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| 'use strict'
|
| const procLog = require('proc-log')
| const { format } = require('util')
|
| // helper to emit log messages with a predefined prefix
| const logLevels = Object.keys(procLog).filter((k) => typeof procLog[k] === 'function')
| const withPrefix = (prefix) => logLevels.reduce((acc, level) => {
| acc[level] = (...args) => procLog[level](prefix, ...args)
| return acc
| }, {})
|
| // very basic ansi color generator
| const COLORS = {
| wrap: (str, colors) => {
| const codes = colors.filter(c => typeof c === 'number')
| return `\x1b[${codes.join(';')}m${str}\x1b[0m`
| },
| inverse: 7,
| fg: {
| black: 30,
| red: 31,
| green: 32,
| yellow: 33,
| blue: 34,
| magenta: 35,
| cyan: 36,
| white: 37
| },
| bg: {
| black: 40,
| red: 41,
| green: 42,
| yellow: 43,
| blue: 44,
| magenta: 45,
| cyan: 46,
| white: 47
| }
| }
|
| class Logger {
| #buffer = []
| #paused = null
| #level = null
| #stream = null
|
| // ordered from loudest to quietest
| #levels = [{
| id: 'silly',
| display: 'sill',
| style: { inverse: true }
| }, {
| id: 'verbose',
| display: 'verb',
| style: { fg: 'cyan', bg: 'black' }
| }, {
| id: 'info',
| style: { fg: 'green' }
| }, {
| id: 'http',
| style: { fg: 'green', bg: 'black' }
| }, {
| id: 'notice',
| style: { fg: 'cyan', bg: 'black' }
| }, {
| id: 'warn',
| display: 'WARN',
| style: { fg: 'black', bg: 'yellow' }
| }, {
| id: 'error',
| display: 'ERR!',
| style: { fg: 'red', bg: 'black' }
| }]
|
| constructor (stream) {
| process.on('log', (...args) => this.#onLog(...args))
| this.#levels = new Map(this.#levels.map((level, index) => [level.id, { ...level, index }]))
| this.level = 'info'
| this.stream = stream
| procLog.pause()
| }
|
| get stream () {
| return this.#stream
| }
|
| set stream (stream) {
| this.#stream = stream
| }
|
| get level () {
| return this.#levels.get(this.#level) ?? null
| }
|
| set level (level) {
| this.#level = this.#levels.get(level)?.id ?? null
| }
|
| isVisible (level) {
| return this.level?.index <= this.#levels.get(level)?.index ?? -1
| }
|
| #onLog (...args) {
| const [level] = args
|
| if (level === 'pause') {
| this.#paused = true
| return
| }
|
| if (level === 'resume') {
| this.#paused = false
| this.#buffer.forEach((b) => this.#log(...b))
| this.#buffer.length = 0
| return
| }
|
| if (this.#paused) {
| this.#buffer.push(args)
| return
| }
|
| this.#log(...args)
| }
|
| #color (str, { fg, bg, inverse }) {
| if (!this.#stream?.isTTY) {
| return str
| }
|
| return COLORS.wrap(str, [
| COLORS.fg[fg],
| COLORS.bg[bg],
| inverse && COLORS.inverse
| ])
| }
|
| #log (levelId, msgPrefix, ...args) {
| if (!this.isVisible(levelId) || typeof this.#stream?.write !== 'function') {
| return
| }
|
| const level = this.#levels.get(levelId)
|
| const prefixParts = [
| this.#color('gyp', { fg: 'white', bg: 'black' }),
| this.#color(level.display ?? level.id, level.style)
| ]
| if (msgPrefix) {
| prefixParts.push(this.#color(msgPrefix, { fg: 'magenta' }))
| }
|
| const prefix = prefixParts.join(' ').trim() + ' '
| const lines = format(...args).split(/\r?\n/).map(l => prefix + l.trim())
|
| this.#stream.write(lines.join('\n') + '\n')
| }
| }
|
| // used to suppress logs in tests
| const NULL_LOGGER = !!process.env.NODE_GYP_NULL_LOGGER
|
| module.exports = {
| logger: new Logger(NULL_LOGGER ? null : process.stderr),
| stdout: NULL_LOGGER ? () => {} : (...args) => console.log(...args),
| withPrefix,
| ...procLog
| }
|
|
