johnnycache
Super simple file operation cache
Last updated 3 years ago by jmversteeg .
MIT · Repository · Bugs · Original npm · Tarball · package.json
$ cnpm install johnnycache 
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johnnycache

Super simple file operation cache

Build Status Code Coverage NPM Version

Install

$ yarn add johnnycache@next

Usage

const Cache = require('johnnycache');
const exec  = require('execa').shell;

const cache = new Cache();

const npmInstall = new Cache.Intent(() => exec('npm install'), {
    input:  ['package.json'],
    output: ['node_modules'],
});

await cache.run(npmInstall);

API

Cache([options])

Constructor

options

workingDirectory

Type: string

Default: process.cwd()

Base path for cache input and output options.

workspace

Type: string

Default: path.join(process.cwd(), '.johnny')

The path to the cache folder (will be created if it doesn't exist)

maxSize

Type: string

Default: 512mb

The maximum size of the cache folder. Once this is exceeded, existing cached operation results will be intelligently purged based on the time of creation, the filesize, the time it originally took to run the operation, and the degree of redundancy.

Note: Expired cache results (based on ttl) will always be purged regardless of whether the max cache size is hit.

new Cache.Intent(run, options)

Create a new operation intent.

run

Type: function

A function that returns a promise for the file operation's completion. The promise will resolve into an instance of either SavedToCache, RestoredFromCache.

options

input

Type: string|string[] (optional)

A glob/directory or a mixed array of globs/directories that indicate the files of which the hash should be calculated to check whether there is a cached version of the operation

output

Type: string|string[]

A glob/directory or a mixed array of globs/directories that indicate the files that are produced as a result of the operation

ttl

Type: number

Ttl (time-to-live) in milliseconds. If none given, the cache will not expire and will only be purged automatically if the total cache size exceeds the configured maximum.

action

Type: string

Default: Automatically generated string based on input and output arguments

Identifier for the operation

compress

Type: boolean

Default: false

Whether to compress cached files - if enabled, a .tar.gz file will be generated instead of a .tar file.

Cache.run(intent)

Run the operation, or restore cached results for the operation.

License

MIT © sgtlambda

dependency Status devDependency Status


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