Marc Mintel
5397309103
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74 lines
1.9 KiB
Plaintext
74 lines
1.9 KiB
Plaintext
'use strict'
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module.exports = prettifyMetadata
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/**
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* @typedef {object} PrettifyMetadataParams
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* @property {object} log The log that may or may not contain metadata to
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* be prettified.
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* @property {PrettyContext} context The context object built from parsing
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* the options.
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*/
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/**
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* Prettifies metadata that is usually present in a Pino log line. It looks for
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* fields `name`, `pid`, `hostname`, and `caller` and returns a formatted string using
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* the fields it finds.
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*
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* @param {PrettifyMetadataParams} input
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*
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* @returns {undefined|string} If no metadata is found then `undefined` is
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* returned. Otherwise, a string of prettified metadata is returned.
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*/
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function prettifyMetadata ({ log, context }) {
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const { customPrettifiers: prettifiers, colorizer } = context
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let line = ''
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if (log.name || log.pid || log.hostname) {
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line += '('
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if (log.name) {
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line += prettifiers.name
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? prettifiers.name(log.name, 'name', log, { colors: colorizer.colors })
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: log.name
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}
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if (log.pid) {
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const prettyPid = prettifiers.pid
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? prettifiers.pid(log.pid, 'pid', log, { colors: colorizer.colors })
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: log.pid
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if (log.name && log.pid) {
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line += '/' + prettyPid
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} else {
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line += prettyPid
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}
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}
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if (log.hostname) {
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// If `pid` and `name` were in the ignore keys list then we don't need
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// the leading space.
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const prettyHostname = prettifiers.hostname
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? prettifiers.hostname(log.hostname, 'hostname', log, { colors: colorizer.colors })
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: log.hostname
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line += `${line === '(' ? 'on' : ' on'} ${prettyHostname}`
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}
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line += ')'
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}
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if (log.caller) {
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const prettyCaller = prettifiers.caller
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? prettifiers.caller(log.caller, 'caller', log, { colors: colorizer.colors })
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: log.caller
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line += `${line === '' ? '' : ' '}<${prettyCaller}>`
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}
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if (line === '') {
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return undefined
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} else {
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return line
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}
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}
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