instead of making
// a breaking change to npmlog. The result is that timing logs are never
// shown except when the --timing flag is set. We also need to change
// the index of the silly level since otherwise it is set to -Infinity
// and we can't go any lower than that. silent is still set to Infinify
// because we DO want silent to hide timing levels. This allows for the
// special case of getting timing information while hiding all CLI output
// in order to get perf information that might be affected by writing to
// a terminal. XXX(npmlog): this will be removed along with npmlog
log.levels.silly = -10000
log.levels.timing = log.levels[loglevel] + (timing ? 1 : -1)
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, this.#chalk, 2))
// Return true to short circuit other log in chain
return true
}
}
}
module.exports = Display