UCOMmandIt
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uci-utils-logger
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Moved so single main environment variable UCI_ENV 

now checks for development and production.
Production will write a file to default location if none given
Example can be run in numerous ways from npm scripts
add readme.md documenatation.
need to add mocha tests
master
David Kebler 2019-02-04 15:48:46 -08:00
parent 88c5886a58
commit 893f88b20d
4 changed files with 178 additions and 52 deletions
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41
example/example.js
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@ -1,19 +1,44 @@
import logger from '../src/logger' import logger from '../src/logger'
let log = {} let log = {}
class LOGTEST { class LogTest {
constructor(opts) { constructor(opts) {
log = logger({ log = logger({
name: 'test', // pretty: {translateTime:true, colorize:true, levelFirst:true } // options for pino pretty printer
id: opts.id, // env:'', // 'dev' or 'pro' -- can be use to set/override UCI_ENV environment variable
file: 'example/example.js', // enForce: false, // only used with .evn. if true will override UCI_ENV if it is set, otherwise no
class: 'LOGTEST' // level:'info', // info is default level, set level to lowest visible
// clear: false, // true for log files will clear the current log file on restart
// logFileName:'test', // if not supplied log filename will be generated from timestamp
// below properties are optional and are passed to child logger instance and will be part of json log entry
// libraryName: 'UCI', // will be logged as name: can be used to identify logs of related packages, can be set via UCI_LOG_NAME env variable
appName:'uci-example-logger', //will be used for logging directory name if supplied and will be logged as well
package: '@uci/logger', // name of package with scope per package.json
// repo: // will use scope-name from package prop if not supplied
id: opts.id, // can pass a unique if for easy later search/filtering
// file: 'example/example.js', // path (to repo root) of actual file running this logger, default is ./src/<package without scope>.js
class: 'LogTest', // The class that created this logger if any
// one can pass through additional props to log for every log
// should not use any keys above or
// level,time,msg,pid,hostname
// logPath,instanceCreatedHR,instanceCreated as keys will be merged
// NOTE: more props can be added at run time by passing an object of props
additional: {anotherprop:'test'} // should do not use any keys above or 'level,logPath,package,instanceCreatedHR,instanceCreated' as keys will be merged
}) })
} }
logit() {
log.trace('this is a trace level logged message')
log.debug('this is a debug level logged message')
log.info({runtimeprop:'somevalue', msg:'this is a info level logged message'})
log.warn('this is a warn level logged message')
log.error('this is a error level logged message')
log.fatal('this is a fatal level logged message')
log.clear('This would clear the log')
}
} }
let test = new LOGTEST({id:'process-test1'}) let test = new LogTest({id:'logtest-via-new'})
log.info({test:'filter', msg:'this is a logged message'}) test.logit()
log.fatal('this is a fatal logged message')

21
package.json
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"description": "Parent Logger for all UCI modules", "description": "Parent Logger for all UCI modules",
"main": "src/logger", "main": "src/logger",
"scripts": { "scripts": {
"testw": "mocha -r esm test/*.test.mjs --watch --recurse --watch-extensions mjs", "testd": "./node_modules/.bin/nodemon --exec './node_modules/.bin/mocha -r esm --timeout 30000'",
"test": "mocha -r esm test/*.test.mjs", "test": "./node_modules/.bin/mocha -r esm --timeout 30000 || exit 0",
"testci": "istanbul cover ./node_modules/.bin/_mocha --report lcovonly -- -R spec --recursive && codecov || true", "testci": "istanbul cover ./node_modules/.bin/_mocha --report lcovonly -- -R spec --recursive && codecov || true",
"example": "node -r esm example/example", "none": "node -r esm example/example",
"dev": "UCI_DEV=true ./node_modules/.bin/nodemon -r esm example/example", "dev": "UCI_ENV=dev ./node_modules/.bin/nodemon -r esm example/example",
"log": "UCI_LOG=true ./node_modules/.bin/nodemon -r esm example/example", "dev:info": "UCI_ENV=dev UCI_LOG_SEARCH='level==`30`' ./node_modules/.bin/nodemon -r esm example/example",
"pro": "UCI_PROD=./test/logs/uci.log node -r esm example/example" "dev:fatal": "UCI_ENV=dev UCI_LOG_SEARCH='level==`60`' ./node_modules/.bin/nodemon -r esm example/example",
"json": "UCI_ENV=dev UCI_LOG_JSON=true ./node_modules/.bin/nodemon -r esm example/example",
"pro": "UCI_ENV='pro' node -r esm example/example",
"pro:alt": "UCI_ENV='pro' UCI_LOG_PATH=./example/example.log node -r esm example/example"
}, },
"author": "David Kebler", "author": "David Kebler",
"license": "MIT", "license": "MIT",
@ -28,16 +31,18 @@
}, },
"homepage": "https://github.com/uCOMmandIt/uci-changeme#readme", "homepage": "https://github.com/uCOMmandIt/uci-changeme#readme",
"dependencies": { "dependencies": {
"env-paths": "^2.0.0",
"make-dir": "^1.3.0",
"pino": "^5.11.1", "pino": "^5.11.1",
"pino-pretty": "^2.5.0" "pino-pretty": "^2.5.0"
}, },
"devDependencies": { "devDependencies": {
"chai": "^4.2.0", "chai": "^4.2.0",
"chai-as-promised": "^7.1.1",
"codecov": "^3.1.0", "codecov": "^3.1.0",
"esm": "^3.1.2", "esm": "^3.1.2",
"istanbul": "^0.4.5", "istanbul": "^0.4.5",
"mocha": "^5.2.0", "mocha": "^5.2.0",
"nodemon": "^1.18.9" "nodemon": "^1.18.9",
"test-console": "^1.1.0"
} }
} }

88
readme.md
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# uCOMmandIt JSON Logger `# uCOMmandIt JSON Logger
runtime module logger based on pino ### json logger based on pino.
run example as either ## How to by Example
`npm run log` see [example](./example/example.js) for explanation of options and use in a es6 class allowing logging in any method of the class
for json logging
or for pretty output `npm run dev` ```javascript
// pretty: {translateTime:true, colorize:true, levelFirst:true } // options for pino pretty printer
// env:'', // 'dev' or 'pro' -- can be use to set/override UCI_ENV environment variable
// enForce: false, // only used with .evn. if true will override UCI_ENV if it is set, otherwise no
// level:'info', // info is default level, set level to lowest visible
// clear: false, // true for log files will clear the current log file on restart
// logFileName:'test', // if not supplied log filename will be generated from timestamp
// below properties are optional and are passed to child logger instance and will be part of json log entry
// libraryName: 'UCI', // will be logged as name: can be used to identify logs of related packages, can be set via UCI_LOG_NAME env variable
appName:'uci-example-logger', //will be used for logging directory name if supplied and will be logged as well
package: '@uci/logger', // name of package with scope per package.json
// repo: // will use scope-name from package prop if not supplied
id: opts.id, // can pass a unique if for easy later search/filtering
// file: 'example/example.js', // path (to repo root) of actual file running this logger, default is ./src/<package without scope>.js
class: 'LogTest', // The class that created this logger if any
// one can pass through additional props to log for every log
// should not use any keys above or
// level,time,msg,pid,hostname
// logPath,instanceCreatedHR,instanceCreated as keys will be merged
// NOTE: more props can be added at run time by passing an object of props
additional: {anotherprop:'test'} // should do not use any keys above or 'level,logPath,package,instanceCreatedHR,instanceCreated' as keys will be merged
```
to run the example clone reop and then `npm install` from root
then
`npm run [script]`
available scripts for example file
- `none`: no logs to console or file
- `dev`: all levels pretty printed to console/stdout
- `dev:info`: show/filter only level 30 (info) logs pretty printed to console
- `dev:fatal`: show/filer only level 60 (fatal) logs pretty printed to console
- `json`: log to console but as raw json
- `pro`: log to a file in the userspace default log directory location
- `pro:alt`: log to a supplied/alternate file (path) location in this case `./example/example.log`
## Environment Variables
- `UCI_ENV='dev'|'pro'|'node'`, `dev` outputs to console, `pro` outputs to file, `node` will follow whatever `NODE_ENV` is set to.
- `UCI_LOG_PATH=<some file path>` force logging to go to some particular file, also setable via options, see above
- `UCI_LOG_JSON=true` will not pretty output to console but rather as raw json. Useful for piping to a json log processor such as pino-colada
- `UCI_LOG_PRETTY`={} the pretty option for pino pretty, also setable via options, see above
- `UCI_LOG_SEARCH='key == `\``value`\``'` will filter pretty/dev logs. _note:_ ALL search values regardless of type MUST be escaped with ``
## Usage
standalone (not in a class constructor as in example)
lilke this.
import logger from '../src/logger'
opts = {} // see above
let log = logger(opts)
once you have created a Logger as a `global` in your module you can log per http://getpino.io/#/docs/api?id=logger
like so
```javascript
log.trace('this is a trace level logged message')
log.debug('this is a debug level logged message')
log.info({runtimeprop:'somevalue', msg:'this is a info level logged message'})
log.warn('this is a warn level logged message')
log.error('this is a error level logged message')
log.fatal('this is a fatal level logged message')
```
for search/filter use environment variable you can change visible levels on the fly http://getpino.io/#/docs/api?id=level
`UCI_LOG_SEARCH='key == `\`value\``' npm run dev` like so
note: ALL search values regardless of type MUST be escaped with `` `log.level('debug')` or in the options, see above
## More Help
this package/model being a simple extension of the pino json logger check their documentation http://getpino.io/#/

68
src/logger.js
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import pino from 'pino' import pino from 'pino'
import { homedir } from 'os' import envPaths from 'env-paths'
import { sync as mkdir } from 'make-dir'
import { dirname, basename } from 'path'
let pretty = false function child (opts) {
if(process.env.UCI_DEV) {
pretty = process.env.UCI_LOG_PRETTY || {translateTime:true, colorize:true, levelFirst:true } if (opts.env) (opts.envForce) ? (process.env.UCI_ENV = opts.env) : (process.env.UCI_ENV = process.env.UCI_ENV || opts.env)
if (process.env.UCI_ENV === 'node') process.env.UCI_ENV = process.env.NODE_ENV
let pretty = false
if(process.env.UCI_ENV === 'dev' || process.env.UCI_ENV === 'development') {
if (process.env.UCI_LOG_JSON !=='true') {
pretty = process.env.UCI_LOG_PRETTY || opts.pretty || {translateTime:true, colorize:true, levelFirst:true }
pretty.search = process.env.UCI_LOG_SEARCH pretty.search = process.env.UCI_LOG_SEARCH
} }
}
let LOG = process.env.UCI_LOG || process.env.UCI_DEV || process.env.UCI_PROD const DATE_TIME = new Date(Date.now()).toISOString().replace( /[:.]+/g, '-' )
let LOG_PATH = (process.env.UCI_PROD===true) ? homedir()+'/logs/uci.log' : process.env.UCI_PROD
const logger = pino({ const LOG_PATH = (process.env.UCI_ENV=== 'production' || process.env.UCI_ENV=== 'pro' || process.env.UCI_ENV=== 'logfile' )
name: 'UCI', ? ( process.env.UCI_LOG_PATH || `${envPaths(opts.appName || opts.name || 'default').log}/${opts.logFileName || DATE_TIME}.log`) : null
enabled: !!LOG,
if (LOG_PATH) {
try { mkdir(dirname(LOG_PATH)) }
catch(err) { throw err }
}
// console.log('making logger (env,json,pretty,pretty-search,path)',process.env.UCI_ENV,process.env.UCI_LOG_JSON,pretty,process.env.UCI_LOG_SEARCH,LOG_PATH)
const logger = pino({
name: opts.libraryName || process.env.UCI_LOG_NAME || 'UCI',
enabled: !!process.env.UCI_ENV,
safe: true, safe: true,
serializers: { serializers: {
req: pino.stdSerializers.req, req: pino.stdSerializers.req,
res: pino.stdSerializers.res res: pino.stdSerializers.res
}, },
prettyPrint: pretty prettyPrint: pretty
}, },
// if production not enabled then LOG_PATH is empty and logs go to stdout/stderr and can be piped from there // if production not enabled then LOG_PATH is empty and logs go to stdout/stderr and can be piped from there
LOG_PATH LOG_PATH
) )
function child (opts) { logger.clear = value => {console.log(value)}
const LOG_OPTS = {
repo: opts.repo || 'uci-'+ opts.name, let logOpts = {
package: opts.package || '@uci/'+ opts.name, level:opts.level,
file: opts.file || `src/${opts.name}.js`, logPath: LOG_PATH, // if logging to file
appName: opts.appName,
repo: opts.repo || (opts.package) ? opts.package.replace( /[@]+/g, '' ).replace( /[/]+/g, '-' ) : null,
package: opts.package,
file: opts.file || `src/${basename(opts.package)}.js`,
class: opts.class || (opts.name.charAt(0).toUpperCase() + opts.name.slice(1)), class: opts.class || (opts.name.charAt(0).toUpperCase() + opts.name.slice(1)),
id: opts.id || opts.name || 'none', id: opts.id || opts.name || 'none',
instance_created:new Date().getTime() instanceCreatedHR:DATE_TIME,
instanceCreated:new Date().getTime()
} }
return logger.child(LOG_OPTS)
logOpts = Object.assign(logOpts,opts.additional)
return logger.child(logOpts)
} }
export default child export default child