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'use strict';
const path = require('path');
const fs = require('graceful-fs');
const writeFileAtomic = require('write-file-atomic');
const sortKeys = require('sort-keys');
const makeDir = require('make-dir');
const pify = require('pify');
const detectIndent = require('detect-indent');
const init = (fn, fp, data, opts) => {
if (!fp) {
throw new TypeError('Expected a filepath');
}
if (data === undefined) {
throw new TypeError('Expected data to stringify');
}
opts = Object.assign({
indent: '\t',
sortKeys: false
}, opts);
if (opts.sortKeys) {
data = sortKeys(data, {
deep: true,
compare: typeof opts.sortKeys === 'function' && opts.sortKeys
});
}
return fn(fp, data, opts);
};
const readFile = fp => pify(fs.readFile)(fp, 'utf8').catch(() => {});
const main = (fp, data, opts) => {
return (opts.detectIndent ? readFile(fp) : Promise.resolve())
.then(str => {
const indent = str ? detectIndent(str).indent : opts.indent;
const json = JSON.stringify(data, opts.replacer, indent);
return pify(writeFileAtomic)(fp, `${json}\n`, {mode: opts.mode});
});
};
const mainSync = (fp, data, opts) => {
let indent = opts.indent;
if (opts.detectIndent) {
try {
const file = fs.readFileSync(fp, 'utf8');
indent = detectIndent(file).indent;
} catch (err) {
if (err.code !== 'ENOENT') {
throw err;
}
}
}
const json = JSON.stringify(data, opts.replacer, indent);
return writeFileAtomic.sync(fp, `${json}\n`, {mode: opts.mode});
};
module.exports = (fp, data, opts) => {
return makeDir(path.dirname(fp), {fs})
.then(() => init(main, fp, data, opts));
};
module.exports.sync = (fp, data, opts) => {
makeDir.sync(path.dirname(fp), {fs});
init(mainSync, fp, data, opts);
};
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