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Add unflatten option to cli.js #192

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Add unflatten option to cli.js #192

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3 changes: 3 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -213,18 +213,21 @@ unflatten({

```sh
npx flat foo.json
npx flat --unflatten foo.json
```

Or install the `flat` command globally:

```sh
npm i -g flat && flat foo.json
npm i -g flat && flat --unflatten foo.json
```

Accepts a filename as an argument:

```sh
flat foo.json
flat --unflatten foo.json
```

Also accepts JSON on stdin:
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14 changes: 9 additions & 5 deletions cli.js
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Expand Up @@ -2,9 +2,12 @@
import fs from 'node:fs'
import path from 'node:path'
import readline from 'node:readline'
import { flatten } from './index.js'
import { flatten, unflatten } from './index.js'

const args = process.argv.slice(2)
const shouldUnflatten = args.includes('--unflatten')
const filepath = args.find(arg => !arg.startsWith('--'))

const filepath = process.argv.slice(2)[0]
if (filepath) {
// Read from file
const file = path.resolve(process.cwd(), filepath)
Expand All @@ -25,15 +28,16 @@ if (filepath) {
}

function out (data) {
process.stdout.write(JSON.stringify(flatten(data), null, 2))
const transformed = shouldUnflatten ? unflatten(data) : flatten(data)
process.stdout.write(JSON.stringify(transformed, null, 2))
}

function usage (code) {
console.log(`
Usage:

flat foo.json
cat foo.json | flat
flat [--unflatten] foo.json
cat foo.json | flat [--unflatten]
`)

process.exit(code || 0)
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