Merge all json files in a directory nodejs - json

Question

I would like to merge all json files in a directory in nodejs. The files are being uploaded by user and all i]I know is their names are device"count".json. Count being incrememented each time. I know of json-concat but how do I use it to merge all files in a directory?
jsonConcat({
src: [],
dest: "./result.json"
}, function (json) {
console.log(json);
});

Answer 1

You can use the fs modules to read the files in a directory and then pass them to json-concat.
const jsonConcat = require('json-concat');
const fs = require('fs');
// an array of filenames to concat
const files = [];
const theDirectory = __dirname; // or whatever directory you want to read
fs.readdirSync(theDirectory).forEach((file) => {
// you may want to filter these by extension, etc. to make sure they are JSON files
files.push(file);
})
// pass the "files" to json concat
jsonConcat({
src: files,
dest: "./result.json"
}, function (json) {
console.log(json);
});

Answer 2

if You read docs carefully You'll see this part:
The options object passed may have the following keys:
src:
(String) path pointing to a directory
(Array) array of paths pointing to files and/or directories
defaults to . (current working directory)
Note: if this is a path points to a single file, nothing will be done.
so here is fix:
1) move json files to some concrete path.
2) check this code:
jsonConcat({
src: './path/to/json/files',
dest: "./result.json"
}, function (json) {
console.log(json);
});
and here is the prove how it uses src param
Mostly it needs from developer not just to use 3-rd part packages, but also dive into it's sources.
in short: KISS (: