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#!/usr/bin/env node
/**
* Set GeoJSON id
*/
const fs = require('fs')
const { Transform, pipeline } = require('stream')
const ndjson = require('ndjson')
const argv = require('yargs/yargs')(process.argv.slice(2))
.option('property', {
type: 'boolean',
description: 'Also set id as a property'
})
.argv
if (argv._.length < 2) {
console.error("Usage: ./id.js input.geojson output.geojson")
process.exit(1)
}
const inputFile = argv._[0]
const outputFile = argv._[1]
if (!fs.existsSync(inputFile)) {
console.error(`${inputFile} not found`)
process.exit(1)
}
let index = 0
const id = new Transform({
readableObjectMode: true,
writableObjectMode: true,
transform(feature, encoding, callback) {
index++
if (process.stdout.isTTY && index % 10000 === 0) {
process.stdout.write(` ${index.toLocaleString()}\r`)
}
feature.id = index
if (argv.property) {
feature.properties.id = index
}
this.push(feature)
callback()
}
})
pipeline(
fs.createReadStream(inputFile),
ndjson.parse(),
id,
ndjson.stringify(),
fs.createWriteStream(outputFile),
err => {
if (err) {
console.log(err)
process.exit(1)
} else {
process.exit(0)
}
}
)
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