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https://github.com/deno-library/logger
logger for deno
https://github.com/deno-library/logger
consolelogger deno filelogger logger
Last synced: 2 months ago
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logger for deno
- Host: GitHub
- URL: https://github.com/deno-library/logger
- Owner: deno-library
- License: mit
- Created: 2020-06-13T08:33:57.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2024-02-07T07:23:20.000Z (11 months ago)
- Last Synced: 2024-05-01T12:45:10.561Z (8 months ago)
- Topics: consolelogger, deno, filelogger, logger
- Language: TypeScript
- Homepage:
- Size: 418 KB
- Stars: 21
- Watchers: 3
- Forks: 2
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- Changelog: changelog.md
- Funding: .github/FUNDING.yml
- License: LICENSE
Awesome Lists containing this project
README
# deno-logger
[](https://www.npmjs.org/package/@denodnt/logger)
[](https://jsr.io/@deno-lib/logger)
Deno / NodeJS colorful logger colorful logger
For Deno usage refer to [deno-logger doc](https://deno.land/x/logger)
## Useage
### console logger
```js
import Logger from "https://deno.land/x/[email protected]/logger.ts";
const logger = new Logger();
logger.info("i am from consoleLogger", { name: "zfx" });
logger.warn("i am from consoleLogger", 1, "any");
logger.error("i am from consoleLogger", new Error("test"));
```
### file and console logger
```js
import Logger from "https://deno.land/x/[email protected]/logger.ts";
const logger = new Logger();
// console only
logger.info("i am from consoleLogger", { name: "zfx" });
logger.warn("i am from consoleLogger", 1, "any");
logger.error("i am from consoleLogger", new Error("test"));
await logger.initFileLogger("../log");
// file and console
logger.info("i am from fileLogger", { name: "zfx" });
logger.warn("i am from fileLogger", 1, "any");
logger.error("i am from fileLogger", new Error("test"));
```
### file logger only
```js
import Logger from "https://deno.land/x/[email protected]/logger.ts";
const logger = new Logger();
await logger.initFileLogger("../log");
logger.disableConsole();
// file only
logger.info(["i am from fileLogger", 1], { name: "zfx" });
```
### file logger optional parameter
interface
```ts
interface fileLoggerOptions {
rotate?: boolean; // cut by day
maxBytes?: number;
// Only available if maxBytes is provided, Otherwise you will get an error
maxBackupCount?: number;
}
```
example
```js
import Logger from "https://deno.land/x/[email protected]/logger.ts";
const logger = new Logger();
// cut by day
// filename is [date]_[type].log
// example 2020-05-25_warn.log, 2020-05-25_info.log, 2020-05-25_error.log
await logger.initFileLogger("../log", {
rotate: true,
});
// maxBytes
// filename is [type].log.[timestamp]
// example: info.log.1590374415956
await logger.initFileLogger("../log", {
maxBytes: 10 * 1024,
});
// rotate and maxBytes
// filename is [date]_[type].log.[timestamp]
// example: 2020-05-25_info.log.1590374415956
await logger.initFileLogger("../log", {
rotate: true,
maxBytes: 10 * 1024,
});
// maxBytes and maxBackupCount
// filename is [type].log.[n]
// example info.log.1, info.log.2 ...
// when reach maxBackupCount, the [type].log.[maxBackupCount-1] will be overwrite
// detail:
// `maxBytes` specifies the maximum size
// in bytes that the log file can grow to before rolling over to a new one. If the
// size of the new log message plus the current log file size exceeds `maxBytes`
// then a roll over is triggered. When a roll over occurs, before the log message
// is written, the log file is renamed and appended with `.1`. If a `.1` version
// already existed, it would have been renamed `.2` first and so on. The maximum
// number of log files to keep is specified by `maxBackupCount`. After the renames
// are complete the log message is written to the original, now blank, file.
//
// Example: Given `log.txt`, `log.txt.1`, `log.txt.2` and `log.txt.3`, a
// `maxBackupCount` of 3 and a new log message which would cause `log.txt` to
// exceed `maxBytes`, then `log.txt.2` would be renamed to `log.txt.3` (thereby
// discarding the original contents of `log.txt.3` since 3 is the maximum number of
// backups to keep), `log.txt.1` would be renamed to `log.txt.2`, `log.txt` would
// be renamed to `log.txt.1` and finally `log.txt` would be created from scratch
// where the new log message would be written.
await logger.initFileLogger("../log", {
maxBytes: 10 * 1024,
maxBackupCount: 10,
});
// rotate and maxBytes and maxBackupCount
// filename is [date]_[type].log.[n]
// example 2020-05-25_info.log.1, 2020-05-25_info.log.2
// when reach maxBackupCount, the [type].log.[maxBackupCount-1] will be overwrite
await logger.initFileLogger("../log", {
rotate: true,
maxBytes: 10 * 1024,
maxBackupCount: 10,
});
// rotate and maxBackupCount
// maxBackupCount will be ignored
await logger.initFileLogger("../log", {
rotate: true,
maxBackupCount: 10,
});
```
The following conditions will throw an error
```ts
// maxBackupCount
// get error => maxBackupCount must work with maxBytes
await logger.initFileLogger("../log", {
maxBackupCount: 10,
});
// rotate and maxBackupCount
// get error => maxBackupCount must work with maxBytes
await logger.initFileLogger("../log", {
rotate: true,
maxBackupCount: 10,
});
```
## disableConsole and enableConsole
```js
import Logger from "https://deno.land/x/[email protected]/logger.ts";
const logger = new Logger();
// console
logger.info("console enabled, you can see me");
logger.disableConsole();
// no message is logged
logger.info("console disabled");
logger.enableConsole();
// console
logger.info("console enabled, you can see me");
```
## disableFile and enableFile
```js
import Logger from "https://deno.land/x/[email protected]/logger.ts";
const logger = new Logger();
await logger.initFileLogger("../log");
logger.disableFile();
// not log to file
logger.info("file disbaled");
logger.enableFile();
// log to file
logger.info("file enabled, you can see me");
```
## disable and enable
- disable disable write to file and terminal, don't care if it is currently
writing to a file or terminal, but hope to restore the currently configuration
later
- enable restore previous log configuration: file, terminal or both
example:
1. fileLogger => disable => enable => fileLogger
2. consoleLogger => disable => enable => consoleLogger
3. fileLogger, consoleLogger => disable => enable => fileLogger, consoleLogger
```js
import Logger from "https://deno.land/x/[email protected]/logger.ts";
const logger = new Logger();
await logger.initFileLogger("../log");
logger.disable();
logger.enable();
```
## test
```bash
deno test --allow-read --allow-write
```
## Dual-Stack / Triple-Stack integration
A dual-stack project is generaly a npm project that can be import as commonJS
module or as ESM module; So if a project can also be import as a Deno module,
it's a triple-stack one.
To convert your Deno project to a dual-stack npm project, you should use
[deno/dnt](https://deno.land/x/dnt), then create a `_build_npm.ts` or
`scripts/build_npm.ts` that looks like:
```ts
import { build, emptyDir } from "@deno/dnt";
// grap the next version number as you want
const version: Deno.args[0];
await emptyDir("./npm");
await build({
entryPoints: ["./mod.ts"],
outDir: "./npm",
shims: {
deno: true,
},
compilerOptions: {
lib: ["dom", "esnext"],
},
package: {
name: "pkg-name",
version: version,
// ... package stuff
},
// map your favorite deno logger to its npm port.
mappings: {
"https://deno.land/x/[email protected]/logger.ts": {
name: "@denodnt/logger",
version: "1.1.6",
peerDependency: false,
},
},
});
```
## Screenshots
consoleLogger\
fileLogger\
cut logs by day\
More screenshots in the `screenshots` folder.
## Logger interface
```ts
interface fileLoggerOptions {
rotate?: boolean; // cut by day
maxBytes?: number, // the maximum size in bytes that the log file can grow to before rolling over to a new one
maxBackupCount?: number // maxBackupCount must work with maxBytes
}
interface LoggerInerface {
constructor()
info(...args: unknown[]): void
warn(...args: unknown[]): void
error(...args: unknown[]): void
async initFileLogger(dir: string, options: fileLoggerOptions = {}): Promise
disableConsole(): void
enableConsole(): void
disableFile(): void;
enableFile(): void;
disable(): void;
enable(): void;
}
```